From fcbf63e62c627deae76c1b8cb8c0876c536ed811 Mon Sep 17 00:00:00 2001
From: Jari Vetoniemi <jari.vetoniemi@indooratlas.com>
Date: Mon, 16 Mar 2020 18:49:26 +0900
Subject: Fresh start

---
 jni/ruby/win32/ifchange.bat | 95 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 95 insertions(+)
 create mode 100755 jni/ruby/win32/ifchange.bat

(limited to 'jni/ruby/win32/ifchange.bat')

diff --git a/jni/ruby/win32/ifchange.bat b/jni/ruby/win32/ifchange.bat
new file mode 100755
index 0000000..ed10914
--- /dev/null
+++ b/jni/ruby/win32/ifchange.bat
@@ -0,0 +1,95 @@
+@echo off
+:: usage: ifchange target temporary
+
+set timestamp=
+set keepsuffix=
+set empty=
+:optloop
+for %%I in (%1) do set opt=%%~I
+if "%opt%" == "--timestamp" (
+    set timestamp=.
+    shift
+    goto :optloop
+) else if "%opt:~0,12%" == "--timestamp=" (
+    set timestamp=%opt:~12%
+    shift
+    goto :optloop
+) else if "%opt%" == "--keep" (
+    set keepsuffix=.old
+    shift
+    goto :optloop
+) else if "%opt:~0,7%" == "--keep=" (
+    set keepsuffix=%opt:~7%
+    shift
+    goto :optloop
+) else if "%opt%" == "--empty" (
+    set empty=yes
+    shift
+    goto :optloop
+)
+if "%opt%" == "" 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 > conftst1.tmp
+echo bar > conftst2.tmp
+fc.exe conftst1.tmp conftst2.tmp > nul
+if not errorlevel 1 goto :brokenfc
+del conftst1.tmp > nul
+del conftst2.tmp > nul
+
+:: target does not exist or new file differs from it.
+if not exist %1 goto :update
+fc.exe %1 %2 > nul
+if errorlevel 1 goto :update
+
+:unchange
+echo %1 unchanged.
+del %2
+goto :end
+
+:brokenfc
+del conftest1.tmp > nul
+del conftest2.tmp > nul
+echo FC.EXE does not work properly.
+echo assuming %1 should be changed.
+
+:update
+echo %1 updated.
+:: if exist %1 del %1
+dir /b %2
+if "%keepsuffix%" != "" %1 %1%keepsuffix%
+copy %2 %1
+del %2
+goto :end
+
+:nt
+if exist %dest% (
+    if not exist %src% goto :nt_unchanged1
+    if "%empty%" == "" for %%I in (%src%) do if %%~zI == 0 goto :nt_unchanged
+    fc.exe %dest% %src% > nul && (
+      :nt_unchanged
+	del %src%
+      :nt_unchanged1
+	for %%I in (%1) do echo %%~I unchanged
+	goto :nt_end
+    )
+)
+for %%I in (%1) do echo %%~I updated
+copy %src% %dest% > nul
+del %src%
+
+:nt_end
+if "%timestamp%" == "" goto :end
+    if "%timestamp%" == "." (
+        for %%I in ("%dest%") do set timestamp=%%~dpI.time.%%~nxI
+    )
+    goto :end > "%timestamp%"
+:end
-- 
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