From 6d91bf3b0c423f647094846b8c9ec2c8d9829f9e Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Fri, 25 Jan 2008 09:27:30 +0000
Subject: * common.mk (revision.h): extracts revision number with ``svn info''.

* common.mk (up): target to update from the repository.

* Makefile.in, {win,bcc}32/Makefile.sub (IFCHANGE): tool to update a
  file if changed.

* tool/ifchange: for unixen.

* win32/ifchange.bat: some fix


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@15234 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 win32/ifchange.bat | 41 ++++++++++++++++++++++++++++++++++-------
 1 file changed, 34 insertions(+), 7 deletions(-)

(limited to 'win32/ifchange.bat')

diff --git a/win32/ifchange.bat b/win32/ifchange.bat
index 4fca646ea2..8411099020 100755
--- a/win32/ifchange.bat
+++ b/win32/ifchange.bat
@@ -1,13 +1,23 @@
 @echo off
 :: usage: ifchange target temporary
 
+if "%1" == "" goto :end
+
+set dest=%1
+set src=%2
+set dest=%dest:/=\%
+set src=%src:/=\%
+if not "%dest%" == "" if not "%dest%" == "%%dest:/=\%%" goto :nt
+
+if not exist %2 goto :end
+
 :: check if fc.exe works.
-echo foo > conftest1.tmp
-echo bar > conftest2.tmp
-fc.exe conftest1.tmp conftest2.tmp > nul
+echo foo > conftst1.tmp
+echo bar > conftst2.tmp
+fc.exe conftst1.tmp conftst2.tmp > nul
 if not errorlevel 1 goto :brokenfc
-del conftest1.tmp > nul
-del conftest2.tmp > nul
+del conftst1.tmp > nul
+del conftst2.tmp > nul
 
 :: target does not exist or new file differs from it.
 if not exist %1 goto :update
@@ -27,6 +37,23 @@ echo assuming %1 should be changed.
 
 :update
 echo %1 updated.
-if exist %1 del %1
-copy %2 %1 > nul
+:: if exist %1 del %1
+dir /b %2
+copy %2 %1
+del %2
+goto :end
+
+:nt
+if not exist %src% goto :end
+if exist %dest% (
+    fc.exe %dest% %src% > nul && (
+	echo %dest% unchanged.
+	del %src%
+	goto :end
+    )
+)
+echo %dest% updated.
+copy %src% %dest% > nul
+del %src%
+
 :end
-- 
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