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author | yugui <yugui@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2008-08-25 15:02:05 +0000 |
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committer | yugui <yugui@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2008-08-25 15:02:05 +0000 |
commit | 0dc342de848a642ecce8db697b8fecd83a63e117 (patch) | |
tree | 2b7ed4724aff1f86073e4740134bda9c4aac1a39 /trunk/tool/ifchange | |
parent | ef70cf7138ab8034b5b806f466e4b484b24f0f88 (diff) |
added tag v1_9_0_4
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/tags/v1_9_0_4@18845 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'trunk/tool/ifchange')
-rwxr-xr-x | trunk/tool/ifchange | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/trunk/tool/ifchange b/trunk/tool/ifchange new file mode 100755 index 0000000000..544513ad15 --- /dev/null +++ b/trunk/tool/ifchange @@ -0,0 +1,17 @@ +#!/bin/sh +# usage: ifchange target temporary + +target="$1" +temp="$2" +if [ "$temp" = - ]; then + temp="tmpdata$$.tmp~" + cat > "$temp" || exit $? + trap 'rm -f "$temp"' 0 +fi +if cmp "$target" "$temp" >/dev/null 2>&1; then + echo "$target unchanged" + rm -f "$temp" +else + echo "$target updated" + mv -f "$temp" "$target" +fi |