| /* |
| * 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) < 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; |
| } |