Module: Utils::GemSetup Private

Defined in:
utils/gem_setup.rb

Overview

This module is part of a private API. This module may only be used in the Homebrew/brew repository. Third parties should avoid using this module if possible, as it may be removed or changed without warning.

Helpers for loading and maintaining Homebrew's vendored gems.

Class Method Summary collapse

Class Method Details

.forget_user_gem_groups! ⇒ Object

This method is part of a private API. This method may only be used in the Homebrew/brew repository. Third parties should avoid using this method if possible, as it may be removed or changed without warning. 



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# File 'utils/gem_setup.rb', line 183

def self.forget_user_gem_groups!
  GEM_GROUPS_FILE.truncate(0) if GEM_GROUPS_FILE.exist?
  @user_gem_groups = []
end

.install_bundler_gems!(only_warn_on_failure: false, setup_path: true, groups: []) ⇒ Object

This method is part of a private API. This method may only be used in the Homebrew/brew repository. Third parties should avoid using this method if possible, as it may be removed or changed without warning. 



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# File 'utils/gem_setup.rb', line 197

def self.install_bundler_gems!(only_warn_on_failure: false, setup_path: true, groups: [])
  old_path = ENV.fetch("PATH", nil)
  old_gem_path = ENV.fetch("GEM_PATH", nil)
  old_gem_home = ENV.fetch("GEM_HOME", nil)
  old_gem_spec_cache = ENV.fetch("GEM_SPEC_CACHE", nil)
  old_bundle_gemfile = ENV.fetch("BUNDLE_GEMFILE", nil)
  old_bundle_with = ENV.fetch("BUNDLE_WITH", nil)
  old_bundle_frozen = ENV.fetch("BUNDLE_FROZEN", nil)

  invalid_groups = groups - valid_gem_groups
  raise ArgumentError, "Invalid gem groups: #{invalid_groups.join(", ")}" unless invalid_groups.empty?

  setup_gem_environment!
  # Tests should not modify the state of the repository.
  return if ENV["HOMEBREW_TESTS"]

  # Combine the passed groups with the ones stored in settings.
  groups |= (user_gem_groups & valid_gem_groups)
  groups.sort!

  if (homebrew_bundle_user_cache = ENV.fetch("HOMEBREW_BUNDLE_USER_CACHE", nil))
    ENV["BUNDLE_USER_CACHE"] = homebrew_bundle_user_cache
  end
  ENV["BUNDLE_GEMFILE"] = gemfile
  ENV["BUNDLE_WITH"] = groups.join(" ")
  ENV["BUNDLE_FROZEN"] = "true"

  if @bundle_installed_groups != groups
    bundle = File.join(find_in_path("bundle"), "bundle")
    bundle_check_output = `#{bundle} check 2>&1`
    bundle_check_failed = !$CHILD_STATUS.success?

    # for some reason sometimes the exit code lies so check the output too.
    bundle_install_required = bundle_check_failed || bundle_check_output.include?("Install missing gems")

    if user_vendor_version != VENDOR_VERSION
      # Check if the install is intact. This is useful if any gems are added to gitignore.
      # We intentionally map over everything and then call `any?` so that we remove the spec of each bad gem.
      specs = bundler_definition.resolve.materialize(bundler_definition.locked_dependencies)
      vendor_reinstall_required = specs.map do |spec|
        spec_file = "#{Gem.dir}/specifications/#{spec.full_name}.gemspec"
        next false unless File.exist?(spec_file)

        cache_file = "#{Gem.dir}/cache/#{spec.full_name}.gem"
        if File.exist?(cache_file)
          require "rubygems/package"
          package = Gem::Package.new(cache_file)

          package_install_intact = begin
            contents = package.contents

            # If the gem has contents, ensure we have every file installed it contains.
            contents&.all? do |gem_file|
              File.exist?("#{Gem.dir}/gems/#{spec.full_name}/#{gem_file}")
            end
          rescue Gem::Package::Error, Gem::Security::Exception
            # Malformed, assume broken
            File.unlink(cache_file)
            false
          end

          next false if package_install_intact
        end

        # Mark gem for reinstallation
        File.unlink(spec_file)
        true
      end.any?

      VENDOR_VERSION_FILE.dirname.mkpath
      VENDOR_VERSION_FILE.write(VENDOR_VERSION.to_s)

      bundle_install_required ||= vendor_reinstall_required
    end

    bundle_installed = if bundle_install_required
      Process.wait(fork do
        # Native build scripts fail if EUID != UID
        Process::UID.change_privilege(Process.euid) if Process.euid != Process.uid
        exec bundle, "install", out: :err
      end)
      if $CHILD_STATUS.success?
        true
      else
        message = <<~EOS
          failed to run `#{bundle} install`!
        EOS
        if only_warn_on_failure
          opoo_if_defined message
        else
          odie_if_defined message
        end
        false
      end
    elsif system bundle, "clean", out: :err # even if we have nothing to install, we may have removed gems
      true
    else
      message = <<~EOS
        failed to run `#{bundle} clean`!
      EOS
      if only_warn_on_failure
        opoo_if_defined message
      else
        odie_if_defined message
      end
      false
    end

    if bundle_installed
      # `bundle clean` can remove load paths just as `bundle install` can add them.
      Homebrew::Bootsnap.reset! if defined?(Homebrew::Bootsnap) # Gem setup can run before Bootsnap loads
      write_user_gem_groups(groups)
      @bundle_installed_groups = groups
    end
  end

  setup_gem_environment!
ensure
  unless setup_path
    # Reset the paths. We need to have at least temporarily changed them while invoking `bundle`.
    ENV["PATH"] = old_path
    ENV["GEM_PATH"] = old_gem_path
    ENV["GEM_HOME"] = old_gem_home
    ENV["GEM_SPEC_CACHE"] = old_gem_spec_cache
    ENV["BUNDLE_GEMFILE"] = old_bundle_gemfile
    ENV["BUNDLE_WITH"] = old_bundle_with
    ENV["BUNDLE_FROZEN"] = old_bundle_frozen
  end
end

.install_gem!(name, version: nil, setup_gem_environment: true) ⇒ Object

This method is part of a private API. This method may only be used in the Homebrew/brew repository. Third parties should avoid using this method if possible, as it may be removed or changed without warning. 



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# File 'utils/gem_setup.rb', line 117

def self.install_gem!(name, version: nil, setup_gem_environment: true)
  setup_gem_environment! if setup_gem_environment

  specs = Gem::Specification.find_all_by_name(name, version)

  if specs.empty?
    ohai_if_defined "Installing '#{name}' gem"
    # `document: []` is equivalent to --no-document
    # `build_args: []` stops ARGV being used as a default
    # `env_shebang: true` makes shebangs generic to allow switching between system and Portable Ruby
    specs = Gem.install name, version, document: [], build_args: [], env_shebang: true
  end

  specs += specs.flat_map(&:runtime_dependencies)
                .flat_map(&:to_specs)

  # Add the specs to the $LOAD_PATH.
  specs.each do |spec|
    spec.require_paths.each do |path|
      full_path = File.join(spec.full_gem_path, path)
      $LOAD_PATH.unshift full_path unless $LOAD_PATH.include?(full_path)
    end
  end
rescue Gem::UnsatisfiableDependencyError
  odie_if_defined "failed to install the '#{name}' gem."
end

.odie_if_defined(message) ⇒ Object

This method is part of a private API. This method may only be used in the Homebrew/brew repository. Third parties should avoid using this method if possible, as it may be removed or changed without warning. 



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# File 'utils/gem_setup.rb', line 72

def self.odie_if_defined(message)
  if Homebrew.respond_to?(:odie)
    Homebrew.odie message
  else
    $stderr.puts "Error: #{message}"
    exit 1
  end
end

.ohai_if_defined(message) ⇒ Object

This method is part of a private API. This method may only be used in the Homebrew/brew repository. Third parties should avoid using this method if possible, as it may be removed or changed without warning. 



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# File 'utils/gem_setup.rb', line 56

def self.ohai_if_defined(message)
  if Homebrew.respond_to?(:ohai)
    Homebrew.ohai message
  else
    $stderr.puts "==> #{message}"
  end
end

.opoo_if_defined(message) ⇒ Object

This method is part of a private API. This method may only be used in the Homebrew/brew repository. Third parties should avoid using this method if possible, as it may be removed or changed without warning. 



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# File 'utils/gem_setup.rb', line 64

def self.opoo_if_defined(message)
  if Homebrew.respond_to?(:opoo)
    Homebrew.opoo message
  else
    $stderr.puts "Warning: #{message}"
  end
end

.ruby_bindir ⇒ Object

This method is part of a private API. This method may only be used in the Homebrew/brew repository. Third parties should avoid using this method if possible, as it may be removed or changed without warning. 



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# File 'utils/gem_setup.rb', line 52

def self.ruby_bindir
  "#{RbConfig::CONFIG["prefix"]}/bin"
end

.setup_gem_environment!(setup_path: true) ⇒ Object

This method is part of a private API. This method may only be used in the Homebrew/brew repository. Third parties should avoid using this method if possible, as it may be removed or changed without warning. 



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# File 'utils/gem_setup.rb', line 81

def self.setup_gem_environment!(setup_path: true)
  require "rubygems"
  raise "RubyGems too old!" if Gem::Version.new(Gem::VERSION) < Gem::Version.new("2.2.0")

  ENV["BUNDLER_NO_OLD_RUBYGEMS_WARNING"] = "1"

  # Match where our bundler gems are.
  gem_home = "#{RUBY_BUNDLE_VENDOR_DIRECTORY}/#{RbConfig::CONFIG["ruby_version"]}"
  homebrew_cache = ENV.fetch("HOMEBREW_CACHE", nil)
  gem_cache = "#{homebrew_cache}/gem-spec-cache" if homebrew_cache

  Gem.paths = {
    "GEM_HOME"       => gem_home,
    "GEM_PATH"       => gem_home,
    "GEM_SPEC_CACHE" => gem_cache,
  }.compact

  # Set TMPDIR so Xcode's `make` doesn't fall back to `/var/tmp/`,
  # which may be not user-writable.
  ENV["TMPDIR"] = ENV.fetch("HOMEBREW_TEMP", nil)

  return unless setup_path

  # Add necessary Ruby and Gem binary directories to `PATH`.
  paths = ENV.fetch("PATH").split(":")
  paths.unshift(ruby_bindir) unless paths.include?(ruby_bindir)
  paths.unshift(Gem.bindir) unless paths.include?(Gem.bindir)
  ENV["PATH"] = paths.compact.join(":")

  # Set envs so the above binaries can be invoked.
  # We don't do this unless requested as some formulae may invoke system Ruby instead of ours.
  ENV["GEM_HOME"] = gem_home
  ENV["GEM_PATH"] = gem_home
  ENV["GEM_SPEC_CACHE"] = gem_cache if gem_cache
end

.valid_gem_groups ⇒ Object

This method is part of a private API. This method may only be used in the Homebrew/brew repository. Third parties should avoid using this method if possible, as it may be removed or changed without warning. 



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# File 'utils/gem_setup.rb', line 41

def self.valid_gem_groups
  require "bundler"

  Bundler.with_unbundled_env do
    ENV["BUNDLE_GEMFILE"] = gemfile
    groups = bundler_definition.groups
    groups.delete(:default)
    groups.map(&:to_s)
  end
end