Merge branch 'jk/startup-info' into maint

The startup_info data, which records if we are working inside a
repository (among other things), are now uniformly available to Git
subcommand implementations, and Git avoids attempting to touch
references when we are not in a repository.

* jk/startup-info:
  use setup_git_directory() in test-* programs
  grep: turn off gitlink detection for --no-index
  mailmap: do not resolve blobs in a non-repository
  remote: don't resolve HEAD in non-repository
  setup: set startup_info->have_repository more reliably
  setup: make startup_info available everywhere

1 files changed, 6 insertions, 5 deletions

diff --git a/remote.c b/remote.c
index fc02698587..28fd676acb 100644
--- a/remote.c
+++ b/remote.c
@@ -455,7 +455,6 @@ static void read_config(void)
 {
 	static int loaded;
 	struct object_id oid;
-	const char *head_ref;
 	int flag;
 
 	if (loaded)
@@ -463,10 +462,12 @@ static void read_config(void)
 	loaded = 1;
 
 	current_branch = NULL;
-	head_ref = resolve_ref_unsafe("HEAD", 0, oid.hash, &flag);
-	if (head_ref && (flag & REF_ISSYMREF) &&
-	    skip_prefix(head_ref, "refs/heads/", &head_ref)) {
-		current_branch = make_branch(head_ref, 0);
+	if (startup_info->have_repository) {
+		const char *head_ref = resolve_ref_unsafe("HEAD", 0, oid.hash, &flag);
+		if (head_ref && (flag & REF_ISSYMREF) &&
+		    skip_prefix(head_ref, "refs/heads/", &head_ref)) {
+			current_branch = make_branch(head_ref, 0);
+		}
 	}
 	git_config(handle_config, NULL);
 	alias_all_urls();