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_remote(git_buf *buf, git_repository *repo, const char *refname)
{
int error;
git_config *cfg;
if (!git_reference__is_branch(refname))
return not_a_local_branch(refname);
if ((error = git_repository_config__weakptr(&cfg, repo)) < 0)
return error;
git_buf_sanitize(buf);
if ((error = retrieve_upstream_configuration(buf, cfg, refname, "branch.%s.remote")) < 0)
return error;
if (git_buf_len(buf) == 0) {
giterr_set(GITERR_REFERENCE, "branch '%s' does not have an upstream remote", refname);
error = GIT_ENOTFOUND;
git_buf_clear(buf);
}
return error;
}
int git_branch_set_upstream(git_reference *branch, const char *upstream_name)
{
git_buf key = GIT_BUF_INIT, value = GIT_BUF_INIT;
git_reference *upstream;
git_repository *repo;
git_remote *remote = NULL;
git_config *config;
const char *name, *shortname;
int local, error;
const git_refspec *fetchspec;
name = git_reference_name(branch);
if (!git_reference__is_branch(name))
return not_a_local_branch(name);
if (git_repository_config__weakptr(&config, git_reference_owner(branch)) < 0)
return -1;
shortname = name + strlen(GIT_REFS_HEADS_DIR);
if (upstream_name == NULL)
return unset_upstream(config, shortname);
repo = git_reference_owner(branch);
/* First we need to figure out whether it's a branch or remote-tracking */
if (git_branch_lookup(&upstream, repo, upstream_name, GIT_BRANCH_LOCAL) == 0)
local = 1;
else if (git_branch_lookup(&upstream, repo, upstream_name, GIT_BRANCH_REMOTE) == 0)
local = 0;
else {
giterr_set(GITERR_REFERENCE,
"Cannot set upstream for branch '%s'", shortname);
return GIT_ENOTFOUND;
}
/*
* If it's local, the remote is "." and the branch name is
* simply the refname. Otherwise we need to figure out what
* the remote-tracking branch's name on the remote is and use
* that.
*/
if (local)
error = git_buf_puts(&value, ".");
else
error = git_branch_remote_name(&value, repo, git_reference_name(upstream));
if (error < 0)
goto on_error;
if (git_buf_printf(&key, "branch.%s.remote", shortname) < 0)
goto on_error;
if (git_config_set_string(config, git_buf_cstr(&key), git_buf_cstr(&value)) < 0)
goto on_error;
if (local) {
git_buf_clear(&value);
if (git_buf_puts(&value, git_reference_name(upstream)) < 0)
goto on_error;
} else {
/* Get the remoe-tracking branch's refname in its repo */
if (git_remote_lookup(&remote, repo, git_buf_cstr(&value)) < 0)
goto on_error;
fetchspec = git_remote__matching_dst_refspec(remote, git_reference_name(upstream));
git_buf_clear(&value);
if (!fetchspec || git_refspec_rtransform(&value, fetchspec, git_reference_name(upstream)) < 0)
goto on_error;
git_remote_free(remote);
remote = NULL;
}
git_buf_clear(&key);
if (git_buf_printf(&key, "branch.%s.merge", shortname) < 0)
goto on_error;
if (git_config_set_string(config, git_buf_cstr(&key), git_buf_cstr(&value)) < 0)
goto on_error;
git_reference_free(upstream);
git_buf_free(&key);
git_buf_free(&value);
return 0;
on_error:
git_reference_free(upstream);
git_buf_free(&key);
git_buf_free(&value);
git_remote_free(remote);
return -1;
}
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;
}
int git_reference_is_branch(const git_reference *ref)
{
assert(ref);
return git_reference__is_branch(ref->name);
}