mpatch: split mpatch into two files

mercurial/mpatch.h

@@ -0,0 +1,20 b''
+#ifndef _HG_MPATCH_H_
+#define _HG_MPATCH_H_
+
+struct mpatch_frag {
+	int start, end, len;
+	const char *data;
+};
+
+struct mpatch_flist {
+	struct mpatch_frag *base, *head, *tail;
+};
+
+int mpatch_decode(const char *bin, ssize_t len, struct mpatch_flist** res);
+ssize_t mpatch_calcsize(ssize_t len, struct mpatch_flist *l);
+void mpatch_lfree(struct mpatch_flist *a);
+int mpatch_apply(char *buf, const char *orig, ssize_t len,
+	struct mpatch_flist *l);
+struct mpatch_flist *mpatch_fold(void *bins, ssize_t start, ssize_t end);
+
+#endif

mercurial/mpatch.c

@@ -1,428 +1,310 b''
 /*
  mpatch.c - efficient binary patching for Mercurial
 
  This implements a patch algorithm that's O(m + nlog n) where m is the
  size of the output and n is the number of patches.
 
  Given a list of binary patches, it unpacks each into a hunk list,
  then combines the hunk lists with a treewise recursion to form a
  single hunk list. This hunk list is then applied to the original
  text.
 
  The text (or binary) fragments are copied directly from their source
  Python objects into a preallocated output string to avoid the
  allocation of intermediate Python objects. Working memory is about 2x
  the total number of hunks.
 
  Copyright 2005, 2006 Matt Mackall <[e-mail]>
 
  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 <stdlib.h>
 #include <string.h>
 
 #include "util.h"
 #include "bitmanipulation.h"
 #include "compat.h"
 
 static char mpatch_doc[] = "Efficient binary patching.";
 static PyObject *mpatch_Error;
 
 struct mpatch_frag {
 	int start, end, len;
 	const char *data;
 };
 
 struct mpatch_flist {
 	struct mpatch_frag *base, *head, *tail;
 };
 
-static struct mpatch_flist *lalloc(ssize_t size)
+struct mpatch_flist *lalloc(ssize_t size)
 {
 	struct mpatch_flist *a = NULL;
 
 	if (size < 1)
 		size = 1;
 
 	a = (struct mpatch_flist *)malloc(sizeof(struct mpatch_flist));
 	if (a) {
 		a->base = (struct mpatch_frag *)malloc(sizeof(struct mpatch_frag) * size);
 		if (a->base) {
 			a->head = a->tail = a->base;
 			return a;
 		}
 		free(a);
 		a = NULL;
 	}
 	if (!PyErr_Occurred())
 		PyErr_NoMemory();
 	return NULL;
 }
 
-static void mpatch_lfree(struct mpatch_flist *a)
+void mpatch_lfree(struct mpatch_flist *a)
 {
 	if (a) {
 		free(a->base);
 		free(a);
 	}
 }
 
 static ssize_t lsize(struct mpatch_flist *a)
 {
 	return a->tail - a->head;
 }
 
 /* move hunks in source that are less cut to dest, compensating
    for changes in offset. the last hunk may be split if necessary.
 */
 static int gather(struct mpatch_flist *dest, struct mpatch_flist *src, int cut,
 	int offset)
 {
 	struct mpatch_frag *d = dest->tail, *s = src->head;
 	int postend, c, l;
 
 	while (s != src->tail) {
 		if (s->start + offset >= cut)
 			break; /* we've gone far enough */
 
 		postend = offset + s->start + s->len;
 		if (postend <= cut) {
 			/* save this hunk */
 			offset += s->start + s->len - s->end;
 			*d++ = *s++;
 		}
 		else {
 			/* break up this hunk */
 			c = cut - offset;
 			if (s->end < c)
 				c = s->end;
 			l = cut - offset - s->start;
 			if (s->len < l)
 				l = s->len;
 
 			offset += s->start + l - c;
 
 			d->start = s->start;
 			d->end = c;
 			d->len = l;
 			d->data = s->data;
 			d++;
 			s->start = c;
 			s->len = s->len - l;
 			s->data = s->data + l;
 
 			break;
 		}
 	}
 
 	dest->tail = d;
 	src->head = s;
 	return offset;
 }
 
 /* like gather, but with no output list */
 static int discard(struct mpatch_flist *src, int cut, int offset)
 {
 	struct mpatch_frag *s = src->head;
 	int postend, c, l;
 
 	while (s != src->tail) {
 		if (s->start + offset >= cut)
 			break;
 
 		postend = offset + s->start + s->len;
 		if (postend <= cut) {
 			offset += s->start + s->len - s->end;
 			s++;
 		}
 		else {
 			c = cut - offset;
 			if (s->end < c)
 				c = s->end;
 			l = cut - offset - s->start;
 			if (s->len < l)
 				l = s->len;
 
 			offset += s->start + l - c;
 			s->start = c;
 			s->len = s->len - l;
 			s->data = s->data + l;
 
 			break;
 		}
 	}
 
 	src->head = s;
 	return offset;
 }
 
 /* combine hunk lists a and b, while adjusting b for offset changes in a/
    this deletes a and b and returns the resultant list. */
 static struct mpatch_flist *combine(struct mpatch_flist *a,
 	struct mpatch_flist *b)
 {
 	struct mpatch_flist *c = NULL;
 	struct mpatch_frag *bh, *ct;
 	int offset = 0, post;
 
 	if (a && b)
 		c = lalloc((lsize(a) + lsize(b)) * 2);
 
 	if (c) {
 
 		for (bh = b->head; bh != b->tail; bh++) {
 			/* save old hunks */
 			offset = gather(c, a, bh->start, offset);
 
 			/* discard replaced hunks */
 			post = discard(a, bh->end, offset);
 
 			/* insert new hunk */
 			ct = c->tail;
 			ct->start = bh->start - offset;
 			ct->end = bh->end - post;
 			ct->len = bh->len;
 			ct->data = bh->data;
 			c->tail++;
 			offset = post;
 		}
 
 		/* hold on to tail from a */
 		memcpy(c->tail, a->head, sizeof(struct mpatch_frag) * lsize(a));
 		c->tail += lsize(a);
 	}
 
 	mpatch_lfree(a);
 	mpatch_lfree(b);
 	return c;
 }
 
 /* decode a binary patch into a hunk list */
-static struct mpatch_flist *mpatch_decode(const char *bin, ssize_t len)
+struct mpatch_flist *mpatch_decode(const char *bin, ssize_t len)
 {
 	struct mpatch_flist *l;
 	struct mpatch_frag *lt;
 	int pos = 0;
 
 	/* assume worst case size, we won't have many of these lists */
 	l = lalloc(len / 12 + 1);
 	if (!l)
 		return NULL;
 
 	lt = l->tail;
 
 	while (pos >= 0 && pos < len) {
 		lt->start = getbe32(bin + pos);
 		lt->end = getbe32(bin + pos + 4);
 		lt->len = getbe32(bin + pos + 8);
 		lt->data = bin + pos + 12;
 		pos += 12 + lt->len;
 		if (lt->start > lt->end || lt->len < 0)
 			break; /* sanity check */
 		lt++;
 	}
 
 	if (pos != len) {
 		if (!PyErr_Occurred())
 			PyErr_SetString(mpatch_Error, "patch cannot be decoded");
 		mpatch_lfree(l);
 		return NULL;
 	}
 
 	l->tail = lt;
 	return l;
 }
 
 /* calculate the size of resultant text */
-static ssize_t mpatch_calcsize(ssize_t len, struct mpatch_flist *l)
+ssize_t mpatch_calcsize(ssize_t len, struct mpatch_flist *l)
 {
 	ssize_t outlen = 0, last = 0;
 	struct mpatch_frag *f = l->head;
 
 	while (f != l->tail) {
 		if (f->start < last || f->end > len) {
 			if (!PyErr_Occurred())
 				PyErr_SetString(mpatch_Error,
 				                "invalid patch");
 			return -1;
 		}
 		outlen += f->start - last;
 		last = f->end;
 		outlen += f->len;
 		f++;
 	}
 
 	outlen += len - last;
 	return outlen;
 }
 
-static int mpatch_apply(char *buf, const char *orig, ssize_t len,
+int mpatch_apply(char *buf, const char *orig, ssize_t len,
 	struct mpatch_flist *l)
 {
 	struct mpatch_frag *f = l->head;
 	int last = 0;
 	char *p = buf;
 
 	while (f != l->tail) {
 		if (f->start < last || f->end > len) {
 			if (!PyErr_Occurred())
 				PyErr_SetString(mpatch_Error,
 				                "invalid patch");
 			return 0;
 		}
 		memcpy(p, orig + last, f->start - last);
 		p += f->start - last;
 		memcpy(p, f->data, f->len);
 		last = f->end;
 		p += f->len;
 		f++;
 	}
 	memcpy(p, orig + last, len - last);
 	return 1;
 }
 
 /* recursively generate a patch of all bins between start and end */
-static struct mpatch_flist *mpatch_fold(PyObject *bins, ssize_t start,
+struct mpatch_flist *mpatch_fold(PyObject *bins, ssize_t start,
 	ssize_t end)
 {
 	ssize_t len, blen;
 	const char *buffer;
 
 	if (start + 1 == end) {
 		/* trivial case, output a decoded list */
 		PyObject *tmp = PyList_GetItem(bins, start);
 		if (!tmp)
 			return NULL;
 		if (PyObject_AsCharBuffer(tmp, &buffer, &blen))
 			return NULL;
 		return mpatch_decode(buffer, blen);
 	}
 
 	/* divide and conquer, memory management is elsewhere */
 	len = (end - start) / 2;
 	return combine(mpatch_fold(bins, start, start + len),
 		       mpatch_fold(bins, start + len, end));
 }
 
-static PyObject *
-patches(PyObject *self, PyObject *args)
-{
-	PyObject *text, *bins, *result;
-	struct mpatch_flist *patch;
-	const char *in;
-	char *out;
-	Py_ssize_t len, outlen, inlen;
-
-	if (!PyArg_ParseTuple(args, "OO:mpatch", &text, &bins))
-		return NULL;
-
-	len = PyList_Size(bins);
-	if (!len) {
-		/* nothing to do */
-		Py_INCREF(text);
-		return text;
-	}
-
-	if (PyObject_AsCharBuffer(text, &in, &inlen))
-		return NULL;
-
-	patch = mpatch_fold(bins, 0, len);
-	if (!patch)
-		return NULL;
-
-	outlen = mpatch_calcsize(inlen, patch);
-	if (outlen < 0) {
-		result = NULL;
-		goto cleanup;
-	}
-	result = PyBytes_FromStringAndSize(NULL, outlen);
-	if (!result) {
-		result = NULL;
-		goto cleanup;
-	}
-	out = PyBytes_AsString(result);
-	if (!mpatch_apply(out, in, inlen, patch)) {
-		Py_DECREF(result);
-		result = NULL;
-	}
-cleanup:
-	mpatch_lfree(patch);
-	return result;
-}
-
-/* calculate size of a patched file directly */
-static PyObject *
-patchedsize(PyObject *self, PyObject *args)
-{
-	long orig, start, end, len, outlen = 0, last = 0, pos = 0;
-	Py_ssize_t patchlen;
-	char *bin;
-
-	if (!PyArg_ParseTuple(args, "ls#", &orig, &bin, &patchlen))
-		return NULL;
-
-	while (pos >= 0 && pos < patchlen) {
-		start = getbe32(bin + pos);
-		end = getbe32(bin + pos + 4);
-		len = getbe32(bin + pos + 8);
-		if (start > end)
-			break; /* sanity check */
-		pos += 12 + len;
-		outlen += start - last;
-		last = end;
-		outlen += len;
-	}
-
-	if (pos != patchlen) {
-		if (!PyErr_Occurred())
-			PyErr_SetString(mpatch_Error, "patch cannot be decoded");
-		return NULL;
-	}
-
-	outlen += orig - last;
-	return Py_BuildValue("l", outlen);
-}
-
-static PyMethodDef methods[] = {
-	{"patches", patches, METH_VARARGS, "apply a series of patches\n"},
-	{"patchedsize", patchedsize, METH_VARARGS, "calculed patched size\n"},
-	{NULL, NULL}
-};
-
-#ifdef IS_PY3K
-static struct PyModuleDef mpatch_module = {
-	PyModuleDef_HEAD_INIT,
-	"mpatch",
-	mpatch_doc,
-	-1,
-	methods
-};
-
-PyMODINIT_FUNC PyInit_mpatch(void)
-{
-	PyObject *m;
-
-	m = PyModule_Create(&mpatch_module);
-	if (m == NULL)
-		return NULL;
-
-	mpatch_Error = PyErr_NewException("mercurial.mpatch.mpatchError",
-					  NULL, NULL);
-	Py_INCREF(mpatch_Error);
-	PyModule_AddObject(m, "mpatchError", mpatch_Error);
-
-	return m;
-}
-#else
-PyMODINIT_FUNC
-initmpatch(void)
-{
-	Py_InitModule3("mpatch", methods, mpatch_doc);
-	mpatch_Error = PyErr_NewException("mercurial.mpatch.mpatchError",
-					  NULL, NULL);
-}
-#endif

mercurial/mpatch_module.c

@@ -1,428 +1,153 b''
 /*
  mpatch.c - efficient binary patching for Mercurial
 
  This implements a patch algorithm that's O(m + nlog n) where m is the
  size of the output and n is the number of patches.
 
  Given a list of binary patches, it unpacks each into a hunk list,
  then combines the hunk lists with a treewise recursion to form a
  single hunk list. This hunk list is then applied to the original
  text.
 
  The text (or binary) fragments are copied directly from their source
  Python objects into a preallocated output string to avoid the
  allocation of intermediate Python objects. Working memory is about 2x
  the total number of hunks.
 
  Copyright 2005, 2006 Matt Mackall <[e-mail]>
 
  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 <stdlib.h>
 #include <string.h>
 
 #include "util.h"
 #include "bitmanipulation.h"
 #include "compat.h"
+#include "mpatch.h"
 
 static char mpatch_doc[] = "Efficient binary patching.";
 static PyObject *mpatch_Error;
 
-struct mpatch_frag {
-	int start, end, len;
-	const char *data;
-};
-
-struct mpatch_flist {
-	struct mpatch_frag *base, *head, *tail;
-};
-
-static struct mpatch_flist *lalloc(ssize_t size)
-{
-	struct mpatch_flist *a = NULL;
-
-	if (size < 1)
-		size = 1;
-
-	a = (struct mpatch_flist *)malloc(sizeof(struct mpatch_flist));
-	if (a) {
-		a->base = (struct mpatch_frag *)malloc(sizeof(struct mpatch_frag) * size);
-		if (a->base) {
-			a->head = a->tail = a->base;
-			return a;
-		}
-		free(a);
-		a = NULL;
-	}
-	if (!PyErr_Occurred())
-		PyErr_NoMemory();
-	return NULL;
-}
-
-static void mpatch_lfree(struct mpatch_flist *a)
-{
-	if (a) {
-		free(a->base);
-		free(a);
-	}
-}
-
-static ssize_t lsize(struct mpatch_flist *a)
-{
-	return a->tail - a->head;
-}
-
-/* move hunks in source that are less cut to dest, compensating
-   for changes in offset. the last hunk may be split if necessary.
-*/
-static int gather(struct mpatch_flist *dest, struct mpatch_flist *src, int cut,
-	int offset)
-{
-	struct mpatch_frag *d = dest->tail, *s = src->head;
-	int postend, c, l;
-
-	while (s != src->tail) {
-		if (s->start + offset >= cut)
-			break; /* we've gone far enough */
-
-		postend = offset + s->start + s->len;
-		if (postend <= cut) {
-			/* save this hunk */
-			offset += s->start + s->len - s->end;
-			*d++ = *s++;
-		}
-		else {
-			/* break up this hunk */
-			c = cut - offset;
-			if (s->end < c)
-				c = s->end;
-			l = cut - offset - s->start;
-			if (s->len < l)
-				l = s->len;
-
-			offset += s->start + l - c;
-
-			d->start = s->start;
-			d->end = c;
-			d->len = l;
-			d->data = s->data;
-			d++;
-			s->start = c;
-			s->len = s->len - l;
-			s->data = s->data + l;
-
-			break;
-		}
-	}
-
-	dest->tail = d;
-	src->head = s;
-	return offset;
-}
-
-/* like gather, but with no output list */
-static int discard(struct mpatch_flist *src, int cut, int offset)
-{
-	struct mpatch_frag *s = src->head;
-	int postend, c, l;
-
-	while (s != src->tail) {
-		if (s->start + offset >= cut)
-			break;
-
-		postend = offset + s->start + s->len;
-		if (postend <= cut) {
-			offset += s->start + s->len - s->end;
-			s++;
-		}
-		else {
-			c = cut - offset;
-			if (s->end < c)
-				c = s->end;
-			l = cut - offset - s->start;
-			if (s->len < l)
-				l = s->len;
-
-			offset += s->start + l - c;
-			s->start = c;
-			s->len = s->len - l;
-			s->data = s->data + l;
-
-			break;
-		}
-	}
-
-	src->head = s;
-	return offset;
-}
-
-/* combine hunk lists a and b, while adjusting b for offset changes in a/
-   this deletes a and b and returns the resultant list. */
-static struct mpatch_flist *combine(struct mpatch_flist *a,
-	struct mpatch_flist *b)
-{
-	struct mpatch_flist *c = NULL;
-	struct mpatch_frag *bh, *ct;
-	int offset = 0, post;
-
-	if (a && b)
-		c = lalloc((lsize(a) + lsize(b)) * 2);
-
-	if (c) {
-
-		for (bh = b->head; bh != b->tail; bh++) {
-			/* save old hunks */
-			offset = gather(c, a, bh->start, offset);
-
-			/* discard replaced hunks */
-			post = discard(a, bh->end, offset);
-
-			/* insert new hunk */
-			ct = c->tail;
-			ct->start = bh->start - offset;
-			ct->end = bh->end - post;
-			ct->len = bh->len;
-			ct->data = bh->data;
-			c->tail++;
-			offset = post;
-		}
-
-		/* hold on to tail from a */
-		memcpy(c->tail, a->head, sizeof(struct mpatch_frag) * lsize(a));
-		c->tail += lsize(a);
-	}
-
-	mpatch_lfree(a);
-	mpatch_lfree(b);
-	return c;
-}
-
-/* decode a binary patch into a hunk list */
-static struct mpatch_flist *mpatch_decode(const char *bin, ssize_t len)
-{
-	struct mpatch_flist *l;
-	struct mpatch_frag *lt;
-	int pos = 0;
-
-	/* assume worst case size, we won't have many of these lists */
-	l = lalloc(len / 12 + 1);
-	if (!l)
-		return NULL;
-
-	lt = l->tail;
-
-	while (pos >= 0 && pos < len) {
-		lt->start = getbe32(bin + pos);
-		lt->end = getbe32(bin + pos + 4);
-		lt->len = getbe32(bin + pos + 8);
-		lt->data = bin + pos + 12;
-		pos += 12 + lt->len;
-		if (lt->start > lt->end || lt->len < 0)
-			break; /* sanity check */
-		lt++;
-	}
-
-	if (pos != len) {
-		if (!PyErr_Occurred())
-			PyErr_SetString(mpatch_Error, "patch cannot be decoded");
-		mpatch_lfree(l);
-		return NULL;
-	}
-
-	l->tail = lt;
-	return l;
-}
-
-/* calculate the size of resultant text */
-static ssize_t mpatch_calcsize(ssize_t len, struct mpatch_flist *l)
-{
-	ssize_t outlen = 0, last = 0;
-	struct mpatch_frag *f = l->head;
-
-	while (f != l->tail) {
-		if (f->start < last || f->end > len) {
-			if (!PyErr_Occurred())
-				PyErr_SetString(mpatch_Error,
-				                "invalid patch");
-			return -1;
-		}
-		outlen += f->start - last;
-		last = f->end;
-		outlen += f->len;
-		f++;
-	}
-
-	outlen += len - last;
-	return outlen;
-}
-
-static int mpatch_apply(char *buf, const char *orig, ssize_t len,
-	struct mpatch_flist *l)
-{
-	struct mpatch_frag *f = l->head;
-	int last = 0;
-	char *p = buf;
-
-	while (f != l->tail) {
-		if (f->start < last || f->end > len) {
-			if (!PyErr_Occurred())
-				PyErr_SetString(mpatch_Error,
-				                "invalid patch");
-			return 0;
-		}
-		memcpy(p, orig + last, f->start - last);
-		p += f->start - last;
-		memcpy(p, f->data, f->len);
-		last = f->end;
-		p += f->len;
-		f++;
-	}
-	memcpy(p, orig + last, len - last);
-	return 1;
-}
-
-/* recursively generate a patch of all bins between start and end */
-static struct mpatch_flist *mpatch_fold(PyObject *bins, ssize_t start,
-	ssize_t end)
-{
-	ssize_t len, blen;
-	const char *buffer;
-
-	if (start + 1 == end) {
-		/* trivial case, output a decoded list */
-		PyObject *tmp = PyList_GetItem(bins, start);
-		if (!tmp)
-			return NULL;
-		if (PyObject_AsCharBuffer(tmp, &buffer, &blen))
-			return NULL;
-		return mpatch_decode(buffer, blen);
-	}
-
-	/* divide and conquer, memory management is elsewhere */
-	len = (end - start) / 2;
-	return combine(mpatch_fold(bins, start, start + len),
-		       mpatch_fold(bins, start + len, end));
-}
-
 static PyObject *
 patches(PyObject *self, PyObject *args)
 {
 	PyObject *text, *bins, *result;
 	struct mpatch_flist *patch;
 	const char *in;
 	char *out;
 	Py_ssize_t len, outlen, inlen;
 
 	if (!PyArg_ParseTuple(args, "OO:mpatch", &text, &bins))
 		return NULL;
 
 	len = PyList_Size(bins);
 	if (!len) {
 		/* nothing to do */
 		Py_INCREF(text);
 		return text;
 	}
 
 	if (PyObject_AsCharBuffer(text, &in, &inlen))
 		return NULL;
 
 	patch = mpatch_fold(bins, 0, len);
 	if (!patch)
 		return NULL;
 
 	outlen = mpatch_calcsize(inlen, patch);
 	if (outlen < 0) {
 		result = NULL;
 		goto cleanup;
 	}
 	result = PyBytes_FromStringAndSize(NULL, outlen);
 	if (!result) {
 		result = NULL;
 		goto cleanup;
 	}
 	out = PyBytes_AsString(result);
 	if (!mpatch_apply(out, in, inlen, patch)) {
 		Py_DECREF(result);
 		result = NULL;
 	}
 cleanup:
 	mpatch_lfree(patch);
 	return result;
 }
 
 /* calculate size of a patched file directly */
 static PyObject *
 patchedsize(PyObject *self, PyObject *args)
 {
 	long orig, start, end, len, outlen = 0, last = 0, pos = 0;
 	Py_ssize_t patchlen;
 	char *bin;
 
 	if (!PyArg_ParseTuple(args, "ls#", &orig, &bin, &patchlen))
 		return NULL;
 
 	while (pos >= 0 && pos < patchlen) {
 		start = getbe32(bin + pos);
 		end = getbe32(bin + pos + 4);
 		len = getbe32(bin + pos + 8);
 		if (start > end)
 			break; /* sanity check */
 		pos += 12 + len;
 		outlen += start - last;
 		last = end;
 		outlen += len;
 	}
 
 	if (pos != patchlen) {
 		if (!PyErr_Occurred())
 			PyErr_SetString(mpatch_Error, "patch cannot be decoded");
 		return NULL;
 	}
 
 	outlen += orig - last;
 	return Py_BuildValue("l", outlen);
 }
 
 static PyMethodDef methods[] = {
 	{"patches", patches, METH_VARARGS, "apply a series of patches\n"},
 	{"patchedsize", patchedsize, METH_VARARGS, "calculed patched size\n"},
 	{NULL, NULL}
 };
 
 #ifdef IS_PY3K
 static struct PyModuleDef mpatch_module = {
 	PyModuleDef_HEAD_INIT,
 	"mpatch",
 	mpatch_doc,
 	-1,
 	methods
 };
 
 PyMODINIT_FUNC PyInit_mpatch(void)
 {
 	PyObject *m;
 
 	m = PyModule_Create(&mpatch_module);
 	if (m == NULL)
 		return NULL;
 
 	mpatch_Error = PyErr_NewException("mercurial.mpatch.mpatchError",
 					  NULL, NULL);
 	Py_INCREF(mpatch_Error);
 	PyModule_AddObject(m, "mpatchError", mpatch_Error);
 
 	return m;
 }
 #else
 PyMODINIT_FUNC
 initmpatch(void)
 {
 	Py_InitModule3("mpatch", methods, mpatch_doc);
 	mpatch_Error = PyErr_NewException("mercurial.mpatch.mpatchError",
 					  NULL, NULL);
 }
 #endif

setup.py

@@ -1,716 +1,717 b''
 #
 # This is the mercurial setup script.
 #
 # 'python setup.py install', or
 # 'python setup.py --help' for more options
 
 import sys, platform
 if getattr(sys, 'version_info', (0, 0, 0)) < (2, 6, 0, 'final'):
     raise SystemExit("Mercurial requires Python 2.6 or later.")
 
 if sys.version_info[0] >= 3:
     printf = eval('print')
     libdir_escape = 'unicode_escape'
 else:
     libdir_escape = 'string_escape'
     def printf(*args, **kwargs):
         f = kwargs.get('file', sys.stdout)
         end = kwargs.get('end', '\n')
         f.write(b' '.join(args) + end)
 
 # Solaris Python packaging brain damage
 try:
     import hashlib
     sha = hashlib.sha1()
 except ImportError:
     try:
         import sha
         sha.sha # silence unused import warning
     except ImportError:
         raise SystemExit(
             "Couldn't import standard hashlib (incomplete Python install).")
 
 try:
     import zlib
     zlib.compressobj # silence unused import warning
 except ImportError:
     raise SystemExit(
         "Couldn't import standard zlib (incomplete Python install).")
 
 # The base IronPython distribution (as of 2.7.1) doesn't support bz2
 isironpython = False
 try:
     isironpython = (platform.python_implementation()
                     .lower().find("ironpython") != -1)
 except AttributeError:
     pass
 
 if isironpython:
     sys.stderr.write("warning: IronPython detected (no bz2 support)\n")
 else:
     try:
         import bz2
         bz2.BZ2Compressor # silence unused import warning
     except ImportError:
         raise SystemExit(
             "Couldn't import standard bz2 (incomplete Python install).")
 
 ispypy = "PyPy" in sys.version
 
 import ctypes
 import os, stat, subprocess, time
 import re
 import shutil
 import tempfile
 from distutils import log
 if 'FORCE_SETUPTOOLS' in os.environ:
     from setuptools import setup
 else:
     from distutils.core import setup
 from distutils.core import Command, Extension
 from distutils.dist import Distribution
 from distutils.command.build import build
 from distutils.command.build_ext import build_ext
 from distutils.command.build_py import build_py
 from distutils.command.build_scripts import build_scripts
 from distutils.command.install_lib import install_lib
 from distutils.command.install_scripts import install_scripts
 from distutils.spawn import spawn, find_executable
 from distutils import file_util
 from distutils.errors import (
     CCompilerError,
     DistutilsError,
     DistutilsExecError,
 )
 from distutils.sysconfig import get_python_inc, get_config_var
 from distutils.version import StrictVersion
 
 scripts = ['hg']
 if os.name == 'nt':
     # We remove hg.bat if we are able to build hg.exe.
     scripts.append('contrib/win32/hg.bat')
 
 # simplified version of distutils.ccompiler.CCompiler.has_function
 # that actually removes its temporary files.
 def hasfunction(cc, funcname):
     tmpdir = tempfile.mkdtemp(prefix='hg-install-')
     devnull = oldstderr = None
     try:
         fname = os.path.join(tmpdir, 'funcname.c')
         f = open(fname, 'w')
         f.write('int main(void) {\n')
         f.write('    %s();\n' % funcname)
         f.write('}\n')
         f.close()
         # Redirect stderr to /dev/null to hide any error messages
         # from the compiler.
         # This will have to be changed if we ever have to check
         # for a function on Windows.
         devnull = open('/dev/null', 'w')
         oldstderr = os.dup(sys.stderr.fileno())
         os.dup2(devnull.fileno(), sys.stderr.fileno())
         objects = cc.compile([fname], output_dir=tmpdir)
         cc.link_executable(objects, os.path.join(tmpdir, "a.out"))
         return True
     except Exception:
         return False
     finally:
         if oldstderr is not None:
             os.dup2(oldstderr, sys.stderr.fileno())
         if devnull is not None:
             devnull.close()
         shutil.rmtree(tmpdir)
 
 # py2exe needs to be installed to work
 try:
     import py2exe
     py2exe.Distribution # silence unused import warning
     py2exeloaded = True
     # import py2exe's patched Distribution class
     from distutils.core import Distribution
 except ImportError:
     py2exeloaded = False
 
 def runcmd(cmd, env):
     if (sys.platform == 'plan9'
        and (sys.version_info[0] == 2 and sys.version_info[1] < 7)):
         # subprocess kludge to work around issues in half-baked Python
         # ports, notably bichued/python:
         _, out, err = os.popen3(cmd)
         return str(out), str(err)
     else:
         p = subprocess.Popen(cmd, stdout=subprocess.PIPE,
                              stderr=subprocess.PIPE, env=env)
         out, err = p.communicate()
         return out, err
 
 def runhg(cmd, env):
     out, err = runcmd(cmd, env)
     # If root is executing setup.py, but the repository is owned by
     # another user (as in "sudo python setup.py install") we will get
     # trust warnings since the .hg/hgrc file is untrusted. That is
     # fine, we don't want to load it anyway.  Python may warn about
     # a missing __init__.py in mercurial/locale, we also ignore that.
     err = [e for e in err.splitlines()
            if not e.startswith(b'not trusting file') \
               and not e.startswith(b'warning: Not importing') \
               and not e.startswith(b'obsolete feature not enabled')]
     if err:
         printf("stderr from '%s':" % (' '.join(cmd)), file=sys.stderr)
         printf(b'\n'.join([b'  ' + e for e in err]), file=sys.stderr)
         return ''
     return out
 
 version = ''
 
 # Execute hg out of this directory with a custom environment which takes care
 # to not use any hgrc files and do no localization.
 env = {'HGMODULEPOLICY': 'py',
        'HGRCPATH': '',
        'LANGUAGE': 'C'}
 if 'LD_LIBRARY_PATH' in os.environ:
     env['LD_LIBRARY_PATH'] = os.environ['LD_LIBRARY_PATH']
 if 'SystemRoot' in os.environ:
     # Copy SystemRoot into the custom environment for Python 2.6
     # under Windows. Otherwise, the subprocess will fail with
     # error 0xc0150004. See: http://bugs.python.org/issue3440
     env['SystemRoot'] = os.environ['SystemRoot']
 
 if os.path.isdir('.hg'):
     cmd = [sys.executable, 'hg', 'log', '-r', '.', '--template', '{tags}\n']
     numerictags = [t for t in runhg(cmd, env).split() if t[0].isdigit()]
     hgid = runhg([sys.executable, 'hg', 'id', '-i'], env).strip()
     if numerictags: # tag(s) found
         version = numerictags[-1]
         if hgid.endswith('+'): # propagate the dirty status to the tag
             version += '+'
     else: # no tag found
         ltagcmd = [sys.executable, 'hg', 'parents', '--template',
                    '{latesttag}']
         ltag = runhg(ltagcmd, env)
         changessincecmd = [sys.executable, 'hg', 'log', '-T', 'x\n', '-r',
                            "only(.,'%s')" % ltag]
         changessince = len(runhg(changessincecmd, env).splitlines())
         version = '%s+%s-%s' % (ltag, changessince, hgid)
     if version.endswith('+'):
         version += time.strftime('%Y%m%d')
 elif os.path.exists('.hg_archival.txt'):
     kw = dict([[t.strip() for t in l.split(':', 1)]
                for l in open('.hg_archival.txt')])
     if 'tag' in kw:
         version = kw['tag']
     elif 'latesttag' in kw:
         if 'changessincelatesttag' in kw:
             version = '%(latesttag)s+%(changessincelatesttag)s-%(node).12s' % kw
         else:
             version = '%(latesttag)s+%(latesttagdistance)s-%(node).12s' % kw
     else:
         version = kw.get('node', '')[:12]
 
 if version:
     with open("mercurial/__version__.py", "w") as f:
         f.write('# this file is autogenerated by setup.py\n')
         f.write('version = "%s"\n' % version)
 
 try:
     oldpolicy = os.environ.get('HGMODULEPOLICY', None)
     os.environ['HGMODULEPOLICY'] = 'py'
     from mercurial import __version__
     version = __version__.version
 except ImportError:
     version = 'unknown'
 finally:
     if oldpolicy is None:
         del os.environ['HGMODULEPOLICY']
     else:
         os.environ['HGMODULEPOLICY'] = oldpolicy
 
 class hgbuild(build):
     # Insert hgbuildmo first so that files in mercurial/locale/ are found
     # when build_py is run next.
     sub_commands = [('build_mo', None)] + build.sub_commands
 
 class hgbuildmo(build):
 
     description = "build translations (.mo files)"
 
     def run(self):
         if not find_executable('msgfmt'):
             self.warn("could not find msgfmt executable, no translations "
                      "will be built")
             return
 
         podir = 'i18n'
         if not os.path.isdir(podir):
             self.warn("could not find %s/ directory" % podir)
             return
 
         join = os.path.join
         for po in os.listdir(podir):
             if not po.endswith('.po'):
                 continue
             pofile = join(podir, po)
             modir = join('locale', po[:-3], 'LC_MESSAGES')
             mofile = join(modir, 'hg.mo')
             mobuildfile = join('mercurial', mofile)
             cmd = ['msgfmt', '-v', '-o', mobuildfile, pofile]
             if sys.platform != 'sunos5':
                 # msgfmt on Solaris does not know about -c
                 cmd.append('-c')
             self.mkpath(join('mercurial', modir))
             self.make_file([pofile], mobuildfile, spawn, (cmd,))
 
 
 class hgdist(Distribution):
     pure = False
     cffi = ispypy
 
     global_options = Distribution.global_options + \
                      [('pure', None, "use pure (slow) Python "
                         "code instead of C extensions"),
                      ]
 
     def has_ext_modules(self):
         # self.ext_modules is emptied in hgbuildpy.finalize_options which is
         # too late for some cases
         return not self.pure and Distribution.has_ext_modules(self)
 
 class hgbuildext(build_ext):
 
     def build_extension(self, ext):
         try:
             build_ext.build_extension(self, ext)
         except CCompilerError:
             if not getattr(ext, 'optional', False):
                 raise
             log.warn("Failed to build optional extension '%s' (skipping)",
                      ext.name)
 
 class hgbuildscripts(build_scripts):
     def run(self):
         if os.name != 'nt' or self.distribution.pure:
             return build_scripts.run(self)
 
         exebuilt = False
         try:
             self.run_command('build_hgexe')
             exebuilt = True
         except (DistutilsError, CCompilerError):
             log.warn('failed to build optional hg.exe')
 
         if exebuilt:
             # Copying hg.exe to the scripts build directory ensures it is
             # installed by the install_scripts command.
             hgexecommand = self.get_finalized_command('build_hgexe')
             dest = os.path.join(self.build_dir, 'hg.exe')
             self.mkpath(self.build_dir)
             self.copy_file(hgexecommand.hgexepath, dest)
 
             # Remove hg.bat because it is redundant with hg.exe.
             self.scripts.remove('contrib/win32/hg.bat')
 
         return build_scripts.run(self)
 
 class hgbuildpy(build_py):
     def finalize_options(self):
         build_py.finalize_options(self)
 
         if self.distribution.pure:
             self.distribution.ext_modules = []
         elif self.distribution.cffi:
             exts = []
             # cffi modules go here
             if sys.platform == 'darwin':
                 import setup_osutil_cffi
                 exts.append(setup_osutil_cffi.ffi.distutils_extension())
             self.distribution.ext_modules = exts
         else:
             h = os.path.join(get_python_inc(), 'Python.h')
             if not os.path.exists(h):
                 raise SystemExit('Python headers are required to build '
                                  'Mercurial but weren\'t found in %s' % h)
 
     def run(self):
         if self.distribution.pure:
             modulepolicy = 'py'
         else:
             modulepolicy = 'c'
         with open("mercurial/__modulepolicy__.py", "w") as f:
             f.write('# this file is autogenerated by setup.py\n')
             f.write('modulepolicy = "%s"\n' % modulepolicy)
 
         build_py.run(self)
 
 class buildhgextindex(Command):
     description = 'generate prebuilt index of hgext (for frozen package)'
     user_options = []
     _indexfilename = 'hgext/__index__.py'
 
     def initialize_options(self):
         pass
 
     def finalize_options(self):
         pass
 
     def run(self):
         if os.path.exists(self._indexfilename):
             with open(self._indexfilename, 'w') as f:
                 f.write('# empty\n')
 
         # here no extension enabled, disabled() lists up everything
         code = ('import pprint; from mercurial import extensions; '
                 'pprint.pprint(extensions.disabled())')
         out, err = runcmd([sys.executable, '-c', code], env)
         if err:
             raise DistutilsExecError(err)
 
         with open(self._indexfilename, 'w') as f:
             f.write('# this file is autogenerated by setup.py\n')
             f.write('docs = ')
             f.write(out)
 
 class buildhgexe(build_ext):
     description = 'compile hg.exe from mercurial/exewrapper.c'
 
     def build_extensions(self):
         if os.name != 'nt':
             return
         if isinstance(self.compiler, HackedMingw32CCompiler):
             self.compiler.compiler_so = self.compiler.compiler # no -mdll
             self.compiler.dll_libraries = [] # no -lmsrvc90
 
         # Different Python installs can have different Python library
         # names. e.g. the official CPython distribution uses pythonXY.dll
         # and MinGW uses libpythonX.Y.dll.
         _kernel32 = ctypes.windll.kernel32
         _kernel32.GetModuleFileNameA.argtypes = [ctypes.c_void_p,
                                                  ctypes.c_void_p,
                                                  ctypes.c_ulong]
         _kernel32.GetModuleFileNameA.restype = ctypes.c_ulong
         size = 1000
         buf = ctypes.create_string_buffer(size + 1)
         filelen = _kernel32.GetModuleFileNameA(sys.dllhandle, ctypes.byref(buf),
                                                size)
 
         if filelen > 0 and filelen != size:
             dllbasename = os.path.basename(buf.value)
             if not dllbasename.lower().endswith('.dll'):
                 raise SystemExit('Python DLL does not end with .dll: %s' %
                                  dllbasename)
             pythonlib = dllbasename[:-4]
         else:
             log.warn('could not determine Python DLL filename; '
                      'assuming pythonXY')
 
             hv = sys.hexversion
             pythonlib = 'python%d%d' % (hv >> 24, (hv >> 16) & 0xff)
 
         log.info('using %s as Python library name' % pythonlib)
         with open('mercurial/hgpythonlib.h', 'wb') as f:
             f.write('/* this file is autogenerated by setup.py */\n')
             f.write('#define HGPYTHONLIB "%s"\n' % pythonlib)
         objects = self.compiler.compile(['mercurial/exewrapper.c'],
                                          output_dir=self.build_temp)
         dir = os.path.dirname(self.get_ext_fullpath('dummy'))
         target = os.path.join(dir, 'hg')
         self.compiler.link_executable(objects, target,
                                       libraries=[],
                                       output_dir=self.build_temp)
 
     @property
     def hgexepath(self):
         dir = os.path.dirname(self.get_ext_fullpath('dummy'))
         return os.path.join(self.build_temp, dir, 'hg.exe')
 
 class hginstalllib(install_lib):
     '''
     This is a specialization of install_lib that replaces the copy_file used
     there so that it supports setting the mode of files after copying them,
     instead of just preserving the mode that the files originally had.  If your
     system has a umask of something like 027, preserving the permissions when
     copying will lead to a broken install.
 
     Note that just passing keep_permissions=False to copy_file would be
     insufficient, as it might still be applying a umask.
     '''
 
     def run(self):
         realcopyfile = file_util.copy_file
         def copyfileandsetmode(*args, **kwargs):
             src, dst = args[0], args[1]
             dst, copied = realcopyfile(*args, **kwargs)
             if copied:
                 st = os.stat(src)
                 # Persist executable bit (apply it to group and other if user
                 # has it)
                 if st[stat.ST_MODE] & stat.S_IXUSR:
                     setmode = int('0755', 8)
                 else:
                     setmode = int('0644', 8)
                 m = stat.S_IMODE(st[stat.ST_MODE])
                 m = (m & ~int('0777', 8)) | setmode
                 os.chmod(dst, m)
         file_util.copy_file = copyfileandsetmode
         try:
             install_lib.run(self)
         finally:
             file_util.copy_file = realcopyfile
 
 class hginstallscripts(install_scripts):
     '''
     This is a specialization of install_scripts that replaces the @LIBDIR@ with
     the configured directory for modules. If possible, the path is made relative
     to the directory for scripts.
     '''
 
     def initialize_options(self):
         install_scripts.initialize_options(self)
 
         self.install_lib = None
 
     def finalize_options(self):
         install_scripts.finalize_options(self)
         self.set_undefined_options('install',
                                    ('install_lib', 'install_lib'))
 
     def run(self):
         install_scripts.run(self)
 
         # It only makes sense to replace @LIBDIR@ with the install path if
         # the install path is known. For wheels, the logic below calculates
         # the libdir to be "../..". This is because the internal layout of a
         # wheel archive looks like:
         #
         #   mercurial-3.6.1.data/scripts/hg
         #   mercurial/__init__.py
         #
         # When installing wheels, the subdirectories of the "<pkg>.data"
         # directory are translated to system local paths and files therein
         # are copied in place. The mercurial/* files are installed into the
         # site-packages directory. However, the site-packages directory
         # isn't known until wheel install time. This means we have no clue
         # at wheel generation time what the installed site-packages directory
         # will be. And, wheels don't appear to provide the ability to register
         # custom code to run during wheel installation. This all means that
         # we can't reliably set the libdir in wheels: the default behavior
         # of looking in sys.path must do.
 
         if (os.path.splitdrive(self.install_dir)[0] !=
             os.path.splitdrive(self.install_lib)[0]):
             # can't make relative paths from one drive to another, so use an
             # absolute path instead
             libdir = self.install_lib
         else:
             common = os.path.commonprefix((self.install_dir, self.install_lib))
             rest = self.install_dir[len(common):]
             uplevel = len([n for n in os.path.split(rest) if n])
 
             libdir = uplevel * ('..' + os.sep) + self.install_lib[len(common):]
 
         for outfile in self.outfiles:
             with open(outfile, 'rb') as fp:
                 data = fp.read()
 
             # skip binary files
             if b'\0' in data:
                 continue
 
             # During local installs, the shebang will be rewritten to the final
             # install path. During wheel packaging, the shebang has a special
             # value.
             if data.startswith(b'#!python'):
                 log.info('not rewriting @LIBDIR@ in %s because install path '
                          'not known' % outfile)
                 continue
 
             data = data.replace(b'@LIBDIR@', libdir.encode(libdir_escape))
             with open(outfile, 'wb') as fp:
                 fp.write(data)
 
 cmdclass = {'build': hgbuild,
             'build_mo': hgbuildmo,
             'build_ext': hgbuildext,
             'build_py': hgbuildpy,
             'build_scripts': hgbuildscripts,
             'build_hgextindex': buildhgextindex,
             'install_lib': hginstalllib,
             'install_scripts': hginstallscripts,
             'build_hgexe': buildhgexe,
             }
 
 packages = ['mercurial', 'mercurial.hgweb', 'mercurial.httpclient',
             'mercurial.pure',
             'hgext', 'hgext.convert', 'hgext.fsmonitor',
             'hgext.fsmonitor.pywatchman', 'hgext.highlight',
             'hgext.largefiles', 'hgext.zeroconf', 'hgext3rd']
 
 common_depends = ['mercurial/bitmanipulation.h',
                   'mercurial/compat.h',
                   'mercurial/util.h']
 
 osutil_ldflags = []
 
 if sys.platform == 'darwin':
     osutil_ldflags += ['-framework', 'ApplicationServices']
 
 extmodules = [
     Extension('mercurial.base85', ['mercurial/base85.c'],
               depends=common_depends),
     Extension('mercurial.bdiff', ['mercurial/bdiff.c',
                                   'mercurial/bdiff_module.c'],
               depends=common_depends + ['mercurial/bdiff.h']),
     Extension('mercurial.diffhelpers', ['mercurial/diffhelpers.c'],
               depends=common_depends),
-    Extension('mercurial.mpatch', ['mercurial/mpatch.c'],
+    Extension('mercurial.mpatch', ['mercurial/mpatch.c',
+                                   'mercurial/mpatch_module.c'],
               depends=common_depends),
     Extension('mercurial.parsers', ['mercurial/dirs.c',
                                     'mercurial/manifest.c',
                                     'mercurial/parsers.c',
                                     'mercurial/pathencode.c'],
               depends=common_depends),
     Extension('mercurial.osutil', ['mercurial/osutil.c'],
               extra_link_args=osutil_ldflags,
               depends=common_depends),
     Extension('hgext.fsmonitor.pywatchman.bser',
               ['hgext/fsmonitor/pywatchman/bser.c']),
     ]
 
 try:
     from distutils import cygwinccompiler
 
     # the -mno-cygwin option has been deprecated for years
     compiler = cygwinccompiler.Mingw32CCompiler
 
     class HackedMingw32CCompiler(cygwinccompiler.Mingw32CCompiler):
         def __init__(self, *args, **kwargs):
             compiler.__init__(self, *args, **kwargs)
             for i in 'compiler compiler_so linker_exe linker_so'.split():
                 try:
                     getattr(self, i).remove('-mno-cygwin')
                 except ValueError:
                     pass
 
     cygwinccompiler.Mingw32CCompiler = HackedMingw32CCompiler
 except ImportError:
     # the cygwinccompiler package is not available on some Python
     # distributions like the ones from the optware project for Synology
     # DiskStation boxes
     class HackedMingw32CCompiler(object):
         pass
 
 packagedata = {'mercurial': ['locale/*/LC_MESSAGES/hg.mo',
                              'help/*.txt',
                              'help/internals/*.txt',
                              'default.d/*.rc',
                              'dummycert.pem']}
 
 def ordinarypath(p):
     return p and p[0] != '.' and p[-1] != '~'
 
 for root in ('templates',):
     for curdir, dirs, files in os.walk(os.path.join('mercurial', root)):
         curdir = curdir.split(os.sep, 1)[1]
         dirs[:] = filter(ordinarypath, dirs)
         for f in filter(ordinarypath, files):
             f = os.path.join(curdir, f)
             packagedata['mercurial'].append(f)
 
 datafiles = []
 setupversion = version
 extra = {}
 
 if py2exeloaded:
     extra['console'] = [
         {'script':'hg',
          'copyright':'Copyright (C) 2005-2016 Matt Mackall and others',
          'product_version':version}]
     # sub command of 'build' because 'py2exe' does not handle sub_commands
     build.sub_commands.insert(0, ('build_hgextindex', None))
     # put dlls in sub directory so that they won't pollute PATH
     extra['zipfile'] = 'lib/library.zip'
 
 if os.name == 'nt':
     # Windows binary file versions for exe/dll files must have the
     # form W.X.Y.Z, where W,X,Y,Z are numbers in the range 0..65535
     setupversion = version.split('+', 1)[0]
 
 if sys.platform == 'darwin' and os.path.exists('/usr/bin/xcodebuild'):
     version = runcmd(['/usr/bin/xcodebuild', '-version'], {})[0].splitlines()
     if version:
         version = version[0]
         if sys.version_info[0] == 3:
             version = version.decode('utf-8')
         xcode4 = (version.startswith('Xcode') and
                   StrictVersion(version.split()[1]) >= StrictVersion('4.0'))
         xcode51 = re.match(r'^Xcode\s+5\.1', version) is not None
     else:
         # xcodebuild returns empty on OS X Lion with XCode 4.3 not
         # installed, but instead with only command-line tools. Assume
         # that only happens on >= Lion, thus no PPC support.
         xcode4 = True
         xcode51 = False
 
     # XCode 4.0 dropped support for ppc architecture, which is hardcoded in
     # distutils.sysconfig
     if xcode4:
         os.environ['ARCHFLAGS'] = ''
 
     # XCode 5.1 changes clang such that it now fails to compile if the
     # -mno-fused-madd flag is passed, but the version of Python shipped with
     # OS X 10.9 Mavericks includes this flag. This causes problems in all
     # C extension modules, and a bug has been filed upstream at
     # http://bugs.python.org/issue21244. We also need to patch this here
     # so Mercurial can continue to compile in the meantime.
     if xcode51:
         cflags = get_config_var('CFLAGS')
         if cflags and re.search(r'-mno-fused-madd\b', cflags) is not None:
             os.environ['CFLAGS'] = (
                 os.environ.get('CFLAGS', '') + ' -Qunused-arguments')
 
 setup(name='mercurial',
       version=setupversion,
       author='Matt Mackall and many others',
       author_email='[e-mail]',
       url='https://mercurial-scm.org/',
       download_url='https://mercurial-scm.org/release/',
       description=('Fast scalable distributed SCM (revision control, version '
                    'control) system'),
       long_description=('Mercurial is a distributed SCM tool written in Python.'
                         ' It is used by a number of large projects that require'
                         ' fast, reliable distributed revision control, such as '
                         'Mozilla.'),
       license='GNU GPLv2 or any later version',
       classifiers=[
           'Development Status :: 6 - Mature',
           'Environment :: Console',
           'Intended Audience :: Developers',
           'Intended Audience :: System Administrators',
           'License :: OSI Approved :: GNU General Public License (GPL)',
           'Natural Language :: Danish',
           'Natural Language :: English',
           'Natural Language :: German',
           'Natural Language :: Italian',
           'Natural Language :: Japanese',
           'Natural Language :: Portuguese (Brazilian)',
           'Operating System :: Microsoft :: Windows',
           'Operating System :: OS Independent',
           'Operating System :: POSIX',
           'Programming Language :: C',
           'Programming Language :: Python',
           'Topic :: Software Development :: Version Control',
       ],
       scripts=scripts,
       packages=packages,
       ext_modules=extmodules,
       data_files=datafiles,
       package_data=packagedata,
       cmdclass=cmdclass,
       distclass=hgdist,
       options={'py2exe': {'packages': ['hgext', 'email']},
                'bdist_mpkg': {'zipdist': False,
                               'license': 'COPYING',
                               'readme': 'contrib/macosx/Readme.html',
                               'welcome': 'contrib/macosx/Welcome.html',
                               },
                },
       **extra)