helm/bin/replace

#!/usr/bin/env bash
set -e
unset CDPATH

# Find and replace by a given list of files.
#
# replace foo bar **/*.rb

main() {
  local search="$1"
  local replace="$2"
  shift 2

  for item in $(ag -l --nocolor "$search" "$@"); do
    sed -i "s%${search//%/\\%}%${replace//%/\\%}%g" "$item"
  done
}

# Show matches
ag "$1"

# Are you sure?
read -rp "Confirm search+replace? (y/n)?" choice
case $choice in
  y|Y) main "$@" ;;
  *) >&2 echo "Aborted"; exit ;;
esac