Improve initialization of git directory

Using the functions offered by libgit feels like the right thing to do. Also,
make sure that config errors gets properly reported.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

2 files changed, 9 insertions, 10 deletions

diff --git a/cgit.c b/cgit.c
index b270fdc..2c933dc 100644
--- a/cgit.c
+++ b/cgit.c
@@ -74,38 +74,41 @@ char *find_default_branch(struct cgit_repo *repo)
 	for_each_branch_ref(find_current_ref, &info);
 	if (info.match)
 		return info.req_ref;
 	else
 		return info.first_ref;
 }
 
 static void cgit_print_repo_page(struct cacheitem *item)
 {
 	char *title, *tmp;
 	int show_search;
 	unsigned char sha1[20];
+	int nongit = 0;
 
-	if (chdir(ctx.repo->path)) {
-		title = fmt("%s - %s", ctx.cfg.root_title, "Bad request");
+	setenv("GIT_DIR", ctx.repo->path, 1);
+	setup_git_directory_gently(&nongit);
+	if (nongit) {
+		title = fmt("%s - %s", ctx.cfg.root_title, "config error");
+		tmp = fmt("Not a git repository: '%s'", ctx.repo->path);
+		ctx.repo = NULL;
 		cgit_print_docstart(title, item);
 		cgit_print_pageheader(title, 0);
-		cgit_print_error(fmt("Unable to scan repository: %s",
-				     strerror(errno)));
+		cgit_print_error(tmp);
 		cgit_print_docend();
 		return;
 	}
 
 	title = fmt("%s - %s", ctx.repo->name, ctx.repo->desc);
 	show_search = 0;
-	setenv("GIT_DIR", ctx.repo->path, 1);
 
 	if (!ctx.qry.head) {
 		ctx.qry.head = xstrdup(find_default_branch(ctx.repo));
 		ctx.repo->defbranch = ctx.qry.head;
 	}
 
 	if (!ctx.qry.head) {
 		cgit_print_docstart(title, item);
 		cgit_print_pageheader(title, 0);
 		cgit_print_error("Repository seems to be empty");
 		cgit_print_docend();
 		return;
@@ -170,50 +173,46 @@ static void cgit_print_repo_page(struct cacheitem *item)
 		break;
 	case CMD_DIFF:
 		cgit_print_diff(ctx.qry.sha1, ctx.qry.sha2, ctx.qry.path);
 		break;
 	default:
 		cgit_print_error("Invalid request");
 	}
 	cgit_print_docend();
 }
 
 static void cgit_fill_cache(struct cacheitem *item, int use_cache)
 {
-	static char buf[PATH_MAX];
 	int stdout2;
 
-	getcwd(buf, sizeof(buf));
 	item->st.st_mtime = time(NULL);
 
 	if (use_cache) {
 		stdout2 = chk_positive(dup(STDOUT_FILENO),
 				       "Preserving STDOUT");
 		chk_zero(close(STDOUT_FILENO), "Closing STDOUT");
 		chk_positive(dup2(item->fd, STDOUT_FILENO), "Dup2(cachefile)");
 	}
 
 	if (ctx.repo)
 		cgit_print_repo_page(item);
 	else
 		cgit_print_repolist(item);
 
 	if (use_cache) {
 		chk_zero(close(STDOUT_FILENO), "Close redirected STDOUT");
 		chk_positive(dup2(stdout2, STDOUT_FILENO),
 			     "Restoring original STDOUT");
 		chk_zero(close(stdout2), "Closing temporary STDOUT");
 	}
-
-	chdir(buf);
 }
 
 static void cgit_check_cache(struct cacheitem *item)
 {
 	int i = 0;
 
  top:
 	if (++i > ctx.cfg.max_lock_attempts) {
 		die("cgit_refresh_cache: unable to lock %s: %s",
 		    item->name, strerror(errno));
 	}
 	if (!cache_exist(item)) {
diff --git a/ui-shared.c b/ui-shared.c
index b9f487a..cc1ab8b 100644
--- a/ui-shared.c
+++ b/ui-shared.c
@@ -467,25 +467,25 @@ void cgit_print_pageheader(char *title, int show_search)
 	static const char *default_info = "This is cgit, a fast webinterface for git repositories";
 	int header = 0;
 	char *url;
 
 	html("<table id='layout' summary=''>\n");
 	html("<tr><td id='sidebar'>\n");
 	html("<table class='sidebar' cellspacing='0' summary=''>\n");
 	html("<tr><td class='sidebar'>\n<a href='");
 	html_attr(cgit_rooturl());
 	htmlf("'><img src='%s' alt='cgit'/></a>\n",
 	      ctx.cfg.logo);
 	html("</td></tr>\n<tr><td class='sidebar'>\n");
-	if (ctx.qry.repo) {
+	if (ctx.repo) {
 		html("<h1 class='first'>");
 		html_txt(strrpart(ctx.repo->name, 20));
 		html("</h1>\n");
 		html_txt(ctx.repo->desc);
 		if (ctx.repo->owner) {
 			html("<h1>owner</h1>\n");
 			html_txt(ctx.repo->owner);
 		}
 		html("<h1>navigate</h1>\n");
 		reporevlink(NULL, "summary", NULL, "menu", ctx.qry.head,
 			    NULL, NULL);
 		cgit_log_link("log", NULL, "menu", ctx.qry.head, NULL, NULL,