dirstate-item: change the internal storage and constructor value

This should be closer to what we do need and what we can actually reliably
record.

In practice it means that we abandon the prospect of storing much more refined
data for now. We don't have the necessary information nor code using it right
now. So it seems safer to just use a clearer version of what we had so far.

See the documentation changes for details.

Differential Revision: https://phab.mercurial-scm.org/D11557

mercurial/cext/parsers.c

@@ -1,1247 +1,1217
 /*
  parsers.c - efficient content parsing
 
  Copyright 2008 Olivia Mackall <[e-mail]> and others
 
  This software may be used and distributed according to the terms of
  the GNU General Public License, incorporated herein by reference.
 */
 
 #define PY_SSIZE_T_CLEAN
 #include <Python.h>
 #include <ctype.h>
 #include <stddef.h>
 #include <string.h>
 
 #include "bitmanipulation.h"
 #include "charencode.h"
 #include "util.h"
 
 #ifdef IS_PY3K
 /* The mapping of Python types is meant to be temporary to get Python
  * 3 to compile. We should remove this once Python 3 support is fully
  * supported and proper types are used in the extensions themselves. */
 #define PyInt_Check PyLong_Check
 #define PyInt_FromLong PyLong_FromLong
 #define PyInt_FromSsize_t PyLong_FromSsize_t
 #define PyInt_AsLong PyLong_AsLong
 #endif
 
 static const char *const versionerrortext = "Python minor version mismatch";
 
 static const int dirstate_v1_from_p2 = -2;
 static const int dirstate_v1_nonnormal = -1;
 static const int ambiguous_time = -1;
 
 static PyObject *dict_new_presized(PyObject *self, PyObject *args)
 {
 	Py_ssize_t expected_size;
 
 	if (!PyArg_ParseTuple(args, "n:make_presized_dict", &expected_size)) {
 		return NULL;
 	}
 
 	return _dict_new_presized(expected_size);
 }
 
 static PyObject *dirstate_item_new(PyTypeObject *subtype, PyObject *args,
                                    PyObject *kwds)
 {
 	/* We do all the initialization here and not a tp_init function because
 	 * dirstate_item is immutable. */
 	dirstateItemObject *t;
 	int wc_tracked;
 	int p1_tracked;
-	int p2_tracked;
-	int merged;
-	int clean_p1;
-	int clean_p2;
-	int possibly_dirty;
+	int p2_info;
+	int has_meaningful_data;
+	int has_meaningful_mtime;
+	int mode;
+	int size;
+	int mtime;
 	PyObject *parentfiledata;
 	static char *keywords_name[] = {
-	    "wc_tracked",     "p1_tracked",     "p2_tracked",
-	    "merged",         "clean_p1",       "clean_p2",
-	    "possibly_dirty", "parentfiledata", NULL,
+	    "wc_tracked",
+	    "p1_tracked",
+	    "p2_info",
+	    "has_meaningful_data",
+	    "has_meaningful_mtime",
+	    "parentfiledata",
+	    NULL,
 	};
 	wc_tracked = 0;
 	p1_tracked = 0;
-	p2_tracked = 0;
-	merged = 0;
-	clean_p1 = 0;
-	clean_p2 = 0;
-	possibly_dirty = 0;
+	p2_info = 0;
+	has_meaningful_mtime = 1;
+	has_meaningful_data = 1;
 	parentfiledata = Py_None;
-	if (!PyArg_ParseTupleAndKeywords(args, kwds, "|iiiiiiiO", keywords_name,
-	                                 &wc_tracked, &p1_tracked, &p2_tracked,
-	                                 &merged, &clean_p1, &clean_p2,
-	                                 &possibly_dirty, &parentfiledata
-
-	                                 )) {
-		return NULL;
-	}
-	if (merged && (clean_p1 || clean_p2)) {
-		PyErr_SetString(PyExc_RuntimeError,
-		                "`merged` argument incompatible with "
-		                "`clean_p1`/`clean_p2`");
+	if (!PyArg_ParseTupleAndKeywords(
+	        args, kwds, "|iiiiiO", keywords_name, &wc_tracked, &p1_tracked,
+	        &p2_info, &has_meaningful_data, &has_meaningful_mtime,
+	        &parentfiledata)) {
 		return NULL;
 	}
 	t = (dirstateItemObject *)subtype->tp_alloc(subtype, 1);
 	if (!t) {
 		return NULL;
 	}
 
 	t->flags = 0;
 	if (wc_tracked) {
 		t->flags |= dirstate_flag_wc_tracked;
 	}
 	if (p1_tracked) {
 		t->flags |= dirstate_flag_p1_tracked;
 	}
-	if (p2_tracked) {
-		t->flags |= dirstate_flag_p2_tracked;
-	}
-	if (possibly_dirty) {
-		t->flags |= dirstate_flag_possibly_dirty;
-	}
-	if (merged) {
-		t->flags |= dirstate_flag_merged;
+	if (p2_info) {
+		t->flags |= dirstate_flag_p2_info;
 	}
-	if (clean_p1) {
-		t->flags |= dirstate_flag_clean_p1;
-	}
-	if (clean_p2) {
-		t->flags |= dirstate_flag_clean_p2;
-	}
-	t->mode = 0;
-	t->size = dirstate_v1_nonnormal;
-	t->mtime = ambiguous_time;
+
 	if (parentfiledata != Py_None) {
 		if (!PyTuple_CheckExact(parentfiledata)) {
 			PyErr_SetString(
 			    PyExc_TypeError,
 			    "parentfiledata should be a Tuple or None");
 			return NULL;
 		}
-		t->mode =
-		    (int)PyLong_AsLong(PyTuple_GetItem(parentfiledata, 0));
-		t->size =
-		    (int)PyLong_AsLong(PyTuple_GetItem(parentfiledata, 1));
-		t->mtime =
-		    (int)PyLong_AsLong(PyTuple_GetItem(parentfiledata, 2));
+		mode = (int)PyLong_AsLong(PyTuple_GetItem(parentfiledata, 0));
+		size = (int)PyLong_AsLong(PyTuple_GetItem(parentfiledata, 1));
+		mtime = (int)PyLong_AsLong(PyTuple_GetItem(parentfiledata, 2));
+	} else {
+		has_meaningful_data = 0;
+		has_meaningful_mtime = 0;
+	}
+	if (has_meaningful_data) {
+		t->flags |= dirstate_flag_has_meaningful_data;
+		t->mode = mode;
+		t->size = size;
+	} else {
+		t->mode = 0;
+		t->size = 0;
+	}
+	if (has_meaningful_mtime) {
+		t->flags |= dirstate_flag_has_meaningful_mtime;
+		t->mtime = mtime;
+	} else {
+		t->mtime = 0;
 	}
 	return (PyObject *)t;
 }
 
 static void dirstate_item_dealloc(PyObject *o)
 {
 	PyObject_Del(o);
 }
 
 static inline bool dirstate_item_c_tracked(dirstateItemObject *self)
 {
 	return (self->flags & dirstate_flag_wc_tracked);
 }
 
+static inline bool dirstate_item_c_any_tracked(dirstateItemObject *self)
+{
+	const unsigned char mask = dirstate_flag_wc_tracked |
+	                           dirstate_flag_p1_tracked |
+	                           dirstate_flag_p2_info;
+	return (self->flags & mask);
+}
+
 static inline bool dirstate_item_c_added(dirstateItemObject *self)
 {
-	unsigned char mask =
+	const unsigned char mask =
 	    (dirstate_flag_wc_tracked | dirstate_flag_p1_tracked |
-	     dirstate_flag_p2_tracked);
-	unsigned char target = dirstate_flag_wc_tracked;
+	     dirstate_flag_p2_info);
+	const unsigned char target = dirstate_flag_wc_tracked;
 	return (self->flags & mask) == target;
 }
 
 static inline bool dirstate_item_c_removed(dirstateItemObject *self)
 {
 	if (self->flags & dirstate_flag_wc_tracked) {
 		return false;
 	}
 	return (self->flags &
-	        (dirstate_flag_p1_tracked | dirstate_flag_p2_tracked));
+	        (dirstate_flag_p1_tracked | dirstate_flag_p2_info));
 }
 
 static inline bool dirstate_item_c_merged(dirstateItemObject *self)
 {
 	return ((self->flags & dirstate_flag_wc_tracked) &&
-	        (self->flags & dirstate_flag_merged));
+	        (self->flags & dirstate_flag_p1_tracked) &&
+	        (self->flags & dirstate_flag_p2_info));
 }
 
 static inline bool dirstate_item_c_from_p2(dirstateItemObject *self)
 {
-	if (!dirstate_item_c_tracked(self)) {
-		return false;
-	}
-	return (self->flags & dirstate_flag_clean_p2);
+	return ((self->flags & dirstate_flag_wc_tracked) &&
+	        !(self->flags & dirstate_flag_p1_tracked) &&
+	        (self->flags & dirstate_flag_p2_info));
 }
 
 static inline char dirstate_item_c_v1_state(dirstateItemObject *self)
 {
 	if (dirstate_item_c_removed(self)) {
 		return 'r';
 	} else if (dirstate_item_c_merged(self)) {
 		return 'm';
 	} else if (dirstate_item_c_added(self)) {
 		return 'a';
 	} else {
 		return 'n';
 	}
 }
 
 static inline int dirstate_item_c_v1_mode(dirstateItemObject *self)
 {
+	if (self->flags & dirstate_flag_has_meaningful_data) {
 	return self->mode;
+	} else {
+		return 0;
+	}
 }
 
 static inline int dirstate_item_c_v1_size(dirstateItemObject *self)
 {
-	if (dirstate_item_c_removed(self) &&
-	    (self->flags & dirstate_flag_merged)) {
+	if (!(self->flags & dirstate_flag_wc_tracked) &&
+	    (self->flags & dirstate_flag_p2_info)) {
+		if (self->flags & dirstate_flag_p1_tracked) {
 		return dirstate_v1_nonnormal;
-	} else if (dirstate_item_c_removed(self) &&
-	           (self->flags & dirstate_flag_clean_p2)) {
+		} else {
 		return dirstate_v1_from_p2;
+		}
 	} else if (dirstate_item_c_removed(self)) {
 		return 0;
-	} else if (dirstate_item_c_merged(self)) {
+	} else if (self->flags & dirstate_flag_p2_info) {
 		return dirstate_v1_from_p2;
 	} else if (dirstate_item_c_added(self)) {
 		return dirstate_v1_nonnormal;
-	} else if (dirstate_item_c_from_p2(self)) {
-		return dirstate_v1_from_p2;
-	} else if (self->flags & dirstate_flag_possibly_dirty) {
-		return self->size; /* NON NORMAL ? */
+	} else if (self->flags & dirstate_flag_has_meaningful_data) {
+		return self->size;
 	} else {
-		return self->size;
+		return dirstate_v1_nonnormal;
 	}
 }
 
 static inline int dirstate_item_c_v1_mtime(dirstateItemObject *self)
 {
 	if (dirstate_item_c_removed(self)) {
 		return 0;
-	} else if (self->flags & dirstate_flag_possibly_dirty) {
-		return ambiguous_time;
-	} else if (dirstate_item_c_merged(self)) {
-		return ambiguous_time;
-	} else if (dirstate_item_c_added(self)) {
-		return ambiguous_time;
-	} else if (dirstate_item_c_from_p2(self)) {
+	} else if (!(self->flags & dirstate_flag_has_meaningful_mtime) ||
+	           !(self->flags & dirstate_flag_p1_tracked) ||
+	           !(self->flags & dirstate_flag_wc_tracked) ||
+	           (self->flags & dirstate_flag_p2_info)) {
 		return ambiguous_time;
 	} else {
 		return self->mtime;
 	}
 }
 
 static PyObject *dirstate_item_v1_state(dirstateItemObject *self)
 {
 	char state = dirstate_item_c_v1_state(self);
 	return PyBytes_FromStringAndSize(&state, 1);
 };
 
 static PyObject *dirstate_item_v1_mode(dirstateItemObject *self)
 {
 	return PyInt_FromLong(dirstate_item_c_v1_mode(self));
 };
 
 static PyObject *dirstate_item_v1_size(dirstateItemObject *self)
 {
 	return PyInt_FromLong(dirstate_item_c_v1_size(self));
 };
 
 static PyObject *dirstate_item_v1_mtime(dirstateItemObject *self)
 {
 	return PyInt_FromLong(dirstate_item_c_v1_mtime(self));
 };
 
 static PyObject *dirstate_item_need_delay(dirstateItemObject *self,
                                           PyObject *value)
 {
 	long now;
 	if (!pylong_to_long(value, &now)) {
 		return NULL;
 	}
 	if (dirstate_item_c_v1_state(self) == 'n' &&
 	    dirstate_item_c_v1_mtime(self) == now) {
 		Py_RETURN_TRUE;
 	} else {
 		Py_RETURN_FALSE;
 	}
 };
 
 /* This will never change since it's bound to V1
  */
 static inline dirstateItemObject *
 dirstate_item_from_v1_data(char state, int mode, int size, int mtime)
 {
 	dirstateItemObject *t =
 	    PyObject_New(dirstateItemObject, &dirstateItemType);
 	if (!t) {
 		return NULL;
 	}
-
-	if (state == 'm') {
-		t->flags =
-		    (dirstate_flag_wc_tracked | dirstate_flag_p1_tracked |
-		     dirstate_flag_p2_tracked | dirstate_flag_merged);
-		t->mode = 0;
-		t->size = dirstate_v1_from_p2;
-		t->mtime = ambiguous_time;
-	} else if (state == 'a') {
-		t->flags = dirstate_flag_wc_tracked;
-		t->mode = 0;
-		t->size = dirstate_v1_nonnormal;
-		t->mtime = ambiguous_time;
-	} else if (state == 'r') {
+	t->flags = 0;
 		t->mode = 0;
 		t->size = 0;
 		t->mtime = 0;
+
+	if (state == 'm') {
+		t->flags = (dirstate_flag_wc_tracked |
+		            dirstate_flag_p1_tracked | dirstate_flag_p2_info);
+	} else if (state == 'a') {
+		t->flags = dirstate_flag_wc_tracked;
+	} else if (state == 'r') {
 		if (size == dirstate_v1_nonnormal) {
 			t->flags =
-			    (dirstate_flag_p1_tracked |
-			     dirstate_flag_p2_tracked | dirstate_flag_merged);
+			    dirstate_flag_p1_tracked | dirstate_flag_p2_info;
 		} else if (size == dirstate_v1_from_p2) {
-			t->flags =
-			    (dirstate_flag_p2_tracked | dirstate_flag_clean_p2);
+			t->flags = dirstate_flag_p2_info;
 		} else {
 			t->flags = dirstate_flag_p1_tracked;
 		}
 	} else if (state == 'n') {
 		if (size == dirstate_v1_from_p2) {
 			t->flags =
-			    (dirstate_flag_wc_tracked |
-			     dirstate_flag_p2_tracked | dirstate_flag_clean_p2);
-			t->mode = 0;
-			t->size = dirstate_v1_from_p2;
-			t->mtime = ambiguous_time;
+			    dirstate_flag_wc_tracked | dirstate_flag_p2_info;
 		} else if (size == dirstate_v1_nonnormal) {
-			t->flags = (dirstate_flag_wc_tracked |
-			            dirstate_flag_p1_tracked |
-			            dirstate_flag_possibly_dirty);
-			t->mode = 0;
-			t->size = dirstate_v1_nonnormal;
-			t->mtime = ambiguous_time;
+			t->flags =
+			    dirstate_flag_wc_tracked | dirstate_flag_p1_tracked;
 		} else if (mtime == ambiguous_time) {
 			t->flags = (dirstate_flag_wc_tracked |
 			            dirstate_flag_p1_tracked |
-			            dirstate_flag_possibly_dirty);
+			            dirstate_flag_has_meaningful_data);
 			t->mode = mode;
 			t->size = size;
-			t->mtime = 0;
 		} else {
 			t->flags = (dirstate_flag_wc_tracked |
-			            dirstate_flag_p1_tracked);
+			            dirstate_flag_p1_tracked |
+			            dirstate_flag_has_meaningful_data |
+			            dirstate_flag_has_meaningful_mtime);
 			t->mode = mode;
 			t->size = size;
 			t->mtime = mtime;
 		}
 	} else {
 		PyErr_Format(PyExc_RuntimeError,
 		             "unknown state: `%c` (%d, %d, %d)", state, mode,
 		             size, mtime, NULL);
 		Py_DECREF(t);
 		return NULL;
 	}
 
 	return t;
 }
 
 /* This will never change since it's bound to V1, unlike `dirstate_item_new` */
 static PyObject *dirstate_item_from_v1_meth(PyTypeObject *subtype,
                                             PyObject *args)
 {
 	/* We do all the initialization here and not a tp_init function because
 	 * dirstate_item is immutable. */
 	char state;
 	int size, mode, mtime;
 	if (!PyArg_ParseTuple(args, "ciii", &state, &mode, &size, &mtime)) {
 		return NULL;
 	}
 	return (PyObject *)dirstate_item_from_v1_data(state, mode, size, mtime);
 };
 
 /* constructor to help legacy API to build a new "added" item
 
 Should eventually be removed */
 static PyObject *dirstate_item_new_added(PyTypeObject *subtype)
 {
 	dirstateItemObject *t;
 	t = (dirstateItemObject *)subtype->tp_alloc(subtype, 1);
 	if (!t) {
 		return NULL;
 	}
 	t->flags = dirstate_flag_wc_tracked;
 	t->mode = 0;
-	t->size = dirstate_v1_nonnormal;
-	t->mtime = ambiguous_time;
+	t->size = 0;
+	t->mtime = 0;
 	return (PyObject *)t;
 };
 
 /* constructor to help legacy API to build a new "merged" item
 
 Should eventually be removed */
 static PyObject *dirstate_item_new_merged(PyTypeObject *subtype)
 {
 	dirstateItemObject *t;
 	t = (dirstateItemObject *)subtype->tp_alloc(subtype, 1);
 	if (!t) {
 		return NULL;
 	}
 	t->flags = (dirstate_flag_wc_tracked | dirstate_flag_p1_tracked |
-	            dirstate_flag_p2_tracked | dirstate_flag_merged);
+	            dirstate_flag_p2_info);
 	t->mode = 0;
-	t->size = dirstate_v1_from_p2;
-	t->mtime = ambiguous_time;
+	t->size = 0;
+	t->mtime = 0;
 	return (PyObject *)t;
 };
 
 /* constructor to help legacy API to build a new "from_p2" item
 
 Should eventually be removed */
 static PyObject *dirstate_item_new_from_p2(PyTypeObject *subtype)
 {
 	/* We do all the initialization here and not a tp_init function because
 	 * dirstate_item is immutable. */
 	dirstateItemObject *t;
 	t = (dirstateItemObject *)subtype->tp_alloc(subtype, 1);
 	if (!t) {
 		return NULL;
 	}
-	t->flags = (dirstate_flag_wc_tracked | dirstate_flag_p2_tracked |
-	            dirstate_flag_clean_p2);
+	t->flags = dirstate_flag_wc_tracked | dirstate_flag_p2_info;
 	t->mode = 0;
-	t->size = dirstate_v1_from_p2;
-	t->mtime = ambiguous_time;
+	t->size = 0;
+	t->mtime = 0;
 	return (PyObject *)t;
 };
 
 /* constructor to help legacy API to build a new "possibly" item
 
 Should eventually be removed */
 static PyObject *dirstate_item_new_possibly_dirty(PyTypeObject *subtype)
 {
 	/* We do all the initialization here and not a tp_init function because
 	 * dirstate_item is immutable. */
 	dirstateItemObject *t;
 	t = (dirstateItemObject *)subtype->tp_alloc(subtype, 1);
 	if (!t) {
 		return NULL;
 	}
-	t->flags = (dirstate_flag_wc_tracked | dirstate_flag_p1_tracked |
-	            dirstate_flag_possibly_dirty);
+	t->flags = dirstate_flag_wc_tracked | dirstate_flag_p1_tracked;
 	t->mode = 0;
-	t->size = dirstate_v1_nonnormal;
-	t->mtime = ambiguous_time;
+	t->size = 0;
+	t->mtime = 0;
 	return (PyObject *)t;
 };
 
 /* constructor to help legacy API to build a new "normal" item
 
 Should eventually be removed */
 static PyObject *dirstate_item_new_normal(PyTypeObject *subtype, PyObject *args)
 {
 	/* We do all the initialization here and not a tp_init function because
 	 * dirstate_item is immutable. */
 	dirstateItemObject *t;
 	int size, mode, mtime;
 	if (!PyArg_ParseTuple(args, "iii", &mode, &size, &mtime)) {
 		return NULL;
 	}
 
 	t = (dirstateItemObject *)subtype->tp_alloc(subtype, 1);
 	if (!t) {
 		return NULL;
 	}
 	t->flags = (dirstate_flag_wc_tracked | dirstate_flag_p1_tracked);
 	t->mode = mode;
 	t->size = size;
 	t->mtime = mtime;
 	return (PyObject *)t;
 };
 
 /* This means the next status call will have to actually check its content
    to make sure it is correct. */
 static PyObject *dirstate_item_set_possibly_dirty(dirstateItemObject *self)
 {
-	self->flags |= dirstate_flag_possibly_dirty;
+	self->flags &= ~dirstate_flag_has_meaningful_mtime;
 	Py_RETURN_NONE;
 }
 
 /* See docstring of the python implementation for details */
 static PyObject *dirstate_item_set_clean(dirstateItemObject *self,
                                          PyObject *args)
 {
 	int size, mode, mtime;
 	if (!PyArg_ParseTuple(args, "iii", &mode, &size, &mtime)) {
 		return NULL;
 	}
-	self->flags = dirstate_flag_wc_tracked | dirstate_flag_p1_tracked;
+	self->flags = dirstate_flag_wc_tracked | dirstate_flag_p1_tracked |
+	              dirstate_flag_has_meaningful_data |
+	              dirstate_flag_has_meaningful_mtime;
 	self->mode = mode;
 	self->size = size;
 	self->mtime = mtime;
 	Py_RETURN_NONE;
 }
 
 static PyObject *dirstate_item_set_tracked(dirstateItemObject *self)
 {
 	self->flags |= dirstate_flag_wc_tracked;
-	self->flags |= dirstate_flag_possibly_dirty;
-	/* size = None on the python size turn into size = NON_NORMAL when
-	 * accessed. So the next line is currently required, but a some future
-	 * clean up would be welcome. */
-	self->size = dirstate_v1_nonnormal;
+	self->flags &= ~dirstate_flag_has_meaningful_mtime;
 	Py_RETURN_NONE;
 }
 
 static PyObject *dirstate_item_set_untracked(dirstateItemObject *self)
 {
 	self->flags &= ~dirstate_flag_wc_tracked;
 	self->mode = 0;
 	self->mtime = 0;
 	self->size = 0;
 	Py_RETURN_NONE;
 }
 
 static PyObject *dirstate_item_drop_merge_data(dirstateItemObject *self)
 {
-	if (dirstate_item_c_merged(self) || dirstate_item_c_from_p2(self)) {
-		if (dirstate_item_c_merged(self)) {
-			self->flags |= dirstate_flag_p1_tracked;
-		} else {
-			self->flags &= ~dirstate_flag_p1_tracked;
-		}
-		self->flags &=
-		    ~(dirstate_flag_merged | dirstate_flag_clean_p1 |
-		      dirstate_flag_clean_p2 | dirstate_flag_p2_tracked);
-		self->flags |= dirstate_flag_possibly_dirty;
+	if (self->flags & dirstate_flag_p2_info) {
+		self->flags &= ~(dirstate_flag_p2_info |
+		                 dirstate_flag_has_meaningful_data |
+		                 dirstate_flag_has_meaningful_mtime);
 		self->mode = 0;
 		self->mtime = 0;
-		/* size = None on the python size turn into size = NON_NORMAL
-		 * when accessed. So the next line is currently required, but a
-		 * some future clean up would be welcome. */
-		self->size = dirstate_v1_nonnormal;
+		self->size = 0;
 	}
 	Py_RETURN_NONE;
 }
 static PyMethodDef dirstate_item_methods[] = {
     {"v1_state", (PyCFunction)dirstate_item_v1_state, METH_NOARGS,
      "return a \"state\" suitable for v1 serialization"},
     {"v1_mode", (PyCFunction)dirstate_item_v1_mode, METH_NOARGS,
      "return a \"mode\" suitable for v1 serialization"},
     {"v1_size", (PyCFunction)dirstate_item_v1_size, METH_NOARGS,
      "return a \"size\" suitable for v1 serialization"},
     {"v1_mtime", (PyCFunction)dirstate_item_v1_mtime, METH_NOARGS,
      "return a \"mtime\" suitable for v1 serialization"},
     {"need_delay", (PyCFunction)dirstate_item_need_delay, METH_O,
      "True if the stored mtime would be ambiguous with the current time"},
     {"from_v1_data", (PyCFunction)dirstate_item_from_v1_meth,
      METH_VARARGS | METH_CLASS, "build a new DirstateItem object from V1 data"},
     {"new_added", (PyCFunction)dirstate_item_new_added,
      METH_NOARGS | METH_CLASS,
      "constructor to help legacy API to build a new \"added\" item"},
     {"new_merged", (PyCFunction)dirstate_item_new_merged,
      METH_NOARGS | METH_CLASS,
      "constructor to help legacy API to build a new \"merged\" item"},
     {"new_from_p2", (PyCFunction)dirstate_item_new_from_p2,
      METH_NOARGS | METH_CLASS,
      "constructor to help legacy API to build a new \"from_p2\" item"},
     {"new_possibly_dirty", (PyCFunction)dirstate_item_new_possibly_dirty,
      METH_NOARGS | METH_CLASS,
      "constructor to help legacy API to build a new \"possibly_dirty\" item"},
     {"new_normal", (PyCFunction)dirstate_item_new_normal,
      METH_VARARGS | METH_CLASS,
      "constructor to help legacy API to build a new \"normal\" item"},
     {"set_possibly_dirty", (PyCFunction)dirstate_item_set_possibly_dirty,
      METH_NOARGS, "mark a file as \"possibly dirty\""},
     {"set_clean", (PyCFunction)dirstate_item_set_clean, METH_VARARGS,
      "mark a file as \"clean\""},
     {"set_tracked", (PyCFunction)dirstate_item_set_tracked, METH_NOARGS,
      "mark a file as \"tracked\""},
     {"set_untracked", (PyCFunction)dirstate_item_set_untracked, METH_NOARGS,
      "mark a file as \"untracked\""},
     {"drop_merge_data", (PyCFunction)dirstate_item_drop_merge_data, METH_NOARGS,
      "remove all \"merge-only\" from a DirstateItem"},
     {NULL} /* Sentinel */
 };
 
 static PyObject *dirstate_item_get_mode(dirstateItemObject *self)
 {
 	return PyInt_FromLong(dirstate_item_c_v1_mode(self));
 };
 
 static PyObject *dirstate_item_get_size(dirstateItemObject *self)
 {
 	return PyInt_FromLong(dirstate_item_c_v1_size(self));
 };
 
 static PyObject *dirstate_item_get_mtime(dirstateItemObject *self)
 {
 	return PyInt_FromLong(dirstate_item_c_v1_mtime(self));
 };
 
 static PyObject *dirstate_item_get_state(dirstateItemObject *self)
 {
 	char state = dirstate_item_c_v1_state(self);
 	return PyBytes_FromStringAndSize(&state, 1);
 };
 
 static PyObject *dirstate_item_get_tracked(dirstateItemObject *self)
 {
 	if (dirstate_item_c_tracked(self)) {
 		Py_RETURN_TRUE;
 	} else {
 		Py_RETURN_FALSE;
 	}
 };
 
 static PyObject *dirstate_item_get_added(dirstateItemObject *self)
 {
 	if (dirstate_item_c_added(self)) {
 		Py_RETURN_TRUE;
 	} else {
 		Py_RETURN_FALSE;
 	}
 };
 
 static PyObject *dirstate_item_get_merged(dirstateItemObject *self)
 {
 	if (dirstate_item_c_merged(self)) {
 		Py_RETURN_TRUE;
 	} else {
 		Py_RETURN_FALSE;
 	}
 };
 
 static PyObject *dirstate_item_get_from_p2(dirstateItemObject *self)
 {
 	if (dirstate_item_c_from_p2(self)) {
 		Py_RETURN_TRUE;
 	} else {
 		Py_RETURN_FALSE;
 	}
 };
 
 static PyObject *dirstate_item_get_maybe_clean(dirstateItemObject *self)
 {
 	if (!(self->flags & dirstate_flag_wc_tracked)) {
 		Py_RETURN_FALSE;
-	} else if (dirstate_item_c_added(self)) {
+	} else if (!(self->flags & dirstate_flag_p1_tracked)) {
 		Py_RETURN_FALSE;
-	} else if (self->flags & dirstate_flag_merged) {
-		Py_RETURN_FALSE;
-	} else if (self->flags & dirstate_flag_clean_p2) {
+	} else if (self->flags & dirstate_flag_p2_info) {
 		Py_RETURN_FALSE;
 	} else {
 		Py_RETURN_TRUE;
 	}
 };
 
 static PyObject *dirstate_item_get_any_tracked(dirstateItemObject *self)
 {
-	unsigned char mask = dirstate_flag_wc_tracked |
-	                     dirstate_flag_p1_tracked |
-	                     dirstate_flag_p2_tracked;
-	if ((self->flags & mask) != 0) {
+	if (dirstate_item_c_any_tracked(self)) {
 		Py_RETURN_TRUE;
 	} else {
 		Py_RETURN_FALSE;
 	}
 };
 
 static PyObject *dirstate_item_get_removed(dirstateItemObject *self)
 {
 	if (dirstate_item_c_removed(self)) {
 		Py_RETURN_TRUE;
 	} else {
 		Py_RETURN_FALSE;
 	}
 };
 
 static PyGetSetDef dirstate_item_getset[] = {
     {"mode", (getter)dirstate_item_get_mode, NULL, "mode", NULL},
     {"size", (getter)dirstate_item_get_size, NULL, "size", NULL},
     {"mtime", (getter)dirstate_item_get_mtime, NULL, "mtime", NULL},
     {"state", (getter)dirstate_item_get_state, NULL, "state", NULL},
     {"tracked", (getter)dirstate_item_get_tracked, NULL, "tracked", NULL},
     {"added", (getter)dirstate_item_get_added, NULL, "added", NULL},
     {"merged", (getter)dirstate_item_get_merged, NULL, "merged", NULL},
     {"from_p2", (getter)dirstate_item_get_from_p2, NULL, "from_p2", NULL},
     {"maybe_clean", (getter)dirstate_item_get_maybe_clean, NULL, "maybe_clean",
      NULL},
     {"any_tracked", (getter)dirstate_item_get_any_tracked, NULL, "any_tracked",
      NULL},
     {"removed", (getter)dirstate_item_get_removed, NULL, "removed", NULL},
     {NULL} /* Sentinel */
 };
 
 PyTypeObject dirstateItemType = {
     PyVarObject_HEAD_INIT(NULL, 0)     /* header */
     "dirstate_tuple",                  /* tp_name */
     sizeof(dirstateItemObject),        /* tp_basicsize */
     0,                                 /* tp_itemsize */
     (destructor)dirstate_item_dealloc, /* tp_dealloc */
     0,                                 /* tp_print */
     0,                                 /* tp_getattr */
     0,                                 /* tp_setattr */
     0,                                 /* tp_compare */
     0,                                 /* tp_repr */
     0,                                 /* tp_as_number */
     0,                                 /* tp_as_sequence */
     0,                                 /* tp_as_mapping */
     0,                                 /* tp_hash  */
     0,                                 /* tp_call */
     0,                                 /* tp_str */
     0,                                 /* tp_getattro */
     0,                                 /* tp_setattro */
     0,                                 /* tp_as_buffer */
     Py_TPFLAGS_DEFAULT,                /* tp_flags */
     "dirstate tuple",                  /* tp_doc */
     0,                                 /* tp_traverse */
     0,                                 /* tp_clear */
     0,                                 /* tp_richcompare */
     0,                                 /* tp_weaklistoffset */
     0,                                 /* tp_iter */
     0,                                 /* tp_iternext */
     dirstate_item_methods,             /* tp_methods */
     0,                                 /* tp_members */
     dirstate_item_getset,              /* tp_getset */
     0,                                 /* tp_base */
     0,                                 /* tp_dict */
     0,                                 /* tp_descr_get */
     0,                                 /* tp_descr_set */
     0,                                 /* tp_dictoffset */
     0,                                 /* tp_init */
     0,                                 /* tp_alloc */
     dirstate_item_new,                 /* tp_new */
 };
 
 static PyObject *parse_dirstate(PyObject *self, PyObject *args)
 {
 	PyObject *dmap, *cmap, *parents = NULL, *ret = NULL;
 	PyObject *fname = NULL, *cname = NULL, *entry = NULL;
 	char state, *cur, *str, *cpos;
 	int mode, size, mtime;
 	unsigned int flen, pos = 40;
 	Py_ssize_t len = 40;
 	Py_ssize_t readlen;
 
 	if (!PyArg_ParseTuple(
 	        args, PY23("O!O!s#:parse_dirstate", "O!O!y#:parse_dirstate"),
 	        &PyDict_Type, &dmap, &PyDict_Type, &cmap, &str, &readlen)) {
 		goto quit;
 	}
 
 	len = readlen;
 
 	/* read parents */
 	if (len < 40) {
 		PyErr_SetString(PyExc_ValueError,
 		                "too little data for parents");
 		goto quit;
 	}
 
 	parents = Py_BuildValue(PY23("s#s#", "y#y#"), str, (Py_ssize_t)20,
 	                        str + 20, (Py_ssize_t)20);
 	if (!parents) {
 		goto quit;
 	}
 
 	/* read filenames */
 	while (pos >= 40 && pos < len) {
 		if (pos + 17 > len) {
 			PyErr_SetString(PyExc_ValueError,
 			                "overflow in dirstate");
 			goto quit;
 		}
 		cur = str + pos;
 		/* unpack header */
 		state = *cur;
 		mode = getbe32(cur + 1);
 		size = getbe32(cur + 5);
 		mtime = getbe32(cur + 9);
 		flen = getbe32(cur + 13);
 		pos += 17;
 		cur += 17;
 		if (flen > len - pos) {
 			PyErr_SetString(PyExc_ValueError,
 			                "overflow in dirstate");
 			goto quit;
 		}
 
 		entry = (PyObject *)dirstate_item_from_v1_data(state, mode,
 		                                               size, mtime);
 		if (!entry)
 			goto quit;
 		cpos = memchr(cur, 0, flen);
 		if (cpos) {
 			fname = PyBytes_FromStringAndSize(cur, cpos - cur);
 			cname = PyBytes_FromStringAndSize(
 			    cpos + 1, flen - (cpos - cur) - 1);
 			if (!fname || !cname ||
 			    PyDict_SetItem(cmap, fname, cname) == -1 ||
 			    PyDict_SetItem(dmap, fname, entry) == -1) {
 				goto quit;
 			}
 			Py_DECREF(cname);
 		} else {
 			fname = PyBytes_FromStringAndSize(cur, flen);
 			if (!fname ||
 			    PyDict_SetItem(dmap, fname, entry) == -1) {
 				goto quit;
 			}
 		}
 		Py_DECREF(fname);
 		Py_DECREF(entry);
 		fname = cname = entry = NULL;
 		pos += flen;
 	}
 
 	ret = parents;
 	Py_INCREF(ret);
 quit:
 	Py_XDECREF(fname);
 	Py_XDECREF(cname);
 	Py_XDECREF(entry);
 	Py_XDECREF(parents);
 	return ret;
 }
 
 /*
  * Efficiently pack a dirstate object into its on-disk format.
  */
 static PyObject *pack_dirstate(PyObject *self, PyObject *args)
 {
 	PyObject *packobj = NULL;
 	PyObject *map, *copymap, *pl, *mtime_unset = NULL;
 	Py_ssize_t nbytes, pos, l;
 	PyObject *k, *v = NULL, *pn;
 	char *p, *s;
 	int now;
 
 	if (!PyArg_ParseTuple(args, "O!O!O!i:pack_dirstate", &PyDict_Type, &map,
 	                      &PyDict_Type, &copymap, &PyTuple_Type, &pl,
 	                      &now)) {
 		return NULL;
 	}
 
 	if (PyTuple_Size(pl) != 2) {
 		PyErr_SetString(PyExc_TypeError, "expected 2-element tuple");
 		return NULL;
 	}
 
 	/* Figure out how much we need to allocate. */
 	for (nbytes = 40, pos = 0; PyDict_Next(map, &pos, &k, &v);) {
 		PyObject *c;
 		if (!PyBytes_Check(k)) {
 			PyErr_SetString(PyExc_TypeError, "expected string key");
 			goto bail;
 		}
 		nbytes += PyBytes_GET_SIZE(k) + 17;
 		c = PyDict_GetItem(copymap, k);
 		if (c) {
 			if (!PyBytes_Check(c)) {
 				PyErr_SetString(PyExc_TypeError,
 				                "expected string key");
 				goto bail;
 			}
 			nbytes += PyBytes_GET_SIZE(c) + 1;
 		}
 	}
 
 	packobj = PyBytes_FromStringAndSize(NULL, nbytes);
 	if (packobj == NULL) {
 		goto bail;
 	}
 
 	p = PyBytes_AS_STRING(packobj);
 
 	pn = PyTuple_GET_ITEM(pl, 0);
 	if (PyBytes_AsStringAndSize(pn, &s, &l) == -1 || l != 20) {
 		PyErr_SetString(PyExc_TypeError, "expected a 20-byte hash");
 		goto bail;
 	}
 	memcpy(p, s, l);
 	p += 20;
 	pn = PyTuple_GET_ITEM(pl, 1);
 	if (PyBytes_AsStringAndSize(pn, &s, &l) == -1 || l != 20) {
 		PyErr_SetString(PyExc_TypeError, "expected a 20-byte hash");
 		goto bail;
 	}
 	memcpy(p, s, l);
 	p += 20;
 
 	for (pos = 0; PyDict_Next(map, &pos, &k, &v);) {
 		dirstateItemObject *tuple;
 		char state;
 		int mode, size, mtime;
 		Py_ssize_t len, l;
 		PyObject *o;
 		char *t;
 
 		if (!dirstate_tuple_check(v)) {
 			PyErr_SetString(PyExc_TypeError,
 			                "expected a dirstate tuple");
 			goto bail;
 		}
 		tuple = (dirstateItemObject *)v;
 
 		state = dirstate_item_c_v1_state(tuple);
 		mode = dirstate_item_c_v1_mode(tuple);
 		size = dirstate_item_c_v1_size(tuple);
 		mtime = dirstate_item_c_v1_mtime(tuple);
 		if (state == 'n' && mtime == now) {
 			/* See pure/parsers.py:pack_dirstate for why we do
 			 * this. */
 			mtime = -1;
 			mtime_unset = (PyObject *)dirstate_item_from_v1_data(
 			    state, mode, size, mtime);
 			if (!mtime_unset) {
 				goto bail;
 			}
 			if (PyDict_SetItem(map, k, mtime_unset) == -1) {
 				goto bail;
 			}
 			Py_DECREF(mtime_unset);
 			mtime_unset = NULL;
 		}
 		*p++ = state;
 		putbe32((uint32_t)mode, p);
 		putbe32((uint32_t)size, p + 4);
 		putbe32((uint32_t)mtime, p + 8);
 		t = p + 12;
 		p += 16;
 		len = PyBytes_GET_SIZE(k);
 		memcpy(p, PyBytes_AS_STRING(k), len);
 		p += len;
 		o = PyDict_GetItem(copymap, k);
 		if (o) {
 			*p++ = '\0';
 			l = PyBytes_GET_SIZE(o);
 			memcpy(p, PyBytes_AS_STRING(o), l);
 			p += l;
 			len += l + 1;
 		}
 		putbe32((uint32_t)len, t);
 	}
 
 	pos = p - PyBytes_AS_STRING(packobj);
 	if (pos != nbytes) {
 		PyErr_Format(PyExc_SystemError, "bad dirstate size: %ld != %ld",
 		             (long)pos, (long)nbytes);
 		goto bail;
 	}
 
 	return packobj;
 bail:
 	Py_XDECREF(mtime_unset);
 	Py_XDECREF(packobj);
 	Py_XDECREF(v);
 	return NULL;
 }
 
 #define BUMPED_FIX 1
 #define USING_SHA_256 2
 #define FM1_HEADER_SIZE (4 + 8 + 2 + 2 + 1 + 1 + 1)
 
 static PyObject *readshas(const char *source, unsigned char num,
                           Py_ssize_t hashwidth)
 {
 	int i;
 	PyObject *list = PyTuple_New(num);
 	if (list == NULL) {
 		return NULL;
 	}
 	for (i = 0; i < num; i++) {
 		PyObject *hash = PyBytes_FromStringAndSize(source, hashwidth);
 		if (hash == NULL) {
 			Py_DECREF(list);
 			return NULL;
 		}
 		PyTuple_SET_ITEM(list, i, hash);
 		source += hashwidth;
 	}
 	return list;
 }
 
 static PyObject *fm1readmarker(const char *databegin, const char *dataend,
                                uint32_t *msize)
 {
 	const char *data = databegin;
 	const char *meta;
 
 	double mtime;
 	int16_t tz;
 	uint16_t flags;
 	unsigned char nsuccs, nparents, nmetadata;
 	Py_ssize_t hashwidth = 20;
 
 	PyObject *prec = NULL, *parents = NULL, *succs = NULL;
 	PyObject *metadata = NULL, *ret = NULL;
 	int i;
 
 	if (data + FM1_HEADER_SIZE > dataend) {
 		goto overflow;
 	}
 
 	*msize = getbe32(data);
 	data += 4;
 	mtime = getbefloat64(data);
 	data += 8;
 	tz = getbeint16(data);
 	data += 2;
 	flags = getbeuint16(data);
 	data += 2;
 
 	if (flags & USING_SHA_256) {
 		hashwidth = 32;
 	}
 
 	nsuccs = (unsigned char)(*data++);
 	nparents = (unsigned char)(*data++);
 	nmetadata = (unsigned char)(*data++);
 
 	if (databegin + *msize > dataend) {
 		goto overflow;
 	}
 	dataend = databegin + *msize; /* narrow down to marker size */
 
 	if (data + hashwidth > dataend) {
 		goto overflow;
 	}
 	prec = PyBytes_FromStringAndSize(data, hashwidth);
 	data += hashwidth;
 	if (prec == NULL) {
 		goto bail;
 	}
 
 	if (data + nsuccs * hashwidth > dataend) {
 		goto overflow;
 	}
 	succs = readshas(data, nsuccs, hashwidth);
 	if (succs == NULL) {
 		goto bail;
 	}
 	data += nsuccs * hashwidth;
 
 	if (nparents == 1 || nparents == 2) {
 		if (data + nparents * hashwidth > dataend) {
 			goto overflow;
 		}
 		parents = readshas(data, nparents, hashwidth);
 		if (parents == NULL) {
 			goto bail;
 		}
 		data += nparents * hashwidth;
 	} else {
 		parents = Py_None;
 		Py_INCREF(parents);
 	}
 
 	if (data + 2 * nmetadata > dataend) {
 		goto overflow;
 	}
 	meta = data + (2 * nmetadata);
 	metadata = PyTuple_New(nmetadata);
 	if (metadata == NULL) {
 		goto bail;
 	}
 	for (i = 0; i < nmetadata; i++) {
 		PyObject *tmp, *left = NULL, *right = NULL;
 		Py_ssize_t leftsize = (unsigned char)(*data++);
 		Py_ssize_t rightsize = (unsigned char)(*data++);
 		if (meta + leftsize + rightsize > dataend) {
 			goto overflow;
 		}
 		left = PyBytes_FromStringAndSize(meta, leftsize);
 		meta += leftsize;
 		right = PyBytes_FromStringAndSize(meta, rightsize);
 		meta += rightsize;
 		tmp = PyTuple_New(2);
 		if (!left || !right || !tmp) {
 			Py_XDECREF(left);
 			Py_XDECREF(right);
 			Py_XDECREF(tmp);
 			goto bail;
 		}
 		PyTuple_SET_ITEM(tmp, 0, left);
 		PyTuple_SET_ITEM(tmp, 1, right);
 		PyTuple_SET_ITEM(metadata, i, tmp);
 	}
 	ret = Py_BuildValue("(OOHO(di)O)", prec, succs, flags, metadata, mtime,
 	                    (int)tz * 60, parents);
 	goto bail; /* return successfully */
 
 overflow:
 	PyErr_SetString(PyExc_ValueError, "overflow in obsstore");
 bail:
 	Py_XDECREF(prec);
 	Py_XDECREF(succs);
 	Py_XDECREF(metadata);
 	Py_XDECREF(parents);
 	return ret;
 }
 
 static PyObject *fm1readmarkers(PyObject *self, PyObject *args)
 {
 	const char *data, *dataend;
 	Py_ssize_t datalen, offset, stop;
 	PyObject *markers = NULL;
 
 	if (!PyArg_ParseTuple(args, PY23("s#nn", "y#nn"), &data, &datalen,
 	                      &offset, &stop)) {
 		return NULL;
 	}
 	if (offset < 0) {
 		PyErr_SetString(PyExc_ValueError,
 		                "invalid negative offset in fm1readmarkers");
 		return NULL;
 	}
 	if (stop > datalen) {
 		PyErr_SetString(
 		    PyExc_ValueError,
 		    "stop longer than data length in fm1readmarkers");
 		return NULL;
 	}
 	dataend = data + datalen;
 	data += offset;
 	markers = PyList_New(0);
 	if (!markers) {
 		return NULL;
 	}
 	while (offset < stop) {
 		uint32_t msize;
 		int error;
 		PyObject *record = fm1readmarker(data, dataend, &msize);
 		if (!record) {
 			goto bail;
 		}
 		error = PyList_Append(markers, record);
 		Py_DECREF(record);
 		if (error) {
 			goto bail;
 		}
 		data += msize;
 		offset += msize;
 	}
 	return markers;
 bail:
 	Py_DECREF(markers);
 	return NULL;
 }
 
 static char parsers_doc[] = "Efficient content parsing.";
 
 PyObject *encodedir(PyObject *self, PyObject *args);
 PyObject *pathencode(PyObject *self, PyObject *args);
 PyObject *lowerencode(PyObject *self, PyObject *args);
 PyObject *parse_index2(PyObject *self, PyObject *args, PyObject *kwargs);
 
 static PyMethodDef methods[] = {
     {"pack_dirstate", pack_dirstate, METH_VARARGS, "pack a dirstate\n"},
     {"parse_dirstate", parse_dirstate, METH_VARARGS, "parse a dirstate\n"},
     {"parse_index2", (PyCFunction)parse_index2, METH_VARARGS | METH_KEYWORDS,
      "parse a revlog index\n"},
     {"isasciistr", isasciistr, METH_VARARGS, "check if an ASCII string\n"},
     {"asciilower", asciilower, METH_VARARGS, "lowercase an ASCII string\n"},
     {"asciiupper", asciiupper, METH_VARARGS, "uppercase an ASCII string\n"},
     {"dict_new_presized", dict_new_presized, METH_VARARGS,
      "construct a dict with an expected size\n"},
     {"make_file_foldmap", make_file_foldmap, METH_VARARGS,
      "make file foldmap\n"},
     {"jsonescapeu8fast", jsonescapeu8fast, METH_VARARGS,
      "escape a UTF-8 byte string to JSON (fast path)\n"},
     {"encodedir", encodedir, METH_VARARGS, "encodedir a path\n"},
     {"pathencode", pathencode, METH_VARARGS, "fncache-encode a path\n"},
     {"lowerencode", lowerencode, METH_VARARGS, "lower-encode a path\n"},
     {"fm1readmarkers", fm1readmarkers, METH_VARARGS,
      "parse v1 obsolete markers\n"},
     {NULL, NULL}};
 
 void dirs_module_init(PyObject *mod);
 void manifest_module_init(PyObject *mod);
 void revlog_module_init(PyObject *mod);
 
 static const int version = 20;
 
 static void module_init(PyObject *mod)
 {
 	PyModule_AddIntConstant(mod, "version", version);
 
 	/* This module constant has two purposes.  First, it lets us unit test
 	 * the ImportError raised without hard-coding any error text.  This
 	 * means we can change the text in the future without breaking tests,
 	 * even across changesets without a recompile.  Second, its presence
 	 * can be used to determine whether the version-checking logic is
 	 * present, which also helps in testing across changesets without a
 	 * recompile.  Note that this means the pure-Python version of parsers
 	 * should not have this module constant. */
 	PyModule_AddStringConstant(mod, "versionerrortext", versionerrortext);
 
 	dirs_module_init(mod);
 	manifest_module_init(mod);
 	revlog_module_init(mod);
 
 	if (PyType_Ready(&dirstateItemType) < 0) {
 		return;
 	}
 	Py_INCREF(&dirstateItemType);
 	PyModule_AddObject(mod, "DirstateItem", (PyObject *)&dirstateItemType);
 }
 
 static int check_python_version(void)
 {
 	PyObject *sys = PyImport_ImportModule("sys"), *ver;
 	long hexversion;
 	if (!sys) {
 		return -1;
 	}
 	ver = PyObject_GetAttrString(sys, "hexversion");
 	Py_DECREF(sys);
 	if (!ver) {
 		return -1;
 	}
 	hexversion = PyInt_AsLong(ver);
 	Py_DECREF(ver);
 	/* sys.hexversion is a 32-bit number by default, so the -1 case
 	 * should only occur in unusual circumstances (e.g. if sys.hexversion
 	 * is manually set to an invalid value). */
 	if ((hexversion == -1) || (hexversion >> 16 != PY_VERSION_HEX >> 16)) {
 		PyErr_Format(PyExc_ImportError,
 		             "%s: The Mercurial extension "
 		             "modules were compiled with Python " PY_VERSION
 		             ", but "
 		             "Mercurial is currently using Python with "
 		             "sys.hexversion=%ld: "
 		             "Python %s\n at: %s",
 		             versionerrortext, hexversion, Py_GetVersion(),
 		             Py_GetProgramFullPath());
 		return -1;
 	}
 	return 0;
 }
 
 #ifdef IS_PY3K
 static struct PyModuleDef parsers_module = {PyModuleDef_HEAD_INIT, "parsers",
                                             parsers_doc, -1, methods};
 
 PyMODINIT_FUNC PyInit_parsers(void)
 {
 	PyObject *mod;
 
 	if (check_python_version() == -1)
 		return NULL;
 	mod = PyModule_Create(&parsers_module);
 	module_init(mod);
 	return mod;
 }
 #else
 PyMODINIT_FUNC initparsers(void)
 {
 	PyObject *mod;
 
 	if (check_python_version() == -1) {
 		return;
 	}
 	mod = Py_InitModule3("parsers", methods, parsers_doc);
 	module_init(mod);
 }
 #endif

mercurial/cext/util.h

@@ -1,82 +1,80
 /*
  util.h - utility functions for interfacing with the various python APIs.
 
  This software may be used and distributed according to the terms of
  the GNU General Public License, incorporated herein by reference.
 */
 
 #ifndef _HG_UTIL_H_
 #define _HG_UTIL_H_
 
 #include "compat.h"
 
 #if PY_MAJOR_VERSION >= 3
 #define IS_PY3K
 #endif
 
 /* helper to switch things like string literal depending on Python version */
 #ifdef IS_PY3K
 #define PY23(py2, py3) py3
 #else
 #define PY23(py2, py3) py2
 #endif
 
 /* clang-format off */
 typedef struct {
 	PyObject_HEAD
 	unsigned char flags;
 	int mode;
 	int size;
 	int mtime;
 } dirstateItemObject;
 /* clang-format on */
 
 static const unsigned char dirstate_flag_wc_tracked = 1;
 static const unsigned char dirstate_flag_p1_tracked = 1 << 1;
-static const unsigned char dirstate_flag_p2_tracked = 1 << 2;
-static const unsigned char dirstate_flag_possibly_dirty = 1 << 3;
-static const unsigned char dirstate_flag_merged = 1 << 4;
-static const unsigned char dirstate_flag_clean_p1 = 1 << 5;
-static const unsigned char dirstate_flag_clean_p2 = 1 << 6;
+static const unsigned char dirstate_flag_p2_info = 1 << 2;
+static const unsigned char dirstate_flag_has_meaningful_data = 1 << 3;
+static const unsigned char dirstate_flag_has_meaningful_mtime = 1 << 4;
 
 extern PyTypeObject dirstateItemType;
 #define dirstate_tuple_check(op) (Py_TYPE(op) == &dirstateItemType)
 
 #ifndef MIN
 #define MIN(a, b) (((a) < (b)) ? (a) : (b))
 #endif
 /* VC9 doesn't include bool and lacks stdbool.h based on my searching */
 #if defined(_MSC_VER) || __STDC_VERSION__ < 199901L
 #define true 1
 #define false 0
 typedef unsigned char bool;
 #else
 #include <stdbool.h>
 #endif
 
 static inline PyObject *_dict_new_presized(Py_ssize_t expected_size)
 {
 	/* _PyDict_NewPresized expects a minused parameter, but it actually
 	   creates a dictionary that's the nearest power of two bigger than the
 	   parameter. For example, with the initial minused = 1000, the
 	   dictionary created has size 1024. Of course in a lot of cases that
 	   can be greater than the maximum load factor Python's dict object
 	   expects (= 2/3), so as soon as we cross the threshold we'll resize
 	   anyway. So create a dictionary that's at least 3/2 the size. */
 	return _PyDict_NewPresized(((1 + expected_size) / 2) * 3);
 }
 
 /* Convert a PyInt or PyLong to a long. Returns false if there is an
    error, in which case an exception will already have been set. */
 static inline bool pylong_to_long(PyObject *pylong, long *out)
 {
 	*out = PyLong_AsLong(pylong);
 	/* Fast path to avoid hitting PyErr_Occurred if the value was obviously
 	 * not an error. */
 	if (*out != -1) {
 		return true;
 	}
 	return PyErr_Occurred() == NULL;
 }
 
 #endif /* _HG_UTIL_H_ */

mercurial/dirstatemap.py

@@ -1,805 +1,781
 # dirstatemap.py
 #
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2 or any later version.
 
 from __future__ import absolute_import
 
 import errno
 
 from .i18n import _
 
 from . import (
     error,
     pathutil,
     policy,
     pycompat,
     txnutil,
     util,
 )
 
 from .dirstateutils import (
     docket as docketmod,
 )
 
 parsers = policy.importmod('parsers')
 rustmod = policy.importrust('dirstate')
 
 propertycache = util.propertycache
 
 if rustmod is None:
     DirstateItem = parsers.DirstateItem
 else:
     DirstateItem = rustmod.DirstateItem
 
 rangemask = 0x7FFFFFFF
 
 
 class _dirstatemapcommon(object):
     """
     Methods that are identical for both implementations of the dirstatemap
     class, with and without Rust extensions enabled.
     """
 
     # please pytype
 
     _map = None
     copymap = None
 
     def __init__(self, ui, opener, root, nodeconstants, use_dirstate_v2):
         self._use_dirstate_v2 = use_dirstate_v2
         self._nodeconstants = nodeconstants
         self._ui = ui
         self._opener = opener
         self._root = root
         self._filename = b'dirstate'
         self._nodelen = 20  # Also update Rust code when changing this!
         self._parents = None
         self._dirtyparents = False
 
         # for consistent view between _pl() and _read() invocations
         self._pendingmode = None
 
     def preload(self):
         """Loads the underlying data, if it's not already loaded"""
         self._map
 
     def get(self, key, default=None):
         return self._map.get(key, default)
 
     def __len__(self):
         return len(self._map)
 
     def __iter__(self):
         return iter(self._map)
 
     def __contains__(self, key):
         return key in self._map
 
     def __getitem__(self, item):
         return self._map[item]
 
     ### sub-class utility method
     #
     # Use to allow for generic implementation of some method while still coping
     # with minor difference between implementation.
 
     def _dirs_incr(self, filename, old_entry=None):
         """incremente the dirstate counter if applicable
 
         This might be a no-op for some subclass who deal with directory
         tracking in a different way.
         """
 
     def _dirs_decr(self, filename, old_entry=None, remove_variant=False):
         """decremente the dirstate counter if applicable
 
         This might be a no-op for some subclass who deal with directory
         tracking in a different way.
         """
 
     def _refresh_entry(self, f, entry):
         """record updated state of an entry"""
 
     def _insert_entry(self, f, entry):
         """add a new dirstate entry (or replace an unrelated one)
 
         The fact it is actually new is the responsability of the caller
         """
 
     def _drop_entry(self, f):
         """remove any entry for file f
 
         This should also drop associated copy information
 
         The fact we actually need to drop it is the responsability of the caller"""
 
     ### method to manipulate the entries
 
     def set_possibly_dirty(self, filename):
         """record that the current state of the file on disk is unknown"""
         entry = self[filename]
         entry.set_possibly_dirty()
         self._refresh_entry(filename, entry)
 
     def set_clean(self, filename, mode, size, mtime):
         """mark a file as back to a clean state"""
         entry = self[filename]
         mtime = mtime & rangemask
         size = size & rangemask
         entry.set_clean(mode, size, mtime)
         self._refresh_entry(filename, entry)
         self.copymap.pop(filename, None)
 
     def set_tracked(self, filename):
         new = False
         entry = self.get(filename)
         if entry is None:
             self._dirs_incr(filename)
             entry = DirstateItem(
-                p1_tracked=False,
-                p2_tracked=False,
                 wc_tracked=True,
-                merged=False,
-                clean_p1=False,
-                clean_p2=False,
-                possibly_dirty=False,
-                parentfiledata=None,
             )
 
             self._insert_entry(filename, entry)
             new = True
         elif not entry.tracked:
             self._dirs_incr(filename, entry)
             entry.set_tracked()
             self._refresh_entry(filename, entry)
             new = True
         else:
             # XXX This is probably overkill for more case, but we need this to
             # fully replace the `normallookup` call with `set_tracked` one.
             # Consider smoothing this in the future.
             entry.set_possibly_dirty()
             self._refresh_entry(filename, entry)
         return new
 
     def set_untracked(self, f):
         """Mark a file as no longer tracked in the dirstate map"""
         entry = self.get(f)
         if entry is None:
             return False
         else:
             self._dirs_decr(f, old_entry=entry, remove_variant=not entry.added)
             if not entry.merged:
                 self.copymap.pop(f, None)
             entry.set_untracked()
             self._refresh_entry(f, entry)
             return True
 
     def reset_state(
         self,
         filename,
         wc_tracked=False,
         p1_tracked=False,
         p2_tracked=False,
         merged=False,
         clean_p1=False,
         clean_p2=False,
         possibly_dirty=False,
         parentfiledata=None,
     ):
         """Set a entry to a given state, diregarding all previous state
 
         This is to be used by the part of the dirstate API dedicated to
         adjusting the dirstate after a update/merge.
 
         note: calling this might result to no entry existing at all if the
         dirstate map does not see any point at having one for this file
         anymore.
         """
         if merged and (clean_p1 or clean_p2):
             msg = b'`merged` argument incompatible with `clean_p1`/`clean_p2`'
             raise error.ProgrammingError(msg)
         # copy information are now outdated
         # (maybe new information should be in directly passed to this function)
         self.copymap.pop(filename, None)
 
         if not (p1_tracked or p2_tracked or wc_tracked):
             old_entry = self._map.get(filename)
             self._drop_entry(filename)
             self._dirs_decr(filename, old_entry=old_entry)
             return
-        elif merged:
-            pass
-        elif not (p1_tracked or p2_tracked) and wc_tracked:
-            pass  # file is added, nothing special to adjust
-        elif (p1_tracked or p2_tracked) and not wc_tracked:
-            pass
-        elif clean_p2 and wc_tracked:
-            pass
-        elif not p1_tracked and p2_tracked and wc_tracked:
-            clean_p2 = True
-        elif possibly_dirty:
-            pass
-        elif wc_tracked:
-            # this is a "normal" file
-            if parentfiledata is None:
-                msg = b'failed to pass parentfiledata for a normal file: %s'
-                msg %= filename
-                raise error.ProgrammingError(msg)
-        else:
-            assert False, 'unreachable'
+
+        p2_info = merged or clean_p2
+        if merged:
+            assert p1_tracked
+
+        has_meaningful_mtime = not possibly_dirty
 
         old_entry = self._map.get(filename)
         self._dirs_incr(filename, old_entry)
         entry = DirstateItem(
             wc_tracked=wc_tracked,
             p1_tracked=p1_tracked,
-            p2_tracked=p2_tracked,
-            merged=merged,
-            clean_p1=clean_p1,
-            clean_p2=clean_p2,
-            possibly_dirty=possibly_dirty,
+            p2_info=p2_info,
+            has_meaningful_mtime=has_meaningful_mtime,
             parentfiledata=parentfiledata,
         )
         self._insert_entry(filename, entry)
 
 
 class dirstatemap(_dirstatemapcommon):
     """Map encapsulating the dirstate's contents.
 
     The dirstate contains the following state:
 
     - `identity` is the identity of the dirstate file, which can be used to
       detect when changes have occurred to the dirstate file.
 
     - `parents` is a pair containing the parents of the working copy. The
       parents are updated by calling `setparents`.
 
     - the state map maps filenames to tuples of (state, mode, size, mtime),
       where state is a single character representing 'normal', 'added',
       'removed', or 'merged'. It is read by treating the dirstate as a
       dict.  File state is updated by calling various methods (see each
       documentation for details):
 
       - `reset_state`,
       - `set_tracked`
       - `set_untracked`
       - `set_clean`
       - `set_possibly_dirty`
 
     - `copymap` maps destination filenames to their source filename.
 
     The dirstate also provides the following views onto the state:
 
     - `filefoldmap` is a dict mapping normalized filenames to the denormalized
       form that they appear as in the dirstate.
 
     - `dirfoldmap` is a dict mapping normalized directory names to the
       denormalized form that they appear as in the dirstate.
     """
 
     def __init__(self, ui, opener, root, nodeconstants, use_dirstate_v2):
         super(dirstatemap, self).__init__(
             ui, opener, root, nodeconstants, use_dirstate_v2
         )
         if self._use_dirstate_v2:
             msg = "Dirstate V2 not supportedi"
             msg += "(should have detected unsupported requirement)"
             raise error.ProgrammingError(msg)
 
     ### Core data storage and access
 
     @propertycache
     def _map(self):
         self._map = {}
         self.read()
         return self._map
 
     @propertycache
     def copymap(self):
         self.copymap = {}
         self._map
         return self.copymap
 
     def clear(self):
         self._map.clear()
         self.copymap.clear()
         self.setparents(self._nodeconstants.nullid, self._nodeconstants.nullid)
         util.clearcachedproperty(self, b"_dirs")
         util.clearcachedproperty(self, b"_alldirs")
         util.clearcachedproperty(self, b"filefoldmap")
         util.clearcachedproperty(self, b"dirfoldmap")
 
     def items(self):
         return pycompat.iteritems(self._map)
 
     # forward for python2,3 compat
     iteritems = items
 
     def debug_iter(self, all):
         """
         Return an iterator of (filename, state, mode, size, mtime) tuples
 
         `all` is unused when Rust is not enabled
         """
         for (filename, item) in self.items():
             yield (filename, item.state, item.mode, item.size, item.mtime)
 
     def keys(self):
         return self._map.keys()
 
     ### reading/setting parents
 
     def parents(self):
         if not self._parents:
             try:
                 fp = self._opendirstatefile()
                 st = fp.read(2 * self._nodelen)
                 fp.close()
             except IOError as err:
                 if err.errno != errno.ENOENT:
                     raise
                 # File doesn't exist, so the current state is empty
                 st = b''
 
             l = len(st)
             if l == self._nodelen * 2:
                 self._parents = (
                     st[: self._nodelen],
                     st[self._nodelen : 2 * self._nodelen],
                 )
             elif l == 0:
                 self._parents = (
                     self._nodeconstants.nullid,
                     self._nodeconstants.nullid,
                 )
             else:
                 raise error.Abort(
                     _(b'working directory state appears damaged!')
                 )
 
         return self._parents
 
     def setparents(self, p1, p2, fold_p2=False):
         self._parents = (p1, p2)
         self._dirtyparents = True
         copies = {}
         if fold_p2:
             for f, s in pycompat.iteritems(self._map):
                 # Discard "merged" markers when moving away from a merge state
                 if s.merged or s.from_p2:
                     source = self.copymap.pop(f, None)
                     if source:
                         copies[f] = source
                     s.drop_merge_data()
         return copies
 
     ### disk interaction
 
     def read(self):
         # ignore HG_PENDING because identity is used only for writing
         self.identity = util.filestat.frompath(
             self._opener.join(self._filename)
         )
 
         try:
             fp = self._opendirstatefile()
             try:
                 st = fp.read()
             finally:
                 fp.close()
         except IOError as err:
             if err.errno != errno.ENOENT:
                 raise
             return
         if not st:
             return
 
         if util.safehasattr(parsers, b'dict_new_presized'):
             # Make an estimate of the number of files in the dirstate based on
             # its size. This trades wasting some memory for avoiding costly
             # resizes. Each entry have a prefix of 17 bytes followed by one or
             # two path names. Studies on various large-scale real-world repositories
             # found 54 bytes a reasonable upper limit for the average path names.
             # Copy entries are ignored for the sake of this estimate.
             self._map = parsers.dict_new_presized(len(st) // 71)
 
         # Python's garbage collector triggers a GC each time a certain number
         # of container objects (the number being defined by
         # gc.get_threshold()) are allocated. parse_dirstate creates a tuple
         # for each file in the dirstate. The C version then immediately marks
         # them as not to be tracked by the collector. However, this has no
         # effect on when GCs are triggered, only on what objects the GC looks
         # into. This means that O(number of files) GCs are unavoidable.
         # Depending on when in the process's lifetime the dirstate is parsed,
         # this can get very expensive. As a workaround, disable GC while
         # parsing the dirstate.
         #
         # (we cannot decorate the function directly since it is in a C module)
         parse_dirstate = util.nogc(parsers.parse_dirstate)
         p = parse_dirstate(self._map, self.copymap, st)
         if not self._dirtyparents:
             self.setparents(*p)
 
         # Avoid excess attribute lookups by fast pathing certain checks
         self.__contains__ = self._map.__contains__
         self.__getitem__ = self._map.__getitem__
         self.get = self._map.get
 
     def write(self, _tr, st, now):
         d = parsers.pack_dirstate(self._map, self.copymap, self.parents(), now)
         st.write(d)
         st.close()
         self._dirtyparents = False
 
     def _opendirstatefile(self):
         fp, mode = txnutil.trypending(self._root, self._opener, self._filename)
         if self._pendingmode is not None and self._pendingmode != mode:
             fp.close()
             raise error.Abort(
                 _(b'working directory state may be changed parallelly')
             )
         self._pendingmode = mode
         return fp
 
     @propertycache
     def identity(self):
         self._map
         return self.identity
 
     ### code related to maintaining and accessing "extra" property
     # (e.g. "has_dir")
 
     def _dirs_incr(self, filename, old_entry=None):
         """incremente the dirstate counter if applicable"""
         if (
             old_entry is None or old_entry.removed
         ) and "_dirs" in self.__dict__:
             self._dirs.addpath(filename)
         if old_entry is None and "_alldirs" in self.__dict__:
             self._alldirs.addpath(filename)
 
     def _dirs_decr(self, filename, old_entry=None, remove_variant=False):
         """decremente the dirstate counter if applicable"""
         if old_entry is not None:
             if "_dirs" in self.__dict__ and not old_entry.removed:
                 self._dirs.delpath(filename)
             if "_alldirs" in self.__dict__ and not remove_variant:
                 self._alldirs.delpath(filename)
         elif remove_variant and "_alldirs" in self.__dict__:
             self._alldirs.addpath(filename)
         if "filefoldmap" in self.__dict__:
             normed = util.normcase(filename)
             self.filefoldmap.pop(normed, None)
 
     @propertycache
     def filefoldmap(self):
         """Returns a dictionary mapping normalized case paths to their
         non-normalized versions.
         """
         try:
             makefilefoldmap = parsers.make_file_foldmap
         except AttributeError:
             pass
         else:
             return makefilefoldmap(
                 self._map, util.normcasespec, util.normcasefallback
             )
 
         f = {}
         normcase = util.normcase
         for name, s in pycompat.iteritems(self._map):
             if not s.removed:
                 f[normcase(name)] = name
         f[b'.'] = b'.'  # prevents useless util.fspath() invocation
         return f
 
     @propertycache
     def dirfoldmap(self):
         f = {}
         normcase = util.normcase
         for name in self._dirs:
             f[normcase(name)] = name
         return f
 
     def hastrackeddir(self, d):
         """
         Returns True if the dirstate contains a tracked (not removed) file
         in this directory.
         """
         return d in self._dirs
 
     def hasdir(self, d):
         """
         Returns True if the dirstate contains a file (tracked or removed)
         in this directory.
         """
         return d in self._alldirs
 
     @propertycache
     def _dirs(self):
         return pathutil.dirs(self._map, only_tracked=True)
 
     @propertycache
     def _alldirs(self):
         return pathutil.dirs(self._map)
 
     ### code related to manipulation of entries and copy-sources
 
     def _refresh_entry(self, f, entry):
         if not entry.any_tracked:
             self._map.pop(f, None)
 
     def _insert_entry(self, f, entry):
         self._map[f] = entry
 
     def _drop_entry(self, f):
         self._map.pop(f, None)
         self.copymap.pop(f, None)
 
 
 if rustmod is not None:
 
     class dirstatemap(_dirstatemapcommon):
         def __init__(self, ui, opener, root, nodeconstants, use_dirstate_v2):
             super(dirstatemap, self).__init__(
                 ui, opener, root, nodeconstants, use_dirstate_v2
             )
             self._docket = None
 
         ### Core data storage and access
 
         @property
         def docket(self):
             if not self._docket:
                 if not self._use_dirstate_v2:
                     raise error.ProgrammingError(
                         b'dirstate only has a docket in v2 format'
                     )
                 self._docket = docketmod.DirstateDocket.parse(
                     self._readdirstatefile(), self._nodeconstants
                 )
             return self._docket
 
         @propertycache
         def _map(self):
             """
             Fills the Dirstatemap when called.
             """
             # ignore HG_PENDING because identity is used only for writing
             self.identity = util.filestat.frompath(
                 self._opener.join(self._filename)
             )
 
             if self._use_dirstate_v2:
                 if self.docket.uuid:
                     # TODO: use mmap when possible
                     data = self._opener.read(self.docket.data_filename())
                 else:
                     data = b''
                 self._map = rustmod.DirstateMap.new_v2(
                     data, self.docket.data_size, self.docket.tree_metadata
                 )
                 parents = self.docket.parents
             else:
                 self._map, parents = rustmod.DirstateMap.new_v1(
                     self._readdirstatefile()
                 )
 
             if parents and not self._dirtyparents:
                 self.setparents(*parents)
 
             self.__contains__ = self._map.__contains__
             self.__getitem__ = self._map.__getitem__
             self.get = self._map.get
             return self._map
 
         @property
         def copymap(self):
             return self._map.copymap()
 
         def debug_iter(self, all):
             """
             Return an iterator of (filename, state, mode, size, mtime) tuples
 
             `all`: also include with `state == b' '` dirstate tree nodes that
             don't have an associated `DirstateItem`.
 
             """
             return self._map.debug_iter(all)
 
         def clear(self):
             self._map.clear()
             self.setparents(
                 self._nodeconstants.nullid, self._nodeconstants.nullid
             )
             util.clearcachedproperty(self, b"_dirs")
             util.clearcachedproperty(self, b"_alldirs")
             util.clearcachedproperty(self, b"dirfoldmap")
 
         def items(self):
             return self._map.items()
 
         # forward for python2,3 compat
         iteritems = items
 
         def keys(self):
             return iter(self._map)
 
         ### reading/setting parents
 
         def setparents(self, p1, p2, fold_p2=False):
             self._parents = (p1, p2)
             self._dirtyparents = True
             copies = {}
             if fold_p2:
                 # Collect into an intermediate list to avoid a `RuntimeError`
                 # exception due to mutation during iteration.
                 # TODO: move this the whole loop to Rust where `iter_mut`
                 # enables in-place mutation of elements of a collection while
                 # iterating it, without mutating the collection itself.
                 files_with_p2_info = [
                     f for f, s in self._map.items() if s.merged or s.from_p2
                 ]
                 rust_map = self._map
                 for f in files_with_p2_info:
                     e = rust_map.get(f)
                     source = self.copymap.pop(f, None)
                     if source:
                         copies[f] = source
                     e.drop_merge_data()
                     rust_map.set_dirstate_item(f, e)
             return copies
 
         def parents(self):
             if not self._parents:
                 if self._use_dirstate_v2:
                     self._parents = self.docket.parents
                 else:
                     read_len = self._nodelen * 2
                     st = self._readdirstatefile(read_len)
                     l = len(st)
                     if l == read_len:
                         self._parents = (
                             st[: self._nodelen],
                             st[self._nodelen : 2 * self._nodelen],
                         )
                     elif l == 0:
                         self._parents = (
                             self._nodeconstants.nullid,
                             self._nodeconstants.nullid,
                         )
                     else:
                         raise error.Abort(
                             _(b'working directory state appears damaged!')
                         )
 
             return self._parents
 
         ### disk interaction
 
         @propertycache
         def identity(self):
             self._map
             return self.identity
 
         def write(self, tr, st, now):
             if not self._use_dirstate_v2:
                 p1, p2 = self.parents()
                 packed = self._map.write_v1(p1, p2, now)
                 st.write(packed)
                 st.close()
                 self._dirtyparents = False
                 return
 
             # We can only append to an existing data file if there is one
             can_append = self.docket.uuid is not None
             packed, meta, append = self._map.write_v2(now, can_append)
             if append:
                 docket = self.docket
                 data_filename = docket.data_filename()
                 if tr:
                     tr.add(data_filename, docket.data_size)
                 with self._opener(data_filename, b'r+b') as fp:
                     fp.seek(docket.data_size)
                     assert fp.tell() == docket.data_size
                     written = fp.write(packed)
                     if written is not None:  # py2 may return None
                         assert written == len(packed), (written, len(packed))
                 docket.data_size += len(packed)
                 docket.parents = self.parents()
                 docket.tree_metadata = meta
                 st.write(docket.serialize())
                 st.close()
             else:
                 old_docket = self.docket
                 new_docket = docketmod.DirstateDocket.with_new_uuid(
                     self.parents(), len(packed), meta
                 )
                 data_filename = new_docket.data_filename()
                 if tr:
                     tr.add(data_filename, 0)
                 self._opener.write(data_filename, packed)
                 # Write the new docket after the new data file has been
                 # written. Because `st` was opened with `atomictemp=True`,
                 # the actual `.hg/dirstate` file is only affected on close.
                 st.write(new_docket.serialize())
                 st.close()
                 # Remove the old data file after the new docket pointing to
                 # the new data file was written.
                 if old_docket.uuid:
                     data_filename = old_docket.data_filename()
                     unlink = lambda _tr=None: self._opener.unlink(data_filename)
                     if tr:
                         category = b"dirstate-v2-clean-" + old_docket.uuid
                         tr.addpostclose(category, unlink)
                     else:
                         unlink()
                 self._docket = new_docket
             # Reload from the newly-written file
             util.clearcachedproperty(self, b"_map")
             self._dirtyparents = False
 
         def _opendirstatefile(self):
             fp, mode = txnutil.trypending(
                 self._root, self._opener, self._filename
             )
             if self._pendingmode is not None and self._pendingmode != mode:
                 fp.close()
                 raise error.Abort(
                     _(b'working directory state may be changed parallelly')
                 )
             self._pendingmode = mode
             return fp
 
         def _readdirstatefile(self, size=-1):
             try:
                 with self._opendirstatefile() as fp:
                     return fp.read(size)
             except IOError as err:
                 if err.errno != errno.ENOENT:
                     raise
                 # File doesn't exist, so the current state is empty
                 return b''
 
         ### code related to maintaining and accessing "extra" property
         # (e.g. "has_dir")
 
         @propertycache
         def filefoldmap(self):
             """Returns a dictionary mapping normalized case paths to their
             non-normalized versions.
             """
             return self._map.filefoldmapasdict()
 
         def hastrackeddir(self, d):
             return self._map.hastrackeddir(d)
 
         def hasdir(self, d):
             return self._map.hasdir(d)
 
         @propertycache
         def dirfoldmap(self):
             f = {}
             normcase = util.normcase
             for name in self._map.tracked_dirs():
                 f[normcase(name)] = name
             return f
 
         ### code related to manipulation of entries and copy-sources
 
         def _refresh_entry(self, f, entry):
             if not entry.any_tracked:
                 self._map.drop_item_and_copy_source(f)
             else:
                 self._map.addfile(f, entry)
 
         def _insert_entry(self, f, entry):
             self._map.addfile(f, entry)
 
         def _drop_entry(self, f):
             self._map.drop_item_and_copy_source(f)
 
         def __setitem__(self, key, value):
             assert isinstance(value, DirstateItem)
             self._map.set_dirstate_item(key, value)

mercurial/pure/parsers.py

@@ -1,842 +1,784
 # parsers.py - Python implementation of parsers.c
 #
 # Copyright 2009 Olivia Mackall <[e-mail]> and others
 #
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2 or any later version.
 
 from __future__ import absolute_import
 
 import struct
 import zlib
 
 from ..node import (
     nullrev,
     sha1nodeconstants,
 )
 from ..thirdparty import attr
 from .. import (
     error,
     pycompat,
     revlogutils,
     util,
 )
 
 from ..revlogutils import nodemap as nodemaputil
 from ..revlogutils import constants as revlog_constants
 
 stringio = pycompat.bytesio
 
 
 _pack = struct.pack
 _unpack = struct.unpack
 _compress = zlib.compress
 _decompress = zlib.decompress
 
 
 # a special value used internally for `size` if the file come from the other parent
 FROM_P2 = -2
 
 # a special value used internally for `size` if the file is modified/merged/added
 NONNORMAL = -1
 
 # a special value used internally for `time` if the time is ambigeous
 AMBIGUOUS_TIME = -1
 
 
 @attr.s(slots=True, init=False)
 class DirstateItem(object):
     """represent a dirstate entry
 
     It hold multiple attributes
 
     # about file tracking
     - wc_tracked: is the file tracked by the working copy
     - p1_tracked: is the file tracked in working copy first parent
-    - p2_tracked: is the file tracked in working copy second parent
-
-    # about what possible merge action related to this file
-    - clean_p1: merge picked the file content from p1
-    - clean_p2: merge picked the file content from p2
-    - merged: file gather changes from both side.
+    - p2_info: the file has been involved in some merge operation. Either
+               because it was actually merged, or because the p2 version was
+               ahead, or because some renamed moved it there. In either case
+               `hg status` will want it displayed as modified.
 
     # about the file state expected from p1 manifest:
     - mode: the file mode in p1
     - size: the file size in p1
 
+    These value can be set to None, which mean we don't have a meaningful value
+    to compare with. Either because we don't really care about them as there
+    `status` is known without having to look at the disk or because we don't
+    know these right now and a full comparison will be needed to find out if
+    the file is clean.
+
     # about the file state on disk last time we saw it:
     - mtime: the last known clean mtime for the file.
 
-    The last three item (mode, size and mtime) can be None if no meaningful (or
-    trusted) value exists.
-
+    This value can be set to None if no cachable state exist. Either because we
+    do not care (see previous section) or because we could not cache something
+    yet.
     """
 
     _wc_tracked = attr.ib()
     _p1_tracked = attr.ib()
-    _p2_tracked = attr.ib()
-    # the three item above should probably be combined
-    #
-    # However it is unclear if they properly cover some of the most advanced
-    # merge case. So we should probably wait on this to be settled.
-    _merged = attr.ib()
-    _clean_p1 = attr.ib()
-    _clean_p2 = attr.ib()
-    _possibly_dirty = attr.ib()
+    _p2_info = attr.ib()
     _mode = attr.ib()
     _size = attr.ib()
     _mtime = attr.ib()
 
     def __init__(
         self,
         wc_tracked=False,
         p1_tracked=False,
-        p2_tracked=False,
-        merged=False,
-        clean_p1=False,
-        clean_p2=False,
-        possibly_dirty=False,
+        p2_info=False,
+        has_meaningful_data=True,
+        has_meaningful_mtime=True,
         parentfiledata=None,
     ):
-        if merged and (clean_p1 or clean_p2):
-            msg = b'`merged` argument incompatible with `clean_p1`/`clean_p2`'
-            raise error.ProgrammingError(msg)
-
-        assert not (merged and not p1_tracked)
         self._wc_tracked = wc_tracked
         self._p1_tracked = p1_tracked
-        self._p2_tracked = p2_tracked
-        self._merged = merged
-        self._clean_p1 = clean_p1
-        self._clean_p2 = clean_p2
-        self._possibly_dirty = possibly_dirty
-        if parentfiledata is None:
+        self._p2_info = p2_info
+
             self._mode = None
             self._size = None
             self._mtime = None
-        else:
+        if parentfiledata is None:
+            has_meaningful_mtime = False
+            has_meaningful_data = False
+        if has_meaningful_data:
             self._mode = parentfiledata[0]
             self._size = parentfiledata[1]
+        if has_meaningful_mtime:
             self._mtime = parentfiledata[2]
 
     @classmethod
     def new_added(cls):
         """constructor to help legacy API to build a new "added" item
 
         Should eventually be removed
         """
-        instance = cls()
-        instance._wc_tracked = True
-        instance._p1_tracked = False
-        instance._p2_tracked = False
-        return instance
+        return cls(wc_tracked=True)
 
     @classmethod
     def new_merged(cls):
         """constructor to help legacy API to build a new "merged" item
 
         Should eventually be removed
         """
-        instance = cls()
-        instance._wc_tracked = True
-        instance._p1_tracked = True  # might not be True because of rename ?
-        instance._p2_tracked = True  # might not be True because of rename ?
-        instance._merged = True
-        return instance
+        return cls(wc_tracked=True, p1_tracked=True, p2_info=True)
 
     @classmethod
     def new_from_p2(cls):
         """constructor to help legacy API to build a new "from_p2" item
 
         Should eventually be removed
         """
-        instance = cls()
-        instance._wc_tracked = True
-        instance._p1_tracked = False  # might actually be True
-        instance._p2_tracked = True
-        instance._clean_p2 = True
-        return instance
+        return cls(wc_tracked=True, p2_info=True)
 
     @classmethod
     def new_possibly_dirty(cls):
         """constructor to help legacy API to build a new "possibly_dirty" item
 
         Should eventually be removed
         """
-        instance = cls()
-        instance._wc_tracked = True
-        instance._p1_tracked = True
-        instance._possibly_dirty = True
-        return instance
+        return cls(wc_tracked=True, p1_tracked=True)
 
     @classmethod
     def new_normal(cls, mode, size, mtime):
         """constructor to help legacy API to build a new "normal" item
 
         Should eventually be removed
         """
         assert size != FROM_P2
         assert size != NONNORMAL
-        instance = cls()
-        instance._wc_tracked = True
-        instance._p1_tracked = True
-        instance._mode = mode
-        instance._size = size
-        instance._mtime = mtime
-        return instance
+        return cls(
+            wc_tracked=True,
+            p1_tracked=True,
+            parentfiledata=(mode, size, mtime),
+        )
 
     @classmethod
     def from_v1_data(cls, state, mode, size, mtime):
         """Build a new DirstateItem object from V1 data
 
         Since the dirstate-v1 format is frozen, the signature of this function
         is not expected to change, unlike the __init__ one.
         """
         if state == b'm':
             return cls.new_merged()
         elif state == b'a':
             return cls.new_added()
         elif state == b'r':
-            instance = cls()
-            instance._wc_tracked = False
             if size == NONNORMAL:
-                instance._merged = True
-                instance._p1_tracked = (
-                    True  # might not be True because of rename ?
-                )
-                instance._p2_tracked = (
-                    True  # might not be True because of rename ?
-                )
+                p1_tracked = True
+                p2_info = True
             elif size == FROM_P2:
-                instance._clean_p2 = True
-                instance._p1_tracked = (
-                    False  # We actually don't know (file history)
-                )
-                instance._p2_tracked = True
+                p1_tracked = False
+                p2_info = True
             else:
-                instance._p1_tracked = True
-            return instance
+                p1_tracked = True
+                p2_info = False
+            return cls(p1_tracked=p1_tracked, p2_info=p2_info)
         elif state == b'n':
             if size == FROM_P2:
                 return cls.new_from_p2()
             elif size == NONNORMAL:
                 return cls.new_possibly_dirty()
             elif mtime == AMBIGUOUS_TIME:
                 instance = cls.new_normal(mode, size, 42)
                 instance._mtime = None
-                instance._possibly_dirty = True
                 return instance
             else:
                 return cls.new_normal(mode, size, mtime)
         else:
             raise RuntimeError(b'unknown state: %s' % state)
 
     def set_possibly_dirty(self):
         """Mark a file as "possibly dirty"
 
         This means the next status call will have to actually check its content
         to make sure it is correct.
         """
-        self._possibly_dirty = True
+        self._mtime = None
 
     def set_clean(self, mode, size, mtime):
         """mark a file as "clean" cancelling potential "possibly dirty call"
 
         Note: this function is a descendant of `dirstate.normal` and is
         currently expected to be call on "normal" entry only. There are not
         reason for this to not change in the future as long as the ccode is
         updated to preserve the proper state of the non-normal files.
         """
         self._wc_tracked = True
         self._p1_tracked = True
-        self._p2_tracked = False  # this might be wrong
-        self._merged = False
-        self._clean_p2 = False
-        self._possibly_dirty = False
         self._mode = mode
         self._size = size
         self._mtime = mtime
 
     def set_tracked(self):
         """mark a file as tracked in the working copy
 
         This will ultimately be called by command like `hg add`.
         """
         self._wc_tracked = True
-        # `set_tracked` is replacing various `normallookup` call. So we set
-        # "possibly dirty" to stay on the safe side.
+        # `set_tracked` is replacing various `normallookup` call. So we mark
+        # the files as needing lookup
         #
         # Consider dropping this in the future in favor of something less broad.
-        self._possibly_dirty = True
+        self._mtime = None
 
     def set_untracked(self):
         """mark a file as untracked in the working copy
 
         This will ultimately be called by command like `hg remove`.
         """
         self._wc_tracked = False
         self._mode = None
         self._size = None
         self._mtime = None
 
     def drop_merge_data(self):
         """remove all "merge-only" from a DirstateItem
 
         This is to be call by the dirstatemap code when the second parent is dropped
         """
-        if not (self.merged or self.from_p2):
-            return
-        self._p1_tracked = self.merged  # why is this not already properly set ?
-
-        self._merged = False
-        self._clean_p1 = False
-        self._clean_p2 = False
-        self._p2_tracked = False
-        self._possibly_dirty = True
+        if self._p2_info:
+            self._p2_info = False
         self._mode = None
         self._size = None
         self._mtime = None
 
     @property
     def mode(self):
         return self.v1_mode()
 
     @property
     def size(self):
         return self.v1_size()
 
     @property
     def mtime(self):
         return self.v1_mtime()
 
     @property
     def state(self):
         """
         States are:
           n  normal
           m  needs merging
           r  marked for removal
           a  marked for addition
 
         XXX This "state" is a bit obscure and mostly a direct expression of the
         dirstatev1 format. It would make sense to ultimately deprecate it in
         favor of the more "semantic" attributes.
         """
         if not self.any_tracked:
             return b'?'
         return self.v1_state()
 
     @property
     def tracked(self):
         """True is the file is tracked in the working copy"""
         return self._wc_tracked
 
     @property
     def any_tracked(self):
         """True is the file is tracked anywhere (wc or parents)"""
-        return self._wc_tracked or self._p1_tracked or self._p2_tracked
+        return self._wc_tracked or self._p1_tracked or self._p2_info
 
     @property
     def added(self):
         """True if the file has been added"""
-        return self._wc_tracked and not (self._p1_tracked or self._p2_tracked)
+        return self._wc_tracked and not (self._p1_tracked or self._p2_info)
 
     @property
     def maybe_clean(self):
         """True if the file has a chance to be in the "clean" state"""
         if not self._wc_tracked:
             return False
-        elif self.added:
+        elif not self._p1_tracked:
             return False
-        elif self._merged:
-            return False
-        elif self._clean_p2:
+        elif self._p2_info:
             return False
         return True
 
     @property
     def merged(self):
         """True if the file has been merged
 
         Should only be set if a merge is in progress in the dirstate
         """
-        return self._wc_tracked and self._merged
+        return self._wc_tracked and self._p1_tracked and self._p2_info
 
     @property
     def from_p2(self):
         """True if the file have been fetched from p2 during the current merge
 
         This is only True is the file is currently tracked.
 
         Should only be set if a merge is in progress in the dirstate
         """
-        if not self._wc_tracked:
-            return False
-        return self._clean_p2
+        return self._wc_tracked and (not self._p1_tracked) and self._p2_info
 
     @property
     def removed(self):
         """True if the file has been removed"""
-        return not self._wc_tracked and (self._p1_tracked or self._p2_tracked)
+        return not self._wc_tracked and (self._p1_tracked or self._p2_info)
 
     def v1_state(self):
         """return a "state" suitable for v1 serialization"""
-        if not (self._p1_tracked or self._p2_tracked or self._wc_tracked):
+        if not self.any_tracked:
             # the object has no state to record, this is -currently-
             # unsupported
             raise RuntimeError('untracked item')
         elif self.removed:
             return b'r'
         elif self.merged:
             return b'm'
         elif self.added:
             return b'a'
         else:
             return b'n'
 
     def v1_mode(self):
         """return a "mode" suitable for v1 serialization"""
         return self._mode if self._mode is not None else 0
 
     def v1_size(self):
         """return a "size" suitable for v1 serialization"""
         if not self.any_tracked:
             # the object has no state to record, this is -currently-
             # unsupported
             raise RuntimeError('untracked item')
-        elif self.removed and self._merged:
+        elif self.removed and self._p1_tracked and self._p2_info:
             return NONNORMAL
-        elif self.removed and self._clean_p2:
+        elif self.removed and self._p2_info:
             return FROM_P2
         elif self.removed:
             return 0
         elif self.merged:
             return FROM_P2
         elif self.added:
             return NONNORMAL
         elif self.from_p2:
             return FROM_P2
-        elif self._possibly_dirty:
-            return self._size if self._size is not None else NONNORMAL
+        elif self._size is None:
+            return NONNORMAL
         else:
             return self._size
 
     def v1_mtime(self):
         """return a "mtime" suitable for v1 serialization"""
         if not self.any_tracked:
             # the object has no state to record, this is -currently-
             # unsupported
             raise RuntimeError('untracked item')
         elif self.removed:
             return 0
-        elif self._possibly_dirty:
-            return AMBIGUOUS_TIME
-        elif self.merged:
+        elif self._mtime is None:
             return AMBIGUOUS_TIME
-        elif self.added:
+        elif self._p2_info:
             return AMBIGUOUS_TIME
-        elif self.from_p2:
+        elif not self._p1_tracked:
             return AMBIGUOUS_TIME
         else:
-            return self._mtime if self._mtime is not None else 0
+            return self._mtime
 
     def need_delay(self, now):
         """True if the stored mtime would be ambiguous with the current time"""
         return self.v1_state() == b'n' and self.v1_mtime() == now
 
 
 def gettype(q):
     return int(q & 0xFFFF)
 
 
 class BaseIndexObject(object):
     # Can I be passed to an algorithme implemented in Rust ?
     rust_ext_compat = 0
     # Format of an index entry according to Python's `struct` language
     index_format = revlog_constants.INDEX_ENTRY_V1
     # Size of a C unsigned long long int, platform independent
     big_int_size = struct.calcsize(b'>Q')
     # Size of a C long int, platform independent
     int_size = struct.calcsize(b'>i')
     # An empty index entry, used as a default value to be overridden, or nullrev
     null_item = (
         0,
         0,
         0,
         -1,
         -1,
         -1,
         -1,
         sha1nodeconstants.nullid,
         0,
         0,
         revlog_constants.COMP_MODE_INLINE,
         revlog_constants.COMP_MODE_INLINE,
     )
 
     @util.propertycache
     def entry_size(self):
         return self.index_format.size
 
     @property
     def nodemap(self):
         msg = b"index.nodemap is deprecated, use index.[has_node|rev|get_rev]"
         util.nouideprecwarn(msg, b'5.3', stacklevel=2)
         return self._nodemap
 
     @util.propertycache
     def _nodemap(self):
         nodemap = nodemaputil.NodeMap({sha1nodeconstants.nullid: nullrev})
         for r in range(0, len(self)):
             n = self[r][7]
             nodemap[n] = r
         return nodemap
 
     def has_node(self, node):
         """return True if the node exist in the index"""
         return node in self._nodemap
 
     def rev(self, node):
         """return a revision for a node
 
         If the node is unknown, raise a RevlogError"""
         return self._nodemap[node]
 
     def get_rev(self, node):
         """return a revision for a node
 
         If the node is unknown, return None"""
         return self._nodemap.get(node)
 
     def _stripnodes(self, start):
         if '_nodemap' in vars(self):
             for r in range(start, len(self)):
                 n = self[r][7]
                 del self._nodemap[n]
 
     def clearcaches(self):
         self.__dict__.pop('_nodemap', None)
 
     def __len__(self):
         return self._lgt + len(self._extra)
 
     def append(self, tup):
         if '_nodemap' in vars(self):
             self._nodemap[tup[7]] = len(self)
         data = self._pack_entry(len(self), tup)
         self._extra.append(data)
 
     def _pack_entry(self, rev, entry):
         assert entry[8] == 0
         assert entry[9] == 0
         return self.index_format.pack(*entry[:8])
 
     def _check_index(self, i):
         if not isinstance(i, int):
             raise TypeError(b"expecting int indexes")
         if i < 0 or i >= len(self):
             raise IndexError
 
     def __getitem__(self, i):
         if i == -1:
             return self.null_item
         self._check_index(i)
         if i >= self._lgt:
             data = self._extra[i - self._lgt]
         else:
             index = self._calculate_index(i)
             data = self._data[index : index + self.entry_size]
         r = self._unpack_entry(i, data)
         if self._lgt and i == 0:
             offset = revlogutils.offset_type(0, gettype(r[0]))
             r = (offset,) + r[1:]
         return r
 
     def _unpack_entry(self, rev, data):
         r = self.index_format.unpack(data)
         r = r + (
             0,
             0,
             revlog_constants.COMP_MODE_INLINE,
             revlog_constants.COMP_MODE_INLINE,
         )
         return r
 
     def pack_header(self, header):
         """pack header information as binary"""
         v_fmt = revlog_constants.INDEX_HEADER
         return v_fmt.pack(header)
 
     def entry_binary(self, rev):
         """return the raw binary string representing a revision"""
         entry = self[rev]
         p = revlog_constants.INDEX_ENTRY_V1.pack(*entry[:8])
         if rev == 0:
             p = p[revlog_constants.INDEX_HEADER.size :]
         return p
 
 
 class IndexObject(BaseIndexObject):
     def __init__(self, data):
         assert len(data) % self.entry_size == 0, (
             len(data),
             self.entry_size,
             len(data) % self.entry_size,
         )
         self._data = data
         self._lgt = len(data) // self.entry_size
         self._extra = []
 
     def _calculate_index(self, i):
         return i * self.entry_size
 
     def __delitem__(self, i):
         if not isinstance(i, slice) or not i.stop == -1 or i.step is not None:
             raise ValueError(b"deleting slices only supports a:-1 with step 1")
         i = i.start
         self._check_index(i)
         self._stripnodes(i)
         if i < self._lgt:
             self._data = self._data[: i * self.entry_size]
             self._lgt = i
             self._extra = []
         else:
             self._extra = self._extra[: i - self._lgt]
 
 
 class PersistentNodeMapIndexObject(IndexObject):
     """a Debug oriented class to test persistent nodemap
 
     We need a simple python object to test API and higher level behavior. See
     the Rust implementation for  more serious usage. This should be used only
     through the dedicated `devel.persistent-nodemap` config.
     """
 
     def nodemap_data_all(self):
         """Return bytes containing a full serialization of a nodemap
 
         The nodemap should be valid for the full set of revisions in the
         index."""
         return nodemaputil.persistent_data(self)
 
     def nodemap_data_incremental(self):
         """Return bytes containing a incremental update to persistent nodemap
 
         This containst the data for an append-only update of the data provided
         in the last call to `update_nodemap_data`.
         """
         if self._nm_root is None:
             return None
         docket = self._nm_docket
         changed, data = nodemaputil.update_persistent_data(
             self, self._nm_root, self._nm_max_idx, self._nm_docket.tip_rev
         )
 
         self._nm_root = self._nm_max_idx = self._nm_docket = None
         return docket, changed, data
 
     def update_nodemap_data(self, docket, nm_data):
         """provide full block of persisted binary data for a nodemap
 
         The data are expected to come from disk. See `nodemap_data_all` for a
         produceur of such data."""
         if nm_data is not None:
             self._nm_root, self._nm_max_idx = nodemaputil.parse_data(nm_data)
             if self._nm_root:
                 self._nm_docket = docket
             else:
                 self._nm_root = self._nm_max_idx = self._nm_docket = None
 
 
 class InlinedIndexObject(BaseIndexObject):
     def __init__(self, data, inline=0):
         self._data = data
         self._lgt = self._inline_scan(None)
         self._inline_scan(self._lgt)
         self._extra = []
 
     def _inline_scan(self, lgt):
         off = 0
         if lgt is not None:
             self._offsets = [0] * lgt
         count = 0
         while off <= len(self._data) - self.entry_size:
             start = off + self.big_int_size
             (s,) = struct.unpack(
                 b'>i',
                 self._data[start : start + self.int_size],
             )
             if lgt is not None:
                 self._offsets[count] = off
             count += 1
             off += self.entry_size + s
         if off != len(self._data):
             raise ValueError(b"corrupted data")
         return count
 
     def __delitem__(self, i):
         if not isinstance(i, slice) or not i.stop == -1 or i.step is not None:
             raise ValueError(b"deleting slices only supports a:-1 with step 1")
         i = i.start
         self._check_index(i)
         self._stripnodes(i)
         if i < self._lgt:
             self._offsets = self._offsets[:i]
             self._lgt = i
             self._extra = []
         else:
             self._extra = self._extra[: i - self._lgt]
 
     def _calculate_index(self, i):
         return self._offsets[i]
 
 
 def parse_index2(data, inline, revlogv2=False):
     if not inline:
         cls = IndexObject2 if revlogv2 else IndexObject
         return cls(data), None
     cls = InlinedIndexObject
     return cls(data, inline), (0, data)
 
 
 def parse_index_cl_v2(data):
     return IndexChangelogV2(data), None
 
 
 class IndexObject2(IndexObject):
     index_format = revlog_constants.INDEX_ENTRY_V2
 
     def replace_sidedata_info(
         self,
         rev,
         sidedata_offset,
         sidedata_length,
         offset_flags,
         compression_mode,
     ):
         """
         Replace an existing index entry's sidedata offset and length with new
         ones.
         This cannot be used outside of the context of sidedata rewriting,
         inside the transaction that creates the revision `rev`.
         """
         if rev < 0:
             raise KeyError
         self._check_index(rev)
         if rev < self._lgt:
             msg = b"cannot rewrite entries outside of this transaction"
             raise KeyError(msg)
         else:
             entry = list(self[rev])
             entry[0] = offset_flags
             entry[8] = sidedata_offset
             entry[9] = sidedata_length
             entry[11] = compression_mode
             entry = tuple(entry)
             new = self._pack_entry(rev, entry)
             self._extra[rev - self._lgt] = new
 
     def _unpack_entry(self, rev, data):
         data = self.index_format.unpack(data)
         entry = data[:10]
         data_comp = data[10] & 3
         sidedata_comp = (data[10] & (3 << 2)) >> 2
         return entry + (data_comp, sidedata_comp)
 
     def _pack_entry(self, rev, entry):
         data = entry[:10]
         data_comp = entry[10] & 3
         sidedata_comp = (entry[11] & 3) << 2
         data += (data_comp | sidedata_comp,)
 
         return self.index_format.pack(*data)
 
     def entry_binary(self, rev):
         """return the raw binary string representing a revision"""
         entry = self[rev]
         return self._pack_entry(rev, entry)
 
     def pack_header(self, header):
         """pack header information as binary"""
         msg = 'version header should go in the docket, not the index: %d'
         msg %= header
         raise error.ProgrammingError(msg)
 
 
 class IndexChangelogV2(IndexObject2):
     index_format = revlog_constants.INDEX_ENTRY_CL_V2
 
     def _unpack_entry(self, rev, data, r=True):
         items = self.index_format.unpack(data)
         entry = items[:3] + (rev, rev) + items[3:8]
         data_comp = items[8] & 3
         sidedata_comp = (items[8] >> 2) & 3
         return entry + (data_comp, sidedata_comp)
 
     def _pack_entry(self, rev, entry):
         assert entry[3] == rev, entry[3]
         assert entry[4] == rev, entry[4]
         data = entry[:3] + entry[5:10]
         data_comp = entry[10] & 3
         sidedata_comp = (entry[11] & 3) << 2
         data += (data_comp | sidedata_comp,)
         return self.index_format.pack(*data)
 
 
 def parse_index_devel_nodemap(data, inline):
     """like parse_index2, but alway return a PersistentNodeMapIndexObject"""
     return PersistentNodeMapIndexObject(data), None
 
 
 def parse_dirstate(dmap, copymap, st):
     parents = [st[:20], st[20:40]]
     # dereference fields so they will be local in loop
     format = b">cllll"
     e_size = struct.calcsize(format)
     pos1 = 40
     l = len(st)
 
     # the inner loop
     while pos1 < l:
         pos2 = pos1 + e_size
         e = _unpack(b">cllll", st[pos1:pos2])  # a literal here is faster
         pos1 = pos2 + e[4]
         f = st[pos2:pos1]
         if b'\0' in f:
             f, c = f.split(b'\0')
             copymap[f] = c
         dmap[f] = DirstateItem.from_v1_data(*e[:4])
     return parents
 
 
 def pack_dirstate(dmap, copymap, pl, now):
     now = int(now)
     cs = stringio()
     write = cs.write
     write(b"".join(pl))
     for f, e in pycompat.iteritems(dmap):
         if e.need_delay(now):
             # The file was last modified "simultaneously" with the current
             # write to dirstate (i.e. within the same second for file-
             # systems with a granularity of 1 sec). This commonly happens
             # for at least a couple of files on 'update'.
             # The user could change the file without changing its size
             # within the same second. Invalidate the file's mtime in
             # dirstate, forcing future 'status' calls to compare the
             # contents of the file if the size is the same. This prevents
             # mistakenly treating such files as clean.
             e.set_possibly_dirty()
 
         if f in copymap:
             f = b"%s\0%s" % (f, copymap[f])
         e = _pack(
             b">cllll",
             e.v1_state(),
             e.v1_mode(),
             e.v1_size(),
             e.v1_mtime(),
             len(f),
         )
         write(e)
         write(f)
     return cs.getvalue()

rust/hg-core/src/dirstate/entry.rs

@@ -1,427 +1,413
 use crate::errors::HgError;
 use bitflags::bitflags;
 use std::convert::TryFrom;
 
 #[derive(Copy, Clone, Debug, Eq, PartialEq)]
 pub enum EntryState {
     Normal,
     Added,
     Removed,
     Merged,
 }
 
 /// The C implementation uses all signed types. This will be an issue
 /// either when 4GB+ source files are commonplace or in 2038, whichever
 /// comes first.
 #[derive(Debug, PartialEq, Copy, Clone)]
 pub struct DirstateEntry {
     flags: Flags,
-    mode: i32,
-    size: i32,
-    mtime: i32,
+    mode_size: Option<(i32, i32)>,
+    mtime: Option<i32>,
 }
 
 bitflags! {
-    pub struct Flags: u8 {
+    struct Flags: u8 {
         const WDIR_TRACKED = 1 << 0;
         const P1_TRACKED = 1 << 1;
-        const P2_TRACKED = 1 << 2;
-        const POSSIBLY_DIRTY = 1 << 3;
-        const MERGED = 1 << 4;
-        const CLEAN_P1 = 1 << 5;
-        const CLEAN_P2 = 1 << 6;
-        const ENTRYLESS_TREE_NODE = 1 << 7;
+        const P2_INFO = 1 << 2;
     }
 }
 
 pub const V1_RANGEMASK: i32 = 0x7FFFFFFF;
 
 pub const MTIME_UNSET: i32 = -1;
 
 /// A `DirstateEntry` with a size of `-2` means that it was merged from the
 /// other parent. This allows revert to pick the right status back during a
 /// merge.
 pub const SIZE_FROM_OTHER_PARENT: i32 = -2;
 /// A special value used for internal representation of special case in
 /// dirstate v1 format.
 pub const SIZE_NON_NORMAL: i32 = -1;
 
 impl DirstateEntry {
     pub fn new(
-        flags: Flags,
-        mode_size_mtime: Option<(i32, i32, i32)>,
+        wdir_tracked: bool,
+        p1_tracked: bool,
+        p2_info: bool,
+        mode_size: Option<(i32, i32)>,
+        mtime: Option<i32>,
     ) -> Self {
-        let (mode, size, mtime) =
-            mode_size_mtime.unwrap_or((0, SIZE_NON_NORMAL, MTIME_UNSET));
+        let mut flags = Flags::empty();
+        flags.set(Flags::WDIR_TRACKED, wdir_tracked);
+        flags.set(Flags::P1_TRACKED, p1_tracked);
+        flags.set(Flags::P2_INFO, p2_info);
         Self {
             flags,
-            mode,
-            size,
+            mode_size,
             mtime,
         }
     }
 
     pub fn from_v1_data(
         state: EntryState,
         mode: i32,
         size: i32,
         mtime: i32,
     ) -> Self {
         match state {
             EntryState::Normal => {
                 if size == SIZE_FROM_OTHER_PARENT {
                     Self::new_from_p2()
                 } else if size == SIZE_NON_NORMAL {
                     Self::new_possibly_dirty()
                 } else if mtime == MTIME_UNSET {
                     Self {
-                        flags: Flags::WDIR_TRACKED
-                            | Flags::P1_TRACKED
-                            | Flags::POSSIBLY_DIRTY,
-                        mode,
-                        size,
-                        mtime: 0,
+                        flags: Flags::WDIR_TRACKED | Flags::P1_TRACKED,
+                        mode_size: Some((mode, size)),
+                        mtime: None,
                     }
                 } else {
                     Self::new_normal(mode, size, mtime)
                 }
             }
             EntryState::Added => Self::new_added(),
             EntryState::Removed => Self {
                 flags: if size == SIZE_NON_NORMAL {
-                    Flags::P1_TRACKED // might not be true because of rename ?
-                    | Flags::P2_TRACKED // might not be true because of rename ?
-                    | Flags::MERGED
+                    Flags::P1_TRACKED | Flags::P2_INFO
                 } else if size == SIZE_FROM_OTHER_PARENT {
                     // We don’t know if P1_TRACKED should be set (file history)
-                    Flags::P2_TRACKED | Flags::CLEAN_P2
+                    Flags::P2_INFO
                 } else {
                     Flags::P1_TRACKED
                 },
-                mode: 0,
-                size: 0,
-                mtime: 0,
+                mode_size: None,
+                mtime: None,
             },
             EntryState::Merged => Self::new_merged(),
         }
     }
 
     pub fn new_from_p2() -> Self {
         Self {
             // might be missing P1_TRACKED
-            flags: Flags::WDIR_TRACKED | Flags::P2_TRACKED | Flags::CLEAN_P2,
-            mode: 0,
-            size: SIZE_FROM_OTHER_PARENT,
-            mtime: MTIME_UNSET,
+            flags: Flags::WDIR_TRACKED | Flags::P2_INFO,
+            mode_size: None,
+            mtime: None,
         }
     }
 
     pub fn new_possibly_dirty() -> Self {
         Self {
-            flags: Flags::WDIR_TRACKED
-                | Flags::P1_TRACKED
-                | Flags::POSSIBLY_DIRTY,
-            mode: 0,
-            size: SIZE_NON_NORMAL,
-            mtime: MTIME_UNSET,
+            flags: Flags::WDIR_TRACKED | Flags::P1_TRACKED,
+            mode_size: None,
+            mtime: None,
         }
     }
 
     pub fn new_added() -> Self {
         Self {
             flags: Flags::WDIR_TRACKED,
-            mode: 0,
-            size: SIZE_NON_NORMAL,
-            mtime: MTIME_UNSET,
+            mode_size: None,
+            mtime: None,
         }
     }
 
     pub fn new_merged() -> Self {
         Self {
             flags: Flags::WDIR_TRACKED
                 | Flags::P1_TRACKED // might not be true because of rename ?
-                | Flags::P2_TRACKED // might not be true because of rename ?
-                | Flags::MERGED,
-            mode: 0,
-            size: SIZE_NON_NORMAL,
-            mtime: MTIME_UNSET,
+                | Flags::P2_INFO, // might not be true because of rename ?
+            mode_size: None,
+            mtime: None,
         }
     }
 
     pub fn new_normal(mode: i32, size: i32, mtime: i32) -> Self {
         Self {
             flags: Flags::WDIR_TRACKED | Flags::P1_TRACKED,
-            mode,
-            size,
-            mtime,
+            mode_size: Some((mode, size)),
+            mtime: Some(mtime),
         }
     }
 
     /// Creates a new entry in "removed" state.
     ///
     /// `size` is expected to be zero, `SIZE_NON_NORMAL`, or
     /// `SIZE_FROM_OTHER_PARENT`
     pub fn new_removed(size: i32) -> Self {
         Self::from_v1_data(EntryState::Removed, 0, size, 0)
     }
 
     pub fn tracked(&self) -> bool {
         self.flags.contains(Flags::WDIR_TRACKED)
     }
 
-    fn tracked_in_any_parent(&self) -> bool {
-        self.flags.intersects(Flags::P1_TRACKED | Flags::P2_TRACKED)
+    fn in_either_parent(&self) -> bool {
+        self.flags.intersects(Flags::P1_TRACKED | Flags::P2_INFO)
     }
 
     pub fn removed(&self) -> bool {
-        self.tracked_in_any_parent()
-            && !self.flags.contains(Flags::WDIR_TRACKED)
+        self.in_either_parent() && !self.flags.contains(Flags::WDIR_TRACKED)
     }
 
     pub fn merged(&self) -> bool {
-        self.flags.contains(Flags::WDIR_TRACKED | Flags::MERGED)
+        self.flags
+            .contains(Flags::WDIR_TRACKED | Flags::P1_TRACKED | Flags::P2_INFO)
     }
 
     pub fn added(&self) -> bool {
-        self.flags.contains(Flags::WDIR_TRACKED)
-            && !self.tracked_in_any_parent()
+        self.flags.contains(Flags::WDIR_TRACKED) && !self.in_either_parent()
     }
 
     pub fn from_p2(&self) -> bool {
-        self.flags.contains(Flags::WDIR_TRACKED | Flags::CLEAN_P2)
+        self.flags.contains(Flags::WDIR_TRACKED | Flags::P2_INFO)
+            && !self.flags.contains(Flags::P1_TRACKED)
     }
 
     pub fn maybe_clean(&self) -> bool {
         if !self.flags.contains(Flags::WDIR_TRACKED) {
             false
-        } else if self.added() {
+        } else if !self.flags.contains(Flags::P1_TRACKED) {
             false
-        } else if self.flags.contains(Flags::MERGED) {
-            false
-        } else if self.flags.contains(Flags::CLEAN_P2) {
+        } else if self.flags.contains(Flags::P2_INFO) {
             false
         } else {
             true
         }
     }
 
     pub fn any_tracked(&self) -> bool {
         self.flags.intersects(
-            Flags::WDIR_TRACKED | Flags::P1_TRACKED | Flags::P2_TRACKED,
+            Flags::WDIR_TRACKED | Flags::P1_TRACKED | Flags::P2_INFO,
         )
     }
 
-    pub fn state(&self) -> EntryState {
+    fn v1_state(&self) -> EntryState {
+        if !self.any_tracked() {
+            // TODO: return an Option instead?
+            panic!("Accessing v1_state of an untracked DirstateEntry")
+        }
         if self.removed() {
             EntryState::Removed
         } else if self.merged() {
             EntryState::Merged
         } else if self.added() {
             EntryState::Added
         } else {
             EntryState::Normal
         }
     }
 
-    pub fn mode(&self) -> i32 {
-        self.mode
+    fn v1_mode(&self) -> i32 {
+        if let Some((mode, _size)) = self.mode_size {
+            mode
+        } else {
+            0
+        }
     }
 
-    pub fn size(&self) -> i32 {
-        if self.removed() && self.flags.contains(Flags::MERGED) {
+    fn v1_size(&self) -> i32 {
+        if !self.any_tracked() {
+            // TODO: return an Option instead?
+            panic!("Accessing v1_size of an untracked DirstateEntry")
+        }
+        if self.removed()
+            && self.flags.contains(Flags::P1_TRACKED | Flags::P2_INFO)
+        {
             SIZE_NON_NORMAL
-        } else if self.removed() && self.flags.contains(Flags::CLEAN_P2) {
+        } else if self.removed() && self.flags.contains(Flags::P2_INFO) {
             SIZE_FROM_OTHER_PARENT
         } else if self.removed() {
             0
         } else if self.merged() {
             SIZE_FROM_OTHER_PARENT
         } else if self.added() {
             SIZE_NON_NORMAL
         } else if self.from_p2() {
             SIZE_FROM_OTHER_PARENT
-        } else if self.flags.contains(Flags::POSSIBLY_DIRTY) {
-            self.size // TODO: SIZE_NON_NORMAL ?
+        } else if let Some((_mode, size)) = self.mode_size {
+            size
         } else {
-            self.size
+            SIZE_NON_NORMAL
         }
     }
 
-    pub fn mtime(&self) -> i32 {
+    fn v1_mtime(&self) -> i32 {
+        if !self.any_tracked() {
+            // TODO: return an Option instead?
+            panic!("Accessing v1_mtime of an untracked DirstateEntry")
+        }
         if self.removed() {
             0
-        } else if self.flags.contains(Flags::POSSIBLY_DIRTY) {
-            MTIME_UNSET
-        } else if self.merged() {
+        } else if self.flags.contains(Flags::P2_INFO) {
             MTIME_UNSET
-        } else if self.added() {
-            MTIME_UNSET
-        } else if self.from_p2() {
+        } else if !self.flags.contains(Flags::P1_TRACKED) {
             MTIME_UNSET
         } else {
-            self.mtime
+            self.mtime.unwrap_or(MTIME_UNSET)
+        }
+    }
+
+    // TODO: return `Option<EntryState>`? None when `!self.any_tracked`
+    pub fn state(&self) -> EntryState {
+        self.v1_state()
         }
+
+    // TODO: return Option?
+    pub fn mode(&self) -> i32 {
+        self.v1_mode()
+    }
+
+    // TODO: return Option?
+    pub fn size(&self) -> i32 {
+        self.v1_size()
+    }
+
+    // TODO: return Option?
+    pub fn mtime(&self) -> i32 {
+        self.v1_mtime()
     }
 
     pub fn drop_merge_data(&mut self) {
-        if self.flags.contains(Flags::CLEAN_P1)
-            || self.flags.contains(Flags::CLEAN_P2)
-            || self.flags.contains(Flags::MERGED)
-            || self.flags.contains(Flags::P2_TRACKED)
-        {
-            if self.flags.contains(Flags::MERGED) {
-                self.flags.insert(Flags::P1_TRACKED);
-            } else {
-                self.flags.remove(Flags::P1_TRACKED);
-            }
-            self.flags.remove(
-                Flags::MERGED
-                    | Flags::CLEAN_P1
-                    | Flags::CLEAN_P2
-                    | Flags::P2_TRACKED,
-            );
-            self.flags.insert(Flags::POSSIBLY_DIRTY);
-            self.mode = 0;
-            self.mtime = 0;
-            // size = None on the python size turn into size = NON_NORMAL when
-            // accessed. So the next line is currently required, but a some
-            // future clean up would be welcome.
-            self.size = SIZE_NON_NORMAL;
+        if self.flags.contains(Flags::P2_INFO) {
+            self.flags.remove(Flags::P2_INFO);
+            self.mode_size = None;
+            self.mtime = None;
         }
     }
 
     pub fn set_possibly_dirty(&mut self) {
-        self.flags.insert(Flags::POSSIBLY_DIRTY)
+        self.mtime = None
     }
 
     pub fn set_clean(&mut self, mode: i32, size: i32, mtime: i32) {
         self.flags.insert(Flags::WDIR_TRACKED | Flags::P1_TRACKED);
-        self.flags.remove(
-            Flags::P2_TRACKED // This might be wrong
-                | Flags::MERGED
-                | Flags::CLEAN_P2
-                | Flags::POSSIBLY_DIRTY,
-        );
-        self.mode = mode;
-        self.size = size;
-        self.mtime = mtime;
+        self.mode_size = Some((mode, size));
+        self.mtime = Some(mtime);
     }
 
     pub fn set_tracked(&mut self) {
-        self.flags
-            .insert(Flags::WDIR_TRACKED | Flags::POSSIBLY_DIRTY);
-        // size = None on the python size turn into size = NON_NORMAL when
-        // accessed. So the next line is currently required, but a some future
-        // clean up would be welcome.
-        self.size = SIZE_NON_NORMAL;
+        self.flags.insert(Flags::WDIR_TRACKED);
+        // `set_tracked` is replacing various `normallookup` call. So we mark
+        // the files as needing lookup
+        //
+        // Consider dropping this in the future in favor of something less
+        // broad.
+        self.mtime = None;
     }
 
     pub fn set_untracked(&mut self) {
         self.flags.remove(Flags::WDIR_TRACKED);
-        self.mode = 0;
-        self.size = 0;
-        self.mtime = 0;
+        self.mode_size = None;
+        self.mtime = None;
     }
 
     /// Returns `(state, mode, size, mtime)` for the puprose of serialization
     /// in the dirstate-v1 format.
     ///
     /// This includes marker values such as `mtime == -1`. In the future we may
     /// want to not represent these cases that way in memory, but serialization
     /// will need to keep the same format.
     pub fn v1_data(&self) -> (u8, i32, i32, i32) {
-        (self.state().into(), self.mode(), self.size(), self.mtime())
+        (
+            self.v1_state().into(),
+            self.v1_mode(),
+            self.v1_size(),
+            self.v1_mtime(),
+        )
     }
 
     pub(crate) fn is_from_other_parent(&self) -> bool {
         self.state() == EntryState::Normal
             && self.size() == SIZE_FROM_OTHER_PARENT
     }
 
     // TODO: other platforms
     #[cfg(unix)]
     pub fn mode_changed(
         &self,
         filesystem_metadata: &std::fs::Metadata,
     ) -> bool {
         use std::os::unix::fs::MetadataExt;
         const EXEC_BIT_MASK: u32 = 0o100;
         let dirstate_exec_bit = (self.mode() as u32) & EXEC_BIT_MASK;
         let fs_exec_bit = filesystem_metadata.mode() & EXEC_BIT_MASK;
         dirstate_exec_bit != fs_exec_bit
     }
 
     /// Returns a `(state, mode, size, mtime)` tuple as for
     /// `DirstateMapMethods::debug_iter`.
     pub fn debug_tuple(&self) -> (u8, i32, i32, i32) {
-        let state = if self.flags.contains(Flags::ENTRYLESS_TREE_NODE) {
-            b' '
-        } else {
-            self.state().into()
-        };
-        (state, self.mode(), self.size(), self.mtime())
+        (self.state().into(), self.mode(), self.size(), self.mtime())
     }
 
     pub fn mtime_is_ambiguous(&self, now: i32) -> bool {
         self.state() == EntryState::Normal && self.mtime() == now
     }
 
     pub fn clear_ambiguous_mtime(&mut self, now: i32) -> bool {
         let ambiguous = self.mtime_is_ambiguous(now);
         if ambiguous {
             // The file was last modified "simultaneously" with the current
             // write to dirstate (i.e. within the same second for file-
             // systems with a granularity of 1 sec). This commonly happens
             // for at least a couple of files on 'update'.
             // The user could change the file without changing its size
             // within the same second. Invalidate the file's mtime in
             // dirstate, forcing future 'status' calls to compare the
             // contents of the file if the size is the same. This prevents
             // mistakenly treating such files as clean.
-            self.clear_mtime()
+            self.set_possibly_dirty()
         }
         ambiguous
     }
-
-    pub fn clear_mtime(&mut self) {
-        self.mtime = -1;
-    }
 }
 
 impl EntryState {
     pub fn is_tracked(self) -> bool {
         use EntryState::*;
         match self {
             Normal | Added | Merged => true,
             Removed => false,
         }
     }
 }
 
 impl TryFrom<u8> for EntryState {
     type Error = HgError;
 
     fn try_from(value: u8) -> Result<Self, Self::Error> {
         match value {
             b'n' => Ok(EntryState::Normal),
             b'a' => Ok(EntryState::Added),
             b'r' => Ok(EntryState::Removed),
             b'm' => Ok(EntryState::Merged),
             _ => Err(HgError::CorruptedRepository(format!(
                 "Incorrect dirstate entry state {}",
                 value
             ))),
         }
     }
 }
 
 impl Into<u8> for EntryState {
     fn into(self) -> u8 {
         match self {
             EntryState::Normal => b'n',
             EntryState::Added => b'a',
             EntryState::Removed => b'r',
             EntryState::Merged => b'm',
         }
     }
 }

rust/hg-core/src/dirstate_tree/dirstate_map.rs

@@ -1,1193 +1,1193
 use bytes_cast::BytesCast;
 use micro_timer::timed;
 use std::borrow::Cow;
 use std::convert::TryInto;
 use std::path::PathBuf;
 
 use super::on_disk;
 use super::on_disk::DirstateV2ParseError;
 use super::owning::OwningDirstateMap;
 use super::path_with_basename::WithBasename;
 use crate::dirstate::parsers::pack_entry;
 use crate::dirstate::parsers::packed_entry_size;
 use crate::dirstate::parsers::parse_dirstate_entries;
 use crate::dirstate::parsers::Timestamp;
 use crate::dirstate::CopyMapIter;
 use crate::dirstate::StateMapIter;
 use crate::dirstate::SIZE_FROM_OTHER_PARENT;
 use crate::dirstate::SIZE_NON_NORMAL;
 use crate::matchers::Matcher;
 use crate::utils::hg_path::{HgPath, HgPathBuf};
 use crate::DirstateEntry;
 use crate::DirstateError;
 use crate::DirstateParents;
 use crate::DirstateStatus;
 use crate::EntryState;
 use crate::FastHashMap;
 use crate::PatternFileWarning;
 use crate::StatusError;
 use crate::StatusOptions;
 
 /// Append to an existing data file if the amount of unreachable data (not used
 /// anymore) is less than this fraction of the total amount of existing data.
 const ACCEPTABLE_UNREACHABLE_BYTES_RATIO: f32 = 0.5;
 
 pub struct DirstateMap<'on_disk> {
     /// Contents of the `.hg/dirstate` file
     pub(super) on_disk: &'on_disk [u8],
 
     pub(super) root: ChildNodes<'on_disk>,
 
     /// Number of nodes anywhere in the tree that have `.entry.is_some()`.
     pub(super) nodes_with_entry_count: u32,
 
     /// Number of nodes anywhere in the tree that have
     /// `.copy_source.is_some()`.
     pub(super) nodes_with_copy_source_count: u32,
 
     /// See on_disk::Header
     pub(super) ignore_patterns_hash: on_disk::IgnorePatternsHash,
 
     /// How many bytes of `on_disk` are not used anymore
     pub(super) unreachable_bytes: u32,
 }
 
 /// Using a plain `HgPathBuf` of the full path from the repository root as a
 /// map key would also work: all paths in a given map have the same parent
 /// path, so comparing full paths gives the same result as comparing base
 /// names. However `HashMap` would waste time always re-hashing the same
 /// string prefix.
 pub(super) type NodeKey<'on_disk> = WithBasename<Cow<'on_disk, HgPath>>;
 
 /// Similar to `&'tree Cow<'on_disk, HgPath>`, but can also be returned
 /// for on-disk nodes that don’t actually have a `Cow` to borrow.
 pub(super) enum BorrowedPath<'tree, 'on_disk> {
     InMemory(&'tree HgPathBuf),
     OnDisk(&'on_disk HgPath),
 }
 
 pub(super) enum ChildNodes<'on_disk> {
     InMemory(FastHashMap<NodeKey<'on_disk>, Node<'on_disk>>),
     OnDisk(&'on_disk [on_disk::Node]),
 }
 
 pub(super) enum ChildNodesRef<'tree, 'on_disk> {
     InMemory(&'tree FastHashMap<NodeKey<'on_disk>, Node<'on_disk>>),
     OnDisk(&'on_disk [on_disk::Node]),
 }
 
 pub(super) enum NodeRef<'tree, 'on_disk> {
     InMemory(&'tree NodeKey<'on_disk>, &'tree Node<'on_disk>),
     OnDisk(&'on_disk on_disk::Node),
 }
 
 impl<'tree, 'on_disk> BorrowedPath<'tree, 'on_disk> {
     pub fn detach_from_tree(&self) -> Cow<'on_disk, HgPath> {
         match *self {
             BorrowedPath::InMemory(in_memory) => Cow::Owned(in_memory.clone()),
             BorrowedPath::OnDisk(on_disk) => Cow::Borrowed(on_disk),
         }
     }
 }
 
 impl<'tree, 'on_disk> std::ops::Deref for BorrowedPath<'tree, 'on_disk> {
     type Target = HgPath;
 
     fn deref(&self) -> &HgPath {
         match *self {
             BorrowedPath::InMemory(in_memory) => in_memory,
             BorrowedPath::OnDisk(on_disk) => on_disk,
         }
     }
 }
 
 impl Default for ChildNodes<'_> {
     fn default() -> Self {
         ChildNodes::InMemory(Default::default())
     }
 }
 
 impl<'on_disk> ChildNodes<'on_disk> {
     pub(super) fn as_ref<'tree>(
         &'tree self,
     ) -> ChildNodesRef<'tree, 'on_disk> {
         match self {
             ChildNodes::InMemory(nodes) => ChildNodesRef::InMemory(nodes),
             ChildNodes::OnDisk(nodes) => ChildNodesRef::OnDisk(nodes),
         }
     }
 
     pub(super) fn is_empty(&self) -> bool {
         match self {
             ChildNodes::InMemory(nodes) => nodes.is_empty(),
             ChildNodes::OnDisk(nodes) => nodes.is_empty(),
         }
     }
 
     fn make_mut(
         &mut self,
         on_disk: &'on_disk [u8],
         unreachable_bytes: &mut u32,
     ) -> Result<
         &mut FastHashMap<NodeKey<'on_disk>, Node<'on_disk>>,
         DirstateV2ParseError,
     > {
         match self {
             ChildNodes::InMemory(nodes) => Ok(nodes),
             ChildNodes::OnDisk(nodes) => {
                 *unreachable_bytes +=
                     std::mem::size_of_val::<[on_disk::Node]>(nodes) as u32;
                 let nodes = nodes
                     .iter()
                     .map(|node| {
                         Ok((
                             node.path(on_disk)?,
                             node.to_in_memory_node(on_disk)?,
                         ))
                     })
                     .collect::<Result<_, _>>()?;
                 *self = ChildNodes::InMemory(nodes);
                 match self {
                     ChildNodes::InMemory(nodes) => Ok(nodes),
                     ChildNodes::OnDisk(_) => unreachable!(),
                 }
             }
         }
     }
 }
 
 impl<'tree, 'on_disk> ChildNodesRef<'tree, 'on_disk> {
     pub(super) fn get(
         &self,
         base_name: &HgPath,
         on_disk: &'on_disk [u8],
     ) -> Result<Option<NodeRef<'tree, 'on_disk>>, DirstateV2ParseError> {
         match self {
             ChildNodesRef::InMemory(nodes) => Ok(nodes
                 .get_key_value(base_name)
                 .map(|(k, v)| NodeRef::InMemory(k, v))),
             ChildNodesRef::OnDisk(nodes) => {
                 let mut parse_result = Ok(());
                 let search_result = nodes.binary_search_by(|node| {
                     match node.base_name(on_disk) {
                         Ok(node_base_name) => node_base_name.cmp(base_name),
                         Err(e) => {
                             parse_result = Err(e);
                             // Dummy comparison result, `search_result` won’t
                             // be used since `parse_result` is an error
                             std::cmp::Ordering::Equal
                         }
                     }
                 });
                 parse_result.map(|()| {
                     search_result.ok().map(|i| NodeRef::OnDisk(&nodes[i]))
                 })
             }
         }
     }
 
     /// Iterate in undefined order
     pub(super) fn iter(
         &self,
     ) -> impl Iterator<Item = NodeRef<'tree, 'on_disk>> {
         match self {
             ChildNodesRef::InMemory(nodes) => itertools::Either::Left(
                 nodes.iter().map(|(k, v)| NodeRef::InMemory(k, v)),
             ),
             ChildNodesRef::OnDisk(nodes) => {
                 itertools::Either::Right(nodes.iter().map(NodeRef::OnDisk))
             }
         }
     }
 
     /// Iterate in parallel in undefined order
     pub(super) fn par_iter(
         &self,
     ) -> impl rayon::iter::ParallelIterator<Item = NodeRef<'tree, 'on_disk>>
     {
         use rayon::prelude::*;
         match self {
             ChildNodesRef::InMemory(nodes) => rayon::iter::Either::Left(
                 nodes.par_iter().map(|(k, v)| NodeRef::InMemory(k, v)),
             ),
             ChildNodesRef::OnDisk(nodes) => rayon::iter::Either::Right(
                 nodes.par_iter().map(NodeRef::OnDisk),
             ),
         }
     }
 
     pub(super) fn sorted(&self) -> Vec<NodeRef<'tree, 'on_disk>> {
         match self {
             ChildNodesRef::InMemory(nodes) => {
                 let mut vec: Vec<_> = nodes
                     .iter()
                     .map(|(k, v)| NodeRef::InMemory(k, v))
                     .collect();
                 fn sort_key<'a>(node: &'a NodeRef) -> &'a HgPath {
                     match node {
                         NodeRef::InMemory(path, _node) => path.base_name(),
                         NodeRef::OnDisk(_) => unreachable!(),
                     }
                 }
                 // `sort_unstable_by_key` doesn’t allow keys borrowing from the
                 // value: https://github.com/rust-lang/rust/issues/34162
                 vec.sort_unstable_by(|a, b| sort_key(a).cmp(sort_key(b)));
                 vec
             }
             ChildNodesRef::OnDisk(nodes) => {
                 // Nodes on disk are already sorted
                 nodes.iter().map(NodeRef::OnDisk).collect()
             }
         }
     }
 }
 
 impl<'tree, 'on_disk> NodeRef<'tree, 'on_disk> {
     pub(super) fn full_path(
         &self,
         on_disk: &'on_disk [u8],
     ) -> Result<&'tree HgPath, DirstateV2ParseError> {
         match self {
             NodeRef::InMemory(path, _node) => Ok(path.full_path()),
             NodeRef::OnDisk(node) => node.full_path(on_disk),
         }
     }
 
     /// Returns a `BorrowedPath`, which can be turned into a `Cow<'on_disk,
     /// HgPath>` detached from `'tree`
     pub(super) fn full_path_borrowed(
         &self,
         on_disk: &'on_disk [u8],
     ) -> Result<BorrowedPath<'tree, 'on_disk>, DirstateV2ParseError> {
         match self {
             NodeRef::InMemory(path, _node) => match path.full_path() {
                 Cow::Borrowed(on_disk) => Ok(BorrowedPath::OnDisk(on_disk)),
                 Cow::Owned(in_memory) => Ok(BorrowedPath::InMemory(in_memory)),
             },
             NodeRef::OnDisk(node) => {
                 Ok(BorrowedPath::OnDisk(node.full_path(on_disk)?))
             }
         }
     }
 
     pub(super) fn base_name(
         &self,
         on_disk: &'on_disk [u8],
     ) -> Result<&'tree HgPath, DirstateV2ParseError> {
         match self {
             NodeRef::InMemory(path, _node) => Ok(path.base_name()),
             NodeRef::OnDisk(node) => node.base_name(on_disk),
         }
     }
 
     pub(super) fn children(
         &self,
         on_disk: &'on_disk [u8],
     ) -> Result<ChildNodesRef<'tree, 'on_disk>, DirstateV2ParseError> {
         match self {
             NodeRef::InMemory(_path, node) => Ok(node.children.as_ref()),
             NodeRef::OnDisk(node) => {
                 Ok(ChildNodesRef::OnDisk(node.children(on_disk)?))
             }
         }
     }
 
     pub(super) fn has_copy_source(&self) -> bool {
         match self {
             NodeRef::InMemory(_path, node) => node.copy_source.is_some(),
             NodeRef::OnDisk(node) => node.has_copy_source(),
         }
     }
 
     pub(super) fn copy_source(
         &self,
         on_disk: &'on_disk [u8],
     ) -> Result<Option<&'tree HgPath>, DirstateV2ParseError> {
         match self {
             NodeRef::InMemory(_path, node) => {
                 Ok(node.copy_source.as_ref().map(|s| &**s))
             }
             NodeRef::OnDisk(node) => node.copy_source(on_disk),
         }
     }
 
     pub(super) fn entry(
         &self,
     ) -> Result<Option<DirstateEntry>, DirstateV2ParseError> {
         match self {
             NodeRef::InMemory(_path, node) => {
                 Ok(node.data.as_entry().copied())
             }
             NodeRef::OnDisk(node) => node.entry(),
         }
     }
 
     pub(super) fn state(
         &self,
     ) -> Result<Option<EntryState>, DirstateV2ParseError> {
         match self {
             NodeRef::InMemory(_path, node) => {
                 Ok(node.data.as_entry().map(|entry| entry.state()))
             }
             NodeRef::OnDisk(node) => node.state(),
         }
     }
 
     pub(super) fn cached_directory_mtime(
         &self,
     ) -> Option<&'tree on_disk::Timestamp> {
         match self {
             NodeRef::InMemory(_path, node) => match &node.data {
                 NodeData::CachedDirectory { mtime } => Some(mtime),
                 _ => None,
             },
             NodeRef::OnDisk(node) => node.cached_directory_mtime(),
         }
     }
 
     pub(super) fn descendants_with_entry_count(&self) -> u32 {
         match self {
             NodeRef::InMemory(_path, node) => {
                 node.descendants_with_entry_count
             }
             NodeRef::OnDisk(node) => node.descendants_with_entry_count.get(),
         }
     }
 
     pub(super) fn tracked_descendants_count(&self) -> u32 {
         match self {
             NodeRef::InMemory(_path, node) => node.tracked_descendants_count,
             NodeRef::OnDisk(node) => node.tracked_descendants_count.get(),
         }
     }
 }
 
 /// Represents a file or a directory
 #[derive(Default)]
 pub(super) struct Node<'on_disk> {
     pub(super) data: NodeData,
 
     pub(super) copy_source: Option<Cow<'on_disk, HgPath>>,
 
     pub(super) children: ChildNodes<'on_disk>,
 
     /// How many (non-inclusive) descendants of this node have an entry.
     pub(super) descendants_with_entry_count: u32,
 
     /// How many (non-inclusive) descendants of this node have an entry whose
     /// state is "tracked".
     pub(super) tracked_descendants_count: u32,
 }
 
 pub(super) enum NodeData {
     Entry(DirstateEntry),
     CachedDirectory { mtime: on_disk::Timestamp },
     None,
 }
 
 impl Default for NodeData {
     fn default() -> Self {
         NodeData::None
     }
 }
 
 impl NodeData {
     fn has_entry(&self) -> bool {
         match self {
             NodeData::Entry(_) => true,
             _ => false,
         }
     }
 
     fn as_entry(&self) -> Option<&DirstateEntry> {
         match self {
             NodeData::Entry(entry) => Some(entry),
             _ => None,
         }
     }
 }
 
 impl<'on_disk> DirstateMap<'on_disk> {
     pub(super) fn empty(on_disk: &'on_disk [u8]) -> Self {
         Self {
             on_disk,
             root: ChildNodes::default(),
             nodes_with_entry_count: 0,
             nodes_with_copy_source_count: 0,
             ignore_patterns_hash: [0; on_disk::IGNORE_PATTERNS_HASH_LEN],
             unreachable_bytes: 0,
         }
     }
 
     #[timed]
     pub fn new_v2(
         on_disk: &'on_disk [u8],
         data_size: usize,
         metadata: &[u8],
     ) -> Result<Self, DirstateError> {
         if let Some(data) = on_disk.get(..data_size) {
             Ok(on_disk::read(data, metadata)?)
         } else {
             Err(DirstateV2ParseError.into())
         }
     }
 
     #[timed]
     pub fn new_v1(
         on_disk: &'on_disk [u8],
     ) -> Result<(Self, Option<DirstateParents>), DirstateError> {
         let mut map = Self::empty(on_disk);
         if map.on_disk.is_empty() {
             return Ok((map, None));
         }
 
         let parents = parse_dirstate_entries(
             map.on_disk,
             |path, entry, copy_source| {
                 let tracked = entry.state().is_tracked();
                 let node = Self::get_or_insert_node(
                     map.on_disk,
                     &mut map.unreachable_bytes,
                     &mut map.root,
                     path,
                     WithBasename::to_cow_borrowed,
                     |ancestor| {
                         if tracked {
                             ancestor.tracked_descendants_count += 1
                         }
                         ancestor.descendants_with_entry_count += 1
                     },
                 )?;
                 assert!(
                     !node.data.has_entry(),
                     "duplicate dirstate entry in read"
                 );
                 assert!(
                     node.copy_source.is_none(),
                     "duplicate dirstate entry in read"
                 );
                 node.data = NodeData::Entry(*entry);
                 node.copy_source = copy_source.map(Cow::Borrowed);
                 map.nodes_with_entry_count += 1;
                 if copy_source.is_some() {
                     map.nodes_with_copy_source_count += 1
                 }
                 Ok(())
             },
         )?;
         let parents = Some(parents.clone());
 
         Ok((map, parents))
     }
 
     /// Assuming dirstate-v2 format, returns whether the next write should
     /// append to the existing data file that contains `self.on_disk` (true),
     /// or create a new data file from scratch (false).
     pub(super) fn write_should_append(&self) -> bool {
         let ratio = self.unreachable_bytes as f32 / self.on_disk.len() as f32;
         ratio < ACCEPTABLE_UNREACHABLE_BYTES_RATIO
     }
 
     fn get_node<'tree>(
         &'tree self,
         path: &HgPath,
     ) -> Result<Option<NodeRef<'tree, 'on_disk>>, DirstateV2ParseError> {
         let mut children = self.root.as_ref();
         let mut components = path.components();
         let mut component =
             components.next().expect("expected at least one components");
         loop {
             if let Some(child) = children.get(component, self.on_disk)? {
                 if let Some(next_component) = components.next() {
                     component = next_component;
                     children = child.children(self.on_disk)?;
                 } else {
                     return Ok(Some(child));
                 }
             } else {
                 return Ok(None);
             }
         }
     }
 
     /// Returns a mutable reference to the node at `path` if it exists
     ///
     /// This takes `root` instead of `&mut self` so that callers can mutate
     /// other fields while the returned borrow is still valid
     fn get_node_mut<'tree>(
         on_disk: &'on_disk [u8],
         unreachable_bytes: &mut u32,
         root: &'tree mut ChildNodes<'on_disk>,
         path: &HgPath,
     ) -> Result<Option<&'tree mut Node<'on_disk>>, DirstateV2ParseError> {
         let mut children = root;
         let mut components = path.components();
         let mut component =
             components.next().expect("expected at least one components");
         loop {
             if let Some(child) = children
                 .make_mut(on_disk, unreachable_bytes)?
                 .get_mut(component)
             {
                 if let Some(next_component) = components.next() {
                     component = next_component;
                     children = &mut child.children;
                 } else {
                     return Ok(Some(child));
                 }
             } else {
                 return Ok(None);
             }
         }
     }
 
     pub(super) fn get_or_insert<'tree, 'path>(
         &'tree mut self,
         path: &HgPath,
     ) -> Result<&'tree mut Node<'on_disk>, DirstateV2ParseError> {
         Self::get_or_insert_node(
             self.on_disk,
             &mut self.unreachable_bytes,
             &mut self.root,
             path,
             WithBasename::to_cow_owned,
             |_| {},
         )
     }
 
     fn get_or_insert_node<'tree, 'path>(
         on_disk: &'on_disk [u8],
         unreachable_bytes: &mut u32,
         root: &'tree mut ChildNodes<'on_disk>,
         path: &'path HgPath,
         to_cow: impl Fn(
             WithBasename<&'path HgPath>,
         ) -> WithBasename<Cow<'on_disk, HgPath>>,
         mut each_ancestor: impl FnMut(&mut Node),
     ) -> Result<&'tree mut Node<'on_disk>, DirstateV2ParseError> {
         let mut child_nodes = root;
         let mut inclusive_ancestor_paths =
             WithBasename::inclusive_ancestors_of(path);
         let mut ancestor_path = inclusive_ancestor_paths
             .next()
             .expect("expected at least one inclusive ancestor");
         loop {
             // TODO: can we avoid allocating an owned key in cases where the
             // map already contains that key, without introducing double
             // lookup?
             let child_node = child_nodes
                 .make_mut(on_disk, unreachable_bytes)?
                 .entry(to_cow(ancestor_path))
                 .or_default();
             if let Some(next) = inclusive_ancestor_paths.next() {
                 each_ancestor(child_node);
                 ancestor_path = next;
                 child_nodes = &mut child_node.children;
             } else {
                 return Ok(child_node);
             }
         }
     }
 
     fn add_or_remove_file(
         &mut self,
         path: &HgPath,
         old_state: Option<EntryState>,
         new_entry: DirstateEntry,
     ) -> Result<(), DirstateV2ParseError> {
         let had_entry = old_state.is_some();
         let was_tracked = old_state.map_or(false, |s| s.is_tracked());
         let tracked_count_increment =
             match (was_tracked, new_entry.state().is_tracked()) {
                 (false, true) => 1,
                 (true, false) => -1,
                 _ => 0,
             };
 
         let node = Self::get_or_insert_node(
             self.on_disk,
             &mut self.unreachable_bytes,
             &mut self.root,
             path,
             WithBasename::to_cow_owned,
             |ancestor| {
                 if !had_entry {
                     ancestor.descendants_with_entry_count += 1;
                 }
 
                 // We can’t use `+= increment` because the counter is unsigned,
                 // and we want debug builds to detect accidental underflow
                 // through zero
                 match tracked_count_increment {
                     1 => ancestor.tracked_descendants_count += 1,
                     -1 => ancestor.tracked_descendants_count -= 1,
                     _ => {}
                 }
             },
         )?;
         if !had_entry {
             self.nodes_with_entry_count += 1
         }
         node.data = NodeData::Entry(new_entry);
         Ok(())
     }
 
     fn iter_nodes<'tree>(
         &'tree self,
     ) -> impl Iterator<
         Item = Result<NodeRef<'tree, 'on_disk>, DirstateV2ParseError>,
     > + 'tree {
         // Depth first tree traversal.
         //
         // If we could afford internal iteration and recursion,
         // this would look like:
         //
         // ```
         // fn traverse_children(
         //     children: &ChildNodes,
         //     each: &mut impl FnMut(&Node),
         // ) {
         //     for child in children.values() {
         //         traverse_children(&child.children, each);
         //         each(child);
         //     }
         // }
         // ```
         //
         // However we want an external iterator and therefore can’t use the
         // call stack. Use an explicit stack instead:
         let mut stack = Vec::new();
         let mut iter = self.root.as_ref().iter();
         std::iter::from_fn(move || {
             while let Some(child_node) = iter.next() {
                 let children = match child_node.children(self.on_disk) {
                     Ok(children) => children,
                     Err(error) => return Some(Err(error)),
                 };
                 // Pseudo-recursion
                 let new_iter = children.iter();
                 let old_iter = std::mem::replace(&mut iter, new_iter);
                 stack.push((child_node, old_iter));
             }
             // Found the end of a `children.iter()` iterator.
             if let Some((child_node, next_iter)) = stack.pop() {
                 // "Return" from pseudo-recursion by restoring state from the
                 // explicit stack
                 iter = next_iter;
 
                 Some(Ok(child_node))
             } else {
                 // Reached the bottom of the stack, we’re done
                 None
             }
         })
     }
 
     fn clear_known_ambiguous_mtimes(
         &mut self,
         paths: &[impl AsRef<HgPath>],
     ) -> Result<(), DirstateV2ParseError> {
         for path in paths {
             if let Some(node) = Self::get_node_mut(
                 self.on_disk,
                 &mut self.unreachable_bytes,
                 &mut self.root,
                 path.as_ref(),
             )? {
                 if let NodeData::Entry(entry) = &mut node.data {
-                    entry.clear_mtime();
+                    entry.set_possibly_dirty();
                 }
             }
         }
         Ok(())
     }
 
     fn count_dropped_path(unreachable_bytes: &mut u32, path: &Cow<HgPath>) {
         if let Cow::Borrowed(path) = path {
             *unreachable_bytes += path.len() as u32
         }
     }
 }
 
 /// Like `Iterator::filter_map`, but over a fallible iterator of `Result`s.
 ///
 /// The callback is only called for incoming `Ok` values. Errors are passed
 /// through as-is. In order to let it use the `?` operator the callback is
 /// expected to return a `Result` of `Option`, instead of an `Option` of
 /// `Result`.
 fn filter_map_results<'a, I, F, A, B, E>(
     iter: I,
     f: F,
 ) -> impl Iterator<Item = Result<B, E>> + 'a
 where
     I: Iterator<Item = Result<A, E>> + 'a,
     F: Fn(A) -> Result<Option<B>, E> + 'a,
 {
     iter.filter_map(move |result| match result {
         Ok(node) => f(node).transpose(),
         Err(e) => Some(Err(e)),
     })
 }
 
 impl OwningDirstateMap {
     pub fn clear(&mut self) {
         let map = self.get_map_mut();
         map.root = Default::default();
         map.nodes_with_entry_count = 0;
         map.nodes_with_copy_source_count = 0;
     }
 
     pub fn set_entry(
         &mut self,
         filename: &HgPath,
         entry: DirstateEntry,
     ) -> Result<(), DirstateV2ParseError> {
         let map = self.get_map_mut();
         map.get_or_insert(&filename)?.data = NodeData::Entry(entry);
         Ok(())
     }
 
     pub fn add_file(
         &mut self,
         filename: &HgPath,
         entry: DirstateEntry,
     ) -> Result<(), DirstateError> {
         let old_state = self.get(filename)?.map(|e| e.state());
         let map = self.get_map_mut();
         Ok(map.add_or_remove_file(filename, old_state, entry)?)
     }
 
     pub fn remove_file(
         &mut self,
         filename: &HgPath,
         in_merge: bool,
     ) -> Result<(), DirstateError> {
         let old_entry_opt = self.get(filename)?;
         let old_state = old_entry_opt.map(|e| e.state());
         let mut size = 0;
         if in_merge {
             // XXX we should not be able to have 'm' state and 'FROM_P2' if not
             // during a merge. So I (marmoute) am not sure we need the
             // conditionnal at all. Adding double checking this with assert
             // would be nice.
             if let Some(old_entry) = old_entry_opt {
                 // backup the previous state
                 if old_entry.state() == EntryState::Merged {
                     size = SIZE_NON_NORMAL;
                 } else if old_entry.state() == EntryState::Normal
                     && old_entry.size() == SIZE_FROM_OTHER_PARENT
                 {
                     // other parent
                     size = SIZE_FROM_OTHER_PARENT;
                 }
             }
         }
         if size == 0 {
             self.copy_map_remove(filename)?;
         }
         let map = self.get_map_mut();
         let entry = DirstateEntry::new_removed(size);
         Ok(map.add_or_remove_file(filename, old_state, entry)?)
     }
 
     pub fn drop_entry_and_copy_source(
         &mut self,
         filename: &HgPath,
     ) -> Result<(), DirstateError> {
         let was_tracked = self
             .get(filename)?
             .map_or(false, |e| e.state().is_tracked());
         let map = self.get_map_mut();
         struct Dropped {
             was_tracked: bool,
             had_entry: bool,
             had_copy_source: bool,
         }
 
         /// If this returns `Ok(Some((dropped, removed)))`, then
         ///
         /// * `dropped` is about the leaf node that was at `filename`
         /// * `removed` is whether this particular level of recursion just
         ///   removed a node in `nodes`.
         fn recur<'on_disk>(
             on_disk: &'on_disk [u8],
             unreachable_bytes: &mut u32,
             nodes: &mut ChildNodes<'on_disk>,
             path: &HgPath,
         ) -> Result<Option<(Dropped, bool)>, DirstateV2ParseError> {
             let (first_path_component, rest_of_path) =
                 path.split_first_component();
             let nodes = nodes.make_mut(on_disk, unreachable_bytes)?;
             let node = if let Some(node) = nodes.get_mut(first_path_component)
             {
                 node
             } else {
                 return Ok(None);
             };
             let dropped;
             if let Some(rest) = rest_of_path {
                 if let Some((d, removed)) = recur(
                     on_disk,
                     unreachable_bytes,
                     &mut node.children,
                     rest,
                 )? {
                     dropped = d;
                     if dropped.had_entry {
                         node.descendants_with_entry_count -= 1;
                     }
                     if dropped.was_tracked {
                         node.tracked_descendants_count -= 1;
                     }
 
                     // Directory caches must be invalidated when removing a
                     // child node
                     if removed {
                         if let NodeData::CachedDirectory { .. } = &node.data {
                             node.data = NodeData::None
                         }
                     }
                 } else {
                     return Ok(None);
                 }
             } else {
                 let had_entry = node.data.has_entry();
                 if had_entry {
                     node.data = NodeData::None
                 }
                 if let Some(source) = &node.copy_source {
                     DirstateMap::count_dropped_path(unreachable_bytes, source);
                     node.copy_source = None
                 }
                 dropped = Dropped {
                     was_tracked: node
                         .data
                         .as_entry()
                         .map_or(false, |entry| entry.state().is_tracked()),
                     had_entry,
                     had_copy_source: node.copy_source.take().is_some(),
                 };
             }
             // After recursion, for both leaf (rest_of_path is None) nodes and
             // parent nodes, remove a node if it just became empty.
             let remove = !node.data.has_entry()
                 && node.copy_source.is_none()
                 && node.children.is_empty();
             if remove {
                 let (key, _) =
                     nodes.remove_entry(first_path_component).unwrap();
                 DirstateMap::count_dropped_path(
                     unreachable_bytes,
                     key.full_path(),
                 )
             }
             Ok(Some((dropped, remove)))
         }
 
         if let Some((dropped, _removed)) = recur(
             map.on_disk,
             &mut map.unreachable_bytes,
             &mut map.root,
             filename,
         )? {
             if dropped.had_entry {
                 map.nodes_with_entry_count -= 1
             }
             if dropped.had_copy_source {
                 map.nodes_with_copy_source_count -= 1
             }
         } else {
             debug_assert!(!was_tracked);
         }
         Ok(())
     }
 
     pub fn has_tracked_dir(
         &mut self,
         directory: &HgPath,
     ) -> Result<bool, DirstateError> {
         let map = self.get_map_mut();
         if let Some(node) = map.get_node(directory)? {
             // A node without a `DirstateEntry` was created to hold child
             // nodes, and is therefore a directory.
             let state = node.state()?;
             Ok(state.is_none() && node.tracked_descendants_count() > 0)
         } else {
             Ok(false)
         }
     }
 
     pub fn has_dir(
         &mut self,
         directory: &HgPath,
     ) -> Result<bool, DirstateError> {
         let map = self.get_map_mut();
         if let Some(node) = map.get_node(directory)? {
             // A node without a `DirstateEntry` was created to hold child
             // nodes, and is therefore a directory.
             let state = node.state()?;
             Ok(state.is_none() && node.descendants_with_entry_count() > 0)
         } else {
             Ok(false)
         }
     }
 
     #[timed]
     pub fn pack_v1(
         &mut self,
         parents: DirstateParents,
         now: Timestamp,
     ) -> Result<Vec<u8>, DirstateError> {
         let map = self.get_map_mut();
         let now: i32 = now.0.try_into().expect("time overflow");
         let mut ambiguous_mtimes = Vec::new();
         // Optizimation (to be measured?): pre-compute size to avoid `Vec`
         // reallocations
         let mut size = parents.as_bytes().len();
         for node in map.iter_nodes() {
             let node = node?;
             if let Some(entry) = node.entry()? {
                 size += packed_entry_size(
                     node.full_path(map.on_disk)?,
                     node.copy_source(map.on_disk)?,
                 );
                 if entry.mtime_is_ambiguous(now) {
                     ambiguous_mtimes.push(
                         node.full_path_borrowed(map.on_disk)?
                             .detach_from_tree(),
                     )
                 }
             }
         }
         map.clear_known_ambiguous_mtimes(&ambiguous_mtimes)?;
 
         let mut packed = Vec::with_capacity(size);
         packed.extend(parents.as_bytes());
 
         for node in map.iter_nodes() {
             let node = node?;
             if let Some(entry) = node.entry()? {
                 pack_entry(
                     node.full_path(map.on_disk)?,
                     &entry,
                     node.copy_source(map.on_disk)?,
                     &mut packed,
                 );
             }
         }
         Ok(packed)
     }
 
     /// Returns new data and metadata together with whether that data should be
     /// appended to the existing data file whose content is at
     /// `map.on_disk` (true), instead of written to a new data file
     /// (false).
     #[timed]
     pub fn pack_v2(
         &mut self,
         now: Timestamp,
         can_append: bool,
     ) -> Result<(Vec<u8>, Vec<u8>, bool), DirstateError> {
         let map = self.get_map_mut();
         // TODO: how do we want to handle this in 2038?
         let now: i32 = now.0.try_into().expect("time overflow");
         let mut paths = Vec::new();
         for node in map.iter_nodes() {
             let node = node?;
             if let Some(entry) = node.entry()? {
                 if entry.mtime_is_ambiguous(now) {
                     paths.push(
                         node.full_path_borrowed(map.on_disk)?
                             .detach_from_tree(),
                     )
                 }
             }
         }
         // Borrow of `self` ends here since we collect cloned paths
 
         map.clear_known_ambiguous_mtimes(&paths)?;
 
         on_disk::write(map, can_append)
     }
 
     pub fn status<'a>(
         &'a mut self,
         matcher: &'a (dyn Matcher + Sync),
         root_dir: PathBuf,
         ignore_files: Vec<PathBuf>,
         options: StatusOptions,
     ) -> Result<(DirstateStatus<'a>, Vec<PatternFileWarning>), StatusError>
     {
         let map = self.get_map_mut();
         super::status::status(map, matcher, root_dir, ignore_files, options)
     }
 
     pub fn copy_map_len(&self) -> usize {
         let map = self.get_map();
         map.nodes_with_copy_source_count as usize
     }
 
     pub fn copy_map_iter(&self) -> CopyMapIter<'_> {
         let map = self.get_map();
         Box::new(filter_map_results(map.iter_nodes(), move |node| {
             Ok(if let Some(source) = node.copy_source(map.on_disk)? {
                 Some((node.full_path(map.on_disk)?, source))
             } else {
                 None
             })
         }))
     }
 
     pub fn copy_map_contains_key(
         &self,
         key: &HgPath,
     ) -> Result<bool, DirstateV2ParseError> {
         let map = self.get_map();
         Ok(if let Some(node) = map.get_node(key)? {
             node.has_copy_source()
         } else {
             false
         })
     }
 
     pub fn copy_map_get(
         &self,
         key: &HgPath,
     ) -> Result<Option<&HgPath>, DirstateV2ParseError> {
         let map = self.get_map();
         if let Some(node) = map.get_node(key)? {
             if let Some(source) = node.copy_source(map.on_disk)? {
                 return Ok(Some(source));
             }
         }
         Ok(None)
     }
 
     pub fn copy_map_remove(
         &mut self,
         key: &HgPath,
     ) -> Result<Option<HgPathBuf>, DirstateV2ParseError> {
         let map = self.get_map_mut();
         let count = &mut map.nodes_with_copy_source_count;
         let unreachable_bytes = &mut map.unreachable_bytes;
         Ok(DirstateMap::get_node_mut(
             map.on_disk,
             unreachable_bytes,
             &mut map.root,
             key,
         )?
         .and_then(|node| {
             if let Some(source) = &node.copy_source {
                 *count -= 1;
                 DirstateMap::count_dropped_path(unreachable_bytes, source);
             }
             node.copy_source.take().map(Cow::into_owned)
         }))
     }
 
     pub fn copy_map_insert(
         &mut self,
         key: HgPathBuf,
         value: HgPathBuf,
     ) -> Result<Option<HgPathBuf>, DirstateV2ParseError> {
         let map = self.get_map_mut();
         let node = DirstateMap::get_or_insert_node(
             map.on_disk,
             &mut map.unreachable_bytes,
             &mut map.root,
             &key,
             WithBasename::to_cow_owned,
             |_ancestor| {},
         )?;
         if node.copy_source.is_none() {
             map.nodes_with_copy_source_count += 1
         }
         Ok(node.copy_source.replace(value.into()).map(Cow::into_owned))
     }
 
     pub fn len(&self) -> usize {
         let map = self.get_map();
         map.nodes_with_entry_count as usize
     }
 
     pub fn contains_key(
         &self,
         key: &HgPath,
     ) -> Result<bool, DirstateV2ParseError> {
         Ok(self.get(key)?.is_some())
     }
 
     pub fn get(
         &self,
         key: &HgPath,
     ) -> Result<Option<DirstateEntry>, DirstateV2ParseError> {
         let map = self.get_map();
         Ok(if let Some(node) = map.get_node(key)? {
             node.entry()?
         } else {
             None
         })
     }
 
     pub fn iter(&self) -> StateMapIter<'_> {
         let map = self.get_map();
         Box::new(filter_map_results(map.iter_nodes(), move |node| {
             Ok(if let Some(entry) = node.entry()? {
                 Some((node.full_path(map.on_disk)?, entry))
             } else {
                 None
             })
         }))
     }
 
     pub fn iter_tracked_dirs(
         &mut self,
     ) -> Result<
         Box<
             dyn Iterator<Item = Result<&HgPath, DirstateV2ParseError>>
                 + Send
                 + '_,
         >,
         DirstateError,
     > {
         let map = self.get_map_mut();
         let on_disk = map.on_disk;
         Ok(Box::new(filter_map_results(
             map.iter_nodes(),
             move |node| {
                 Ok(if node.tracked_descendants_count() > 0 {
                     Some(node.full_path(on_disk)?)
                 } else {
                     None
                 })
             },
         )))
     }
 
     pub fn debug_iter(
         &self,
         all: bool,
     ) -> Box<
         dyn Iterator<
                 Item = Result<
                     (&HgPath, (u8, i32, i32, i32)),
                     DirstateV2ParseError,
                 >,
             > + Send
             + '_,
     > {
         let map = self.get_map();
         Box::new(filter_map_results(map.iter_nodes(), move |node| {
             let debug_tuple = if let Some(entry) = node.entry()? {
                 entry.debug_tuple()
             } else if !all {
                 return Ok(None);
             } else if let Some(mtime) = node.cached_directory_mtime() {
                 (b' ', 0, -1, mtime.seconds() as i32)
             } else {
                 (b' ', 0, -1, -1)
             };
             Ok(Some((node.full_path(map.on_disk)?, debug_tuple)))
         }))
     }
 }

rust/hg-cpython/src/dirstate/item.rs

@@ -1,218 +1,219
 use cpython::exc;
 use cpython::PyBytes;
 use cpython::PyErr;
 use cpython::PyNone;
 use cpython::PyObject;
 use cpython::PyResult;
 use cpython::Python;
 use cpython::PythonObject;
-use hg::dirstate::entry::Flags;
 use hg::dirstate::DirstateEntry;
 use hg::dirstate::EntryState;
 use std::cell::Cell;
 use std::convert::TryFrom;
 
 py_class!(pub class DirstateItem |py| {
     data entry: Cell<DirstateEntry>;
 
     def __new__(
         _cls,
         wc_tracked: bool = false,
         p1_tracked: bool = false,
-        p2_tracked: bool = false,
-        merged: bool = false,
-        clean_p1: bool = false,
-        clean_p2: bool = false,
-        possibly_dirty: bool = false,
+        p2_info: bool = false,
+        has_meaningful_data: bool = true,
+        has_meaningful_mtime: bool = true,
         parentfiledata: Option<(i32, i32, i32)> = None,
 
     ) -> PyResult<DirstateItem> {
-        let mut flags = Flags::empty();
-        flags.set(Flags::WDIR_TRACKED, wc_tracked);
-        flags.set(Flags::P1_TRACKED, p1_tracked);
-        flags.set(Flags::P2_TRACKED, p2_tracked);
-        flags.set(Flags::MERGED, merged);
-        flags.set(Flags::CLEAN_P1, clean_p1);
-        flags.set(Flags::CLEAN_P2, clean_p2);
-        flags.set(Flags::POSSIBLY_DIRTY, possibly_dirty);
-        let entry = DirstateEntry::new(flags, parentfiledata);
+        let mut mode_size_opt = None;
+        let mut mtime_opt = None;
+        if let Some((mode, size, mtime)) = parentfiledata {
+            if has_meaningful_data {
+                mode_size_opt = Some((mode, size))
+            }
+            if has_meaningful_mtime {
+                mtime_opt = Some(mtime)
+            }
+        }
+        let entry = DirstateEntry::new(
+            wc_tracked, p1_tracked, p2_info, mode_size_opt, mtime_opt,
+        );
         DirstateItem::create_instance(py, Cell::new(entry))
     }
 
     @property
     def state(&self) -> PyResult<PyBytes> {
         let state_byte: u8 = self.entry(py).get().state().into();
         Ok(PyBytes::new(py, &[state_byte]))
     }
 
     @property
     def mode(&self) -> PyResult<i32> {
         Ok(self.entry(py).get().mode())
     }
 
     @property
     def size(&self) -> PyResult<i32> {
         Ok(self.entry(py).get().size())
     }
 
     @property
     def mtime(&self) -> PyResult<i32> {
         Ok(self.entry(py).get().mtime())
     }
 
     @property
     def tracked(&self) -> PyResult<bool> {
         Ok(self.entry(py).get().tracked())
     }
 
     @property
     def added(&self) -> PyResult<bool> {
         Ok(self.entry(py).get().added())
     }
 
     @property
     def merged(&self) -> PyResult<bool> {
         Ok(self.entry(py).get().merged())
     }
 
     @property
     def removed(&self) -> PyResult<bool> {
         Ok(self.entry(py).get().removed())
     }
 
     @property
     def from_p2(&self) -> PyResult<bool> {
         Ok(self.entry(py).get().from_p2())
     }
 
     @property
     def maybe_clean(&self) -> PyResult<bool> {
         Ok(self.entry(py).get().maybe_clean())
     }
 
     @property
     def any_tracked(&self) -> PyResult<bool> {
         Ok(self.entry(py).get().any_tracked())
     }
 
     def v1_state(&self) -> PyResult<PyBytes> {
         let (state, _mode, _size, _mtime) = self.entry(py).get().v1_data();
         let state_byte: u8 = state.into();
         Ok(PyBytes::new(py, &[state_byte]))
     }
 
     def v1_mode(&self) -> PyResult<i32> {
         let (_state, mode, _size, _mtime) = self.entry(py).get().v1_data();
         Ok(mode)
     }
 
     def v1_size(&self) -> PyResult<i32> {
         let (_state, _mode, size, _mtime) = self.entry(py).get().v1_data();
         Ok(size)
     }
 
     def v1_mtime(&self) -> PyResult<i32> {
         let (_state, _mode, _size, mtime) = self.entry(py).get().v1_data();
         Ok(mtime)
     }
 
     def need_delay(&self, now: i32) -> PyResult<bool> {
         Ok(self.entry(py).get().mtime_is_ambiguous(now))
     }
 
     @classmethod
     def from_v1_data(
         _cls,
         state: PyBytes,
         mode: i32,
         size: i32,
         mtime: i32,
     ) -> PyResult<Self> {
         let state = <[u8; 1]>::try_from(state.data(py))
             .ok()
             .and_then(|state| EntryState::try_from(state[0]).ok())
             .ok_or_else(|| PyErr::new::<exc::ValueError, _>(py, "invalid state"))?;
         let entry = DirstateEntry::from_v1_data(state, mode, size, mtime);
         DirstateItem::create_instance(py, Cell::new(entry))
     }
 
     @classmethod
     def new_added(_cls) -> PyResult<Self> {
         let entry = DirstateEntry::new_added();
         DirstateItem::create_instance(py, Cell::new(entry))
     }
 
     @classmethod
     def new_merged(_cls) -> PyResult<Self> {
         let entry = DirstateEntry::new_merged();
         DirstateItem::create_instance(py, Cell::new(entry))
     }
 
     @classmethod
     def new_from_p2(_cls) -> PyResult<Self> {
         let entry = DirstateEntry::new_from_p2();
         DirstateItem::create_instance(py, Cell::new(entry))
     }
 
     @classmethod
     def new_possibly_dirty(_cls) -> PyResult<Self> {
         let entry = DirstateEntry::new_possibly_dirty();
         DirstateItem::create_instance(py, Cell::new(entry))
     }
 
     @classmethod
     def new_normal(_cls, mode: i32, size: i32, mtime: i32) -> PyResult<Self> {
         let entry = DirstateEntry::new_normal(mode, size, mtime);
         DirstateItem::create_instance(py, Cell::new(entry))
     }
 
     def drop_merge_data(&self) -> PyResult<PyNone> {
         self.update(py, |entry| entry.drop_merge_data());
         Ok(PyNone)
     }
 
     def set_clean(
         &self,
         mode: i32,
         size: i32,
         mtime: i32,
     ) -> PyResult<PyNone> {
         self.update(py, |entry| entry.set_clean(mode, size, mtime));
         Ok(PyNone)
     }
 
     def set_possibly_dirty(&self) -> PyResult<PyNone> {
         self.update(py, |entry| entry.set_possibly_dirty());
         Ok(PyNone)
     }
 
     def set_tracked(&self) -> PyResult<PyNone> {
         self.update(py, |entry| entry.set_tracked());
         Ok(PyNone)
     }
 
     def set_untracked(&self) -> PyResult<PyNone> {
         self.update(py, |entry| entry.set_untracked());
         Ok(PyNone)
     }
 });
 
 impl DirstateItem {
     pub fn new_as_pyobject(
         py: Python<'_>,
         entry: DirstateEntry,
     ) -> PyResult<PyObject> {
         Ok(DirstateItem::create_instance(py, Cell::new(entry))?.into_object())
     }
 
     pub fn get_entry(&self, py: Python<'_>) -> DirstateEntry {
         self.entry(py).get()
     }
 
     // TODO: Use https://doc.rust-lang.org/std/cell/struct.Cell.html#method.update instead when it’s stable
     pub fn update(&self, py: Python<'_>, f: impl FnOnce(&mut DirstateEntry)) {
         let mut entry = self.entry(py).get();
         f(&mut entry);
         self.entry(py).set(entry)
     }
 }