Subject: [PATCH 1/1] worktree refs: fix case sensitivity for 'head'

From: "Michael Rappazzo via GitGitGadget" <[email-masked]>
Date: Thu, 13 Dec 2018 11:54:11 -0800 (PST)

From: Michael Rappazzo <[email-masked]>

On a worktree which is not the primary, using the symbolic-ref 'head' was
incorrectly pointing to the main worktree's HEAD.  The same was true for
any other case of the word 'Head'.

Signed-off-by: Michael Rappazzo <[email-masked]>
---
 refs.c                   | 8 ++++----
 t/t1415-worktree-refs.sh | 9 +++++++++
 2 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/refs.c b/refs.c
index f9936355cd..963e786458 100644
--- a/refs.c
+++ b/refs.c
@@ -579,7 +579,7 @@ int expand_ref(const char *str, int len, struct object_id *oid, char **ref)
 				*ref = xstrdup(r);
 			if (!warn_ambiguous_refs)
 				break;
-		} else if ((flag & REF_ISSYMREF) && strcmp(fullref.buf, "HEAD")) {
+		} else if ((flag & REF_ISSYMREF) && strcasecmp(fullref.buf, "HEAD")) {
 			warning(_("ignoring dangling symref %s"), fullref.buf);
 		} else if ((flag & REF_ISBROKEN) && strchr(fullref.buf, '/')) {
 			warning(_("ignoring broken ref %s"), fullref.buf);
@@ -627,7 +627,7 @@ int dwim_log(const char *str, int len, struct object_id *oid, char **log)
 
 static int is_per_worktree_ref(const char *refname)
 {
-	return !strcmp(refname, "HEAD") ||
+	return !strcasecmp(refname, "HEAD") ||
 		starts_with(refname, "refs/worktree/") ||
 		starts_with(refname, "refs/bisect/") ||
 		starts_with(refname, "refs/rewritten/");
@@ -847,7 +847,7 @@ int should_autocreate_reflog(const char *refname)
 		return starts_with(refname, "refs/heads/") ||
 			starts_with(refname, "refs/remotes/") ||
 			starts_with(refname, "refs/notes/") ||
-			!strcmp(refname, "HEAD");
+			!strcasecmp(refname, "HEAD");
 	default:
 		return 0;
 	}
@@ -855,7 +855,7 @@ int should_autocreate_reflog(const char *refname)
 
 int is_branch(const char *refname)
 {
-	return !strcmp(refname, "HEAD") || starts_with(refname, "refs/heads/");
+	return !strcasecmp(refname, "HEAD") || starts_with(refname, "refs/heads/");
 }
 
 struct read_ref_at_cb {
diff --git a/t/t1415-worktree-refs.sh b/t/t1415-worktree-refs.sh
index b664e51250..e7f8a129fd 100755
--- a/t/t1415-worktree-refs.sh
+++ b/t/t1415-worktree-refs.sh
@@ -76,4 +76,13 @@ test_expect_success 'reflog of worktrees/xx/HEAD' '
 	test_cmp expected actual.wt2
 '
 
+test_expect_success 'head, Head, and HEAD are the same in worktree' '
+	test_cmp_rev worktree/foo initial &&
+	git -C wt1 rev-parse HEAD >uc_ref.wt1 &&
+	git -C wt1 rev-parse Head >mc_ref.wt1 &&
+	git -C wt1 rev-parse head >lc_ref.wt1 &&
+	test_cmp uc_ref.wt1 lc_ref.wt1 &&
+	test_cmp uc_ref.wt1 mc_ref.wt1
+'
+
 test_done
-- 
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