replace.sh

replace.sh

#!/usr/bin/env bash
#
# String replace on a file, or all files in a directory
# Author: Zemian Deng 10/26/2012
#
# Usage:
# ./replace.sh my_file localhost `hostname`
# ./replace.sh my_dir localhost `hostname`
# DRY=1 ./replace.sh my_dir localhost `hostname`
#

DIR='.'
FROM='localhost'
TO=`hostname`
if [[ $# -ge 1 ]]; then DIR=$1; fi
if [[ $# -ge 2 ]]; then	FROM=$2; fi
if [[ $# -ge 3 ]]; then	TO=$3; fi

if [[ -d $DIR ]]; then
	echo "Replacing all files in dir $DIR from $FROM to $TO"
	echo find $DIR -type f -exec perl -i -pe "s/$FROM/$TO/g" {} \;
	if [[ "$DRY" != "" ]]; then
		echo "Dry run only."
	else
		find $DIR -type f -exec perl -i -pe "s/$FROM/$TO/g" {} \;
	fi
else
	echo "Replacing file $DIR from $FROM to $TO"
	echo perl -i -pe "s/$FROM/$TO/g" $DIR
	if [[ "$DRY" != "" ]]; then
		echo "Dry run only."
	else
		perl -i -pe "s/$FROM/$TO/g" $DIR
	fi
fi