largefiles: remove meaningless code path for "hg pull --rebase"
This patch removes "--rebase" specific code path for "hg pull" in
"overridepull", because previous patch makes it meaningless: now,
"rebase.rebase" ("orig" invocation in this patch) can
update/commit largefiles safely without "repo._isrebasing = True".
As a side effect of removing "rebase.rebase" invocation in
"overridepull", this patch removes "nothing to rebase ..." message in
"test-largefiles.t", which is shown only when rebase extension is
enabled AFTER largefiles:
before this patch:
1. "dispatch" invokes "pullrebase" of rebase as "hg pull" at
first, because rebase wraps "hg pull" later
2. "pullrebase" invokes "overridepull" of largefiles as "orig",
even though rebase assumes that "orig" is "pull" of commands
3. "overridepull" executes "pull" and "rebase" directly
3.1 "pull" pulls changesets and creates new head "X"
3.2 "rebase" rebases current working parent "Y" on "X"
4. "overridepull" returns to "pullrebase"
5. "pullrebase" tries to rebase, but there is nothing to be done,
because "Y" is already rebased on "X". then, it shows "nothing
to rebase ..."
after this patch:
1. "dispatch" invokes "pullrebase" of rebase as "hg pull"
2. "pullrebase" invokes "overridepull" of largefiles as "orig"
3. "overridepull" executes "pull" as "orig"
4. "overridepull" returns to "pullrebase"
5. revision "Y" is not yet rebased, so "pullrebase" doesn't shows
"nothing to rebase ..."
As another side effect of removing "rebase.rebase" invocation, this
patch fixes issue3861, which occurs only when rebase extension is
enabled BEFORE largefiles:
before this patch:
1. "dispatch" invokes "overridepull" of largefiles at first,
because largefiles wrap "hg pull" later
2. "overridepull" executes "pull" and "rebase" explicitly
2.1 "pull" pulls changesets and creates new head "X"
2.2 "rebase" rebases current working parent, but fails because
no revision is checked out in issue3861 case
3. "overridepull" returns to "dispatch" with exit code 1 returned
from "rebase" at (2.2)
4. "hg pull" terminates with exit code 1 unexpectedly
after this patch:
1. "dispatch" invokes "overridepull" of largefiles at first
2. "overridepull" invokes "pullrebase" of rebase as "orig"
3. "pullrebase" invokes "pull" as "orig"
4. "pullrebase" invokes "rebase", and it fails
5. "pullrebase" returns to "overridepull" with exit code 0
(because "pullrebase" ignores result of "pull" and "rebase")
6. "overridepull" returns to "dispatch" with exit code 0 returned
from "rebase" at (5)
7. "hg pull" terminates with exit code 0
/*
* diffhelpers.c - helper routines for mpatch
*
* Copyright 2007 Chris Mason <chris.mason@oracle.com>
*
* This software may be used and distributed according to the terms
* of the GNU General Public License v2, incorporated herein by reference.
*/
#include <Python.h>
#include <stdlib.h>
#include <string.h>
#include "util.h"
static char diffhelpers_doc[] = "Efficient diff parsing";
static PyObject *diffhelpers_Error;
/* fixup the last lines of a and b when the patch has no newline at eof */
static void _fix_newline(PyObject *hunk, PyObject *a, PyObject *b)
{
Py_ssize_t hunksz = PyList_Size(hunk);
PyObject *s = PyList_GET_ITEM(hunk, hunksz-1);
char *l = PyBytes_AsString(s);
Py_ssize_t alen = PyList_Size(a);
Py_ssize_t blen = PyList_Size(b);
char c = l[0];
PyObject *hline;
Py_ssize_t sz = PyBytes_GET_SIZE(s);
if (sz > 1 && l[sz-2] == '\r')
/* tolerate CRLF in last line */
sz -= 1;
hline = PyBytes_FromStringAndSize(l, sz-1);
if (c == ' ' || c == '+') {
PyObject *rline = PyBytes_FromStringAndSize(l + 1, sz - 2);
PyList_SetItem(b, blen-1, rline);
}
if (c == ' ' || c == '-') {
Py_INCREF(hline);
PyList_SetItem(a, alen-1, hline);
}
PyList_SetItem(hunk, hunksz-1, hline);
}
/* python callable form of _fix_newline */
static PyObject *
fix_newline(PyObject *self, PyObject *args)
{
PyObject *hunk, *a, *b;
if (!PyArg_ParseTuple(args, "OOO", &hunk, &a, &b))
return NULL;
_fix_newline(hunk, a, b);
return Py_BuildValue("l", 0);
}
#if (PY_VERSION_HEX < 0x02050000)
static const char *addlines_format = "OOiiOO";
#else
static const char *addlines_format = "OOnnOO";
#endif
/*
* read lines from fp into the hunk. The hunk is parsed into two arrays
* a and b. a gets the old state of the text, b gets the new state
* The control char from the hunk is saved when inserting into a, but not b
* (for performance while deleting files)
*/
static PyObject *
addlines(PyObject *self, PyObject *args)
{
PyObject *fp, *hunk, *a, *b, *x;
Py_ssize_t i;
Py_ssize_t lena, lenb;
Py_ssize_t num;
Py_ssize_t todoa, todob;
char *s, c;
PyObject *l;
if (!PyArg_ParseTuple(args, addlines_format,
&fp, &hunk, &lena, &lenb, &a, &b))
return NULL;
while (1) {
todoa = lena - PyList_Size(a);
todob = lenb - PyList_Size(b);
num = todoa > todob ? todoa : todob;
if (num == 0)
break;
for (i = 0; i < num; i++) {
x = PyFile_GetLine(fp, 0);
s = PyBytes_AsString(x);
c = *s;
if (strcmp(s, "\\ No newline at end of file\n") == 0) {
_fix_newline(hunk, a, b);
continue;
}
if (c == '\n') {
/* Some patches may be missing the control char
* on empty lines. Supply a leading space. */
Py_DECREF(x);
x = PyBytes_FromString(" \n");
}
PyList_Append(hunk, x);
if (c == '+') {
l = PyBytes_FromString(s + 1);
PyList_Append(b, l);
Py_DECREF(l);
} else if (c == '-') {
PyList_Append(a, x);
} else {
l = PyBytes_FromString(s + 1);
PyList_Append(b, l);
Py_DECREF(l);
PyList_Append(a, x);
}
Py_DECREF(x);
}
}
return Py_BuildValue("l", 0);
}
/*
* compare the lines in a with the lines in b. a is assumed to have
* a control char at the start of each line, this char is ignored in the
* compare
*/
static PyObject *
testhunk(PyObject *self, PyObject *args)
{
PyObject *a, *b;
long bstart;
Py_ssize_t alen, blen;
Py_ssize_t i;
char *sa, *sb;
if (!PyArg_ParseTuple(args, "OOl", &a, &b, &bstart))
return NULL;
alen = PyList_Size(a);
blen = PyList_Size(b);
if (alen > blen - bstart || bstart < 0) {
return Py_BuildValue("l", -1);
}
for (i = 0; i < alen; i++) {
sa = PyBytes_AsString(PyList_GET_ITEM(a, i));
sb = PyBytes_AsString(PyList_GET_ITEM(b, i + bstart));
if (strcmp(sa + 1, sb) != 0)
return Py_BuildValue("l", -1);
}
return Py_BuildValue("l", 0);
}
static PyMethodDef methods[] = {
{"addlines", addlines, METH_VARARGS, "add lines to a hunk\n"},
{"fix_newline", fix_newline, METH_VARARGS, "fixup newline counters\n"},
{"testhunk", testhunk, METH_VARARGS, "test lines in a hunk\n"},
{NULL, NULL}
};
#ifdef IS_PY3K
static struct PyModuleDef diffhelpers_module = {
PyModuleDef_HEAD_INIT,
"diffhelpers",
diffhelpers_doc,
-1,
methods
};
PyMODINIT_FUNC PyInit_diffhelpers(void)
{
PyObject *m;
m = PyModule_Create(&diffhelpers_module);
if (m == NULL)
return NULL;
diffhelpers_Error = PyErr_NewException("diffhelpers.diffhelpersError",
NULL, NULL);
Py_INCREF(diffhelpers_Error);
PyModule_AddObject(m, "diffhelpersError", diffhelpers_Error);
return m;
}
#else
PyMODINIT_FUNC
initdiffhelpers(void)
{
Py_InitModule3("diffhelpers", methods, diffhelpers_doc);
diffhelpers_Error = PyErr_NewException("diffhelpers.diffhelpersError",
NULL, NULL);
}
#endif