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puma--puma/lib/puma/launcher/bundle_pruner.rb

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# frozen_string_literal: true
module Puma
class Launcher
# This class is used to pickup Gemfile changes during
# application restarts.
class BundlePruner
def initialize(original_argv, extra_runtime_dependencies, log_writer)
@original_argv = Array(original_argv)
@extra_runtime_dependencies = Array(extra_runtime_dependencies)
@log_writer = log_writer
end
def prune
return if ENV['PUMA_BUNDLER_PRUNED']
return unless defined?(Bundler)
require_rubygems_min_version!
unless puma_wild_path
log "! Unable to prune Bundler environment, continuing"
return
end
dirs = paths_to_require_after_prune
log '* Pruning Bundler environment'
home = ENV['GEM_HOME']
bundle_gemfile = Bundler.original_env['BUNDLE_GEMFILE']
bundle_app_config = Bundler.original_env['BUNDLE_APP_CONFIG']
with_unbundled_env do
ENV['GEM_HOME'] = home
ENV['BUNDLE_GEMFILE'] = bundle_gemfile
ENV['PUMA_BUNDLER_PRUNED'] = '1'
ENV["BUNDLE_APP_CONFIG"] = bundle_app_config
args = [Gem.ruby, puma_wild_path, '-I', dirs.join(':')] + @original_argv
# Ruby 2.0+ defaults to true which breaks socket activation
args += [{:close_others => false}]
Kernel.exec(*args)
end
end
private
def require_rubygems_min_version!
min_version = Gem::Version.new('2.2')
return if min_version <= Gem::Version.new(Gem::VERSION)
raise "prune_bundler is not supported on your version of RubyGems. " \
"You must have RubyGems #{min_version}+ to use this feature."
end
def puma_wild_path
puma_lib_dir = puma_require_paths.detect { |x| File.exist? File.join(x, '../bin/puma-wild') }
File.expand_path(File.join(puma_lib_dir, '../bin/puma-wild'))
end
def with_unbundled_env
bundler_ver = Gem::Version.new(Bundler::VERSION)
if bundler_ver < Gem::Version.new('2.1.0')
Bundler.with_clean_env { yield }
else
Bundler.with_unbundled_env { yield }
end
end
def paths_to_require_after_prune
puma_require_paths + extra_runtime_deps_paths
end
def extra_runtime_deps_paths
@extra_runtime_dependencies.map do |dep_name|
if (spec = spec_for_gem(dep_name))
require_paths_for_gem(spec)
else
log "* Could not load extra dependency: #{dep_name}"
nil
end
end.flatten.compact
end
def puma_require_paths
require_paths_for_gem(spec_for_gem('puma'))
end
def spec_for_gem(gem_name)
Bundler.rubygems.loaded_specs(gem_name)
end
def require_paths_for_gem(gem_spec)
gem_spec.full_require_paths
end
def log(str)
@log_writer.log(str)
end
end
end
end