From ba066ae56395d481d669d69c4ad14d9a268c0762 Mon Sep 17 00:00:00 2001
From: Bryce Kwon <bryce@brycekwon.com>
Date: Sun, 1 Nov 2026 10:18:08 -1000
Subject: Lead a blame page's folder crumbs to the tree

---
 source/ui-shared.c  | 19 +++++++++++++++++--
 tests/t0104-tree.sh | 16 ++++++++++++++++
 2 files changed, 33 insertions(+), 2 deletions(-)

diff --git a/source/ui-shared.c b/source/ui-shared.c
index 23daa2b..0eeda44 100644
--- a/source/ui-shared.c
+++ b/source/ui-shared.c
@@ -618,6 +618,21 @@ static void self_link(const char *name, const char *title, const char *class)
 		reporevlink(ctx.qry.page, name, title, class, ctx.qry.head, NULL, ctx.qry.path);
 }
 
+/*
+ * A crumb leads to the same page for the prefix it stands for, except that
+ * blame takes a file alone, so on that page a folder's crumb leads to the
+ * tree.
+ */
+static void crumb_link(const char *name, int folder)
+{
+	const char *rev = ctx.qry.has_oid ? ctx.qry.oid : NULL;
+
+	if (folder && !strcmp(ctx.qry.page, "blame"))
+		cgit_tree_link(name, NULL, NULL, ctx.qry.head, rev, ctx.qry.path);
+	else
+		self_link(name, NULL, NULL);
+}
+
 static void print_path_crumbs(char *path)
 {
 	char *old_path = ctx.qry.path;
@@ -625,7 +640,7 @@ static void print_path_crumbs(char *path)
 	int levels = 0;
 
 	ctx.qry.path = NULL;
-	self_link("root", NULL, NULL);
+	crumb_link("root", 1);
 	// self_link reads the path out of ctx.qry, so terminating the buffer at
 	// each slash is what makes a crumb link to the prefix it stands for.
 	ctx.qry.path = start = path;
@@ -634,7 +649,7 @@ static void print_path_crumbs(char *path)
 			slash = end;
 		*slash = '\0';
 		html_txt("/");
-		self_link(start, NULL, NULL);
+		crumb_link(start, slash < end);
 		if (slash < end)
 			*slash = '/';
 		start = slash + 1;
diff --git a/tests/t0104-tree.sh b/tests/t0104-tree.sh
index 26a0cb4..754b3e1 100755
--- a/tests/t0104-tree.sh
+++ b/tests/t0104-tree.sh
@@ -79,6 +79,22 @@ test_expect_success 'the blame stripes are as wide as the escaped line' '
 	grep "^ \\{31\\}</pre></div>" tmp
 '
 
+# Blame takes a file alone, so on its page the crumbs for the folders above
+# the file lead to the tree.
+test_expect_success 'the folder crumbs of a blame page lead to the tree' '
+	mkrepo repos/nested 1 &&
+	(
+		cd repos/nested &&
+		mkdir -p a/b &&
+		echo x >a/b/file.txt &&
+		git add a &&
+		git commit -m nested
+	) &&
+	cgitrc_repo nestedrc nested enable-blame=1 &&
+	cgit_rc nestedrc "url=nested/blame/a/b/file.txt" >tmp &&
+	grep "path: <a href=./nested/tree/.>root</a>/<a href=./nested/tree/a.>a</a>/<a href=./nested/tree/a/b.>b</a>/<a href=./nested/blame/a/b/file.txt.>file.txt</a>" tmp
+'
+
 test_expect_success 'generate foo+bar/tree' 'cgit_url "foo%2bbar/tree" >tmp'
 
 test_expect_success 'verify a+b link' '
-- 
cgit 2.12.1