static int remote_name(git_buf *buf, git_repository *repo, const char *canonical_branch_name)
{
git_strarray remote_list = {0};
size_t i;
git_remote *remote;
const git_refspec *fetchspec;
int error = 0;
char *remote_name = NULL;
assert(buf && repo && canonical_branch_name);
/* Verify that this is a remote branch */
if (!git_reference__is_remote(canonical_branch_name)) {
giterr_set(GITERR_INVALID, "Reference '%s' is not a remote branch.",
canonical_branch_name);
error = GIT_ERROR;
goto cleanup;
}
/* Get the remotes */
if ((error = git_remote_list(&remote_list, repo)) < 0)
goto cleanup;
/* Find matching remotes */
for (i = 0; i < remote_list.count; i++) {
if ((error = git_remote_load(&remote, repo, remote_list.strings[i])) < 0)
continue;
fetchspec = git_remote__matching_dst_refspec(remote, canonical_branch_name);
if (fetchspec) {
/* If we have not already set out yet, then set
* it to the matching remote name. Otherwise
* multiple remotes match this reference, and it
* is ambiguous. */
if (!remote_name) {
remote_name = remote_list.strings[i];
} else {
git_remote_free(remote);
error = GIT_EAMBIGUOUS;
goto cleanup;
}
}
git_remote_free(remote);
}
if (remote_name) {
git_buf_clear(buf);
error = git_buf_puts(buf, remote_name);
} else {
error = GIT_ENOTFOUND;
}
cleanup:
git_strarray_free(&remote_list);
return error;
}
int git_reference_is_remote(const git_reference *ref)
{
assert(ref);
return git_reference__is_remote(ref->name);
}
