From 6ebd99717b1fa67217d6ee6c05415082ba40eb02 Mon Sep 17 00:00:00 2001
From: zhaoke <zhaoke@easycorp.ltd>
Date: Wed, 23 Aug 2023 11:14:44 +0800
Subject: [PATCH] * Fix diff page empty when revision is first commit.

---
 lib/scm/gitrepo.class.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/scm/gitrepo.class.php b/lib/scm/gitrepo.class.php
index ad805caf62..1fd46f4fbe 100644
--- a/lib/scm/gitrepo.class.php
+++ b/lib/scm/gitrepo.class.php
@@ -310,7 +310,9 @@ class GitRepo
         if(strpos($fromRevision, '^') !== false)
         {
             $list = execCmd(escapeCmd("$this->client log -2 $toRevision --pretty=format:%H -- $path"), 'array');
-            if(isset($list[1])) $fromRevision = $list[1];
+            if(!isset($list[1])) return execCmd(escapeCmd("$this->client show HEAD"), 'array');
+
+            $fromRevision = $list[1];
         }
         $lines = execCmd(escapeCmd("$this->client diff $fromRevision $toRevision -- $path"), 'array');
         return $lines;