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|
# frozen_string_literal: true
module Bundler
#
# This class handles installing and switching to the version of bundler needed
# by an application.
#
class SelfManager
def restart_with_locked_bundler_if_needed
return unless needs_switching? && installed?
restart_with_locked_bundler
end
def install_locked_bundler_and_restart_with_it_if_needed
return unless needs_switching?
install_and_restart_with_locked_bundler
end
private
def install_and_restart_with_locked_bundler
bundler_dep = Gem::Dependency.new("bundler", lockfile_version)
spec = fetch_spec_for(bundler_dep)
return if spec.nil?
Bundler.ui.info \
"Bundler #{current_version} is running, but your lockfile was generated with #{lockfile_version}. " \
"Installing Bundler #{lockfile_version} and restarting using that version."
spec.source.install(spec)
rescue StandardError => e
Bundler.ui.trace e
Bundler.ui.warn "There was an error installing the locked bundler version (#{lockfile_version}), rerun with the `--verbose` flag for more details. Going on using bundler #{current_version}."
else
restart_with_locked_bundler
end
def fetch_spec_for(bundler_dep)
source = Bundler::Source::Rubygems.new("remotes" => "https://rubygems.org")
source.remote!
source.add_dependency_names("bundler")
spec = source.specs.search(bundler_dep).first
if spec.nil?
Bundler.ui.warn "Your lockfile is locked to a version of bundler (#{lockfile_version}) that doesn't exist at https://rubygems.org/. Going on using #{current_version}"
end
spec
end
def restart_with_locked_bundler
configured_gem_home = ENV["GEM_HOME"]
configured_gem_path = ENV["GEM_PATH"]
cmd = [$PROGRAM_NAME, *ARGV]
cmd.unshift(Gem.ruby) unless File.executable?($PROGRAM_NAME)
Bundler.with_original_env do
Kernel.exec(
{ "GEM_HOME" => configured_gem_home, "GEM_PATH" => configured_gem_path, "BUNDLER_VERSION" => lockfile_version },
*cmd
)
end
end
def needs_switching?
ENV["BUNDLER_VERSION"].nil? &&
Bundler.rubygems.supports_bundler_trampolining? &&
SharedHelpers.in_bundle? &&
lockfile_version &&
!lockfile_version.end_with?(".dev") &&
lockfile_version != current_version &&
!updating?
end
def updating?
"update".start_with?(ARGV.first || " ") && ARGV[1..-1].any? {|a| a.start_with?("--bundler") }
end
def installed?
Bundler.configure
Bundler.rubygems.find_bundler(lockfile_version)
end
def current_version
@current_version ||= Bundler::VERSION
end
def lockfile_version
@lockfile_version ||= Bundler::LockfileParser.bundled_with
end
end
end
|
