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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 "branch.h"
#include "tag.h"
static int retrieve_branch_reference(
git_reference **branch_reference_out,
git_repository *repo,
const char *branch_name,
int is_remote)
{
git_reference *branch;
int error = -1;
char *prefix;
git_buf ref_name = GIT_BUF_INIT;
*branch_reference_out = NULL;
prefix = is_remote ? GIT_REFS_REMOTES_DIR : GIT_REFS_HEADS_DIR;
if (git_buf_joinpath(&ref_name, prefix, branch_name) < 0)
goto cleanup;
if ((error = git_reference_lookup(&branch, repo, ref_name.ptr)) < 0) {
giterr_set(GITERR_REFERENCE,
"Cannot locate %s branch '%s'.", is_remote ? "remote-tracking" : "local", branch_name);
goto cleanup;
}
*branch_reference_out = branch;
cleanup:
git_buf_free(&ref_name);
return error;
}
static int create_error_invalid(const char *msg)
{
giterr_set(GITERR_INVALID, "Cannot create branch - %s", msg);
return -1;
}
int git_branch_create(
git_oid *oid_out,
git_repository *repo,
const char *branch_name,
const git_object *target,
int force)
{
git_otype target_type = GIT_OBJ_BAD;
git_object *commit = NULL;
git_reference *branch = NULL;
git_buf canonical_branch_name = GIT_BUF_INIT;
int error = -1;
assert(repo && branch_name && target && oid_out);
if (git_object_owner(target) != repo)
return create_error_invalid("The given target does not belong to this 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) {
create_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 create_error_invalid("Only git_tag and git_commit objects are valid targets.");
}
if (git_buf_joinpath(&canonical_branch_name, GIT_REFS_HEADS_DIR, branch_name) < 0)
goto cleanup;
if (git_reference_create_oid(&branch, repo, git_buf_cstr(&canonical_branch_name), git_object_id(commit), force) < 0)
goto cleanup;
git_oid_cpy(oid_out, git_reference_oid(branch));
error = 0;
cleanup:
if (target_type == GIT_OBJ_TAG)
git_object_free(commit);
git_reference_free(branch);
git_buf_free(&canonical_branch_name);
return error;
}
int git_branch_delete(git_repository *repo, const char *branch_name, git_branch_t branch_type)
{
git_reference *branch = NULL;
git_reference *head = NULL;
int error;
assert((branch_type == GIT_BRANCH_LOCAL) || (branch_type == GIT_BRANCH_REMOTE));
if ((error = retrieve_branch_reference(&branch, repo, branch_name, branch_type == GIT_BRANCH_REMOTE)) < 0)
return error;
if (git_reference_lookup(&head, repo, GIT_HEAD_FILE) < 0) {
giterr_set(GITERR_REFERENCE, "Cannot locate HEAD.");
goto on_error;
}
if ((git_reference_type(head) == GIT_REF_SYMBOLIC)
&& (strcmp(git_reference_target(head), git_reference_name(branch)) == 0)) {
giterr_set(GITERR_REFERENCE,
"Cannot delete branch '%s' as it is the current HEAD of the repository.", branch_name);
goto on_error;
}
if (git_reference_delete(branch) < 0)
goto on_error;
git_reference_free(head);
return 0;
on_error:
git_reference_free(head);
git_reference_free(branch);
return -1;
}
typedef struct {
git_vector *branchlist;
unsigned int branch_type;
} branch_filter_data;
static int branch_list_cb(const char *branch_name, void *payload)
{
branch_filter_data *filter = (branch_filter_data *)payload;
if ((filter->branch_type & GIT_BRANCH_LOCAL && git__prefixcmp(branch_name, GIT_REFS_HEADS_DIR) == 0)
|| (filter->branch_type & GIT_BRANCH_REMOTE && git__prefixcmp(branch_name, GIT_REFS_REMOTES_DIR) == 0))
return git_vector_insert(filter->branchlist, git__strdup(branch_name));
return 0;
}
int git_branch_list(git_strarray *branch_names, git_repository *repo, unsigned int list_flags)
{
int error;
branch_filter_data filter;
git_vector branchlist;
assert(branch_names && repo);
if (git_vector_init(&branchlist, 8, NULL) < 0)
return -1;
filter.branchlist = &branchlist;
filter.branch_type = list_flags;
error = git_reference_foreach(repo, GIT_REF_LISTALL, &branch_list_cb, (void *)&filter);
if (error < 0) {
git_vector_free(&branchlist);
return -1;
}
branch_names->strings = (char **)branchlist.contents;
branch_names->count = branchlist.length;
return 0;
}
int git_branch_move(git_repository *repo, const char *old_branch_name, const char *new_branch_name, int force)
{
git_reference *reference = NULL;
git_buf old_reference_name = GIT_BUF_INIT, new_reference_name = GIT_BUF_INIT;
int error = 0;
if ((error = git_buf_joinpath(&old_reference_name, GIT_REFS_HEADS_DIR, old_branch_name)) < 0)
goto cleanup;
/* We need to be able to return GIT_ENOTFOUND */
if ((error = git_reference_lookup(&reference, repo, git_buf_cstr(&old_reference_name))) < 0)
goto cleanup;
if ((error = git_buf_joinpath(&new_reference_name, GIT_REFS_HEADS_DIR, new_branch_name)) < 0)
goto cleanup;
error = git_reference_rename(reference, git_buf_cstr(&new_reference_name), force);
cleanup:
git_reference_free(reference);
git_buf_free(&old_reference_name);
git_buf_free(&new_reference_name);
return error;
}
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