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294 lines (248 loc) · 9.63 KB
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Copy pathpatch.c
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294 lines (248 loc) · 9.63 KB
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/*
* Copyright 2010-2025 The pygit2 contributors
*
* This file is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, version 2,
* as published by the Free Software Foundation.
*
* In addition to the permissions in the GNU General Public License,
* the authors give you unlimited permission to link the compiled
* version of this file into combinations with other programs,
* and to distribute those combinations without any restriction
* coming from the use of this file. (The General Public License
* restrictions do apply in other respects; for example, they cover
* modification of the file, and distribution when not linked into
* a combined executable.)
*
* This file is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#define PY_SSIZE_T_CLEAN
#include <Python.h>
#include <structmember.h>
#include "diff.h"
#include "error.h"
#include "object.h"
#include "oid.h"
#include "types.h"
#include "utils.h"
extern PyTypeObject DiffHunkType;
extern PyTypeObject BlobType;
PyTypeObject PatchType;
PyObject *
wrap_patch(git_patch *patch, Blob *oldblob, Blob *newblob)
{
Patch *py_patch;
assert(patch);
py_patch = PyObject_New(Patch, &PatchType);
if (py_patch) {
py_patch->patch = patch;
Py_XINCREF(oldblob);
py_patch->oldblob = oldblob;
Py_XINCREF(newblob);
py_patch->newblob = newblob;
}
return (PyObject*) py_patch;
}
static void
Patch_dealloc(Patch *self)
{
Py_CLEAR(self->oldblob);
Py_CLEAR(self->newblob);
git_patch_free(self->patch);
PyObject_Del(self);
}
PyDoc_STRVAR(Patch_delta__doc__, "Get the delta associated with a patch.");
PyObject *
Patch_delta__get__(Patch *self)
{
assert(self->patch);
return wrap_diff_delta(git_patch_get_delta(self->patch));
}
PyDoc_STRVAR(Patch_line_stats__doc__,
"Get line counts of each type in a patch (context, additions, deletions).");
PyObject *
Patch_line_stats__get__(Patch *self)
{
size_t context, additions, deletions;
int err;
assert(self->patch);
err = git_patch_line_stats(&context, &additions, &deletions, self->patch);
if (err < 0)
return Error_set(err);
return Py_BuildValue("III", context, additions, deletions);
}
PyDoc_STRVAR(Patch_create_from__doc__,
"Create a patch from blobs, buffers, or a blob and a buffer");
static PyObject *
Patch_create_from(PyObject *self, PyObject *args, PyObject *kwds)
{
/* A generic wrapper around
* git_patch_from_blob_and_buffer
* git_patch_from_buffers
* git_patch_from_blobs
*/
git_diff_options opts = GIT_DIFF_OPTIONS_INIT;
git_patch *patch;
char *old_as_path = NULL, *new_as_path = NULL;
PyObject *oldobj = NULL, *newobj = NULL;
Blob *oldblob = NULL, *newblob = NULL;
const char *oldbuf = NULL, *newbuf = NULL;
Py_ssize_t oldbuflen, newbuflen;
int err;
char *keywords[] = {"old", "new", "old_as_path", "new_as_path",
"flag", "context_lines", "interhunk_lines",
NULL};
if (!PyArg_ParseTupleAndKeywords(args, kwds, "OO|zzIHH", keywords,
&oldobj, &newobj, &old_as_path, &new_as_path,
&opts.flags, &opts.context_lines,
&opts.interhunk_lines))
return NULL;
if (oldobj != Py_None && PyObject_TypeCheck(oldobj, &BlobType))
{
/* The old object exists and is a blob */
oldblob = (Blob*)oldobj;
if (Object__load((Object*)oldblob) == NULL) { return NULL; } // Lazy load
if (newobj != Py_None && PyObject_TypeCheck(newobj, &BlobType))
{
/* The new object exists and is a blob */
newblob = (Blob*)newobj;
if (Object__load((Object*)newblob) == NULL) { return NULL; } // Lazy load
err = git_patch_from_blobs(&patch, oldblob->blob, old_as_path,
newblob->blob, new_as_path, &opts);
}
else {
/* The new object does not exist or is a buffer */
if (!PyArg_Parse(newobj, "z#", &newbuf, &newbuflen))
return NULL;
err = git_patch_from_blob_and_buffer(&patch, oldblob->blob, old_as_path,
newbuf, newbuflen, new_as_path,
&opts);
}
}
else
{
/* The old object does exist and is a buffer */
if (!PyArg_Parse(oldobj, "z#", &oldbuf, &oldbuflen))
return NULL;
if (!PyArg_Parse(newobj, "z#", &newbuf, &newbuflen))
return NULL;
err = git_patch_from_buffers(&patch, oldbuf, oldbuflen, old_as_path,
newbuf, newbuflen, new_as_path, &opts);
}
if (err < 0)
return Error_set(err);
return wrap_patch(patch, oldblob, newblob);
}
PyDoc_STRVAR(Patch_data__doc__, "The raw bytes of the patch's contents.");
PyObject *
Patch_data__get__(Patch *self)
{
git_buf buf = {NULL};
int err;
PyObject *bytes;
assert(self->patch);
err = git_patch_to_buf(&buf, self->patch);
if (err < 0)
return Error_set(err);
bytes = PyBytes_FromStringAndSize(buf.ptr, buf.size);
git_buf_dispose(&buf);
return bytes;
}
PyDoc_STRVAR(Patch_text__doc__,
"Patch diff string. Can be None in some cases, such as empty commits.\n"
"Note that this decodes the content to Unicode assuming UTF-8 encoding. "
"For non-UTF-8 content that can lead be a lossy, non-reversible process. "
"To access the raw, un-decoded patch, use `patch.data`.");
PyObject *
Patch_text__get__(Patch *self)
{
git_buf buf = {NULL};
int err;
PyObject *text;
assert(self->patch);
err = git_patch_to_buf(&buf, self->patch);
if (err < 0)
return Error_set(err);
text = to_unicode_n(buf.ptr, buf.size, NULL, NULL);
git_buf_dispose(&buf);
return text;
}
PyDoc_STRVAR(Patch_hunks__doc__, "hunks");
PyObject *
Patch_hunks__get__(Patch *self)
{
size_t i, hunk_amounts;
PyObject *py_hunks;
PyObject *py_hunk;
hunk_amounts = git_patch_num_hunks(self->patch);
py_hunks = PyList_New(hunk_amounts);
for (i = 0; i < hunk_amounts; i++) {
py_hunk = wrap_diff_hunk(self, i);
if (py_hunk == NULL)
return NULL;
PyList_SET_ITEM((PyObject*) py_hunks, i, py_hunk);
}
return py_hunks;
}
static PyMethodDef Patch_methods[] = {
{"create_from", (PyCFunction) Patch_create_from,
METH_KEYWORDS | METH_VARARGS | METH_STATIC, Patch_create_from__doc__},
{NULL}
};
PyGetSetDef Patch_getsetters[] = {
GETTER(Patch, delta),
GETTER(Patch, line_stats),
GETTER(Patch, data),
GETTER(Patch, text),
GETTER(Patch, hunks),
{NULL}
};
PyDoc_STRVAR(Patch__doc__, "Diff patch object.");
PyTypeObject PatchType = {
PyVarObject_HEAD_INIT(NULL, 0)
"_pygit2.Patch", /* tp_name */
sizeof(Patch), /* tp_basicsize */
0, /* tp_itemsize */
(destructor)Patch_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 */
Patch__doc__, /* tp_doc */
0, /* tp_traverse */
0, /* tp_clear */
0, /* tp_richcompare */
0, /* tp_weaklistoffset */
0, /* tp_iter */
0, /* tp_iternext */
Patch_methods, /* tp_methods */
0, /* tp_members */
Patch_getsetters, /* 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 */
0, /* tp_new */
};
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