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author | nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2013-11-03 12:40:24 +0000 |
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committer | nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2013-11-03 12:40:24 +0000 |
commit | bcfb4569aa70f94711ee19630dbd76fecd8dffe7 (patch) | |
tree | 64edf1ca2513d74eb577ab3c9dec3ee83258221d /tool | |
parent | ddf1d3aaed4d07d8fb00f4c3a81b6a83bd0225e8 (diff) | |
download | ruby-bcfb4569aa70f94711ee19630dbd76fecd8dffe7.tar.gz |
ifchange: no overwrite with an empty file
* tool/ifchange, win32/ifchange.bat: do not overwrite with an empty
file by default, and add --empty option to force it.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43519 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'tool')
-rwxr-xr-x | tool/ifchange | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/tool/ifchange b/tool/ifchange index 5695e5a9b8..488e9db26e 100755 --- a/tool/ifchange +++ b/tool/ifchange @@ -4,6 +4,7 @@ set -e timestamp= keepsuffix= +empty= until [ $# -eq 0 ]; do case "$1" in --timestamp) @@ -18,6 +19,9 @@ until [ $# -eq 0 ]; do --keep=*) keepsuffix=`expr \( "$1" : '[^=]*=\(.*\)' \)` ;; + --empty) + empty=yes + ;; *) break ;; @@ -33,7 +37,7 @@ if [ "$temp" = - ]; then trap 'rm -f "$temp"' 0 fi -if cmp "$target" "$temp" >/dev/null 2>&1; then +if [ -f "$target" -a ! -${empty:+f}${empty:-s} "$temp" ] || cmp "$target" "$temp" >/dev/null 2>&1; then echo "$target unchanged" rm -f "$temp" else |