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/*
* 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 "common.h"
#include "commit.h"
#include "tag.h"
#include "merge.h"
#include "diff.h"
#include "git2/reset.h"
#include "git2/checkout.h"
#include "git2/merge.h"
#include "git2/refs.h"
#define ERROR_MSG "Cannot perform reset"
int git_reset_default(
git_repository *repo,
git_object *target,
git_strarray* pathspecs)
{
git_object *commit = NULL;
git_tree *tree = NULL;
git_diff *diff = NULL;
git_diff_options opts = GIT_DIFF_OPTIONS_INIT;
size_t i;
git_diff_delta *delta;
git_index_entry entry;
int error;
git_index *index = NULL;
assert(pathspecs != NULL && pathspecs->count > 0);
memset(&entry, 0, sizeof(git_index_entry));
if ((error = git_repository_index(&index, repo)) < 0)
goto cleanup;
if (target) {
if (git_object_owner(target) != repo) {
giterr_set(GITERR_OBJECT,
"%s_default - The given target does not belong to this repository.", ERROR_MSG);
return -1;
}
if ((error = git_object_peel(&commit, target, GIT_OBJ_COMMIT)) < 0 ||
(error = git_commit_tree(&tree, (git_commit *)commit)) < 0)
goto cleanup;
}
opts.pathspec = *pathspecs;
opts.flags = GIT_DIFF_REVERSE;
if ((error = git_diff_tree_to_index(
&diff, repo, tree, index, &opts)) < 0)
goto cleanup;
git_vector_foreach(&diff->deltas, i, delta) {
if ((error = git_index_conflict_remove(index, delta->old_file.path)) < 0)
goto cleanup;
assert(delta->status == GIT_DELTA_ADDED ||
delta->status == GIT_DELTA_MODIFIED ||
delta->status == GIT_DELTA_DELETED);
if (delta->status == GIT_DELTA_DELETED) {
if ((error = git_index_remove(index, delta->old_file.path, 0)) < 0)
goto cleanup;
} else {
entry.mode = delta->new_file.mode;
git_oid_cpy(&entry.oid, &delta->new_file.oid);
entry.path = (char *)delta->new_file.path;
if ((error = git_index_add(index, &entry)) < 0)
goto cleanup;
}
}
error = git_index_write(index);
cleanup:
git_object_free(commit);
git_tree_free(tree);
git_index_free(index);
git_diff_free(diff);
return error;
}
int git_reset(
git_repository *repo,
git_object *target,
git_reset_t reset_type)
{
git_object *commit = NULL;
git_index *index = NULL;
git_tree *tree = NULL;
int error = 0;
git_checkout_opts opts = GIT_CHECKOUT_OPTS_INIT;
assert(repo && target);
if (git_object_owner(target) != repo) {
giterr_set(GITERR_OBJECT,
"%s - The given target does not belong to this repository.", ERROR_MSG);
return -1;
}
if (reset_type != GIT_RESET_SOFT &&
(error = git_repository__ensure_not_bare(repo,
reset_type == GIT_RESET_MIXED ? "reset mixed" : "reset hard")) < 0)
return error;
if ((error = git_object_peel(&commit, target, GIT_OBJ_COMMIT)) < 0 ||
(error = git_repository_index(&index, repo)) < 0 ||
(error = git_commit_tree(&tree, (git_commit *)commit)) < 0)
goto cleanup;
if (reset_type == GIT_RESET_SOFT &&
(git_repository_state(repo) == GIT_REPOSITORY_STATE_MERGE ||
git_index_has_conflicts(index)))
{
giterr_set(GITERR_OBJECT, "%s (soft) in the middle of a merge.", ERROR_MSG);
error = GIT_EUNMERGED;
goto cleanup;
}
/* move HEAD to the new target */
if ((error = git_reference__update_terminal(repo, GIT_HEAD_FILE,
git_object_id(commit))) < 0)
goto cleanup;
if (reset_type == GIT_RESET_HARD) {
/* overwrite working directory with HEAD */
opts.checkout_strategy = GIT_CHECKOUT_FORCE;
if ((error = git_checkout_tree(repo, (git_object *)tree, &opts)) < 0)
goto cleanup;
}
if (reset_type > GIT_RESET_SOFT) {
/* reset index to the target content */
if ((error = git_index_read_tree(index, tree)) < 0 ||
(error = git_index_write(index)) < 0)
goto cleanup;
if ((error = git_repository_merge_cleanup(repo)) < 0) {
giterr_set(GITERR_INDEX, "%s - failed to clean up merge data", ERROR_MSG);
goto cleanup;
}
}
cleanup:
git_object_free(commit);
git_index_free(index);
git_tree_free(tree);
return error;
}
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