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/*
* Copyright (C) 2009-2012 the libgit2 contributors
*
* 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 "git2/reset.h"
#define ERROR_MSG "Cannot perform reset"
static int reset_error_invalid(const char *msg)
{
giterr_set(GITERR_INVALID, "%s - %s", ERROR_MSG, msg);
return -1;
}
int git_reset(
git_repository *repo,
const git_object *target,
git_reset_type reset_type)
{
git_otype target_type = GIT_OBJ_BAD;
git_object *commit = NULL;
git_index *index = NULL;
git_tree *tree = NULL;
int error = -1;
assert(repo && target);
assert(reset_type == GIT_RESET_SOFT || reset_type == GIT_RESET_MIXED);
if (git_object_owner(target) != repo)
return reset_error_invalid("The given target does not belong to this repository.");
if (reset_type == GIT_RESET_MIXED && git_repository_is_bare(repo))
return reset_error_invalid("Mixed reset is not allowed in a bare repository.");
target_type = git_object_type(target);
switch (target_type)
{
case GIT_OBJ_TAG:
if (git_tag_peel(&commit, (git_tag *)target) < 0)
goto cleanup;
if (git_object_type(commit) != GIT_OBJ_COMMIT) {
reset_error_invalid("The given target does not resolve to a commit.");
goto cleanup;
}
break;
case GIT_OBJ_COMMIT:
commit = (git_object *)target;
break;
default:
return reset_error_invalid("Only git_tag and git_commit objects are valid targets.");
}
//TODO: Check for unmerged entries
if (git_reference__update(repo, git_object_id(commit), GIT_HEAD_FILE) < 0)
goto cleanup;
if (reset_type == GIT_RESET_SOFT) {
error = 0;
goto cleanup;
}
if (git_commit_tree(&tree, (git_commit *)commit) < 0) {
giterr_set(GITERR_OBJECT, "%s - Failed to retrieve the commit tree.", ERROR_MSG);
goto cleanup;
}
if (git_repository_index(&index, repo) < 0) {
giterr_set(GITERR_OBJECT, "%s - Failed to retrieve the index.", ERROR_MSG);
goto cleanup;
}
if (git_index_read_tree(index, tree, NULL) < 0) {
giterr_set(GITERR_INDEX, "%s - Failed to update the index.", ERROR_MSG);
goto cleanup;
}
if (git_index_write(index) < 0) {
giterr_set(GITERR_INDEX, "%s - Failed to write the index.", ERROR_MSG);
goto cleanup;
}
error = 0;
cleanup:
if (target_type == GIT_OBJ_TAG)
git_object_free(commit);
git_index_free(index);
git_tree_free(tree);
return error;
}
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