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✏️ Editing: gem_dependency_api.rb

##
# 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.

class Gem::RequestSet::GemDependencyAPI

ENGINE_MAP = { # :nodoc:
    :jruby        => %w[jruby],
    :jruby_18     => %w[jruby],
    :jruby_19     => %w[jruby],
    :maglev       => %w[maglev],
    :mri          => %w[ruby],
    :mri_18       => %w[ruby],
    :mri_19       => %w[ruby],
    :mri_20       => %w[ruby],
    :mri_21       => %w[ruby],
    :rbx          => %w[rbx],
    :ruby         => %w[ruby rbx maglev],
    :ruby_18      => %w[ruby rbx maglev],
    :ruby_19      => %w[ruby rbx maglev],
    :ruby_20      => %w[ruby rbx maglev],
    :ruby_21      => %w[ruby rbx maglev],
  }

mswin     = Gem::Platform.new 'x86-mswin32'
  mswin64   = Gem::Platform.new 'x64-mswin64'
  x86_mingw = Gem::Platform.new 'x86-mingw32'
  x64_mingw = Gem::Platform.new 'x64-mingw32'

PLATFORM_MAP = { # :nodoc:
    :jruby        => Gem::Platform::RUBY,
    :jruby_18     => Gem::Platform::RUBY,
    :jruby_19     => Gem::Platform::RUBY,
    :maglev       => Gem::Platform::RUBY,
    :mingw        => x86_mingw,
    :mingw_18     => x86_mingw,
    :mingw_19     => x86_mingw,
    :mingw_20     => x86_mingw,
    :mingw_21     => x86_mingw,
    :mri          => Gem::Platform::RUBY,
    :mri_18       => Gem::Platform::RUBY,
    :mri_19       => Gem::Platform::RUBY,
    :mri_20       => Gem::Platform::RUBY,
    :mri_21       => Gem::Platform::RUBY,
    :mswin        => mswin,
    :mswin_18     => mswin,
    :mswin_19     => mswin,
    :mswin_20     => mswin,
    :mswin_21     => mswin,
    :mswin64      => mswin64,
    :mswin64_19   => mswin64,
    :mswin64_20   => mswin64,
    :mswin64_21   => mswin64,
    :rbx          => Gem::Platform::RUBY,
    :ruby         => Gem::Platform::RUBY,
    :ruby_18      => Gem::Platform::RUBY,
    :ruby_19      => Gem::Platform::RUBY,
    :ruby_20      => Gem::Platform::RUBY,
    :ruby_21      => Gem::Platform::RUBY,
    :x64_mingw    => x64_mingw,
    :x64_mingw_20 => x64_mingw,
    :x64_mingw_21 => x64_mingw
  }

gt_eq_0        = Gem::Requirement.new '>= 0'
  tilde_gt_1_8_0 = Gem::Requirement.new '~> 1.8.0'
  tilde_gt_1_9_0 = Gem::Requirement.new '~> 1.9.0'
  tilde_gt_2_0_0 = Gem::Requirement.new '~> 2.0.0'
  tilde_gt_2_1_0 = Gem::Requirement.new '~> 2.1.0'

VERSION_MAP = { # :nodoc:
    :jruby        => gt_eq_0,
    :jruby_18     => tilde_gt_1_8_0,
    :jruby_19     => tilde_gt_1_9_0,
    :maglev       => gt_eq_0,
    :mingw        => gt_eq_0,
    :mingw_18     => tilde_gt_1_8_0,
    :mingw_19     => tilde_gt_1_9_0,
    :mingw_20     => tilde_gt_2_0_0,
    :mingw_21     => tilde_gt_2_1_0,
    :mri          => gt_eq_0,
    :mri_18       => tilde_gt_1_8_0,
    :mri_19       => tilde_gt_1_9_0,
    :mri_20       => tilde_gt_2_0_0,
    :mri_21       => tilde_gt_2_1_0,
    :mswin        => gt_eq_0,
    :mswin_18     => tilde_gt_1_8_0,
    :mswin_19     => tilde_gt_1_9_0,
    :mswin_20     => tilde_gt_2_0_0,
    :mswin_21     => tilde_gt_2_1_0,
    :mswin64      => gt_eq_0,
    :mswin64_19   => tilde_gt_1_9_0,
    :mswin64_20   => tilde_gt_2_0_0,
    :mswin64_21   => tilde_gt_2_1_0,
    :rbx          => gt_eq_0,
    :ruby         => gt_eq_0,
    :ruby_18      => tilde_gt_1_8_0,
    :ruby_19      => tilde_gt_1_9_0,
    :ruby_20      => tilde_gt_2_0_0,
    :ruby_21      => tilde_gt_2_1_0,
    :x64_mingw    => gt_eq_0,
    :x64_mingw_20 => tilde_gt_2_0_0,
    :x64_mingw_21 => tilde_gt_2_1_0,
  }

WINDOWS = { # :nodoc:
    :mingw        => :only,
    :mingw_18     => :only,
    :mingw_19     => :only,
    :mingw_20     => :only,
    :mingw_21     => :only,
    :mri          => :never,
    :mri_18       => :never,
    :mri_19       => :never,
    :mri_20       => :never,
    :mri_21       => :never,
    :mswin        => :only,
    :mswin_18     => :only,
    :mswin_19     => :only,
    :mswin_20     => :only,
    :mswin_21     => :only,
    :mswin64      => :only,
    :mswin64_19   => :only,
    :mswin64_20   => :only,
    :mswin64_21   => :only,
    :rbx          => :never,
    :ruby         => :never,
    :ruby_18      => :never,
    :ruby_19      => :never,
    :ruby_20      => :never,
    :ruby_21      => :never,
    :x64_mingw    => :only,
    :x64_mingw_20 => :only,
    :x64_mingw_21 => :only,
  }

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

attr_reader :dependencies

##
  # A set of gems that are loaded via the +:git+ option to #gem

attr_reader :git_set # :nodoc:

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

attr_reader :requires # :nodoc:

##
  # A set of gems that are loaded via the +:path+ option to #gem

attr_reader :vendor_set # :nodoc:

##
  # The groups of gems to exclude from installation

attr_accessor :without_groups # :nodoc:

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

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
    @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

##
  # Adds +dependencies+ to the request set if any of the +groups+ are allowed.
  # This is used for gemspec dependencies.

def add_dependencies groups, dependencies # :nodoc:
    return unless (groups & @without_groups).empty?

dependencies.each do |dep|
      @set.gem dep.name, *dep.requirement
    end
  end

private :add_dependencies

##
  # Finds a gemspec with the given +name+ that lives at +path+.

def find_gemspec name, path # :nodoc:
    glob = File.join path, "#{name}.gemspec"

spec_files = Dir[glob]

case spec_files.length
    when 1 then
      spec_file = spec_files.first

spec = Gem::Specification.load spec_file

return spec if spec

raise ArgumentError, "invalid gemspec #{spec_file}"
    when 0 then
      raise ArgumentError, "no gemspecs found at #{Dir.pwd}"
    else
      raise ArgumentError,
        "found multiple gemspecs at #{Dir.pwd}, " +
        "use the name: option to specify the one you want"
    end
  end

##
  # Changes the behavior of gem dependency file loading to installing mode.
  # In installing mode certain restrictions are ignored such as ruby version
  # mismatch checks.

def installing= installing # :nodoc:
    @installing = installing
  end

##
  # Loads the gem dependency file and returns self.

def load
    instance_eval File.read(@path).untaint, @path, 1

self
  end

##
  # :category: Gem Dependencies DSL
  #
  # :call-seq:
  #   gem(name)
  #   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.

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

duplicate = @dependencies.include? name

@dependencies[name] =
      if requirements.empty? and not source_set then
        nil
      elsif source_set then
        '!'
      else
        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 then
      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 path option was handled.

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

return unless repository = options.delete(:git)

pin_gem_source name, :git, repository

reference = nil
    reference ||= options.delete :ref
    reference ||= options.delete :branch
    reference ||= options.delete :tag
    reference ||= 'master'

submodules = options.delete :submodules

@git_set.add_git_gem name, repository, reference, submodules

true
  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 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] then
        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 then
      if requires = options.delete(:require) then
        @requires[name].concat Array requires
      end
    else
      @requires[name] << name
    end
  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] = '!'

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

groups << development_group

add_dependencies groups, spec.development_dependencies

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

raise Gem::RubyVersionMismatch, message
    end

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
      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 << url
  end

# TODO: remove this typo name at RubyGems 3.0

Gem::RequestSet::GemDepedencyAPI = self # :nodoc:

end

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