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47 lines
894 B
47 lines
894 B
# Perl grep since 'grep -P' is terrible.
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local usage pattern modifiers
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usage="$(
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cat <<EOF
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usage: $0 [-option ...] [--] pattern [file ...]
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options:
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-i ignore case
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-m ^ and $ match the start and the end of a line
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-s . matches newline
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-x ignore whitespace and comments
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EOF
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)"
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while getopts ':igmxe::' opt; do
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case "$opt" in
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(i) modifiers="${modifiers}i" ;;
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(m) modifiers="${modifiers}m" ;;
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(x) modifiers="${modifiers}x" ;;
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(e) modifiers="${modifiers}e" ;;
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(:)
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print "$0: option requires an argument: $OPTARG" >&2
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print "$usage" >&2
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return 1
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;;
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([?])
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print "$0: unknown option: $OPTARG" >&2
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print "$usage" >&2
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return 1
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;;
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esac
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done
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shift $(( $OPTIND - 1 ))
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if (( $# < 1 )); then
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print "$usage" >&2
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return 1
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fi
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pattern="$1"
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shift
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perl -n -l -e "print if m/${pattern//\//\\/}/${modifiers}" "$@"
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