git-storage: add helper function to delete remote branch

This will be used by the test to clean up test branches that are created
on the server. Since we aren't testing that functionality (it's not
something that Subsurface itself ever does) the helper prints out errors
it encounters, but doesn't report them back to the caller.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

1 files changed, 51 insertions, 0 deletions

diff --git a/core/git-access.c b/core/git-access.c
index 1a18746d8..b9292072d 100644
--- a/core/git-access.c
+++ b/core/git-access.c
@@ -572,6 +572,57 @@ static int check_remote_status(git_repository *repo, git_remote *origin, const c
 	return error;
 }
 
+/* this is (so far) only used by the git storage tests to remove a remote branch
+ * it will print out errors, but not return an error (as this isn't a function that
+ * we test as part of the tests, it's a helper to not leave loads of dead branches on
+ * the server)
+ */
+void delete_remote_branch(git_repository *repo, const char *remote, const char *branch)
+{
+	int error;
+	char *proxy_string;
+	git_remote *origin;
+	git_config *conf;
+
+	/* set up the config and proxy information in order to connect to the server */
+	git_repository_config(&conf, repo);
+	if (getProxyString(&proxy_string)) {
+		git_config_set_string(conf, "http.proxy", proxy_string);
+		free(proxy_string);
+	} else {
+		git_config_delete_entry(conf, "http.proxy");
+	}
+	if (git_remote_lookup(&origin, repo, "origin")) {
+		fprintf(stderr, "Repository '%s' origin lookup failed (%s)", remote, giterr_last() ? giterr_last()->message : "(unspecified)");
+		return;
+	}
+	/* fetch the remote state */
+	git_fetch_options f_opts = GIT_FETCH_OPTIONS_INIT;
+	auth_attempt = 0;
+	f_opts.callbacks.credentials = credential_https_cb;
+	error = git_remote_fetch(origin, NULL, &f_opts, NULL);
+	if (error) {
+		fprintf(stderr, "remote fetch failed (%s)\n", giterr_last() ? giterr_last()->message : "authentication failed");
+		return;
+	}
+	/* delete the remote branch by pushing to ":refs/heads/<branch>" */
+	git_strarray refspec;
+	char *branch_ref = format_string(":refs/heads/%s", branch);
+	refspec.count = 1;
+	refspec.strings = &branch_ref;
+	git_push_options p_opts = GIT_PUSH_OPTIONS_INIT;
+	auth_attempt = 0;
+	p_opts.callbacks.credentials = credential_https_cb;
+	error = git_remote_push(origin, &refspec, &p_opts);
+	free(branch_ref);
+	if (error) {
+		fprintf(stderr, "Unable to delete branch '%s'", branch);
+		fprintf(stderr, "error was (%s)\n", giterr_last() ? giterr_last()->message : "(unspecified)");
+	}
+	git_remote_free(origin);
+	return;
+}
+
 int sync_with_remote(git_repository *repo, const char *remote, const char *branch, enum remote_transport rt)
 {
 	int error;