From 2bb561ea5f96f8b6edd622be16be89ee6af3cd7e Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Mon, 16 Mar 2009 03:30:01 +0000
Subject: * common.mk (REVISION_H): keeps timestamp of revision.h.  
 [ruby-core:22900]

* tool/ifchange, win32/ifchange.bat: extended --timestamp option.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@22974 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 tool/ifchange | 36 ++++++++++++++++++++++++++++++------
 1 file changed, 30 insertions(+), 6 deletions(-)

(limited to 'tool')

diff --git a/tool/ifchange b/tool/ifchange
index 8bfca26703..ca2ea40644 100755
--- a/tool/ifchange
+++ b/tool/ifchange
@@ -1,11 +1,22 @@
 #!/bin/sh
 # usage: ifchange target temporary
 
-unset timestamp
-if [ "$1" = --timestamp ]; then
-    timestamp=yes
+timestamp=
+until [ "$0" = 0 ]; do
+    case "$1" in
+	--timestamp)
+	    timestamp=.
+	    ;;
+	--timestamp=*)
+	    timestamp="${1#*=}" || timestamp=`expr "$1" : '[^=]*=\(.*\)'`
+	    ;;
+	*)
+	    break
+	    ;;
+    esac
     shift
-fi
+done
+
 target="$1"
 temp="$2"
 if [ "$temp" = - ]; then
@@ -13,6 +24,7 @@ if [ "$temp" = - ]; then
     cat > "$temp" || exit $?
     trap 'rm -f "$temp"' 0
 fi
+
 if cmp "$target" "$temp" >/dev/null 2>&1; then
     echo "$target unchanged"
     rm -f "$temp"
@@ -20,6 +32,18 @@ else
     echo "$target updated"
     mv -f "$temp" "$target"
 fi
-if [ $timestamp ]; then
-    touch `dirname "$target"`/.time.`basename "$target"`
+
+if [ -n "${timestamp}" ]; then
+    if [ x"${timestamp}" = x. ]; then
+	case "$target" in
+	    */*)
+		timestamp="${target%/*}"/.time."${target##*/}" ||
+		timestamp=`dirname "$target"`/.time.`basename "$target"`
+		;;
+	    *)
+		timestamp=.time."$target"
+		;;
+	esac
+    fi
+    : > "$timestamp"
 fi
-- 
cgit v1.2.3