Class: Bundler::Installer

### Home Classes Methods

### In Files

- lib/bundler/installer.rb

### Parent

Bundler::Environment

### Methods

- ::install
- #generate_bundler_executable_stubs
- #install_gem_from_spec
- #run

### Files

- bundle
- bundle-config
- bundle-config.txt
- bundle-exec
- bundle-exec.txt
- bundle-install
- bundle-install.txt
- bundle-package
- bundle-package.txt
- bundle-platform
- bundle-platform.txt
- bundle-update
- bundle-update.txt
- bundle.txt
- gemfile.5.txt
- Executable
- Gemfile

### Class/Module Index

Quicksearch

- Bundler
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- Bundler::GemInstaller
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- Bundler::Runtime
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- Bundler::SpecSet
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- Bundler::UI
- Bundler::UI::RGProxy
- Bundler::UI::Shell
- Bundler::VersionConflict
- Gem
- Gem::Dependency
- Gem::Platform
- Gem::Requirement
- Gem::Specification
- Object

No matching classes.

# Bundler::Installer

### Attributes

post_install_messages[RW]

### 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 12
    def self.install(root, definition, options = {})
      installer = new(root, definition)
      installer.run(options)
      installer
    end

### Public Instance Methods

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

    # File lib/bundler/installer.rb, line 133
    def generate_bundler_executable_stubs(spec, options = {})
      if options[:binstubs_cmd] && spec.executables.empty?
        options = {}
        spec.runtime_dependencies.each do |dep|
          bins = Bundler.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.exists?(binstub_path) && !options[:force]
          exists << executable
          next
        end

        File.open(binstub_path, 'w', 0755) 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

install_gem_from_spec(spec, standalone = false) click to toggle source

    # File lib/bundler/installer.rb, line 98
    def install_gem_from_spec(spec, standalone = false)
      # Download the gem to get the spec, because some specs that are returned
      # by rubygems.org are broken and wrong.
      Bundler::Fetcher.fetch(spec) if spec.source.is_a?(Bundler::Source::Rubygems)

      # Fetch the build settings, if there are any
      settings = Bundler.settings["build.#{spec.name}"]
      Bundler.rubygems.with_build_args [settings] do
        spec.source.install(spec)
        Bundler.ui.debug "from #{spec.loaded_from} "
      end

      # newline comes after installing, some gems say "with native extensions"
      Bundler.ui.info ""
      if Bundler.settings[:bin] && standalone
        generate_standalone_bundler_executable_stubs(spec)
      elsif Bundler.settings[:bin]
        generate_bundler_executable_stubs(spec, :force => true)
      end

      FileUtils.rm_rf(Bundler.tmp)
    rescue Exception => e
      # install hook failed
      raise e if e.is_a?(Bundler::InstallHookError) || e.is_a?(Bundler::SecurityError)

      # other failure, likely a native extension build failure
      Bundler.ui.info ""
      Bundler.ui.warn "#{e.class}: #{e.message}"
      msg = "An error occurred while installing #{spec.name} (#{spec.version}),"
      msg << " and Bundler cannot continue.\nMake sure that `gem install"
      msg << " #{spec.name} -v '#{spec.version}'` succeeds before bundling."
      Bundler.ui.debug e.backtrace.join("\n")
      raise Bundler::InstallError, msg
    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 defintion 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 49
    def run(options)
      # Create the BUNDLE_PATH directory
      begin
        Bundler.bundle_path.mkpath unless Bundler.bundle_path.exist?
      rescue Errno::EEXIST
        raise PathError, "Could not install to path `#{Bundler.settings[:path]}` " +
          "because of an invalid symlink. Remove the symlink so the directory can be created."
      end

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

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

      if Bundler.default_lockfile.exist? && !options["update"]
        local = Bundler.ui.silence do
          begin
            tmpdef = Definition.build(Bundler.default_gemfile, Bundler.default_lockfile, nil)
            true unless tmpdef.new_platform? || tmpdef.missing_specs.any?
          rescue BundlerError
          end
        end
      end

      # Since we are installing, we can resolve the definition
      # using remote specs
      unless local
        options["local"] ?
          @definition.resolve_with_cache! :
          @definition.resolve_remotely!
      end

      # Must install gems in the order that the resolver provides
      # as dependencies might actually affect the installation of
      # the gem.
      Installer.post_install_messages = {}
      specs.each do |spec|
        install_gem_from_spec(spec, options[:standalone])
      end

      lock
      generate_standalone(options[:standalone]) if options[:standalone]
    end

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