# File lib/bundler/installer.rb, line 142 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', 0777 & ~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
# File lib/bundler/installer.rb, line 97 def install_gem_from_spec(spec, standalone = false, worker = 0) # Fetch the build settings, if there are any settings = Bundler.settings["build.#{spec.name}"] install_message = nil post_install_message = nil debug_message = nil Bundler.rubygems.with_build_args [settings] do install_message, post_install_message, debug_message = spec.source.install(spec) if install_message.include? 'Installing' Bundler.ui.confirm install_message else Bundler.ui.info install_message end Bundler.ui.debug debug_message if debug_message Bundler.ui.debug "#{worker}: #{spec.name} (#{spec.version}) from #{spec.loaded_from}" end if Bundler.settings[:bin] && standalone generate_standalone_bundler_executable_stubs(spec) elsif Bundler.settings[:bin] generate_bundler_executable_stubs(spec, :force => true) end post_install_message rescue Errno::ENOSPC raise Bundler::InstallError, "Your disk is out of space. Free some " "space to be able to install your bundle." rescue Exception => e # if install hook failed or gem signature is bad, just die 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." unless spec.source.options["git"] msg << "\nMake sure that `gem install" msg << " #{spec.name} -v '#{spec.version}'` succeeds before bundling." end Bundler.ui.debug e.backtrace.join("\n") raise Bundler::InstallError, msg end
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 53 def run(options) create_bundle_path 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 # the order that the resolver provides is significant, since # dependencies might actually affect the installation of a gem. # that said, it's a rare situation (other than rake), and parallel # installation is just SO MUCH FASTER. so we let people opt in. jobs = [Bundler.settings[:jobs].to_i-1, 1].max if jobs > 1 && can_install_parallely? install_in_parallel jobs, options[:standalone] else install_sequentially options[:standalone] end lock unless Bundler.settings[:frozen] generate_standalone(options[:standalone]) if options[:standalone] end
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