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yzhong52/replace_or_fail.sh

Created August 29, 2017 21:32
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Replace Or Fail
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replace_or_fail.sh
#!/usr/bin/env bash
replace_or_fail() {
FROM_VALUE=$1
TO_VALUE=$2
FILENAME=$3
echo "Replace from '$FROM_VALUE' to '$TO_VALUE' in '$FILENAME'... "
grep -q ${FROM_VALUE} ${FILENAME} && sed -i.old 's/'${FROM_VALUE}'/'${TO_VALUE}'/' ${FILENAME} || ( (>&2 echo "\033[0;31mError: '$FROM_VALUE' not found") && exit 1 )
echo "Done. "
}
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