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Class: Gem::DependencyInstaller

Relationships & Source Files
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, Deprecate
Instance Chain:
Inherits: Object
Defined in: lib/rubygems/dependency_installer.rb

Overview

Installs a gem along with all its dependencies from local and remote gems.

Constant Summary

  • DEFAULT_OPTIONS = Internal use only
    # File 'lib/rubygems/dependency_installer.rb', line 19
    { # :nodoc:
      :env_shebang => false,
      :document => %w[ri],
      :domain => :both, # HACK dup
      :force => false,
      :format_executable => false, # HACK dup
      :ignore_dependencies => false,
      :prerelease => false,
      :security_policy => nil, # HACK NoSecurity requires OpenSSL. AlmostNo? Low?
      :wrappers => true,
      :build_args => nil,
      :build_docs_in_background => false,
      :install_as_default => false,
    }.freeze

Class Method Summary

Deprecate - Extended

deprecate

Simple deprecation method that deprecates name by wrapping it up in a dummy method.

rubygems_deprecate

Simple deprecation method that deprecates name by wrapping it up in a dummy method.

rubygems_deprecate_command

Deprecation method to deprecate Rubygems commands.

skip_during

Temporarily turn off warnings.

Instance Attribute Summary

DefaultUserInteraction - Included

Instance Method Summary

UserInteraction - Included

#alert

Displays an alert statement.

#alert_error

Displays an error statement to the error output location.

#alert_warning

Displays a warning statement to the warning output location.

#ask

Asks a question and returns the answer.

#ask_for_password

Asks for a password with a prompt

#ask_yes_no

Asks a yes or no question.

#choose_from_list

Asks the user to answer question with an answer from the given list.

#say

Displays the given statement on the standard output (or equivalent).

#terminate_interaction

Terminates the RubyGems process with the given exit_code

#verbose

Calls say with msg or the results of the block if really_verbose is true.

DefaultUserInteraction - Included

Text - Included

#clean_text

Remove any non-printable characters and make the text suitable for printing.

#format_text

Wraps text to wrap characters and optionally indents by indent characters.

#levenshtein_distance

Returns a value representing the “cost” of transforming str1 into str2 Vendored version of DidYouMean::Levenshtein.distance from the ruby/did_you_mean gem @ 1.4.0 github.com/ruby/did_you_mean/blob/2ddf39b874808685965dbc47d344cf6c7651807c/lib/did_you_mean/levenshtein.rb#L7-L37.

#truncate_text, #min3

Constructor Details

.new(options = {}) ⇒ DependencyInstaller

Creates a new installer instance.

Options are:

:cache_dir

Alternate repository path to store .gem files in.

:domain

:local, :remote, or :both. :local only searches gems in the current directory. :remote searches only gems in Gem::sources. :both searches both.

:env_shebang

See Installer.new.

:force

See Installer#install.

:format_executable

See Gem::Installer#initialize.

:ignore_dependencies

Don’t install any dependencies.

:install_dir

See Installer#install.

:prerelease

Allow prerelease versions. See #install.

:security_policy

See Installer.new and Security.

:user_install

See Installer.new

:wrappers

See Installer.new

:build_args

See Installer.new

[ GitHub ]

  
# File 'lib/rubygems/dependency_installer.rb', line 68

def initialize(options = {})
  @only_install_dir = !!options[:install_dir]
  @install_dir = options[:install_dir] || Gem.dir
  @build_root = options[:build_root]

  options = DEFAULT_OPTIONS.merge options

  @bin_dir             = options[:bin_dir]
  @dev_shallow         = options[:dev_shallow]
  @development         = options[:development]
  @document            = options[:document]
  @domain              = options[:domain]
  @env_shebang         = options[:env_shebang]
  @force               = options[:force]
  @format_executable   = options[:format_executable]
  @ignore_dependencies = options[:ignore_dependencies]
  @prerelease          = options[:prerelease]
  @security_policy     = options[:security_policy]
  @user_install        = options[:user_install]
  @wrappers            = options[:wrappers]
  @build_args          = options[:build_args]
  @build_docs_in_background = options[:build_docs_in_background]
  @install_as_default = options[:install_as_default]
  @dir_mode = options[:dir_mode]
  @data_mode = options[:data_mode]
  @prog_mode = options[:prog_mode]

  # Indicates that we should not try to update any deps unless
  # we absolutely must.
  @minimal_deps = options[:minimal_deps]

  @available      = nil
  @installed_gems = []
  @toplevel_specs = nil

  @cache_dir = options[:cache_dir] || @install_dir

  @errors = []
end

Instance Attribute Details

#consider_local?Boolean (readonly)

Indicated, based on the requested domain, if local gems should be considered.

[ GitHub ]

  
# File 'lib/rubygems/dependency_installer.rb', line 112

def consider_local?
  @domain == :both || @domain == :local
end

#consider_remote?Boolean (readonly)

Indicated, based on the requested domain, if remote gems should be considered.

[ GitHub ]

  
# File 'lib/rubygems/dependency_installer.rb', line 120

def consider_remote?
  @domain == :both || @domain == :remote
end

#document (readonly)

Documentation types. For use by the Gem.done_installing hook

[ GitHub ]

  
# File 'lib/rubygems/dependency_installer.rb', line 37

attr_reader :document

#errors (readonly)

Errors from SpecFetcher while searching for remote specifications

[ GitHub ]

  
# File 'lib/rubygems/dependency_installer.rb', line 42

attr_reader :errors

#installed_gems (readonly)

List of gems installed by #install in alphabetic order

[ GitHub ]

  
# File 'lib/rubygems/dependency_installer.rb', line 47

attr_reader :installed_gems

Instance Method Details

#find_gems_with_sources(dep, best_only = false)

This method is for internal use only.

Returns a list of pairs of gemspecs and source_uris that match Dependency dep from both local (Dir.pwd) and remote (Gem.sources) sources. Gems are sorted with newer gems preferred over older gems, and local gems preferred over remote gems.

[ GitHub ]

  
# File 'lib/rubygems/dependency_installer.rb', line 130

def find_gems_with_sources(dep, best_only=false) # :nodoc:
  set = Gem::AvailableSet.new

  if consider_local?
    sl = Gem::Source::Local.new

    if spec = sl.find_gem(dep.name)
      if dep.matches_spec? spec
        set.add spec, sl
      end
    end
  end

  if consider_remote?
    begin
      # This is pulled from #spec_for_dependency to allow
      # us to filter tuples before fetching specs.
      tuples, errors = Gem::SpecFetcher.fetcher.search_for_dependency dep

      if best_only && !tuples.empty?
        tuples.sort! do |a,b|
          if b[0].version == a[0].version
            if b[0].platform != Gem::Platform::RUBY
              1
            else
              -1
            end
          else
            b[0].version <=> a[0].version
          end
        end
        tuples = [tuples.first]
      end

      specs = []
      tuples.each do |tup, source|
        begin
          spec = source.fetch_spec(tup)
        rescue Gem::RemoteFetcher::FetchError => e
          errors << Gem::SourceFetchProblem.new(source, e)
        else
          specs << [spec, source]
        end
      end

      if @errors
        @errors += errors
      else
        @errors = errors
      end

      set << specs

    rescue Gem::RemoteFetcher::FetchError => e
      # FIX if there is a problem talking to the network, we either need to always tell
      # the user (no really_verbose) or fail hard, not silently tell them that we just
      # couldn't find their requested gem.
      verbose do
        "Error fetching remote data:\t\t#{e.message}\n" \
          "Falling back to local-only install"
      end
      @domain = :local
    end
  end

  set
end

#in_background(what)

This method is for internal use only.
[ GitHub ]

  
# File 'lib/rubygems/dependency_installer.rb', line 199

def in_background(what) # :nodoc:
  fork_happened = false
  if @build_docs_in_background && Process.respond_to?(:fork)
    begin
      Process.fork do
        yield
      end
      fork_happened = true
      say "#{what} in a background process."
    rescue NotImplementedError
    end
  end
  yield unless fork_happened
end

#install(dep_or_name, version = Gem::Requirement.default)

Installs the gem dep_or_name and all its dependencies. Returns an Array of installed gem specifications.

If the :prerelease option is set and there is a prerelease for dep_or_name the prerelease version will be installed.

Unless explicitly specified as a prerelease dependency, prerelease gems that dep_or_name depend on will not be installed.

If c-1.a depends on b-1 and a-1.a and there is a gem b-1.a available then c-1.a, b-1 and a-1.a will be installed. b-1.a will need to be installed separately.

[ GitHub ]

  
# File 'lib/rubygems/dependency_installer.rb', line 228

def install(dep_or_name, version = Gem::Requirement.default)
  request_set = resolve_dependencies dep_or_name, version

  @installed_gems = []

  options = {
    :bin_dir => @bin_dir,
    :build_args => @build_args,
    :document => @document,
    :env_shebang => @env_shebang,
    :force => @force,
    :format_executable => @format_executable,
    :ignore_dependencies => @ignore_dependencies,
    :prerelease => @prerelease,
    :security_policy => @security_policy,
    :user_install => @user_install,
    :wrappers => @wrappers,
    :build_root => @build_root,
    :install_as_default => @install_as_default,
    :dir_mode => @dir_mode,
    :data_mode => @data_mode,
    :prog_mode => @prog_mode,
  }
  options[:install_dir] = @install_dir if @only_install_dir

  request_set.install options do |_, installer|
    @installed_gems << installer.spec if installer
  end

  @installed_gems.sort!

  # Since this is currently only called for docs, we can be lazy and just say
  # it's documentation. Ideally the hook adder could decide whether to be in
  # the background or not, and what to call it.
  in_background "Installing documentation" do
    Gem.done_installing_hooks.each do |hook|
      hook.call self, @installed_gems
    end
  end unless Gem.done_installing_hooks.empty?

  @installed_gems
end

#install_development_deps

This method is for internal use only.
[ GitHub ]

  
# File 'lib/rubygems/dependency_installer.rb', line 271

def install_development_deps # :nodoc:
  if @development && @dev_shallow
    :shallow
  elsif @development
    :all
  else
    :none
  end
end

#resolve_dependencies(dep_or_name, version)

This method is for internal use only.
[ GitHub ]

  
# File 'lib/rubygems/dependency_installer.rb', line 281

def resolve_dependencies(dep_or_name, version) # :nodoc:
  request_set = Gem::RequestSet.new
  request_set.development         = @development
  request_set.development_shallow = @dev_shallow
  request_set.soft_missing = @force
  request_set.prerelease = @prerelease

  installer_set = Gem::Resolver::InstallerSet.new @domain
  installer_set.ignore_installed = (@minimal_deps == false) || @only_install_dir
  installer_set.force = @force

  if consider_local?
    if dep_or_name =~ /\.gem$/ && File.file?(dep_or_name)
      src = Gem::Source::SpecificFile.new dep_or_name
      installer_set.add_local dep_or_name, src.spec, src
      version = src.spec.version if version == Gem::Requirement.default
    elsif dep_or_name =~ /\.gem$/
      Dir[dep_or_name].each do |name|
        begin
          src = Gem::Source::SpecificFile.new name
          installer_set.add_local dep_or_name, src.spec, src
        rescue Gem::Package::FormatError
        end
      end
      # else This is a dependency. InstallerSet handles this case
    end
  end

  dependency =
    if spec = installer_set.local?(dep_or_name)
      installer_set.remote = nil if spec.dependencies.none?
      Gem::Dependency.new spec.name, version
    elsif String === dep_or_name
      Gem::Dependency.new dep_or_name, version
    else
      dep_or_name
    end

  dependency.prerelease = @prerelease

  request_set.import [dependency]

  installer_set.add_always_install dependency

  request_set.always_install = installer_set.always_install
  request_set.remote = installer_set.consider_remote?

  if @ignore_dependencies
    installer_set.ignore_dependencies = true
    request_set.ignore_dependencies   = true
    request_set.soft_missing          = true
  end

  request_set.resolve installer_set

  @errors.concat request_set.errors

  request_set
end