Module: Rails::Generators::Actions

Included in:
Base
Defined in:
railties/lib/rails/generators/actions.rb,
railties/lib/rails/generators/actions/create_migration.rb

Defined Under Namespace

Classes: CreateMigration

Instance Method Summary collapse

Instance Method Details

#add_source(source, options = {}, &block) ⇒ Object

Add the given source to Gemfile

If block is given, gem entries in block are wrapped into the source group.

add_source "http://gems.github.com/"

add_source "http://gems.github.com/" do
  gem "rspec-rails"
end



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# File 'railties/lib/rails/generators/actions.rb', line 151

def add_source(source, options = {}, &block)
  log :source, source

  in_root do
    if block
      append_file_with_newline "Gemfile", "\nsource #{quote(source)} do", force: true
      with_indentation(&block)
      append_file_with_newline "Gemfile", "end", force: true
    else
      prepend_file "Gemfile", "source #{quote(source)}\n", verbose: false
    end
  end
end

#environment(data = nil, options = {}) ⇒ Object Also known as: application

Adds configuration code to a Rails runtime environment.

By default, adds code inside the Application class in config/application.rb so that it applies to all environments.

environment %(config.asset_host = "cdn.provider.com")

Results in:

# config/application.rb
class Application < Rails::Application
  config.asset_host = "cdn.provider.com"
  # ...
end

If the :env option is specified, the code will be added to the corresponding file in config/environments instead.

environment %(config.asset_host = "localhost:3000"), env: "development"

Results in:

# config/environments/development.rb
Rails.application.configure do
  config.asset_host = "localhost:3000"
  # ...
end

:env can also be an array. In which case, the code is added to each corresponding file in config/environments.

The code can also be specified as the return value of the block:

environment do
  %(config.asset_host = "cdn.provider.com")
end

environment(nil, env: "development") do
  %(config.asset_host = "localhost:3000")
end



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# File 'railties/lib/rails/generators/actions.rb', line 206

def environment(data = nil, options = {})
  sentinel = "class Application < Rails::Application\n"
  env_file_sentinel = "Rails.application.configure do\n"
  data ||= yield if block_given?

  in_root do
    if options[:env].nil?
      inject_into_file "config/application.rb", optimize_indentation(data, 4), after: sentinel, verbose: false
    else
      Array(options[:env]).each do |env|
        inject_into_file "config/environments/#{env}.rb", optimize_indentation(data, 2), after: env_file_sentinel, verbose: false
      end
    end
  end
end

#gem(*args) ⇒ Object

Adds a gem declaration to the Gemfile for the specified gem.

gem "rspec", group: :test
gem "technoweenie-restful-authentication", lib: "restful-authentication", source: "http://gems.github.com/"
gem "rails", "3.0", git: "https://github.com/rails/rails"
gem "RedCloth", ">= 4.1.0", "< 4.2.0"
gem "rspec", comment: "Put this comment above the gem declaration"

Note that this method only adds the gem to the Gemfile; it does not install the gem.

Options

:version

The version constraints for the gem, specified as a string or an array of strings:

gem "my_gem", version: "~> 1.1"
gem "my_gem", version: [">= 1.1", "< 2.0"]

Alternatively, can be specified as one or more arguments following the gem name:

gem "my_gem", ">= 1.1", "< 2.0"
:comment

Outputs a comment above the gem declaration in the Gemfile.

gem "my_gem", comment: "First line.\nSecond line."

Outputs:

# First line.
# Second line.
gem "my_gem"
:group

The gem group in the Gemfile that the gem belongs to.

:git

The URL of the git repository for the gem.

Any additional options passed to this method will be appended to the gem declaration in the Gemfile. For example:

gem "my_gem", comment: "Edge my_gem", git: "https://example.com/my_gem.git", branch: "master"

Outputs:

# Edge my_gem
gem "my_gem", git: "https://example.com/my_gem.git", branch: "master"



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# File 'railties/lib/rails/generators/actions.rb', line 67

def gem(*args)
  options = args.extract_options!
  name, *versions = args

  # Set the message to be shown in logs. Uses the git repo if one is given,
  # otherwise use name (version).
  parts, message = [ quote(name) ], name.dup

  # Output a comment above the gem declaration.
  comment = options.delete(:comment)

  if versions = versions.any? ? versions : options.delete(:version)
    _versions = Array(versions)
    _versions.each do |version|
      parts << quote(version)
    end
    message << " (#{_versions.join(", ")})"
  end
  message = options[:git] if options[:git]

  log :gemfile, message

  parts << quote(options) unless options.empty?

  in_root do
    str = []
    if comment
      comment.each_line do |comment_line|
        str << indentation
        str << "# #{comment_line}"
      end
      str << "\n"
    end
    str << indentation
    str << "gem #{parts.join(", ")}"
    append_file_with_newline "Gemfile", str.join, verbose: false
  end
end

#gem_group(*names, &block) ⇒ Object

Wraps gem entries inside a group.

gem_group :development, :test do
  gem "rspec-rails"
end



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# File 'railties/lib/rails/generators/actions.rb', line 111

def gem_group(*names, &block)
  options = names.extract_options!
  str = names.map(&:inspect)
  str << quote(options) unless options.empty?
  str = str.join(", ")
  log :gemfile, "group #{str}"

  in_root do
    append_file_with_newline "Gemfile", "\ngroup #{str} do", force: true
    with_indentation(&block)
    append_file_with_newline "Gemfile", "end", force: true
  end
end

#generate(what, *args) ⇒ Object

Runs another generator.

generate "scaffold", "Post title:string body:text"
generate "scaffold", "Post", "title:string", "body:text"

The first argument is the generator name, and the remaining arguments are joined together and passed to the generator.



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# File 'railties/lib/rails/generators/actions.rb', line 332

def generate(what, *args)
  log :generate, what

  options = args.extract_options!
  options[:abort_on_failure] = !options[:inline]

  rails_command "generate #{what} #{args.join(" ")}", options
end

#git(commands = {}) ⇒ Object

Runs one or more git commands.

git :init
# => runs `git init`

git add: "this.file that.rb"
# => runs `git add this.file that.rb`

git commit: "-m 'First commit'"
# => runs `git commit -m 'First commit'`

git add: "good.rb", rm: "bad.cxx"
# => runs `git add good.rb; git rm bad.cxx`



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# File 'railties/lib/rails/generators/actions.rb', line 237

def git(commands = {})
  if commands.is_a?(Symbol)
    run "git #{commands}"
  else
    commands.each do |cmd, options|
      run "git #{cmd} #{options}"
    end
  end
end

#github(repo, options = {}, &block) ⇒ Object 



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# File 'railties/lib/rails/generators/actions.rb', line 125

def github(repo, options = {}, &block)
  str = [quote(repo)]
  str << quote(options) unless options.empty?
  str = str.join(", ")
  log :github, "github #{str}"

  in_root do
    if @indentation.zero?
      append_file_with_newline "Gemfile", "\ngithub #{str} do", force: true
    else
      append_file_with_newline "Gemfile", "#{indentation}github #{str} do", force: true
    end
    with_indentation(&block)
    append_file_with_newline "Gemfile", "#{indentation}end", force: true
  end
end

#initialize ⇒ Object

:nodoc:



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# File 'railties/lib/rails/generators/actions.rb', line 10

def initialize(*) # :nodoc:
  super
  @indentation = 0
end

#initializer(filename, data = nil) ⇒ Object

Creates an initializer file in config/initializers/. The code can be specified as an argument or as the return value of the block.

initializer "api.rb", <<~RUBY
  API_KEY = "123456"
RUBY

initializer "api.rb" do
  %(API_KEY = "123456")
end



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# File 'railties/lib/rails/generators/actions.rb', line 319

def initializer(filename, data = nil)
  log :initializer, filename
  data ||= yield if block_given?
  create_file("config/initializers/#{filename}", optimize_indentation(data), verbose: false)
end

#lib(filename, data = nil) ⇒ Object

Creates a file in lib/. The contents can be specified as an argument or as the return value of the block.

lib "foreign.rb", <<~RUBY
  # Foreign code is fun
RUBY

lib "foreign.rb" do
  "# Foreign code is fun"
end



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# File 'railties/lib/rails/generators/actions.rb', line 275

def lib(filename, data = nil)
  log :lib, filename
  data ||= yield if block_given?
  create_file("lib/#{filename}", optimize_indentation(data), verbose: false)
end

#rails_command(command, options = {}) ⇒ Object

Runs the specified Rails command.

rails_command "db:migrate"
rails_command "db:migrate", env: "production"
rails_command "db:migrate", abort_on_failure: true
rails_command "stats", capture: true
rails_command "gems:install", sudo: true

Options

:env

The Rails environment in which to run the command. Defaults to ENV["RAILS_ENV"] || "development".

:abort_on_failure

Whether to halt the generator if the command exits with a non-success exit status.

:capture

Whether to capture and return the output of the command.

:sudo

Whether to run the command using sudo.



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# File 'railties/lib/rails/generators/actions.rb', line 391

def rails_command(command, options = {})
  if options[:inline]
    log :rails, command
    command, *args = Shellwords.split(command)
    in_root do
      silence_warnings do
        ::Rails::Command.invoke(command, args, **options)
      end
    end
  else
    execute_command :rails, command, options
  end
end

#rake(command, options = {}) ⇒ Object

Runs the specified Rake task.

rake "db:migrate"
rake "db:migrate", env: "production"
rake "db:migrate", abort_on_failure: true
rake "stats", capture: true
rake "gems:install", sudo: true

Options

:env

The Rails environment in which to run the task. Defaults to ENV["RAILS_ENV"] || "development".

:abort_on_failure

Whether to halt the generator if the task exits with a non-success exit status.

:capture

Whether to capture and return the output of the task.

:sudo

Whether to run the task using sudo.



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# File 'railties/lib/rails/generators/actions.rb', line 364

def rake(command, options = {})
  execute_command :rake, command, options
end

#rakefile(filename, data = nil) ⇒ Object

Creates a Rake tasks file in lib/tasks/. The code can be specified as an argument or as the return value of the block.

rakefile "bootstrap.rake", <<~RUBY
  task :bootstrap do
    puts "Boots! Boots! Boots!"
  end
RUBY

rakefile "bootstrap.rake" do
  project = ask("What is the UNIX name of your project?")

  <<~RUBY
    namespace :#{project} do
      task :bootstrap do
        puts "Boots! Boots! Boots!"
      end
    end
  RUBY
end



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# File 'railties/lib/rails/generators/actions.rb', line 302

def rakefile(filename, data = nil)
  log :rakefile, filename
  data ||= yield if block_given?
  create_file("lib/tasks/#{filename}", optimize_indentation(data), verbose: false)
end

#readme(path) ⇒ Object

Reads the given file at the source root and prints it in the console.

readme "README"



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# File 'railties/lib/rails/generators/actions.rb', line 442

def readme(path)
  log File.read(find_in_source_paths(path))
end

#route(routing_code, namespace: nil) ⇒ Object

Make an entry in Rails routing file config/routes.rb

route "root 'welcome#index'"
route "root 'admin#index'", namespace: :admin



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# File 'railties/lib/rails/generators/actions.rb', line 409

def route(routing_code, namespace: nil)
  namespace = Array(namespace)
  namespace_pattern = route_namespace_pattern(namespace)
  routing_code = namespace.reverse.reduce(routing_code) do |code, name|
    "namespace :#{name} do\n#{rebase_indentation(code, 2)}end"
  end

  log :route, routing_code

  in_root do
    if namespace_match = match_file("config/routes.rb", namespace_pattern)
      base_indent, *, existing_block_indent = namespace_match.captures.compact.map(&:length)
      existing_line_pattern = /^[ ]{,#{existing_block_indent}}\S.+\n?/
      routing_code = rebase_indentation(routing_code, base_indent + 2).gsub(existing_line_pattern, "")
      namespace_pattern = /#{Regexp.escape namespace_match.to_s}/
    end

    inject_into_file "config/routes.rb", routing_code, after: namespace_pattern, verbose: false, force: false

    if behavior == :revoke && namespace.any? && namespace_match
      empty_block_pattern = /(#{namespace_pattern})((?:\s*end\n){1,#{namespace.size}})/
      gsub_file "config/routes.rb", empty_block_pattern, verbose: false, force: true do |matched|
        beginning, ending = empty_block_pattern.match(matched).captures
        ending.sub!(/\A\s*end\n/, "") while !ending.empty? && beginning.sub!(/^[ ]*namespace .+ do\n\s*\z/, "")
        beginning + ending
      end
    end
  end
end

#vendor(filename, data = nil) ⇒ Object

Creates a file in vendor/. The contents can be specified as an argument or as the return value of the block.

vendor "foreign.rb", <<~RUBY
  # Foreign code is fun
RUBY

vendor "foreign.rb" do
  "# Foreign code is fun"
end



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# File 'railties/lib/rails/generators/actions.rb', line 258

def vendor(filename, data = nil)
  log :vendor, filename
  data ||= yield if block_given?
  create_file("vendor/#{filename}", optimize_indentation(data), verbose: false)
end