/*
* 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 "repository.h"
#include "revwalk.h"
#include "buffer.h"
#include "merge.h"
#include "refs.h"
#include "git2/repository.h"
#include "git2/merge.h"
#include "git2/reset.h"
#include "commit_list.h"
int git_repository_merge_cleanup(git_repository *repo)
{
int error = 0;
git_buf merge_head_path = GIT_BUF_INIT,
merge_mode_path = GIT_BUF_INIT,
merge_msg_path = GIT_BUF_INIT;
assert(repo);
if (git_buf_joinpath(&merge_head_path, repo->path_repository, GIT_MERGE_HEAD_FILE) < 0 ||
git_buf_joinpath(&merge_mode_path, repo->path_repository, GIT_MERGE_MODE_FILE) < 0 ||
git_buf_joinpath(&merge_msg_path, repo->path_repository, GIT_MERGE_MSG_FILE) < 0)
return -1;
if (git_path_isfile(merge_head_path.ptr)) {
if ((error = p_unlink(merge_head_path.ptr)) < 0)
goto cleanup;
}
if (git_path_isfile(merge_mode_path.ptr))
(void)p_unlink(merge_mode_path.ptr);
if (git_path_isfile(merge_msg_path.ptr))
(void)p_unlink(merge_msg_path.ptr);
cleanup:
git_buf_free(&merge_msg_path);
git_buf_free(&merge_mode_path);
git_buf_free(&merge_head_path);
return error;
}
int git_merge_base_many(git_oid *out, git_repository *repo, const git_oid input_array[], size_t length)
{
git_revwalk *walk;
git_vector list;
git_commit_list *result = NULL;
int error = -1;
unsigned int i;
git_commit_list_node *commit;
assert(out && repo && input_array);
if (length < 2) {
giterr_set(GITERR_INVALID, "At least two commits are required to find an ancestor. Provided 'length' was %u.", length);
return -1;
}
if (git_vector_init(&list, length - 1, NULL) < 0)
return -1;
if (git_revwalk_new(&walk, repo) < 0)
goto cleanup;
for (i = 1; i < length; i++) {
commit = git_revwalk__commit_lookup(walk, &input_array[i]);
if (commit == NULL)
goto cleanup;
git_vector_insert(&list, commit);
}
commit = git_revwalk__commit_lookup(walk, &input_array[0]);
if (commit == NULL)
goto cleanup;
if (git_merge__bases_many(&result, walk, commit, &list) < 0)
goto cleanup;
if (!result) {
error = GIT_ENOTFOUND;
goto cleanup;
}
git_oid_cpy(out, &result->item->oid);
error = 0;
cleanup:
git_commit_list_free(&result);
git_revwalk_free(walk);
git_vector_free(&list);
return error;
}
int git_merge_base(git_oid *out, git_repository *repo, const git_oid *one, const git_oid *two)
{
git_revwalk *walk;
git_vector list;
git_commit_list *result = NULL;
git_commit_list_node *commit;
void *contents[1];
if (git_revwalk_new(&walk, repo) < 0)
return -1;
commit = git_revwalk__commit_lookup(walk, two);
if (commit == NULL)
goto on_error;
/* This is just one value, so we can do it on the stack */
memset(&list, 0x0, sizeof(git_vector));
contents[0] = commit;
list.length = 1;
list.contents = contents;
commit = git_revwalk__commit_lookup(walk, one);
if (commit == NULL)
goto on_error;
if (git_merge__bases_many(&result, walk, commit, &list) < 0)
goto on_error;
if (!result) {
git_revwalk_free(walk);
giterr_clear();
return GIT_ENOTFOUND;
}
git_oid_cpy(out, &result->item->oid);
git_commit_list_free(&result);
git_revwalk_free(walk);
return 0;
on_error:
git_revwalk_free(walk);
return -1;
}
static int interesting(git_pqueue *list)
{
unsigned int i;
/* element 0 isn't used - we need to start at 1 */
for (i = 1; i < list->size; i++) {
git_commit_list_node *commit = list->d[i];
if ((commit->flags & STALE) == 0)
return 1;
}
return 0;
}
int git_merge__bases_many(git_commit_list **out, git_revwalk *walk, git_commit_list_node *one, git_vector *twos)
{
int error;
unsigned int i;
git_commit_list_node *two;
git_commit_list *result = NULL, *tmp = NULL;
git_pqueue list;
/* if the commit is repeated, we have a our merge base already */
git_vector_foreach(twos, i, two) {
if (one == two)
return git_commit_list_insert(one, out) ? 0 : -1;
}
if (git_pqueue_init(&list, twos->length * 2, git_commit_list_time_cmp) < 0)
return -1;
if (git_commit_list_parse(walk, one) < 0)
return -1;
one->flags |= PARENT1;
if (git_pqueue_insert(&list, one) < 0)
return -1;
git_vector_foreach(twos, i, two) {
git_commit_list_parse(walk, two);
two->flags |= PARENT2;
if (git_pqueue_insert(&list, two) < 0)
return -1;
}
/* as long as there are non-STALE commits */
while (interesting(&list)) {
git_commit_list_node *commit;
int flags;
commit = git_pqueue_pop(&list);
flags = commit->flags & (PARENT1 | PARENT2 | STALE);
if (flags == (PARENT1 | PARENT2)) {
if (!(commit->flags & RESULT)) {
commit->flags |= RESULT;
if (git_commit_list_insert(commit, &result) == NULL)
return -1;
}
/* we mark the parents of a merge stale */
flags |= STALE;
}
for (i = 0; i < commit->out_degree; i++) {
git_commit_list_node *p = commit->parents[i];
if ((p->flags & flags) == flags)
continue;
if ((error = git_commit_list_parse(walk, p)) < 0)
return error;
p->flags |= flags;
if (git_pqueue_insert(&list, p) < 0)
return -1;
}
}
git_pqueue_free(&list);
/* filter out any stale commits in the results */
tmp = result;
result = NULL;
while (tmp) {
struct git_commit_list *next = tmp->next;
if (!(tmp->item->flags & STALE))
if (git_commit_list_insert_by_date(tmp->item, &result) == NULL)
return -1;
git__free(tmp);
tmp = next;
}
*out = result;
return 0;
}
int git_repository_mergehead_foreach(git_repository *repo,
git_repository_mergehead_foreach_cb cb,
void *payload)
{
git_buf merge_head_path = GIT_BUF_INIT, merge_head_file = GIT_BUF_INIT;
char *buffer, *line;
size_t line_num = 1;
git_oid oid;
int error = 0;
assert(repo && cb);
if ((error = git_buf_joinpath(&merge_head_path, repo->path_repository,
GIT_MERGE_HEAD_FILE)) < 0)
return error;
if ((error = git_futils_readbuffer(&merge_head_file,
git_buf_cstr(&merge_head_path))) < 0)
goto cleanup;
buffer = merge_head_file.ptr;
while ((line = git__strsep(&buffer, "\n")) != NULL) {
if (strlen(line) != GIT_OID_HEXSZ) {
giterr_set(GITERR_INVALID, "Unable to parse OID - invalid length");
error = -1;
goto cleanup;
}
if ((error = git_oid_fromstr(&oid, line)) < 0)
goto cleanup;
if (cb(&oid, payload) < 0) {
error = GIT_EUSER;
goto cleanup;
}
++line_num;
}
if (*buffer) {
giterr_set(GITERR_MERGE, "No EOL at line %d", line_num);
error = -1;
goto cleanup;
}
cleanup:
git_buf_free(&merge_head_path);
git_buf_free(&merge_head_file);
return error;
}
