This is an executable I use to simply the execution of commands inside a docker container

run

#!/usr/bin/ruby
require 'yaml'
require 'optparse'

options = {}

opt_parser = OptionParser.new do |opt|
  opt.banner = 'Usage: run bash'
  opt.separator  ''
  opt.separator  'Example:'
  opt.separator  '  run --start'
  opt.separator  '  run bash # or every command you want to run in the container'
  opt.separator  '  run --stop'
  opt.separator  '  run --remove'
  opt.separator  ''
  opt.separator  'You can set the project and the service in `.run.yml` file at the top level of the project.'
  opt.separator  'The file have to be like this: '
  opt.separator  '    run:'
  opt.separator  '      service: app'
  opt.separator  '      project: project'
  opt.separator  ''
  opt.separator  'Options'

  opt.on('-p', '--project PROJECT', 'which project you want to run') do |value|
    options[:project] = value
  end

  opt.on('-s', '--service SERVICE', 'which service have to be used') do |value|
    options[:service] = value
  end

  opt.on('--rerun', 'stop the current container and exec the command') do
    options[:rerun] = true
  end

  opt.on('--start', 'start a new container') do
    options[:start] = true
  end

  opt.on('--stop', 'stop the container') do
    options[:stop] = true
  end

  opt.on('--remove', 'stop and remove the container') do
    options[:remove] = true
  end
end

opt_parser.parse!

class Docker
  attr_accessor :config

  def initialize(config:)
    @config = config
  end

  def exec
    args = ARGV.join(' ')
    command = "docker exec -it #{project}_dev #{args}"
    system command
    raise if $?.exitstatus == 1
  end

  def start
    stop
    system "docker-compose run -d --name #{project}_dev #{service} bundle exec spring server"
  end

  def stop
    system "docker stop #{project}_dev"
  end

  def remove
    system "docker rm #{project}_dev"
  end

  private

  def project
    config['project']
  end

  def service
    config['service']
  end
end

root = `git rev-parse --show-toplevel`.chomp
config = YAML.load_file("#{root}/.run.yml")['run']
config['service'] = options[:service] if options[:service]
config['project'] = options[:project] if options[:project]

docker = Docker.new(config: config)

if options[:rerun]
  docker.stop
  docker.remove
  docker.run
  docker.exec
elsif options[:stop]
  docker.stop
elsif options[:remove]
  docker.stop
  docker.remove
elsif options[:start]
  docker.start
elsif ARGV.empty?
  puts opt_parser
else
  docker.exec
end