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require "rubygems"
require "rubygems/config_file"
require "rubygems/gem_runner"
require "log4r"
module VagrantPlugins
module CommandPlugin
# This class provides methods to help with calling out to the
# `gem` command but using the RubyGems API.
class GemHelper
def initialize(gem_home)
@gem_home = gem_home.to_s
@logger = Log4r::Logger.new("vagrant::plugins::plugincommand::gemhelper")
end
# This will yield the given block with the proper ENV setup so
# that RubyGems only sees the gems in the Vagrant-managed gem
# path.
def with_environment
old_gem_home = ENV["GEM_HOME"]
old_gem_path = ENV["GEM_PATH"]
ENV["GEM_HOME"] = @gem_home
ENV["GEM_PATH"] = @gem_home
@logger.debug("Set GEM_* to: #{ENV["GEM_HOME"]}")
# Clear paths so that it reads the new GEM_HOME setting
Gem.paths = ENV
# Set a custom configuration to avoid loading ~/.gemrc loads and
# /etc/gemrc and so on.
old_config = nil
begin
old_config = Gem.configuration
rescue Psych::SyntaxError
# Just ignore this. This means that the ".gemrc" file has
# an invalid syntax and can't be loaded. We don't care, because
# when we set Gem.configuration to nil later, it'll force a reload
# if it is needed.
end
Gem.configuration = NilGemConfig.new
# Clear the sources so that installation uses custom sources
old_sources = Gem.sources
Gem.sources = Gem.default_sources
Vagrant::Bundler::DEFAULT_GEM_SOURCES.each do |source|
if !Gem.sources.include?(source)
Gem.sources << source
end
end
# Use a silent UI so that we have no output
Gem::DefaultUserInteraction.use_ui(Gem::SilentUI.new) do
return yield
end
ensure
# Restore the old GEM_* settings
ENV["GEM_HOME"] = old_gem_home
ENV["GEM_PATH"] = old_gem_path
# Reset everything
Gem.configuration = old_config
Gem.paths = ENV
Gem.sources = old_sources.to_a
end
# This is pretty hacky but it is a custom implementation of
# Gem::ConfigFile so that we don't load any gemrc files.
class NilGemConfig < Gem::ConfigFile
def initialize
# We _can not_ `super` here because that can really mess up
# some other configuration state. We need to just set everything
# directly.
@api_keys = {}
@args = []
@backtrace = false
@bulk_threshold = 1000
@hash = {}
@update_sources = true
@verbose = true
end
end
end
end
end
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