59 lines
1.0 KiB
Plaintext
59 lines
1.0 KiB
Plaintext
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#!/bin/sh
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usage () {
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cat <<EOF>&2
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Usage: ${0##*/} [OPTIONS] SEARCH REPLACE [FILES]
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Replace SEARCH by REPLACE in FILES. If no file is provided, use stdin.
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Backslashes are interpreted in SEARCH and REPLACE (e.g. \n, \t). If you want to
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inhibit this behaviour, you need to double them.
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Options:
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-h: Show this help.
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-i: Replace file content instead of printing to stdout.
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EOF
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}
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OPT_INPLACE=""
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while getopts ":ih" opt; do
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case $opt in
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i)
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OPT_INPLACE=-i ;;
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h)
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usage
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exit 1 ;;
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\?)
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usage
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exit 1 ;;
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esac
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done
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shift $((OPTIND - 1))
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if [ $# -lt 2 ]; then
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usage
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exit 1
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fi
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search="$1"
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replace="$2"
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shift 2
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replace () {
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## We cannot use gsub, otherwise regex substitutions could occur.
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## Source: http://mywiki.wooledge.org/BashFAQ/021
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awk -v s="$search" -v r="$replace" 'BEGIN {l=length(s)} {o="";while (i=index($0, s)) {o=o substr($0,1,i-1) r; $0=substr($0,i+l)} print o $0}' "$@"
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}
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if [ $# -eq 0 ] || [ -z "$OPT_INPLACE" ]; then
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replace "$@"
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else
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for i ; do
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out="$(mktemp "$i.XXXXXX")"
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replace "$i" > "$out"
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mv "$out" "$i"
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done
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fi
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