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# frozen_string_literal: true
require "erb"
require "rubygems/dependency_installer"
require "bundler/worker"
require "bundler/installer/parallel_installer"
require "bundler/installer/standalone"
require "bundler/installer/gem_installer"
module Bundler
class Installer < Environment
class << self
attr_accessor :post_install_messages, :ambiguous_gems
Installer.post_install_messages = {}
Installer.ambiguous_gems = []
end
# Begins the installation process for Bundler.
# For more information see the #run method on this class.
def self.install(root, definition, options = {})
installer = new(root, definition)
installer.run(options)
installer
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[:bin] 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.
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
resolve_if_need(options)
install(options)
lock unless Bundler.settings[:frozen]
Standalone.new(options[:standalone], @definition).generate if options[:standalone]
end
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
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
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"
standalone_path = standalone_path = Pathname(Bundler.settings[:path]).expand_path.relative_path_from(bin_path)
executable_path = executable_path = Pathname(spec.full_gem_path).join(spec.bindir, executable).relative_path_from(bin_path)
File.open "#{bin_path}/#{executable}", "w", 0755 do |f|
f.puts ERB.new(template, nil, "-").result(binding)
end
end
end
private
# 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.
def install(options)
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
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
def install_in_parallel(size, standalone, force = false)
ParallelInstaller.call(self, specs, size, standalone, force)
end
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 of an invalid symlink. Remove the symlink so the directory can be created."
end
def resolve_if_need(options)
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
return if local
options["local"] ? @definition.resolve_with_cache! : @definition.resolve_remotely!
end
end
end
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