From 6589af52d22e1b5976295adc7968c55218d5b168 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Sat, 28 Oct 2023 14:12:10 +0900
Subject: Print the date to STDERR if STDIN is a part of input [ci skip]

---
 tool/update-bundled_gems.rb | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

(limited to 'tool')

diff --git a/tool/update-bundled_gems.rb b/tool/update-bundled_gems.rb
index 2f088804ef..f27ba98961 100755
--- a/tool/update-bundled_gems.rb
+++ b/tool/update-bundled_gems.rb
@@ -2,10 +2,11 @@
 BEGIN {
   require 'rubygems'
   date = nil
-}
-END {
   # STDOUT is not usable in inplace edit mode
   output = $-i ? STDOUT : STDERR
+}
+output = STDERR if ARGF.file == STDIN
+END {
   output.print date.strftime("latest_date=%F") if date
 }
 unless /^[^#]/ !~ (gem = $F[0])
-- 
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