class Bundler::Installer - bundler-1.15.4 Documentation

# class Bundler::Installer

### Attributes

ambiguous_gems[RW]
post_install_messages[R]

### Public Class Methods

install(root, definition, options = {}) click to toggle source

Begins the installation process for Bundler. For more information see the run method on this class.

    # File lib/bundler/installer.rb, line 20
    def self.install(root, definition, options = {})
      installer = new(root, definition)
      Plugin.hook("before-install-all", definition.dependencies)
      installer.run(options)
      installer
    end

new(root, definition) click to toggle source

    # File lib/bundler/installer.rb, line 27
    def initialize(root, definition)
      @root = root
      @definition = definition
      @post_install_messages = {}
    end

### Public Instance Methods

generate_bundler_executable_stubs(spec, options = {}) click to toggle source

    # File lib/bundler/installer.rb, line 85
    def generate_bundler_executable_stubs(spec, options = {})
      if options[:binstubs_cmd] && spec.executables.empty?
        options = {}
        spec.runtime_dependencies.each do |dep|
          bins = @definition.specs[dep].first.executables
          options[dep.name] = bins unless bins.empty?
        end
        if options.any?
          Bundler.ui.warn "#{spec.name} has no executables, but you may want "              "one from a gem it depends on."
          options.each {|name, bins| Bundler.ui.warn "  #{name} has: #{bins.join(", ")}" }
        else
          Bundler.ui.warn "There are no executables for the gem #{spec.name}."
        end
        return
      end

      # double-assignment to avoid warnings about variables that will be used by ERB
      bin_path = bin_path = Bundler.bin_path
      template = template = File.read(File.expand_path("../templates/Executable", __FILE__))
      relative_gemfile_path = relative_gemfile_path = Bundler.default_gemfile.relative_path_from(bin_path)
      ruby_command = ruby_command = Thor::Util.ruby_command

      exists = []
      spec.executables.each do |executable|
        next if executable == "bundle"

        binstub_path = "#{bin_path}/#{executable}"
        if File.exist?(binstub_path) && !options[:force]
          exists << executable
          next
        end

        File.open(binstub_path, "w", 0o777 & ~File.umask) do |f|
          f.puts ERB.new(template, nil, "-").result(binding)
        end
      end

      if options[:binstubs_cmd] && exists.any?
        case exists.size
        when 1
          Bundler.ui.warn "Skipped #{exists[0]} since it already exists."
        when 2
          Bundler.ui.warn "Skipped #{exists.join(" and ")} since they already exist."
        else
          items = exists[0...-1].empty? ? nil : exists[0...-1].join(", ")
          skipped = [items, exists[-1]].compact.join(" and ")
          Bundler.ui.warn "Skipped #{skipped} since they already exist."
        end
        Bundler.ui.warn "If you want to overwrite skipped stubs, use --force."
      end
    end

generate_standalone_bundler_executable_stubs(spec) click to toggle source

    # File lib/bundler/installer.rb, line 138
    def generate_standalone_bundler_executable_stubs(spec)
      # double-assignment to avoid warnings about variables that will be used by ERB
      bin_path = Bundler.bin_path
      standalone_path = standalone_path = Bundler.root.join(Bundler.settings[:path]).relative_path_from(bin_path)
      template = File.read(File.expand_path("../templates/Executable.standalone", __FILE__))
      ruby_command = ruby_command = Thor::Util.ruby_command

      spec.executables.each do |executable|
        next if executable == "bundle"
        executable_path = executable_path = Pathname(spec.full_gem_path).join(spec.bindir, executable).relative_path_from(bin_path)
        File.open "#{bin_path}/#{executable}", "w", 0o755 do |f|
          f.puts ERB.new(template, nil, "-").result(binding)
        end
      end
    end

run(options) click to toggle source

Runs the install procedures for a specific Gemfile.

Firstly, this method will check to see if Bundler.bundle_path exists and if not then will create it. This is usually the location of gems on the system, be it RVM or at a system path.

Secondly, it checks if Bundler has been configured to be “frozen” Frozen ensures that the Gemfile and the Gemfile.lock file are matching. This stops a situation where a developer may update the Gemfile but may not run `bundle install`, which leads to the Gemfile.lock file not being correctly updated. If this file is not correctly updated then any other developer running `bundle install` will potentially not install the correct gems.

Thirdly, Bundler checks if there are any dependencies specified in the Gemfile using Bundler::Environment#dependencies. If there are no dependencies specified then Bundler returns a warning message stating so and this method returns.

Fourthly, Bundler checks if the default lockfile (Gemfile.lock) exists, and if so then proceeds to set up a definition based on the default gemfile (Gemfile) and the default lock file (Gemfile.lock). However, this is not the case if the platform is different to that which is specified in Gemfile.lock, or if there are any missing specs for the gems.

Fifthly, Bundler resolves the dependencies either through a cache of gems or by remote. This then leads into the gems being installed, along with stubs for their executables, but only if the –binstubs option has been passed or Bundler.options has been set earlier.

Sixthly, a new Gemfile.lock is created from the installed gems to ensure that the next time that a user runs `bundle install` they will receive any updates from this process.

Finally: TODO add documentation for how the standalone process works.

    # File lib/bundler/installer.rb, line 64
    def run(options)
      create_bundle_path

      if Bundler.settings[:frozen]
        @definition.ensure_equivalent_gemfile_and_lockfile(options[:deployment])
      end

      if @definition.dependencies.empty?
        Bundler.ui.warn "The Gemfile specifies no dependencies"
        lock
        return
      end

      resolve_if_need(options)
      ensure_specs_are_compatible!
      install(options)

      lock unless Bundler.settings[:frozen]
      Standalone.new(options[:standalone], @definition).generate if options[:standalone]
    end

### Private Instance Methods

can_install_in_parallel?() click to toggle source

    # File lib/bundler/installer.rb, line 186
    def can_install_in_parallel?
      if Bundler.rubygems.provides?(">= 2.1.0")
        true
      else
        Bundler.ui.warn "Rubygems #{Gem::VERSION} is not threadsafe, so your "           "gems will be installed one at a time. Upgrade to Rubygems 2.1.0 "            "or higher to enable parallel gem installation."
        false
      end
    end

create_bundle_path() click to toggle source

    # File lib/bundler/installer.rb, line 204
    def create_bundle_path
      SharedHelpers.filesystem_access(Bundler.bundle_path.to_s) do |p|
        Bundler.mkdir_p(p)
      end unless Bundler.bundle_path.exist?
    rescue Errno::EEXIST
      raise PathError, "Could not install to path `#{Bundler.settings[:path]}` "          "because a file already exists at that path. Either remove or rename the file so the directory can be created."
    end

ensure_specs_are_compatible!() click to toggle source

    # File lib/bundler/installer.rb, line 168
    def ensure_specs_are_compatible!
      system_ruby = Bundler::RubyVersion.system
      rubygems_version = Gem::Version.create(Gem::VERSION)
      @definition.specs.each do |spec|
        if required_ruby_version = spec.required_ruby_version
          unless required_ruby_version.satisfied_by?(system_ruby.gem_version)
            raise InstallError, "#{spec.full_name} requires ruby version #{required_ruby_version}, "                "which is incompatible with the current version, #{system_ruby}"
          end
        end
        next unless required_rubygems_version = spec.required_rubygems_version
        unless required_rubygems_version.satisfied_by?(rubygems_version)
          raise InstallError, "#{spec.full_name} requires rubygems version #{required_rubygems_version}, "              "which is incompatible with the current version, #{rubygems_version}"
        end
      end
    end

install(options) click to toggle source

the order that the resolver provides is significant, since dependencies might affect the installation of a gem. that said, it's a rare situation (other than rake), and parallel installation is SO MUCH FASTER. so we let people opt in.

    # File lib/bundler/installer.rb, line 160
    def install(options)
      Bundler.rubygems.load_plugins
      force = options["force"]
      jobs = 1
      jobs = [Bundler.settings[:jobs].to_i - 1, 1].max if can_install_in_parallel?
      install_in_parallel jobs, options[:standalone], force
    end

install_in_parallel(size, standalone, force = false) click to toggle source

    # File lib/bundler/installer.rb, line 197
    def install_in_parallel(size, standalone, force = false)
      spec_installations = ParallelInstaller.call(self, @definition.specs, size, standalone, force)
      spec_installations.each do |installation|
        post_install_messages[installation.name] = installation.post_install_message if installation.has_post_install_message?
      end
    end

lock(opts = {}) click to toggle source

    # File lib/bundler/installer.rb, line 228
    def lock(opts = {})
      @definition.lock(Bundler.default_lockfile, opts[:preserve_unknown_sections])
    end

resolve_if_need(options) click to toggle source

    # File lib/bundler/installer.rb, line 213
    def resolve_if_need(options)
      if !options["update"] && !options["force"] && !Bundler.settings[:inline] && Bundler.default_lockfile.file?
        local = Bundler.ui.silence do
          begin
            tmpdef = Definition.build(Bundler.default_gemfile, Bundler.default_lockfile, nil)
            true unless tmpdef.new_platform? || tmpdef.missing_dependencies.any?
          rescue BundlerError
          end
        end
      end

      return if local
      options["local"] ? @definition.resolve_with_cache! : @definition.resolve_remotely!
    end