Setting up "Rubocop" to run on "Docker compose" using "ALE"

local.vimrc

# .local.vimrc

let g:ale_ruby_rubocop_executable = 'bin/rubocop'

let g:ale_filename_mappings = {
  \ 'rubocop': [
  \   ['/Users/kseki/rails-project', '/opt'],
  \ ],
  \}

rubocop

#  bin/rubocop

#!/usr/bin/env ruby

require 'pathname'
require 'fileutils'

include FileUtils

APP_ROOT = Pathname.new File.expand_path('../../', __FILE__)

chdir APP_ROOT do
  rubocop_command = "bundle exec rubocop #{ARGV.join(' ')}"
  system("docker-compose exec -T app #{rubocop_command}'")
end