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|
#!/bin/bash
function usage {
echo "usage: add_head.sh [-t] file headfile"
echo " -t : test only (do not patch)"
}
function add_head {
TEST_ONLY=0
if [ -z "$1" -o -z "$2" ] ; then
usage
exit 1
fi
if [ "$1" = "-t" -a -z "$3" ] ; then
usage
exit 1
fi
if [ "$1" = "-t" ] ; then
TEST_ONLY=1
FILE="$2"
HEAD="$3"
FILENEW="$2--"
else
FILE="$1"
HEAD="$2"
FILENEW="$1--"
fi
TMP=`mktemp`
L=`wc -l $HEAD | cut -f 1 -d " "`
head -n $L $FILE > $TMP
if diff $TMP $HEAD >/dev/null; then
echo "skipping $FILE"
else
if [ $TEST_ONLY -eq 0 ] ; then
mv $FILE $FILENEW
cat $HEAD $FILENEW > $FILE
rm $FILENEW
else
echo "patching $FILE"
fi
fi
rm $TMP
}
add_head "$@"
|
