【Rails 5.2 版】スマートな rails new コマンドの叩き方

自分はいつもプライベートの開発ではこんな感じで rails new やってます、というのを備忘録もかねて載せておきます。

基本的に使うか分からないライブラリのファイルは生成しないようにしています。後から genarate コマンドで簡単に追加できるので。

通常の Rails アプリ

$ bundle exec rails new . -TMCGB -d postgresql --skip-turbolinks --skip-coffee --skip-active-storage

API 専用の Rails アプリ

--api つけると そもそも js 系のファイルが生成されないので、以下のオプションで OK。

$ bundle exec rails new . --api -TMCGB -d postgresql --skip-active-storage

オプション説明

• -TMC
  • Test, Action Mailer, Action Cableの作成をスキップ
• -G
  • .gitignore ファイルを上書きしない（あと自動で git init しない）
• -B
  • rails new 時に bundle install しない（ Gemfile を編集してから bundle install するので）
• -d postgresql
  • DB を PostgreSQL に変更
• あとはもろもろライブラリをスキップ

参考

$ bundle exec rails new -h

Options:
      [--skip-namespace], [--no-skip-namespace]            # Skip namespace (affects only isolated applications)
  -r, [--ruby=PATH]                                        # Path to the Ruby binary of your choice
                                                           # Default: /Users/daidoshota/.rbenv/versions/2.5.0/bin/ruby
  -m, [--template=TEMPLATE]                                # Path to some application template (can be a filesystem path or URL)
  -d, [--database=DATABASE]                                # Preconfigure for selected database (options: mysql/postgresql/sqlite3/oracle/frontbase/ibm_db/sqlserver/jdbcmysql/jdbcsqlite3/jdbcpostgresql/jdbc)
                                                           # Default: sqlite3
      [--skip-yarn], [--no-skip-yarn]                      # Don't use Yarn for managing JavaScript dependencies
      [--skip-gemfile], [--no-skip-gemfile]                # Don't create a Gemfile
  -G, [--skip-git], [--no-skip-git]                        # Skip .gitignore file
      [--skip-keeps], [--no-skip-keeps]                    # Skip source control .keep files
  -M, [--skip-action-mailer], [--no-skip-action-mailer]    # Skip Action Mailer files
  -O, [--skip-active-record], [--no-skip-active-record]    # Skip Active Record files
      [--skip-active-storage], [--no-skip-active-storage]  # Skip Active Storage files
  -P, [--skip-puma], [--no-skip-puma]                      # Skip Puma related files
  -C, [--skip-action-cable], [--no-skip-action-cable]      # Skip Action Cable files
  -S, [--skip-sprockets], [--no-skip-sprockets]            # Skip Sprockets files
      [--skip-spring], [--no-skip-spring]                  # Don't install Spring application preloader
      [--skip-listen], [--no-skip-listen]                  # Don't generate configuration that depends on the listen gem
      [--skip-coffee], [--no-skip-coffee]                  # Don't use CoffeeScript
  -J, [--skip-javascript], [--no-skip-javascript]          # Skip JavaScript files
      [--skip-turbolinks], [--no-skip-turbolinks]          # Skip turbolinks gem
  -T, [--skip-test], [--no-skip-test]                      # Skip test files
      [--skip-system-test], [--no-skip-system-test]        # Skip system test files
      [--skip-bootsnap], [--no-skip-bootsnap]              # Skip bootsnap gem
      [--dev], [--no-dev]                                  # Setup the application with Gemfile pointing to your Rails checkout
      [--edge], [--no-edge]                                # Setup the application with Gemfile pointing to Rails repository
      [--rc=RC]                                            # Path to file containing extra configuration options for rails command
      [--no-rc], [--no-no-rc]                              # Skip loading of extra configuration options from .railsrc file
      [--api], [--no-api]                                  # Preconfigure smaller stack for API only apps
  -B, [--skip-bundle], [--no-skip-bundle]                  # Don't run bundle install
      [--webpack=WEBPACK]                                  # Preconfigure for app-like JavaScript with Webpack (options: react/vue/angular/elm/stimulus)

Runtime options:
  -f, [--force]                    # Overwrite files that already exist
  -p, [--pretend], [--no-pretend]  # Run but do not make any changes
  -q, [--quiet], [--no-quiet]      # Suppress status output
  -s, [--skip], [--no-skip]        # Skip files that already exist


# Options, Runtime options 以外は省略