diff options
Diffstat (limited to 'src/libgit2/apply.c')
| -rw-r--r-- | src/libgit2/apply.c | 898 |
1 files changed, 898 insertions, 0 deletions
diff --git a/src/libgit2/apply.c b/src/libgit2/apply.c new file mode 100644 index 000000000..18304da4d --- /dev/null +++ b/src/libgit2/apply.c @@ -0,0 +1,898 @@ +/* + * 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_str *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_str_put(out, line->content, line->content_len); + +done: + patch_image_free(&image); + + return error; +} + +static int apply_binary_delta( + git_str *out, + const char *source, + size_t source_len, + git_diff_binary_file *binary_file) +{ + git_str inflated = GIT_STR_INIT; + int error = 0; + + /* no diff means identical contents */ + if (binary_file->datalen == 0) + return git_str_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_str_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_str_swap(out, &inflated); + } + else { + error = apply_err("unknown binary delta type"); + goto done; + } + +done: + git_str_dispose(&inflated); + return error; +} + +static int apply_binary( + git_str *out, + const char *source, + size_t source_len, + git_patch *patch) +{ + git_str reverse = GIT_STR_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_str_dispose(out); + + git_str_dispose(&reverse); + return error; +} + +int git_apply__patch( + git_str *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_str_put(contents_out, source, source_len); + + if (error) + goto done; + + if (patch->delta->status == GIT_DELTA_DELETED && + git_str_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_str pre_contents = GIT_STR_INIT, post_contents = GIT_STR_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_str_dispose(&pre_contents); + git_str_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; +} |