#!/usr/bin/env bash
#
# dellines deletes lines in multiple files matching a regex
# Example: dellines '^//' src/ *.go

set -e

matchpattern="$1"
path="$2"
filepattern="$3"

if [ -z "$path" ]; then
  echo "Usage: dellines <pattern> <path>"
  exit 1
fi

if [ -z "$filepattern" ]; then
  filepattern="*"
fi

if [ $(uname -s) = "Linux" ]; then
  echo "TODO: fix for Linux"
fi

find "$path" -type f -name "$filepattern" -print0 | LC_CTYPE=C LANG=C xargs -0 sed -i '' "/$matchpattern/d"