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-rw-r--r--src/apply.c898
1 files changed, 0 insertions, 898 deletions
diff --git a/src/apply.c b/src/apply.c
deleted file mode 100644
index 7c65cd79d..000000000
--- a/src/apply.c
+++ /dev/null
@@ -1,898 +0,0 @@
-/*
- * Copyright (C) the libgit2 contributors. All rights reserved.
- *
- * This file is part of libgit2, distributed under the GNU GPL v2 with
- * a Linking Exception. For full terms see the included COPYING file.
- */
-
-#include "git2/apply.h"
-#include "git2/patch.h"
-#include "git2/filter.h"
-#include "git2/blob.h"
-#include "git2/index.h"
-#include "git2/checkout.h"
-#include "git2/repository.h"
-#include "array.h"
-#include "patch.h"
-#include "futils.h"
-#include "delta.h"
-#include "zstream.h"
-#include "reader.h"
-#include "index.h"
-#include "apply.h"
-
-typedef struct {
- /* The lines that we allocate ourself are allocated out of the pool.
- * (Lines may have been allocated out of the diff.)
- */
- git_pool pool;
- git_vector lines;
-} patch_image;
-
-static int apply_err(const char *fmt, ...) GIT_FORMAT_PRINTF(1, 2);
-static int apply_err(const char *fmt, ...)
-{
- va_list ap;
-
- va_start(ap, fmt);
- git_error_vset(GIT_ERROR_PATCH, fmt, ap);
- va_end(ap);
-
- return GIT_EAPPLYFAIL;
-}
-
-static void patch_line_init(
- git_diff_line *out,
- const char *in,
- size_t in_len,
- size_t in_offset)
-{
- out->content = in;
- out->content_len = in_len;
- out->content_offset = in_offset;
-}
-
-#define PATCH_IMAGE_INIT { GIT_POOL_INIT, GIT_VECTOR_INIT }
-
-static int patch_image_init_fromstr(
- patch_image *out, const char *in, size_t in_len)
-{
- git_diff_line *line;
- const char *start, *end;
-
- memset(out, 0x0, sizeof(patch_image));
-
- if (git_pool_init(&out->pool, sizeof(git_diff_line)) < 0)
- return -1;
-
- if (!in_len)
- return 0;
-
- for (start = in; start < in + in_len; start = end) {
- end = memchr(start, '\n', in_len - (start - in));
-
- if (end == NULL)
- end = in + in_len;
-
- else if (end < in + in_len)
- end++;
-
- line = git_pool_mallocz(&out->pool, 1);
- GIT_ERROR_CHECK_ALLOC(line);
-
- if (git_vector_insert(&out->lines, line) < 0)
- return -1;
-
- patch_line_init(line, start, (end - start), (start - in));
- }
-
- return 0;
-}
-
-static void patch_image_free(patch_image *image)
-{
- if (image == NULL)
- return;
-
- git_pool_clear(&image->pool);
- git_vector_free(&image->lines);
-}
-
-static bool match_hunk(
- patch_image *image,
- patch_image *preimage,
- size_t linenum)
-{
- bool match = 0;
- size_t i;
-
- /* Ensure this hunk is within the image boundaries. */
- if (git_vector_length(&preimage->lines) + linenum >
- git_vector_length(&image->lines))
- return 0;
-
- match = 1;
-
- /* Check exact match. */
- for (i = 0; i < git_vector_length(&preimage->lines); i++) {
- git_diff_line *preimage_line = git_vector_get(&preimage->lines, i);
- git_diff_line *image_line = git_vector_get(&image->lines, linenum + i);
-
- if (preimage_line->content_len != image_line->content_len ||
- memcmp(preimage_line->content, image_line->content, image_line->content_len) != 0) {
- match = 0;
- break;
- }
- }
-
- return match;
-}
-
-static bool find_hunk_linenum(
- size_t *out,
- patch_image *image,
- patch_image *preimage,
- size_t linenum)
-{
- size_t max = git_vector_length(&image->lines);
- bool match;
-
- if (linenum > max)
- linenum = max;
-
- match = match_hunk(image, preimage, linenum);
-
- *out = linenum;
- return match;
-}
-
-static int update_hunk(
- patch_image *image,
- size_t linenum,
- patch_image *preimage,
- patch_image *postimage)
-{
- size_t postlen = git_vector_length(&postimage->lines);
- size_t prelen = git_vector_length(&preimage->lines);
- size_t i;
- int error = 0;
-
- if (postlen > prelen)
- error = git_vector_insert_null(
- &image->lines, linenum, (postlen - prelen));
- else if (prelen > postlen)
- error = git_vector_remove_range(
- &image->lines, linenum, (prelen - postlen));
-
- if (error) {
- git_error_set_oom();
- return -1;
- }
-
- for (i = 0; i < git_vector_length(&postimage->lines); i++) {
- image->lines.contents[linenum + i] =
- git_vector_get(&postimage->lines, i);
- }
-
- return 0;
-}
-
-typedef struct {
- git_apply_options opts;
- size_t skipped_new_lines;
- size_t skipped_old_lines;
-} apply_hunks_ctx;
-
-static int apply_hunk(
- patch_image *image,
- git_patch *patch,
- git_patch_hunk *hunk,
- apply_hunks_ctx *ctx)
-{
- patch_image preimage = PATCH_IMAGE_INIT, postimage = PATCH_IMAGE_INIT;
- size_t line_num, i;
- int error = 0;
-
- if (ctx->opts.hunk_cb) {
- error = ctx->opts.hunk_cb(&hunk->hunk, ctx->opts.payload);
-
- if (error) {
- if (error > 0) {
- ctx->skipped_new_lines += hunk->hunk.new_lines;
- ctx->skipped_old_lines += hunk->hunk.old_lines;
- error = 0;
- }
-
- goto done;
- }
- }
-
- for (i = 0; i < hunk->line_count; i++) {
- size_t linenum = hunk->line_start + i;
- git_diff_line *line = git_array_get(patch->lines, linenum), *prev;
-
- if (!line) {
- error = apply_err("preimage does not contain line %"PRIuZ, linenum);
- goto done;
- }
-
- switch (line->origin) {
- case GIT_DIFF_LINE_CONTEXT_EOFNL:
- case GIT_DIFF_LINE_DEL_EOFNL:
- case GIT_DIFF_LINE_ADD_EOFNL:
- prev = i ? git_array_get(patch->lines, linenum - 1) : NULL;
- if (prev && prev->content[prev->content_len - 1] == '\n')
- prev->content_len -= 1;
- break;
- case GIT_DIFF_LINE_CONTEXT:
- if ((error = git_vector_insert(&preimage.lines, line)) < 0 ||
- (error = git_vector_insert(&postimage.lines, line)) < 0)
- goto done;
- break;
- case GIT_DIFF_LINE_DELETION:
- if ((error = git_vector_insert(&preimage.lines, line)) < 0)
- goto done;
- break;
- case GIT_DIFF_LINE_ADDITION:
- if ((error = git_vector_insert(&postimage.lines, line)) < 0)
- goto done;
- break;
- }
- }
-
- if (hunk->hunk.new_start) {
- line_num = hunk->hunk.new_start -
- ctx->skipped_new_lines +
- ctx->skipped_old_lines -
- 1;
- } else {
- line_num = 0;
- }
-
- if (!find_hunk_linenum(&line_num, image, &preimage, line_num)) {
- error = apply_err("hunk at line %d did not apply",
- hunk->hunk.new_start);
- goto done;
- }
-
- error = update_hunk(image, line_num, &preimage, &postimage);
-
-done:
- patch_image_free(&preimage);
- patch_image_free(&postimage);
-
- return error;
-}
-
-static int apply_hunks(
- git_buf *out,
- const char *source,
- size_t source_len,
- git_patch *patch,
- apply_hunks_ctx *ctx)
-{
- git_patch_hunk *hunk;
- git_diff_line *line;
- patch_image image;
- size_t i;
- int error = 0;
-
- if ((error = patch_image_init_fromstr(&image, source, source_len)) < 0)
- goto done;
-
- git_array_foreach(patch->hunks, i, hunk) {
- if ((error = apply_hunk(&image, patch, hunk, ctx)) < 0)
- goto done;
- }
-
- git_vector_foreach(&image.lines, i, line)
- git_buf_put(out, line->content, line->content_len);
-
-done:
- patch_image_free(&image);
-
- return error;
-}
-
-static int apply_binary_delta(
- git_buf *out,
- const char *source,
- size_t source_len,
- git_diff_binary_file *binary_file)
-{
- git_buf inflated = GIT_BUF_INIT;
- int error = 0;
-
- /* no diff means identical contents */
- if (binary_file->datalen == 0)
- return git_buf_put(out, source, source_len);
-
- error = git_zstream_inflatebuf(&inflated,
- binary_file->data, binary_file->datalen);
-
- if (!error && inflated.size != binary_file->inflatedlen) {
- error = apply_err("inflated delta does not match expected length");
- git_buf_dispose(out);
- }
-
- if (error < 0)
- goto done;
-
- if (binary_file->type == GIT_DIFF_BINARY_DELTA) {
- void *data;
- size_t data_len;
-
- error = git_delta_apply(&data, &data_len, (void *)source, source_len,
- (void *)inflated.ptr, inflated.size);
-
- out->ptr = data;
- out->size = data_len;
- out->asize = data_len;
- }
- else if (binary_file->type == GIT_DIFF_BINARY_LITERAL) {
- git_buf_swap(out, &inflated);
- }
- else {
- error = apply_err("unknown binary delta type");
- goto done;
- }
-
-done:
- git_buf_dispose(&inflated);
- return error;
-}
-
-static int apply_binary(
- git_buf *out,
- const char *source,
- size_t source_len,
- git_patch *patch)
-{
- git_buf reverse = GIT_BUF_INIT;
- int error = 0;
-
- if (!patch->binary.contains_data) {
- error = apply_err("patch does not contain binary data");
- goto done;
- }
-
- if (!patch->binary.old_file.datalen && !patch->binary.new_file.datalen)
- goto done;
-
- /* first, apply the new_file delta to the given source */
- if ((error = apply_binary_delta(out, source, source_len,
- &patch->binary.new_file)) < 0)
- goto done;
-
- /* second, apply the old_file delta to sanity check the result */
- if ((error = apply_binary_delta(&reverse, out->ptr, out->size,
- &patch->binary.old_file)) < 0)
- goto done;
-
- /* Verify that the resulting file with the reverse patch applied matches the source file */
- if (source_len != reverse.size ||
- (source_len && memcmp(source, reverse.ptr, source_len) != 0)) {
- error = apply_err("binary patch did not apply cleanly");
- goto done;
- }
-
-done:
- if (error < 0)
- git_buf_dispose(out);
-
- git_buf_dispose(&reverse);
- return error;
-}
-
-int git_apply__patch(
- git_buf *contents_out,
- char **filename_out,
- unsigned int *mode_out,
- const char *source,
- size_t source_len,
- git_patch *patch,
- const git_apply_options *given_opts)
-{
- apply_hunks_ctx ctx = { GIT_APPLY_OPTIONS_INIT };
- char *filename = NULL;
- unsigned int mode = 0;
- int error = 0;
-
- GIT_ASSERT_ARG(contents_out);
- GIT_ASSERT_ARG(filename_out);
- GIT_ASSERT_ARG(mode_out);
- GIT_ASSERT_ARG(source || !source_len);
- GIT_ASSERT_ARG(patch);
-
- if (given_opts)
- memcpy(&ctx.opts, given_opts, sizeof(git_apply_options));
-
- *filename_out = NULL;
- *mode_out = 0;
-
- if (patch->delta->status != GIT_DELTA_DELETED) {
- const git_diff_file *newfile = &patch->delta->new_file;
-
- filename = git__strdup(newfile->path);
- mode = newfile->mode ?
- newfile->mode : GIT_FILEMODE_BLOB;
- }
-
- if (patch->delta->flags & GIT_DIFF_FLAG_BINARY)
- error = apply_binary(contents_out, source, source_len, patch);
- else if (patch->hunks.size)
- error = apply_hunks(contents_out, source, source_len, patch, &ctx);
- else
- error = git_buf_put(contents_out, source, source_len);
-
- if (error)
- goto done;
-
- if (patch->delta->status == GIT_DELTA_DELETED &&
- git_buf_len(contents_out) > 0) {
- error = apply_err("removal patch leaves file contents");
- goto done;
- }
-
- *filename_out = filename;
- *mode_out = mode;
-
-done:
- if (error < 0)
- git__free(filename);
-
- return error;
-}
-
-static int apply_one(
- git_repository *repo,
- git_reader *preimage_reader,
- git_index *preimage,
- git_reader *postimage_reader,
- git_index *postimage,
- git_diff *diff,
- git_strmap *removed_paths,
- size_t i,
- const git_apply_options *opts)
-{
- git_patch *patch = NULL;
- git_buf pre_contents = GIT_BUF_INIT, post_contents = GIT_BUF_INIT;
- const git_diff_delta *delta;
- char *filename = NULL;
- unsigned int mode;
- git_oid pre_id, post_id;
- git_filemode_t pre_filemode;
- git_index_entry pre_entry, post_entry;
- bool skip_preimage = false;
- int error;
-
- if ((error = git_patch_from_diff(&patch, diff, i)) < 0)
- goto done;
-
- delta = git_patch_get_delta(patch);
-
- if (opts->delta_cb) {
- error = opts->delta_cb(delta, opts->payload);
-
- if (error) {
- if (error > 0)
- error = 0;
-
- goto done;
- }
- }
-
- /*
- * Ensure that the file has not been deleted or renamed if we're
- * applying a modification delta.
- */
- if (delta->status != GIT_DELTA_RENAMED &&
- delta->status != GIT_DELTA_ADDED) {
- if (git_strmap_exists(removed_paths, delta->old_file.path)) {
- error = apply_err("path '%s' has been renamed or deleted", delta->old_file.path);
- goto done;
- }
- }
-
- /*
- * We may be applying a second delta to an already seen file. If so,
- * use the already modified data in the postimage instead of the
- * content from the index or working directory. (Don't do this in
- * the case of a rename, which must be specified before additional
- * deltas since we apply deltas to the target filename.)
- */
- if (delta->status != GIT_DELTA_RENAMED) {
- if ((error = git_reader_read(&pre_contents, &pre_id, &pre_filemode,
- postimage_reader, delta->old_file.path)) == 0) {
- skip_preimage = true;
- } else if (error == GIT_ENOTFOUND) {
- git_error_clear();
- error = 0;
- } else {
- goto done;
- }
- }
-
- if (!skip_preimage && delta->status != GIT_DELTA_ADDED) {
- error = git_reader_read(&pre_contents, &pre_id, &pre_filemode,
- preimage_reader, delta->old_file.path);
-
- /* ENOTFOUND means the preimage was not found; apply failed. */
- if (error == GIT_ENOTFOUND)
- error = GIT_EAPPLYFAIL;
-
- /* When applying to BOTH, the index did not match the workdir. */
- if (error == GIT_READER_MISMATCH)
- error = apply_err("%s: does not match index", delta->old_file.path);
-
- if (error < 0)
- goto done;
-
- /*
- * We need to populate the preimage data structure with the
- * contents that we are using as the preimage for this file.
- * This allows us to apply patches to files that have been
- * modified in the working directory. During checkout,
- * we will use this expected preimage as the baseline, and
- * limit checkout to only the paths affected by patch
- * application. (Without this, we would fail to write the
- * postimage contents to any file that had been modified
- * from HEAD on-disk, even if the patch application succeeded.)
- * Use the contents from the delta where available - some
- * fields may not be available, like the old file mode (eg in
- * an exact rename situation) so trust the patch parsing to
- * validate and use the preimage data in that case.
- */
- if (preimage) {
- memset(&pre_entry, 0, sizeof(git_index_entry));
- pre_entry.path = delta->old_file.path;
- pre_entry.mode = delta->old_file.mode ? delta->old_file.mode : pre_filemode;
- git_oid_cpy(&pre_entry.id, &pre_id);
-
- if ((error = git_index_add(preimage, &pre_entry)) < 0)
- goto done;
- }
- }
-
- if (delta->status != GIT_DELTA_DELETED) {
- if ((error = git_apply__patch(&post_contents, &filename, &mode,
- pre_contents.ptr, pre_contents.size, patch, opts)) < 0 ||
- (error = git_blob_create_from_buffer(&post_id, repo,
- post_contents.ptr, post_contents.size)) < 0)
- goto done;
-
- memset(&post_entry, 0, sizeof(git_index_entry));
- post_entry.path = filename;
- post_entry.mode = mode;
- git_oid_cpy(&post_entry.id, &post_id);
-
- if ((error = git_index_add(postimage, &post_entry)) < 0)
- goto done;
- }
-
- if (delta->status == GIT_DELTA_RENAMED ||
- delta->status == GIT_DELTA_DELETED)
- error = git_strmap_set(removed_paths, delta->old_file.path, (char *) delta->old_file.path);
-
- if (delta->status == GIT_DELTA_RENAMED ||
- delta->status == GIT_DELTA_ADDED)
- git_strmap_delete(removed_paths, delta->new_file.path);
-
-done:
- git_buf_dispose(&pre_contents);
- git_buf_dispose(&post_contents);
- git__free(filename);
- git_patch_free(patch);
-
- return error;
-}
-
-static int apply_deltas(
- git_repository *repo,
- git_reader *pre_reader,
- git_index *preimage,
- git_reader *post_reader,
- git_index *postimage,
- git_diff *diff,
- const git_apply_options *opts)
-{
- git_strmap *removed_paths;
- size_t i;
- int error = 0;
-
- if (git_strmap_new(&removed_paths) < 0)
- return -1;
-
- for (i = 0; i < git_diff_num_deltas(diff); i++) {
- if ((error = apply_one(repo, pre_reader, preimage, post_reader, postimage, diff, removed_paths, i, opts)) < 0)
- goto done;
- }
-
-done:
- git_strmap_free(removed_paths);
- return error;
-}
-
-int git_apply_to_tree(
- git_index **out,
- git_repository *repo,
- git_tree *preimage,
- git_diff *diff,
- const git_apply_options *given_opts)
-{
- git_index *postimage = NULL;
- git_reader *pre_reader = NULL, *post_reader = NULL;
- git_apply_options opts = GIT_APPLY_OPTIONS_INIT;
- const git_diff_delta *delta;
- size_t i;
- int error = 0;
-
- GIT_ASSERT_ARG(out);
- GIT_ASSERT_ARG(repo);
- GIT_ASSERT_ARG(preimage);
- GIT_ASSERT_ARG(diff);
-
- *out = NULL;
-
- if (given_opts)
- memcpy(&opts, given_opts, sizeof(git_apply_options));
-
- if ((error = git_reader_for_tree(&pre_reader, preimage)) < 0)
- goto done;
-
- /*
- * put the current tree into the postimage as-is - the diff will
- * replace any entries contained therein
- */
- if ((error = git_index_new(&postimage)) < 0 ||
- (error = git_index_read_tree(postimage, preimage)) < 0 ||
- (error = git_reader_for_index(&post_reader, repo, postimage)) < 0)
- goto done;
-
- /*
- * Remove the old paths from the index before applying diffs -
- * we need to do a full pass to remove them before adding deltas,
- * in order to handle rename situations.
- */
- for (i = 0; i < git_diff_num_deltas(diff); i++) {
- delta = git_diff_get_delta(diff, i);
-
- if (delta->status == GIT_DELTA_DELETED ||
- delta->status == GIT_DELTA_RENAMED) {
- if ((error = git_index_remove(postimage,
- delta->old_file.path, 0)) < 0)
- goto done;
- }
- }
-
- if ((error = apply_deltas(repo, pre_reader, NULL, post_reader, postimage, diff, &opts)) < 0)
- goto done;
-
- *out = postimage;
-
-done:
- if (error < 0)
- git_index_free(postimage);
-
- git_reader_free(pre_reader);
- git_reader_free(post_reader);
-
- return error;
-}
-
-static int git_apply__to_workdir(
- git_repository *repo,
- git_diff *diff,
- git_index *preimage,
- git_index *postimage,
- git_apply_location_t location,
- git_apply_options *opts)
-{
- git_vector paths = GIT_VECTOR_INIT;
- git_checkout_options checkout_opts = GIT_CHECKOUT_OPTIONS_INIT;
- const git_diff_delta *delta;
- size_t i;
- int error;
-
- GIT_UNUSED(opts);
-
- /*
- * Limit checkout to the paths affected by the diff; this ensures
- * that other modifications in the working directory are unaffected.
- */
- if ((error = git_vector_init(&paths, git_diff_num_deltas(diff), NULL)) < 0)
- goto done;
-
- for (i = 0; i < git_diff_num_deltas(diff); i++) {
- delta = git_diff_get_delta(diff, i);
-
- if ((error = git_vector_insert(&paths, (void *)delta->old_file.path)) < 0)
- goto done;
-
- if (strcmp(delta->old_file.path, delta->new_file.path) &&
- (error = git_vector_insert(&paths, (void *)delta->new_file.path)) < 0)
- goto done;
- }
-
- checkout_opts.checkout_strategy |= GIT_CHECKOUT_SAFE;
- checkout_opts.checkout_strategy |= GIT_CHECKOUT_DISABLE_PATHSPEC_MATCH;
- checkout_opts.checkout_strategy |= GIT_CHECKOUT_DONT_WRITE_INDEX;
-
- if (location == GIT_APPLY_LOCATION_WORKDIR)
- checkout_opts.checkout_strategy |= GIT_CHECKOUT_DONT_UPDATE_INDEX;
-
- checkout_opts.paths.strings = (char **)paths.contents;
- checkout_opts.paths.count = paths.length;
-
- checkout_opts.baseline_index = preimage;
-
- error = git_checkout_index(repo, postimage, &checkout_opts);
-
-done:
- git_vector_free(&paths);
- return error;
-}
-
-static int git_apply__to_index(
- git_repository *repo,
- git_diff *diff,
- git_index *preimage,
- git_index *postimage,
- git_apply_options *opts)
-{
- git_index *index = NULL;
- const git_diff_delta *delta;
- const git_index_entry *entry;
- size_t i;
- int error;
-
- GIT_UNUSED(preimage);
- GIT_UNUSED(opts);
-
- if ((error = git_repository_index(&index, repo)) < 0)
- goto done;
-
- /* Remove deleted (or renamed) paths from the index. */
- for (i = 0; i < git_diff_num_deltas(diff); i++) {
- delta = git_diff_get_delta(diff, i);
-
- if (delta->status == GIT_DELTA_DELETED ||
- delta->status == GIT_DELTA_RENAMED) {
- if ((error = git_index_remove(index, delta->old_file.path, 0)) < 0)
- goto done;
- }
- }
-
- /* Then add the changes back to the index. */
- for (i = 0; i < git_index_entrycount(postimage); i++) {
- entry = git_index_get_byindex(postimage, i);
-
- if ((error = git_index_add(index, entry)) < 0)
- goto done;
- }
-
-done:
- git_index_free(index);
- return error;
-}
-
-int git_apply_options_init(git_apply_options *opts, unsigned int version)
-{
- GIT_ASSERT_ARG(opts);
-
- GIT_INIT_STRUCTURE_FROM_TEMPLATE(
- opts, version, git_apply_options, GIT_APPLY_OPTIONS_INIT);
- return 0;
-}
-
-/*
- * Handle the three application options ("locations"):
- *
- * GIT_APPLY_LOCATION_WORKDIR: the default, emulates `git apply`.
- * Applies the diff only to the workdir items and ignores the index
- * entirely.
- *
- * GIT_APPLY_LOCATION_INDEX: emulates `git apply --cached`.
- * Applies the diff only to the index items and ignores the workdir
- * completely.
- *
- * GIT_APPLY_LOCATION_BOTH: emulates `git apply --index`.
- * Applies the diff to both the index items and the working directory
- * items.
- */
-
-int git_apply(
- git_repository *repo,
- git_diff *diff,
- git_apply_location_t location,
- const git_apply_options *given_opts)
-{
- git_indexwriter indexwriter = GIT_INDEXWRITER_INIT;
- git_index *index = NULL, *preimage = NULL, *postimage = NULL;
- git_reader *pre_reader = NULL, *post_reader = NULL;
- git_apply_options opts = GIT_APPLY_OPTIONS_INIT;
- int error = GIT_EINVALID;
-
- GIT_ASSERT_ARG(repo);
- GIT_ASSERT_ARG(diff);
-
- GIT_ERROR_CHECK_VERSION(
- given_opts, GIT_APPLY_OPTIONS_VERSION, "git_apply_options");
-
- if (given_opts)
- memcpy(&opts, given_opts, sizeof(git_apply_options));
-
- /*
- * by default, we apply a patch directly to the working directory;
- * in `--cached` or `--index` mode, we apply to the contents already
- * in the index.
- */
- switch (location) {
- case GIT_APPLY_LOCATION_BOTH:
- error = git_reader_for_workdir(&pre_reader, repo, true);
- break;
- case GIT_APPLY_LOCATION_INDEX:
- error = git_reader_for_index(&pre_reader, repo, NULL);
- break;
- case GIT_APPLY_LOCATION_WORKDIR:
- error = git_reader_for_workdir(&pre_reader, repo, false);
- break;
- default:
- GIT_ASSERT(false);
- }
-
- if (error < 0)
- goto done;
-
- /*
- * Build the preimage and postimage (differences). Note that
- * this is not the complete preimage or postimage, it only
- * contains the files affected by the patch. We want to avoid
- * having the full repo index, so we will limit our checkout
- * to only write these files that were affected by the diff.
- */
- if ((error = git_index_new(&preimage)) < 0 ||
- (error = git_index_new(&postimage)) < 0 ||
- (error = git_reader_for_index(&post_reader, repo, postimage)) < 0)
- goto done;
-
- if (!(opts.flags & GIT_APPLY_CHECK))
- if ((error = git_repository_index(&index, repo)) < 0 ||
- (error = git_indexwriter_init(&indexwriter, index)) < 0)
- goto done;
-
- if ((error = apply_deltas(repo, pre_reader, preimage, post_reader, postimage, diff, &opts)) < 0)
- goto done;
-
- if ((opts.flags & GIT_APPLY_CHECK))
- goto done;
-
- switch (location) {
- case GIT_APPLY_LOCATION_BOTH:
- error = git_apply__to_workdir(repo, diff, preimage, postimage, location, &opts);
- break;
- case GIT_APPLY_LOCATION_INDEX:
- error = git_apply__to_index(repo, diff, preimage, postimage, &opts);
- break;
- case GIT_APPLY_LOCATION_WORKDIR:
- error = git_apply__to_workdir(repo, diff, preimage, postimage, location, &opts);
- break;
- default:
- GIT_ASSERT(false);
- }
-
- if (error < 0)
- goto done;
-
- error = git_indexwriter_commit(&indexwriter);
-
-done:
- git_indexwriter_cleanup(&indexwriter);
- git_index_free(postimage);
- git_index_free(preimage);
- git_index_free(index);
- git_reader_free(pre_reader);
- git_reader_free(post_reader);
-
- return error;
-}