Recursive replace in directory, replacement is dynamically created by ruby code

gsubrb

#!/usr/bin/env ruby
# frozen_string_literal: true

require 'optparse'
require 'active_support/all'

options = {}
OptionParser.new do |opts|
  opts.banner = 'Usage: gsubrb [options]'
  opts.on('-r', '--replace [CODE]', String, 'Block that will be executed for each match') do |code|
    options[:code] = code
  end
  opts.on('-f', '--find [REGEXP]', Regexp, 'Regexp to find') do |regexp|
    options[:regexp] = regexp
  end
end.parse!

options[:replacer] = eval("->(str, match) do #{options[:code]} end", nil, 'cmdline', 1)

def color(color, str)
  ActiveSupport::LogSubscriber.new.send(:color, str, color)
end

def confirm
  STDIN.gets.chomp == 'y'
end
p options

def run_search(options, replace)
  replacer = options[:replacer]
  `rg --files`.split("\n").each do |file|
    contents = File.read(file)
    next unless contents.valid_encoding?

    lines = contents.split("\n", -1)

    changed = false

    new_lines = lines.each_with_index.map do |line, index|
      line.gsub(options[:regexp]) do |str|
        match = Regexp.last_match
        resp = replacer.call(str, match).to_s
        if resp != str
          puts "In file #{color(:cyan, file)}:#{color(:blue, index + 1)}"
          puts "#{match.pre_match}#{color(:red, str)}#{match.post_match}"
          puts "#{match.pre_match}#{color(:green, resp)}#{match.post_match}"
        end
        changed ||= resp != str
        resp
      end
    end
    File.write(file, new_lines.join("\n")) if changed && replace
  end
end

run_search(options, false)
puts
puts 'replace?'
run_search(options, true) if confirm