#!/bin/sh

# Filters `map` error messages

selfDir="$(dirname -- "$0")"

if ! test "$#" -ge 1; then

    echo "Usage: env [n=...] $self grep-options... <input"

    exit 2

fi

"$selfDir/filter_errors_before"|grep "$@"|\

$(test -n "$n" && echo head -"$n" || echo cat)|"$selfDir/filter_errors_after"