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  • bundler/installer.rb

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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 bundler/installer.rb, line 22
def self.install(root, definition, options = {})
  installer = new(root, definition)
  Plugin.hook(Plugin::Events::GEM_BEFORE_INSTALL_ALL, definition.dependencies)
  installer.run(options)
  Plugin.hook(Plugin::Events::GEM_AFTER_INSTALL_ALL, definition.dependencies)
  installer
end
new(root, definition) click to toggle source 
 
               # File bundler/installer.rb, line 30
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 bundler/installer.rb, line 99
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 = Bundler.bin_path
  bin_path = bin_path
  relative_gemfile_path = Bundler.default_gemfile.relative_path_from(bin_path)
  relative_gemfile_path = relative_gemfile_path
  ruby_command = Thor::Util.ruby_command
  ruby_command = ruby_command
  template_path = File.expand_path("../templates/Executable", __FILE__)
  if spec.name == "bundler"
    template_path += ".bundler"
    spec.executables = %(bundle)
  end
  template = File.read(template_path)

  exists = []
  spec.executables.each do |executable|
    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|
      if RUBY_VERSION >= "2.6"
        f.puts ERB.new(template, :trim_mode => "-").result(binding)
      else
        f.puts ERB.new(template, nil, "-").result(binding)
      end
    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 bundler/installer.rb, line 162
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
  unless path = Bundler.settings[:path]
    raise "Can't standalone without an explicit path set"
  end
  standalone_path = Bundler.root.join(path).relative_path_from(bin_path)
  standalone_path = standalone_path
  template = File.read(File.expand_path("../templates/Executable.standalone", __FILE__))
  ruby_command = Thor::Util.ruby_command
  ruby_command = ruby_command

  spec.executables.each do |executable|
    next if executable == "bundle"
    executable_path = Pathname(spec.full_gem_path).join(spec.bindir, executable).relative_path_from(bin_path)
    executable_path = executable_path
    File.open "#{bin_path}/#{executable}", "w", 0o755 do |f|
      if RUBY_VERSION >= "2.6"
        f.puts ERB.new(template, :trim_mode => "-").result(binding)
      else
        f.puts ERB.new(template, nil, "-").result(binding)
      end
    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 Bundler will create the directory. This is usually the same location as RubyGems which typically is the `~/.gem` directory unless other specified.

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. If there are no dependencies specified then Bundler returns a warning message stating so and this method returns.

Fourthly, Bundler checks if the Gemfile.lock exists, and if so then proceeds to set up a definition based on the Gemfile and the Gemfile.lock. During this step Bundler will also download information about any new gems that are not in the Gemfile.lock and resolve any dependencies if needed.

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, if the user has specified the standalone flag, Bundler will generate the needed require paths and save them in a `setup.rb` file. See `bundle standalone –help` for more information.

 
               # File bundler/installer.rb, line 70
def run(options)
  create_bundle_path

  ProcessLock.lock do
    if Bundler.frozen_bundle?
      @definition.ensure_equivalent_gemfile_and_lockfile(options[:deployment])
    end

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

    if resolve_if_needed(options)
      ensure_specs_are_compatible!
      warn_on_incompatible_bundler_deps
      load_plugins
      options.delete(:jobs)
    else
      options[:jobs] = 1 # to avoid the overhead of Bundler::Worker
    end
    install(options)

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