Class: Gem::RequestSet::GemDependencyAPI (Ruby 2.3.4)

In Files

  • rubygems/request_set/gem_dependency_api.rb

Class/Module Index [+]



frozen_string_literal: true

A semi-compatible DSL for the Bundler Gemfile and Isolate gem dependencies files.

To work with both the Bundler Gemfile and Isolate formats this implementation takes some liberties to allow compatibility with each, most notably in source.

A basic gem dependencies file will look like the following:

source ''

gem 'rails', '3.2.14a
gem 'devise', '~> 2.1', '>= 2.1.3'
gem 'cancan'
gem 'airbrake'
gem 'pg'

RubyGems recommends saving this as gem.deps.rb over Gemfile or Isolate.

To install the gems in this Gemfile use `gem install -g` to install it and create a lockfile. The lockfile will ensure that when you make changes to your gem dependencies file a minimum amount of change is made to the dependencies of your gems.

RubyGems can activate all the gems in your dependencies file at startup using the RUBYGEMS_GEMDEPS environment variable or through Gem.use_gemdeps. See Gem.use_gemdeps for details and warnings.

See `gem help install` and `gem help gem_dependencies` for further details.



The gems required by gem statements in the gem.deps.rb file


A Hash containing gem names and files to require from those gems.

Public Class Methods

new(set, path)

Creates a new GemDependencyAPI that will add dependencies to the Gem::RequestSet set based on the dependency API description in path.

               # File rubygems/request_set/gem_dependency_api.rb, line 194
def initialize set, path
  @set = set
  @path = path

  @current_groups     = nil
  @current_platforms  = nil
  @current_repository = nil
  @dependencies       = {}
  @default_sources    = true
  @git_set            = @set.git_set
  @git_sources        = {}
  @installing         = false
  @requires           = { |h, name| h[name] = [] }
  @vendor_set         = @set.vendor_set
  @source_set         = @set.source_set
  @gem_sources        = {}
  @without_groups     = []

  git_source :github do |repo_name|
    repo_name = "#{repo_name}/#{repo_name}" unless repo_name.include? "/"


  git_source :bitbucket do |repo_name|
    repo_name = "#{repo_name}/#{repo_name}" unless repo_name.include? "/"

    user, = repo_name.split "/", 2


Public Instance Methods

git_source(name, &callback)

Defines a custom git source that uses name to expand git repositories for use in gems built from git repositories. You must provide a block that accepts a git repository name for expansion.

               # File rubygems/request_set/gem_dependency_api.rb, line 604
def git_source name, &callback
  @git_sources[name] = callback

Loads the gem dependency file and returns self.

               # File rubygems/request_set/gem_dependency_api.rb, line 279
def load
  instance_eval, @path, 1


Gem Dependencies DSL ↑ top

Public Instance Methods

gem(name, *requirements)
gem(name, *requirements, options)

Specifies a gem dependency with the given name and requirements. You may also supply options following the requirements

options include:


RubyGems does not provide any autorequire features so requires in a gem dependencies file are recorded but ignored.

In bundler the require: option overrides the file to require during Bundler.require. By default the name of the dependency is required in Bundler. A single file or an Array of files may be given.

To disable requiring any file give false:

gem 'rake', require: false

Place the dependencies in the given dependency group. A single group or an Array of groups may be given.

See also group


Only install the dependency on the given platform. A single platform or an Array of platforms may be given.

See platform for a list of platforms available.


Install this dependency from an unpacked gem in the given directory.

gem 'modified_gem', path: 'vendor/modified_gem'

Install this dependency from a git repository:

gem 'private_gem', git:'

Install this dependency from the gist ID:

gem 'bang', gist: '1232884'

Install this dependency from a github git repository:

gem 'private_gem', github: 'my_company/private_gem'

Set to true to include submodules when fetching the git repository for git:, gist: and github: dependencies.


Use the given commit name or SHA for git:, gist: and github: dependencies.


Use the given branch for git:, gist: and github: dependencies.


Use the given tag for git:, gist: and github: dependencies.

               # File rubygems/request_set/gem_dependency_api.rb, line 356
  def gem name, *requirements
    options = requirements.pop if requirements.last.kind_of?(Hash)
    options ||= {}

    options[:git] = @current_repository if @current_repository

    source_set = false

    source_set ||= gem_path       name, options
    source_set ||= gem_git        name, options
    source_set ||= gem_git_source name, options
    source_set ||= gem_source     name, options

    duplicate = @dependencies.include? name

    @dependencies[name] =
      if requirements.empty? and not source_set then
      elsif source_set then
        Gem::Requirement.create requirements

    return unless gem_platforms options

    groups = gem_group name, options

    return unless (groups & @without_groups).empty?

    pin_gem_source name, :default unless source_set

    gem_requires name, options

    if duplicate then
      warn <<-WARNING
Gem dependencies file #{@path} requires #{name} more than once.

    @set.gem name, *requirements
gemspec(options = {})

Loads dependencies from a gemspec file.

options include:


The name portion of the gemspec file. Defaults to searching for any gemspec file in the current directory.

gemspec name: 'my_gem'

The path the gemspec lives in. Defaults to the current directory:

gemspec 'my_gem', path: 'gemspecs', name: 'my_gem'

The group to add development dependencies to. By default this is :development. Only one group may be specified.

               # File rubygems/request_set/gem_dependency_api.rb, line 637
def gemspec options = {}
  name              = options.delete(:name) || '{,*}'
  path              = options.delete(:path) || '.'
  development_group = options.delete(:development_group) || :development

  spec = find_gemspec name, path

  groups = gem_group, {}

  self_dep =, spec.version

  add_dependencies groups, [self_dep]
  add_dependencies groups, spec.runtime_dependencies

  @dependencies[] = Gem::Requirement.source_set

  spec.dependencies.each do |dep|
    @dependencies[] = dep.requirement

  groups << development_group

  add_dependencies groups, spec.development_dependencies

  @vendor_set.add_vendor_gem, path
  gem_requires, options

Block form for specifying gems from a git repository.

git '' do
  gem 'activesupport'
  gem 'activerecord'
               # File rubygems/request_set/gem_dependency_api.rb, line 590
def git repository
  @current_repository = repository


  @current_repository = nil

Block form for placing a dependency in the given groups.

group :development do
  gem 'debugger'

group :development, :test do
  gem 'minitest'

Groups can be excluded at install time using `gem install -g –without development`. See `gem help install` and `gem help gem_dependencies` for further details.

               # File rubygems/request_set/gem_dependency_api.rb, line 682
def group *groups
  @current_groups = groups


  @current_groups = nil

Block form for restricting gems to a set of platforms.

The gem dependencies platform is different from Gem::Platform. A platform gem.deps.rb platform matches on the ruby engine, the ruby version and whether or not windows is allowed.

:ruby, :ruby_XY

Matches non-windows, non-jruby implementations where X and Y can be used to match releases in the 1.8, 1.9, 2.0 or 2.1 series.

:mri, :mri_XY

Matches non-windows C Ruby (Matz Ruby) or only the 1.8, 1.9, 2.0 or 2.1 series.

:mingw, :mingw_XY

Matches 32 bit C Ruby on MinGW or only the 1.8, 1.9, 2.0 or 2.1 series.

:x64_mingw, :x64_mingw_XY

Matches 64 bit C Ruby on MinGW or only the 1.8, 1.9, 2.0 or 2.1 series.

:mswin, :mswin_XY

Matches 32 bit C Ruby on Microsoft Windows or only the 1.8, 1.9, 2.0 or 2.1 series.

:mswin64, :mswin64_XY

Matches 64 bit C Ruby on Microsoft Windows or only the 1.8, 1.9, 2.0 or 2.1 series.

:jruby, :jruby_XY

Matches JRuby or JRuby in 1.8 or 1.9 mode.


Matches Maglev


Matches non-windows Rubinius

NOTE: There is inconsistency in what environment a platform matches. You may need to read the source to know the exact details.

               # File rubygems/request_set/gem_dependency_api.rb, line 757
def platform *platforms
  @current_platforms = platforms


  @current_platforms = nil
Also aliased as: platforms

Block form for restricting gems to a particular set of platforms. See platform.

Alias for: platform
ruby(version, options = {})

Restricts this gem dependencies file to the given ruby version.

You may also provide engine: and engine_version: options to restrict this gem dependencies file to a particular ruby engine and its engine version. This matching is performed by using the RUBY_ENGINE and engine_specific VERSION constants. (For JRuby, JRUBY_VERSION).

               # File rubygems/request_set/gem_dependency_api.rb, line 784
def ruby version, options = {}
  engine         = options[:engine]
  engine_version = options[:engine_version]

  raise ArgumentError,
        'you must specify engine_version along with the ruby engine' if
          engine and not engine_version

  return true if @installing

  unless RUBY_VERSION == version then
    message = "Your Ruby version is #{RUBY_VERSION}, " +
              "but your #{gem_deps_file} requires #{version}"

    raise Gem::RubyVersionMismatch, message

  if engine and engine != Gem.ruby_engine then
    message = "Your ruby engine is #{Gem.ruby_engine}, " +
              "but your #{gem_deps_file} requires #{engine}"

    raise Gem::RubyVersionMismatch, message

  if engine_version then
    my_engine_version = Object.const_get "#{Gem.ruby_engine.upcase}_VERSION"

    if engine_version != my_engine_version then
      message =
        "Your ruby engine version is #{Gem.ruby_engine} #{my_engine_version}, " +
        "but your #{gem_deps_file} requires #{engine} #{engine_version}"

      raise Gem::RubyVersionMismatch, message

  return true

Sets url as a source for gems for this dependency API. RubyGems uses the default configured sources if no source was given. If a source is set only that source is used.

This method differs in behavior from Bundler:

  • The :gemcutter, # :rubygems and :rubyforge sources are not supported as they are deprecated in bundler.

  • The prepend: option is not supported. If you wish to order sources then list them in your preferred order.

               # File rubygems/request_set/gem_dependency_api.rb, line 837
def source url
  Gem.sources.clear if @default_sources

  @default_sources = false

  Gem.sources << url