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* tool/ifchange: commit miss.

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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@15235 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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nobu 2008-01-25 10:22:32 +00:00
parent 6d91bf3b0c
commit 8af627ba4a
1 changed files with 16 additions and 0 deletions
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16
tool/ifchange Executable file
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@ -0,0 +1,16 @@
#!/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 "$target unchanged"
else
echo "$target updated"
mv -f "$temp" "$target"
fi