class Gem::RequestSet::GemDependencyAPI

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 'https://rubygems.org'

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.

Attributes

dependencies[R]

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

requires[R]

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

Public Class Methods

new(set, path) click to toggle source

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

# File lib/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           = Hash.new { |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://github.com/#{repo_name}.git"
  end

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

    user, = repo_name.split "/", 2

    "https://#{user}@bitbucket.org/#{repo_name}.git"
  end
end

Public Instance Methods

git_source(name, &callback) click to toggle source

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 lib/rubygems/request_set/gem_dependency_api.rb, line 604
def git_source(name, &callback)
  @git_sources[name] = callback
end
load() click to toggle source

Loads the gem dependency file and returns self.

# File lib/rubygems/request_set/gem_dependency_api.rb, line 279
def load
  instance_eval File.read(@path).untaint, @path, 1

  self
end
pin_gem_source(name, type = :default, source = nil) click to toggle source

Pins the gem name to the given source. Adding a gem with the same name from a different source will raise an exception.

# File lib/rubygems/request_set/gem_dependency_api.rb, line 695
def pin_gem_source(name, type = :default, source = nil)
  source_description =
    case type
    when :default then '(default)'
    when :path    then "path: #{source}"
    when :git     then "git: #{source}"
    when :source  then "source: #{source}"
    else               '(unknown)'
    end

  raise ArgumentError,
    "duplicate source #{source_description} for gem #{name}" if
      @gem_sources.fetch(name, source) != source

  @gem_sources[name] = source
end

Gem Dependencies DSL

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Public Instance Methods

gem(name) click to toggle source
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:

require:

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
group:

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

See also group

platform:

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.

path:

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

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

Install this dependency from a git repository:

gem 'private_gem', git: git@my.company.example:private_gem.git'
gist:

Install this dependency from the gist ID:

gem 'bang', gist: '1232884'
github:

Install this dependency from a github git repository:

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

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

ref:

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

branch:

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

tag:

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

# File lib/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
        Gem::Requirement.default
      elsif source_set
        Gem::Requirement.source_set
      else
        Gem::Requirement.create requirements
      end

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

    @set.gem name, *requirements
  end

  ##
  # Handles the git: option from +options+ for gem +name+.
  #
  # Returns +true+ if the gist or git option was handled.

  def gem_git(name, options) # :nodoc:
    if gist = options.delete(:gist)
      options[:git] = "https://gist.github.com/#{gist}.git"
    end

    return unless repository = options.delete(:git)

    pin_gem_source name, :git, repository

    reference = gem_git_reference options

    submodules = options.delete :submodules

    @git_set.add_git_gem name, repository, reference, submodules

    true
  end

  ##
  # Handles the git options from +options+ for git gem.
  #
  # Returns reference for the git gem.

  def gem_git_reference(options) # :nodoc:
    ref    = options.delete :ref
    branch = options.delete :branch
    tag    = options.delete :tag

    reference = nil
    reference ||= ref
    reference ||= branch
    reference ||= tag
    reference ||= 'master'

    if ref && branch
      warn <<-WARNING
Gem dependencies file #{@path} includes git reference for both ref and branch but only ref is used.
      WARNING
    end
    if (ref||branch) && tag
      warn <<-WARNING
Gem dependencies file #{@path} includes git reference for both ref/branch and tag but only ref/branch is used.
      WARNING
    end

    reference
  end

  private :gem_git

  ##
  # Handles a git gem option from +options+ for gem +name+ for a git source
  # registered through git_source.
  #
  # Returns +true+ if the custom source option was handled.

  def gem_git_source(name, options) # :nodoc:
    return unless git_source = (@git_sources.keys & options.keys).last

    source_callback = @git_sources[git_source]
    source_param = options.delete git_source

    git_url = source_callback.call source_param

    options[:git] = git_url

    gem_git name, options

    true
  end

  private :gem_git_source

  ##
  # Handles the :group and :groups +options+ for the gem with the given
  # +name+.

  def gem_group(name, options) # :nodoc:
    g = options.delete :group
    all_groups  = g ? Array(g) : []

    groups = options.delete :groups
    all_groups |= groups if groups

    all_groups |= @current_groups if @current_groups

    all_groups
  end

  private :gem_group

  ##
  # Handles the path: option from +options+ for gem +name+.
  #
  # Returns +true+ if the path option was handled.

  def gem_path(name, options) # :nodoc:
    return unless directory = options.delete(:path)

    pin_gem_source name, :path, directory

    @vendor_set.add_vendor_gem name, directory

    true
  end

  private :gem_path

  ##
  # Handles the source: option from +options+ for gem +name+.
  #
  # Returns +true+ if the source option was handled.

  def gem_source(name, options) # :nodoc:
    return unless source = options.delete(:source)

    pin_gem_source name, :source, source

    @source_set.add_source_gem name, source

    true
  end

  private :gem_source

  ##
  # Handles the platforms: option from +options+.  Returns true if the
  # platform matches the current platform.

  def gem_platforms(options) # :nodoc:
    platform_names = Array(options.delete :platform)
    platform_names.concat Array(options.delete :platforms)
    platform_names.concat @current_platforms if @current_platforms

    return true if platform_names.empty?

    platform_names.any? do |platform_name|
      raise ArgumentError, "unknown platform #{platform_name.inspect}" unless
        platform = PLATFORM_MAP[platform_name]

      next false unless Gem::Platform.match platform

      if engines = ENGINE_MAP[platform_name]
        next false unless engines.include? Gem.ruby_engine
      end

      case WINDOWS[platform_name]
      when :only then
        next false unless Gem.win_platform?
      when :never then
        next false if Gem.win_platform?
      end

      VERSION_MAP[platform_name].satisfied_by? Gem.ruby_version
    end
  end

  private :gem_platforms

  ##
  # Records the require: option from +options+ and adds those files, or the
  # default file to the require list for +name+.

  def gem_requires(name, options) # :nodoc:
    if options.include? :require
      if requires = options.delete(:require)
        @requires[name].concat Array requires
      end
    else
      @requires[name] << name
    end
    raise ArgumentError, "Unhandled gem options #{options.inspect}" unless options.empty?
  end

  private :gem_requires

  ##
  # :category: Gem Dependencies DSL
  #
  # Block form for specifying gems from a git +repository+.
  #
  #   git 'https://github.com/rails/rails.git' do
  #     gem 'activesupport'
  #     gem 'activerecord'
  #   end

  def git(repository)
    @current_repository = repository

    yield

  ensure
    @current_repository = nil
  end

  ##
  # 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.

  def git_source(name, &callback)
    @git_sources[name] = callback
  end

  ##
  # Returns the basename of the file the dependencies were loaded from

  def gem_deps_file # :nodoc:
    File.basename @path
  end

  ##
  # :category: Gem Dependencies DSL
  #
  # Loads dependencies from a gemspec file.
  #
  # +options+ include:
  #
  # name: ::
  #   The name portion of the gemspec file.  Defaults to searching for any
  #   gemspec file in the current directory.
  #
  #     gemspec name: 'my_gem'
  #
  # path: ::
  #   The path the gemspec lives in.  Defaults to the current directory:
  #
  #     gemspec 'my_gem', path: 'gemspecs', name: 'my_gem'
  #
  # development_group: ::
  #   The group to add development dependencies to.  By default this is
  #   :development.  Only one group may be specified.

  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 spec.name, {}

    self_dep = Gem::Dependency.new spec.name, spec.version

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

    @dependencies[spec.name] = Gem::Requirement.source_set

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

    groups << development_group

    add_dependencies groups, spec.development_dependencies

    @vendor_set.add_vendor_gem spec.name, path
    gem_requires spec.name, options
  end

  ##
  # :category: Gem Dependencies DSL
  #
  # Block form for placing a dependency in the given +groups+.
  #
  #   group :development do
  #     gem 'debugger'
  #   end
  #
  #   group :development, :test do
  #     gem 'minitest'
  #   end
  #
  # 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.

  def group(*groups)
    @current_groups = groups

    yield

  ensure
    @current_groups = nil
  end

  ##
  # Pins the gem +name+ to the given +source+.  Adding a gem with the same
  # name from a different +source+ will raise an exception.

  def pin_gem_source(name, type = :default, source = nil)
    source_description =
      case type
      when :default then '(default)'
      when :path    then "path: #{source}"
      when :git     then "git: #{source}"
      when :source  then "source: #{source}"
      else               '(unknown)'
      end

    raise ArgumentError,
      "duplicate source #{source_description} for gem #{name}" if
        @gem_sources.fetch(name, source) != source

    @gem_sources[name] = source
  end

  private :pin_gem_source

  ##
  # :category: Gem Dependencies DSL
  #
  # 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.
  #
  # :maglev ::
  #   Matches Maglev
  #
  # :rbx ::
  #   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.

  def platform(*platforms)
    @current_platforms = platforms

    yield

  ensure
    @current_platforms = nil
  end

  ##
  # :category: Gem Dependencies DSL
  #
  # Block form for restricting gems to a particular set of platforms.  See
  # #platform.

  alias :platforms :platform

  ##
  # :category: Gem Dependencies DSL
  #
  # 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).

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

      raise Gem::RubyVersionMismatch, message
    end

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

      raise Gem::RubyVersionMismatch, message
    end

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

      if engine_version != my_engine_version
        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
      end
    end

    return true
  end

  ##
  # :category: Gem Dependencies DSL
  #
  # 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.

  def source(url)
    Gem.sources.clear if @default_sources

    @default_sources = false

    Gem.sources <<
gemspec(options = {}) click to toggle source

Loads dependencies from a gemspec file.

options include:

name:

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

gemspec name: 'my_gem'
path:

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

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

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

# File lib/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 spec.name, {}

  self_dep = Gem::Dependency.new spec.name, spec.version

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

  @dependencies[spec.name] = Gem::Requirement.source_set

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

  groups << development_group

  add_dependencies groups, spec.development_dependencies

  @vendor_set.add_vendor_gem spec.name, path
  gem_requires spec.name, options
end
git(repository) { || ... } click to toggle source

Block form for specifying gems from a git repository.

git 'https://github.com/rails/rails.git' do
  gem 'activesupport'
  gem 'activerecord'
end
# File lib/rubygems/request_set/gem_dependency_api.rb, line 590
def git(repository)
  @current_repository = repository

  yield

ensure
  @current_repository = nil
end
group(*groups) { || ... } click to toggle source

Block form for placing a dependency in the given groups.

group :development do
  gem 'debugger'
end

group :development, :test do
  gem 'minitest'
end

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 lib/rubygems/request_set/gem_dependency_api.rb, line 682
def group(*groups)
  @current_groups = groups

  yield

ensure
  @current_groups = nil
end
platform(*platforms) { || ... } click to toggle source

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.

:maglev

Matches Maglev

:rbx

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 lib/rubygems/request_set/gem_dependency_api.rb, line 757
def platform(*platforms)
  @current_platforms = platforms

  yield

ensure
  @current_platforms = nil
end
ruby(version, options = {}) click to toggle source

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

    raise Gem::RubyVersionMismatch, message
  end

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

    raise Gem::RubyVersionMismatch, message
  end

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

    if engine_version != my_engine_version
      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
    end
  end

  return true
end
source(url) click to toggle source

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 lib/rubygems/request_set/gem_dependency_api.rb, line 837
def source(url)
  Gem.sources.clear if @default_sources

  @default_sources = false

  Gem.sources << url
end