dirstate-entry: introduce dedicated accessors for v1 serialization

In the spirit of changing the content and storage of the dirstate entry, we add
new method that the code doing v1 serialisation can use.

Adding such method to the C object is quite trivial.

Differential Revision: https://phab.mercurial-scm.org/D10951

mercurial/cext/parsers.c

@@ -118,6 +118,38 b' static PySequenceMethods dirstate_tuple_'
     0                      /* sq_inplace_repeat */
 };
 
+static PyObject *dirstatetuple_v1_state(dirstateTupleObject *self)
+{
+	return PyBytes_FromStringAndSize(&self->state, 1);
+};
+
+static PyObject *dirstatetuple_v1_mode(dirstateTupleObject *self)
+{
+	return PyInt_FromLong(self->mode);
+};
+
+static PyObject *dirstatetuple_v1_size(dirstateTupleObject *self)
+{
+	return PyInt_FromLong(self->size);
+};
+
+static PyObject *dirstatetuple_v1_mtime(dirstateTupleObject *self)
+{
+	return PyInt_FromLong(self->mtime);
+};
+
+static PyMethodDef dirstatetuple_methods[] = {
+    {"v1_state", (PyCFunction)dirstatetuple_v1_state, METH_NOARGS,
+     "return a \"state\" suitable for v1 serialization"},
+    {"v1_mode", (PyCFunction)dirstatetuple_v1_mode, METH_NOARGS,
+     "return a \"mode\" suitable for v1 serialization"},
+    {"v1_size", (PyCFunction)dirstatetuple_v1_size, METH_NOARGS,
+     "return a \"size\" suitable for v1 serialization"},
+    {"v1_mtime", (PyCFunction)dirstatetuple_v1_mtime, METH_NOARGS,
+     "return a \"mtime\" suitable for v1 serialization"},
+    {NULL} /* Sentinel */
+};
+
 PyTypeObject dirstateTupleType = {
     PyVarObject_HEAD_INIT(NULL, 0)      /* header */
     "dirstate_tuple",                   /* tp_name */
@@ -146,7 +178,7 b' PyTypeObject dirstateTupleType = {'
     0,                                  /* tp_weaklistoffset */
     0,                                  /* tp_iter */
     0,                                  /* tp_iternext */
-    0,                                  /* tp_methods */
+    dirstatetuple_methods,              /* tp_methods */
     0,                                  /* tp_members */
     0,                                  /* tp_getset */
     0,                                  /* tp_base */

mercurial/pure/parsers.py

@@ -64,6 +64,22 b' class dirstatetuple(object):'
         else:
             raise IndexError(idx)
 
+    def v1_state(self):
+        """return a "state" suitable for v1 serialization"""
+        return self._state
+
+    def v1_mode(self):
+        """return a "mode" suitable for v1 serialization"""
+        return self._mode
+
+    def v1_size(self):
+        """return a "size" suitable for v1 serialization"""
+        return self._size
+
+    def v1_mtime(self):
+        """return a "mtime" suitable for v1 serialization"""
+        return self._mtime
+
 
 def gettype(q):
     return int(q & 0xFFFF)
@@ -450,7 +466,14 b' def pack_dirstate(dmap, copymap, pl, now'
 
         if f in copymap:
             f = b"%s\0%s" % (f, copymap[f])
-        e = _pack(b">cllll", e[0], e[1], e[2], e[3], len(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()