static int filter_ref__cb(git_remote_head *head, void *payload)
{
struct filter_payload *p = payload;
int match = 0;
if (!git_reference_is_valid_name(head->name))
return 0;
if (!p->found_head && strcmp(head->name, GIT_HEAD_FILE) == 0)
p->found_head = 1;
else if (p->remote->download_tags == GIT_REMOTE_DOWNLOAD_TAGS_ALL) {
/*
* If tagopt is --tags, then we only use the default
* tags refspec and ignore the remote's
*/
if (git_refspec_src_matches(p->tagspec, head->name))
match = 1;
else
return 0;
} else if (git_remote__matching_refspec(p->remote, head->name))
match = 1;
if (!match)
return 0;
/* If we have the object, mark it so we don't ask for it */
if (git_odb_exists(p->odb, &head->oid))
head->local = 1;
else
p->remote->need_pack = 1;
return git_vector_insert(&p->remote->refs, head);
}
static int maybe_want(git_remote *remote, git_remote_head *head, git_odb *odb, git_refspec *tagspec)
{
int match = 0;
if (!git_reference_is_valid_name(head->name))
return 0;
if (remote->download_tags == GIT_REMOTE_DOWNLOAD_TAGS_ALL) {
/*
* If tagopt is --tags, always request tags
* in addition to the remote's refspecs
*/
if (git_refspec_src_matches(tagspec, head->name))
match = 1;
}
if (!match && git_remote__matching_refspec(remote, head->name))
match = 1;
if (!match)
return 0;
/* If we have the object, mark it so we don't ask for it */
if (git_odb_exists(odb, &head->oid)) {
head->local = 1;
}
else
remote->need_pack = 1;
return git_vector_insert(&remote->refs, head);
}
int git_branch_upstream__name(
git_buf *tracking_name,
git_repository *repo,
const char *canonical_branch_name)
{
const char *remote_name, *merge_name;
git_buf buf = GIT_BUF_INIT;
int error = -1;
git_remote *remote = NULL;
const git_refspec *refspec;
assert(tracking_name && canonical_branch_name);
if (!git_reference__is_branch(canonical_branch_name))
return not_a_local_branch(canonical_branch_name);
if ((error = retrieve_upstream_configuration(
&remote_name, repo, canonical_branch_name, "branch.%s.remote")) < 0)
goto cleanup;
if ((error = retrieve_upstream_configuration(
&merge_name, repo, canonical_branch_name, "branch.%s.merge")) < 0)
goto cleanup;
if (!*remote_name || !*merge_name) {
giterr_set(GITERR_REFERENCE,
"branch '%s' does not have an upstream", canonical_branch_name);
error = GIT_ENOTFOUND;
goto cleanup;
}
if (strcmp(".", remote_name) != 0) {
if ((error = git_remote_load(&remote, repo, remote_name)) < 0)
goto cleanup;
refspec = git_remote__matching_refspec(remote, merge_name);
if (!refspec) {
error = GIT_ENOTFOUND;
goto cleanup;
}
if (git_refspec_transform_r(&buf, refspec, merge_name) < 0)
goto cleanup;
} else
if (git_buf_sets(&buf, merge_name) < 0)
goto cleanup;
error = git_buf_set(tracking_name, git_buf_cstr(&buf), git_buf_len(&buf));
cleanup:
git_remote_free(remote);
git_buf_free(&buf);
return error;
}
int git_branch_upstream_name(
git_buf *out,
git_repository *repo,
const char *refname)
{
git_buf remote_name = GIT_BUF_INIT;
git_buf merge_name = GIT_BUF_INIT;
git_buf buf = GIT_BUF_INIT;
int error = -1;
git_remote *remote = NULL;
const git_refspec *refspec;
git_config *config;
assert(out && refname);
git_buf_sanitize(out);
if (!git_reference__is_branch(refname))
return not_a_local_branch(refname);
if ((error = git_repository_config_snapshot(&config, repo)) < 0)
return error;
if ((error = retrieve_upstream_configuration(
&remote_name, config, refname, "branch.%s.remote")) < 0)
goto cleanup;
if ((error = retrieve_upstream_configuration(
&merge_name, config, refname, "branch.%s.merge")) < 0)
goto cleanup;
if (git_buf_len(&remote_name) == 0 || git_buf_len(&merge_name) == 0) {
giterr_set(GITERR_REFERENCE,
"branch '%s' does not have an upstream", refname);
error = GIT_ENOTFOUND;
goto cleanup;
}
if (strcmp(".", git_buf_cstr(&remote_name)) != 0) {
if ((error = git_remote_lookup(&remote, repo, git_buf_cstr(&remote_name))) < 0)
goto cleanup;
refspec = git_remote__matching_refspec(remote, git_buf_cstr(&merge_name));
if (!refspec) {
error = GIT_ENOTFOUND;
goto cleanup;
}
if (git_refspec_transform(&buf, refspec, git_buf_cstr(&merge_name)) < 0)
goto cleanup;
} else
if (git_buf_set(&buf, git_buf_cstr(&merge_name), git_buf_len(&merge_name)) < 0)
goto cleanup;
error = git_buf_set(out, git_buf_cstr(&buf), git_buf_len(&buf));
cleanup:
git_config_free(config);
git_remote_free(remote);
git_buf_free(&remote_name);
git_buf_free(&merge_name);
git_buf_free(&buf);
return error;
}
static int update_head_to_remote(git_repository *repo, git_remote *remote)
{
int retcode = -1;
git_refspec dummy_spec;
git_remote_head *remote_head;
struct head_info head_info;
git_buf remote_master_name = GIT_BUF_INIT;
/* Did we just clone an empty repository? */
if (remote->refs.length == 0) {
return setup_tracking_config(
repo,
"master",
GIT_REMOTE_ORIGIN,
GIT_REFS_HEADS_MASTER_FILE);
}
/* Get the remote's HEAD. This is always the first ref in remote->refs. */
remote_head = NULL;
if (!remote->transport->ls(remote->transport, get_head_callback, &remote_head))
return -1;
assert(remote_head);
git_oid_cpy(&head_info.remote_head_oid, &remote_head->oid);
git_buf_init(&head_info.branchname, 16);
head_info.repo = repo;
head_info.refspec = git_remote__matching_refspec(remote, GIT_REFS_HEADS_MASTER_FILE);
head_info.found = 0;
if (head_info.refspec == NULL) {
memset(&dummy_spec, 0, sizeof(git_refspec));
head_info.refspec = &dummy_spec;
}
/* Determine the remote tracking reference name from the local master */
if (git_refspec_transform_r(
&remote_master_name,
head_info.refspec,
GIT_REFS_HEADS_MASTER_FILE) < 0)
return -1;
/* Check to see if the remote HEAD points to the remote master */
if (reference_matches_remote_head(git_buf_cstr(&remote_master_name), &head_info) < 0)
goto cleanup;
if (head_info.found) {
retcode = update_head_to_new_branch(
repo,
&head_info.remote_head_oid,
git_buf_cstr(&head_info.branchname));
goto cleanup;
}
/* Not master. Check all the other refs. */
if (git_reference_foreach_name(
repo,
reference_matches_remote_head,
&head_info) < 0)
goto cleanup;
if (head_info.found) {
retcode = update_head_to_new_branch(
repo,
&head_info.remote_head_oid,
git_buf_cstr(&head_info.branchname));
goto cleanup;
} else {
retcode = git_repository_set_head_detached(
repo,
&head_info.remote_head_oid);
goto cleanup;
}
cleanup:
git_buf_free(&remote_master_name);
git_buf_free(&head_info.branchname);
return retcode;
}
static int update_head_to_remote(
git_repository *repo,
git_remote *remote,
const git_signature *signature,
const char *reflog_message)
{
int error = 0, found_branch = 0;
size_t refs_len;
git_refspec dummy_spec, *refspec;
const git_remote_head *remote_head, **refs;
const git_oid *remote_head_id;
git_buf remote_master_name = GIT_BUF_INIT;
git_buf branch = GIT_BUF_INIT;
if ((error = git_remote_ls(&refs, &refs_len, remote)) < 0)
return error;
/* Did we just clone an empty repository? */
if (refs_len == 0)
return setup_tracking_config(
repo, "master", GIT_REMOTE_ORIGIN, GIT_REFS_HEADS_MASTER_FILE);
error = git_remote_default_branch(&branch, remote);
if (error == GIT_ENOTFOUND) {
git_buf_puts(&branch, GIT_REFS_HEADS_MASTER_FILE);
} else {
found_branch = 1;
}
/* Get the remote's HEAD. This is always the first ref in the list. */
remote_head = refs[0];
assert(remote_head);
remote_head_id = &remote_head->oid;
refspec = git_remote__matching_refspec(remote, git_buf_cstr(&branch));
if (refspec == NULL) {
memset(&dummy_spec, 0, sizeof(git_refspec));
refspec = &dummy_spec;
}
/* Determine the remote tracking reference name from the local master */
if ((error = git_refspec_transform(
&remote_master_name,
refspec,
git_buf_cstr(&branch))) < 0)
return error;
if (found_branch) {
error = update_head_to_new_branch(
repo,
remote_head_id,
git_buf_cstr(&branch),
signature, reflog_message);
} else {
error = git_repository_set_head_detached(
repo, remote_head_id, signature, reflog_message);
}
git_buf_free(&remote_master_name);
git_buf_free(&branch);
return error;
}
static int update_head_to_remote(
git_repository *repo,
git_remote *remote,
const char *reflog_message)
{
int error = 0;
size_t refs_len;
git_refspec *refspec;
const git_remote_head *remote_head, **refs;
const git_oid *remote_head_id;
git_buf remote_master_name = GIT_BUF_INIT;
git_buf branch = GIT_BUF_INIT;
if ((error = git_remote_ls(&refs, &refs_len, remote)) < 0)
return error;
/* We cloned an empty repository or one with an unborn HEAD */
if (refs_len == 0 || strcmp(refs[0]->name, GIT_HEAD_FILE))
return setup_tracking_config(
repo, "master", GIT_REMOTE_ORIGIN, GIT_REFS_HEADS_MASTER_FILE);
/* We know we have HEAD, let's see where it points */
remote_head = refs[0];
assert(remote_head);
remote_head_id = &remote_head->oid;
error = git_remote_default_branch(&branch, remote);
if (error == GIT_ENOTFOUND) {
error = git_repository_set_head_detached(
repo, remote_head_id);
goto cleanup;
}
refspec = git_remote__matching_refspec(remote, git_buf_cstr(&branch));
if (refspec == NULL) {
git_error_set(GIT_ERROR_NET, "the remote's default branch does not fit the refspec configuration");
error = GIT_EINVALIDSPEC;
goto cleanup;
}
/* Determine the remote tracking reference name from the local master */
if ((error = git_refspec_transform(
&remote_master_name,
refspec,
git_buf_cstr(&branch))) < 0)
goto cleanup;
error = update_head_to_new_branch(
repo,
remote_head_id,
git_buf_cstr(&branch),
reflog_message);
cleanup:
git_buf_dispose(&remote_master_name);
git_buf_dispose(&branch);
return error;
}