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# -*- ruby -*-
#--
# Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others.
# All rights reserved.
# See LICENSE.txt for permissions.
#++
##
# RubyGems is the Ruby standard for publishing and managing third party
# libraries.
#
# For user documentation, see:
#
# * <tt>gem help</tt> and <tt>gem help [command]</tt>
# * {RubyGems User Guide}[http://docs.rubygems.org/read/book/1]
# * {Frequently Asked Questions}[http://docs.rubygems.org/read/book/3]
#
# For gem developer documentation see:
#
# * {Creating Gems}[http://docs.rubygems.org/read/chapter/5]
# * Gem::Specification
# * Gem::Version for version dependency notes
#
# Further RubyGems documentation can be found at:
#
# * {RubyGems API}[http://rubygems.rubyforge.org/rdoc] (also available from
# <tt>gem server</tt>)
# * {RubyGems Bookshelf}[http://rubygem.org]
#
# == RubyGems Plugins
#
# As of RubyGems 1.3.2, RubyGems will load plugins installed in gems or
# $LOAD_PATH. Plugins must be named 'rubygems_plugin' (.rb, .so, etc) and
# placed at the root of your gem's #require_path. Plugins are discovered via
# Gem::find_files then loaded. Take care when implementing a plugin as your
# plugin file may be loaded multiple times if multiple versions of your gem
# are installed.
#
# For an example plugin, see the graph gem which adds a `gem graph` command.
#
# == RubyGems Defaults, Packaging
#
# RubyGems defaults are stored in rubygems/defaults.rb. If you're packaging
# RubyGems or implementing Ruby you can change RubyGems' defaults.
#
# For RubyGems packagers, provide lib/rubygems/operating_system.rb and
# override any defaults from lib/rubygems/defaults.rb.
#
# For Ruby implementers, provide lib/rubygems/defaults/#{RUBY_ENGINE}.rb and
# override any defaults from lib/rubygems/defaults.rb.
#
# If you need RubyGems to perform extra work on install or uninstall, your
# defaults override file can set pre and post install and uninstall hooks.
# See Gem::pre_install, Gem::pre_uninstall, Gem::post_install,
# Gem::post_uninstall.
#
# == Bugs
#
# You can submit bugs to the
# {RubyGems bug tracker}[https://github.com/rubygems/rubygems/issues]
# on GitHub
#
# == Credits
#
# RubyGems is currently maintained by Eric Hodel.
#
# RubyGems was originally developed at RubyConf 2003 by:
#
# * Rich Kilmer -- rich(at)infoether.com
# * Chad Fowler -- chad(at)chadfowler.com
# * David Black -- dblack(at)wobblini.net
# * Paul Brannan -- paul(at)atdesk.com
# * Jim Weirch -- jim(at)weirichhouse.org
#
# Contributors:
#
# * Gavin Sinclair -- gsinclair(at)soyabean.com.au
# * George Marrows -- george.marrows(at)ntlworld.com
# * Dick Davies -- rasputnik(at)hellooperator.net
# * Mauricio Fernandez -- batsman.geo(at)yahoo.com
# * Simon Strandgaard -- neoneye(at)adslhome.dk
# * Dave Glasser -- glasser(at)mit.edu
# * Paul Duncan -- pabs(at)pablotron.org
# * Ville Aine -- vaine(at)cs.helsinki.fi
# * Eric Hodel -- drbrain(at)segment7.net
# * Daniel Berger -- djberg96(at)gmail.com
# * Phil Hagelberg -- technomancy(at)gmail.com
# * Ryan Davis -- ryand-ruby(at)zenspider.com
# * Evan Phoenix -- evan(at)fallingsnow.net
# * Steve Klabnik -- steve(at)steveklabnik.com
#
# (If your name is missing, PLEASE let us know!)
#
# Thanks!
#
# -The RubyGems Team
require 'rbconfig'
module Gem
VERSION = '2.0.a'
end
# Must be first since it unloads the prelude from 1.9.2
require 'rubygems/compatibility'
require 'rubygems/defaults'
require 'rubygems/deprecate'
require 'rubygems/errors'
require 'rubygems/source_list'
module Gem
RUBYGEMS_DIR = File.dirname File.expand_path(__FILE__)
##
# An Array of Regexps that match windows ruby platforms.
WIN_PATTERNS = [
/bccwin/i,
/cygwin/i,
/djgpp/i,
/mingw/i,
/mswin/i,
/wince/i,
]
GEM_DEP_FILES = %w!gem.deps.rb Gemfile Isolate!
@@win_platform = nil
@configuration = nil
@loaded_specs = {}
@platforms = []
@ruby = nil
@sources = nil
@post_build_hooks ||= []
@post_install_hooks ||= []
@post_uninstall_hooks ||= []
@pre_uninstall_hooks ||= []
@pre_install_hooks ||= []
@pre_reset_hooks ||= []
@post_reset_hooks ||= []
##
# Try to activate a gem containing +path+. Returns true if
# activation succeeded or wasn't needed because it was already
# activated. Returns false if it can't find the path in a gem.
def self.try_activate path
# TODO: deprecate when 1.9.3 comes out.
# finds the _latest_ version... regardless of loaded specs and their deps
# TODO: use find_all and bork if ambiguous
spec = Gem::Specification.find_by_path path
return false unless spec
begin
spec.activate
rescue Gem::LoadError # this could fail due to gem dep collisions, go lax
Gem::Specification.find_by_name(spec.name).activate
end
return true
end
def self.needs
rs = Gem::RequestSet.new
yield rs
finish_resolve rs
end
def self.finish_resolve(request_set=Gem::RequestSet.new)
request_set.import Gem::Specification.unresolved_deps.values
request_set.resolve_current.each do |s|
s.full_spec.activate
end
end
def self.detect_gemdeps
if path = ENV['RUBYGEMS_GEMDEPS']
path = path.dup.untaint
if path == "-"
path = GEM_DEP_FILES.find { |f| File.exists?(f) }
return unless path
end
return unless File.exists? path
rs = Gem::RequestSet.new
rs.load_gemdeps path
rs.resolve_current.map do |s|
sp = s.full_spec
sp.activate
sp
end
end
end
##
# Find the full path to the executable for gem +name+. If the +exec_name+
# is not given, the gem's default_executable is chosen, otherwise the
# specified executable's path is returned. +requirements+ allows
# you to specify specific gem versions.
def self.bin_path(name, exec_name = nil, *requirements)
# TODO: fails test_self_bin_path_bin_file_gone_in_latest
# Gem::Specification.find_by_name(name, *requirements).bin_file exec_name
raise ArgumentError, "you must supply exec_name" unless exec_name
requirements = Gem::Requirement.default if
requirements.empty?
specs = Gem::Dependency.new(name, requirements).matching_specs(true)
raise Gem::GemNotFoundException,
"can't find gem #{name} (#{requirements})" if specs.empty?
specs = specs.find_all { |spec|
spec.executables.include? exec_name
} if exec_name
unless spec = specs.last
msg = "can't find gem #{name} (#{requirements}) with executable #{exec_name}"
raise Gem::GemNotFoundException, msg
end
spec.bin_file exec_name
end
##
# The mode needed to read a file as straight binary.
def self.binary_mode
'rb'
end
##
# The path where gem executables are to be installed.
def self.bindir(install_dir=Gem.dir)
# TODO: move to Gem::Dirs
return File.join install_dir, 'bin' unless
install_dir.to_s == Gem.default_dir.to_s
Gem.default_bindir
end
##
# Reset the +dir+ and +path+ values. The next time +dir+ or +path+
# is requested, the values will be calculated from scratch. This is
# mainly used by the unit tests to provide test isolation.
def self.clear_paths
@paths = nil
@user_home = nil
Gem::Specification.reset
Gem::Security.reset if const_defined? :Security
end
##
# The path to standard location of the user's .gemrc file.
def self.config_file
@config_file ||= File.join Gem.user_home, '.gemrc'
end
##
# The standard configuration object for gems.
def self.configuration
@configuration ||= Gem::ConfigFile.new []
end
##
# Use the given configuration object (which implements the ConfigFile
# protocol) as the standard configuration object.
def self.configuration=(config)
@configuration = config
end
##
# The path the the data directory specified by the gem name. If the
# package is not available as a gem, return nil.
def self.datadir(gem_name)
# TODO: deprecate and move to Gem::Specification
# and drop the extra ", gem_name" which is uselessly redundant
spec = @loaded_specs[gem_name]
return nil if spec.nil?
File.join spec.full_gem_path, "data", gem_name
end
##
# A Zlib::Deflate.deflate wrapper
def self.deflate(data)
require 'zlib'
Zlib::Deflate.deflate data
end
# DOC: needs doc'd or :nodoc'd
def self.paths
@paths ||= Gem::PathSupport.new
end
# DOC: needs doc'd or :nodoc'd
def self.paths=(env)
clear_paths
@paths = Gem::PathSupport.new env
Gem::Specification.dirs = @paths.path # FIX: home is at end
end
##
# The path where gems are to be installed.
#--
# FIXME deprecate these once everything else has been done -ebh
def self.dir
# TODO: raise "no"
paths.home
end
def self.path
# TODO: raise "no"
paths.path
end
##
# Expand each partial gem path with each of the required paths specified
# in the Gem spec. Each expanded path is yielded.
def self.each_load_path(partials)
partials.each do |gp|
base = File.basename gp
specfn = File.join(dir, "specifications", "#{base}.gemspec")
if File.exists? specfn
spec = eval(File.read(specfn))
spec.require_paths.each do |rp|
yield File.join(gp,rp)
end
else
filename = File.join(gp, 'lib')
yield(filename) if File.exists? filename
end
end
end
private_class_method :each_load_path
##
# Quietly ensure the named Gem directory contains all the proper
# subdirectories. If we can't create a directory due to a permission
# problem, then we will silently continue.
def self.ensure_gem_subdirectories dir = Gem.dir
old_umask = File.umask
File.umask old_umask | 002
require 'fileutils'
%w[cache build_info doc gems specifications].each do |name|
subdir = File.join dir, name
next if File.exist? subdir
FileUtils.mkdir_p subdir rescue nil # in case of perms issues -- lame
end
ensure
File.umask old_umask
end
##
# Returns a list of paths matching +glob+ that can be used by a gem to pick
# up features from other gems. For example:
#
# Gem.find_files('rdoc/discover').each do |path| load path end
#
# if +check_load_path+ is true (the default), then find_files also searches
# $LOAD_PATH for files as well as gems.
#
# Note that find_files will return all files even if they are from different
# versions of the same gem.
def self.find_files(glob, check_load_path=true)
files = []
if check_load_path
files = $LOAD_PATH.map { |load_path|
Dir["#{File.expand_path glob, load_path}#{Gem.suffix_pattern}"]
}.flatten.select { |file| File.file? file.untaint }
end
files.concat Gem::Specification.map { |spec|
spec.matches_for_glob("#{glob}#{Gem.suffix_pattern}")
}.flatten
# $LOAD_PATH might contain duplicate entries or reference
# the spec dirs directly, so we prune.
files.uniq! if check_load_path
return files
end
##
# Finds the user's home directory.
#--
# Some comments from the ruby-talk list regarding finding the home
# directory:
#
# I have HOME, USERPROFILE and HOMEDRIVE + HOMEPATH. Ruby seems
# to be depending on HOME in those code samples. I propose that
# it should fallback to USERPROFILE and HOMEDRIVE + HOMEPATH (at
# least on Win32).
#++
#--
#
# FIXME move to pathsupport
#
#++
def self.find_home
windows = File::ALT_SEPARATOR
if not windows or RUBY_VERSION >= '1.9' then
File.expand_path "~"
else
['HOME', 'USERPROFILE'].each do |key|
return File.expand_path ENV[key] if ENV[key]
end
if ENV['HOMEDRIVE'] && ENV['HOMEPATH'] then
File.expand_path "#{ENV['HOMEDRIVE']}#{ENV['HOMEPATH']}"
end
end
rescue
if windows then
File.expand_path File.join(ENV['HOMEDRIVE'] || ENV['SystemDrive'], '/')
else
File.expand_path "/"
end
end
private_class_method :find_home
##
# Zlib::GzipReader wrapper that unzips +data+.
def self.gunzip(data)
# TODO: move to utils
require 'stringio'
require 'zlib'
data = StringIO.new data
Zlib::GzipReader.new(data).read
end
##
# Zlib::GzipWriter wrapper that zips +data+.
def self.gzip(data)
# TODO: move to utils
require 'stringio'
require 'zlib'
zipped = StringIO.new
Zlib::GzipWriter.wrap zipped do |io| io.write data end
zipped.string
end
##
# A Zlib::Inflate#inflate wrapper
def self.inflate(data)
# TODO: move to utils
require 'zlib'
Zlib::Inflate.inflate data
end
##
# Top level install helper method. Allows you to install gems interactively:
#
# % irb
# >> Gem.install "minitest"
# Fetching: minitest-3.0.1.gem (100%)
# => [#<Gem::Specification:0x1013b4528 @name="minitest", ...>]
def self.install name, version = Gem::Requirement.default
require "rubygems/dependency_installer"
inst = Gem::DependencyInstaller.new
inst.install name, version
inst.installed_gems
end
##
# Get the default RubyGems API host. This is normally
# <tt>https://rubygems.org</tt>.
def self.host
# TODO: move to utils
@host ||= Gem::DEFAULT_HOST
end
## Set the default RubyGems API host.
def self.host= host
# TODO: move to utils
@host = host
end
##
# The index to insert activated gem paths into the $LOAD_PATH.
#
# Defaults to the site lib directory unless gem_prelude.rb has loaded paths,
# then it inserts the activated gem's paths before the gem_prelude.rb paths
# so you can override the gem_prelude.rb default $LOAD_PATH paths.
def self.load_path_insert_index
index = $LOAD_PATH.index ConfigMap[:sitelibdir]
index
end
@yaml_loaded = false
##
# Loads YAML, preferring Psych
def self.load_yaml
return if @yaml_loaded
test_syck = ENV['TEST_SYCK']
unless test_syck
begin
gem 'psych', '~> 1.2', '>= 1.2.1'
rescue Gem::LoadError
# It's OK if the user does not have the psych gem installed. We will
# attempt to require the stdlib version
end
begin
# Try requiring the gem version *or* stdlib version of psych.
require 'psych'
rescue ::LoadError
# If we can't load psych, thats fine, go on.
else
# If 'yaml' has already been required, then we have to
# be sure to switch it over to the newly loaded psych.
if defined?(YAML::ENGINE) && YAML::ENGINE.yamler != "psych"
YAML::ENGINE.yamler = "psych"
end
require 'rubygems/psych_additions'
require 'rubygems/psych_tree'
end
end
require 'yaml'
# If we're supposed to be using syck, then we may have to force
# activate it via the YAML::ENGINE API.
if test_syck and defined?(YAML::ENGINE)
YAML::ENGINE.yamler = "syck" unless YAML::ENGINE.syck?
end
# Now that we're sure some kind of yaml library is loaded, pull
# in our hack to deal with Syck's DefaultKey ugliness.
require 'rubygems/syck_hack'
@yaml_loaded = true
end
##
# The file name and line number of the caller of the caller of this method.
def self.location_of_caller
caller[1] =~ /(.*?):(\d+).*?$/i
file = $1
lineno = $2.to_i
# TODO: it is ALWAYS joined! STUPID!
[file, lineno]
end
##
# The version of the Marshal format for your Ruby.
def self.marshal_version
"#{Marshal::MAJOR_VERSION}.#{Marshal::MINOR_VERSION}"
end
##
# Set array of platforms this RubyGems supports (primarily for testing).
def self.platforms=(platforms)
@platforms = platforms
end
##
# Array of platforms this RubyGems supports.
def self.platforms
@platforms ||= []
if @platforms.empty?
@platforms = [Gem::Platform::RUBY, Gem::Platform.local]
end
@platforms
end
##
# Adds a post-build hook that will be passed an Gem::Installer instance
# when Gem::Installer#install is called. The hook is called after the gem
# has been extracted and extensions have been built but before the
# executables or gemspec has been written. If the hook returns +false+ then
# the gem's files will be removed and the install will be aborted.
def self.post_build(&hook)
@post_build_hooks << hook
end
##
# Adds a post-install hook that will be passed an Gem::Installer instance
# when Gem::Installer#install is called
def self.post_install(&hook)
@post_install_hooks << hook
end
##
# Adds a post-installs hook that will be passed a Gem::DependencyInstaller
# and a list of installed specifications when
# Gem::DependencyInstaller#install is complete
def self.done_installing(&hook)
@done_installing_hooks << hook
end
##
# Adds a hook that will get run after Gem::Specification.reset is
# run.
def self.post_reset(&hook)
@post_reset_hooks << hook
end
##
# Adds a post-uninstall hook that will be passed a Gem::Uninstaller instance
# and the spec that was uninstalled when Gem::Uninstaller#uninstall is
# called
def self.post_uninstall(&hook)
@post_uninstall_hooks << hook
end
##
# Adds a pre-install hook that will be passed an Gem::Installer instance
# when Gem::Installer#install is called. If the hook returns +false+ then
# the install will be aborted.
def self.pre_install(&hook)
@pre_install_hooks << hook
end
##
# Adds a hook that will get run before Gem::Specification.reset is
# run.
def self.pre_reset(&hook)
@pre_reset_hooks << hook
end
##
# Adds a pre-uninstall hook that will be passed an Gem::Uninstaller instance
# and the spec that will be uninstalled when Gem::Uninstaller#uninstall is
# called
def self.pre_uninstall(&hook)
@pre_uninstall_hooks << hook
end
##
# The directory prefix this RubyGems was installed at. If your
# prefix is in a standard location (ie, rubygems is installed where
# you'd expect it to be), then prefix returns nil.
def self.prefix
prefix = File.dirname RUBYGEMS_DIR
if prefix != File.expand_path(ConfigMap[:sitelibdir]) and
prefix != File.expand_path(ConfigMap[:libdir]) and
'lib' == File.basename(RUBYGEMS_DIR) then
prefix
end
end
##
# Refresh available gems from disk.
def self.refresh
Gem::Specification.reset
end
##
# Safely read a file in binary mode on all platforms.
def self.read_binary(path)
File.open path, binary_mode do |f| f.read end
end
##
# The path to the running Ruby interpreter.
def self.ruby
if @ruby.nil? then
@ruby = File.join(ConfigMap[:bindir],
"#{ConfigMap[:ruby_install_name]}#{ConfigMap[:EXEEXT]}")
@ruby = "\"#{@ruby}\"" if @ruby =~ /\s/
end
@ruby
end
# DOC: needs doc'd or :nodoc'd
def self.latest_spec_for name
dependency = Gem::Dependency.new name
fetcher = Gem::SpecFetcher.fetcher
spec_tuples = fetcher.find_matching dependency
match = spec_tuples.select { |(n, _, p), _|
n == name and Gem::Platform.match p
}.sort_by { |(_, version, _), _|
version
}.last
match and fetcher.fetch_spec(*match)
end
# DOC: needs doc'd or :nodoc'd
def self.latest_version_for name
spec = latest_spec_for name
spec and spec.version
end
# DOC: needs doc'd or :nodoc'd
def self.latest_rubygems_version
latest_version_for("rubygems-update") or
raise "Can't find 'rubygems-update' in any repo. Check `gem source list`."
end
##
# A Gem::Version for the currently running ruby.
def self.ruby_version
return @ruby_version if defined? @ruby_version
version = RUBY_VERSION.dup
if defined?(RUBY_PATCHLEVEL) && RUBY_PATCHLEVEL != -1 then
version << ".#{RUBY_PATCHLEVEL}"
elsif defined?(RUBY_REVISION) then
version << ".dev.#{RUBY_REVISION}"
end
@ruby_version = Gem::Version.new version
end
##
# A Gem::Version for the currently running RubyGems
def self.rubygems_version
return @rubygems_version if defined? @rubygems_version
@rubygems_version = Gem::Version.new Gem::VERSION
end
##
# Returns an Array of sources to fetch remote gems from. If the sources
# list is empty, attempts to load the "sources" gem, then uses
# default_sources if it is not installed.
def self.sources
@sources ||= Gem::SourceList.from(default_sources)
end
##
# Need to be able to set the sources without calling
# Gem.sources.replace since that would cause an infinite loop.
#
# DOC: This comment is not documentation about the method itself, it's
# more of a code comment about the implementation.
def self.sources= new_sources
if !new_sources
@sources = nil
else
@sources = Gem::SourceList.from(new_sources)
end
end
##
# Glob pattern for require-able path suffixes.
def self.suffix_pattern
@suffix_pattern ||= "{#{suffixes.join(',')}}"
end
##
# Suffixes for require-able paths.
def self.suffixes
@suffixes ||= ['',
'.rb',
*%w(DLEXT DLEXT2).map { |key|
val = RbConfig::CONFIG[key]
next unless val and not val.empty?
".#{val}"
}
].compact.uniq
end
##
# Prints the amount of time the supplied block takes to run using the debug
# UI output.
def self.time(msg, width = 0, display = Gem.configuration.verbose)
now = Time.now
value = yield
elapsed = Time.now - now
ui.say "%2$*1$s: %3$3.3fs" % [-width, msg, elapsed] if display
value
end
##
# Lazily loads DefaultUserInteraction and returns the default UI.
def self.ui
require 'rubygems/user_interaction'
Gem::DefaultUserInteraction.ui
end
##
# Use the +home+ and +paths+ values for Gem.dir and Gem.path. Used mainly
# by the unit tests to provide environment isolation.
def self.use_paths(home, *paths)
paths = nil if paths == [nil]
paths = paths.first if Array === Array(paths).first
self.paths = { "GEM_HOME" => home, "GEM_PATH" => paths }
# TODO: self.paths = home, paths
end
##
# The home directory for the user.
def self.user_home
@user_home ||= find_home.untaint
end
##
# Is this a windows platform?
def self.win_platform?
if @@win_platform.nil? then
@@win_platform = !!WIN_PATTERNS.find { |r| RUBY_PLATFORM =~ r }
end
@@win_platform
end
##
# Load +plugins+ as ruby files
def self.load_plugin_files(plugins)
plugins.each do |plugin|
# Skip older versions of the GemCutter plugin: Its commands are in
# RubyGems proper now.
next if plugin =~ /gemcutter-0\.[0-3]/
begin
load plugin
rescue ::Exception => e
details = "#{plugin.inspect}: #{e.message} (#{e.class})"
warn "Error loading RubyGems plugin #{details}"
end
end
end
##
# Find all 'rubygems_plugin' files in installed gems and load them
def self.load_plugins
load_plugin_files find_files('rubygems_plugin', false)
end
##
# Find all 'rubygems_plugin' files in $LOAD_PATH and load them
def self.load_env_plugins
path = "rubygems_plugin"
files = []
$LOAD_PATH.each do |load_path|
globbed = Dir["#{File.expand_path path, load_path}#{Gem.suffix_pattern}"]
globbed.each do |load_path_file|
files << load_path_file if File.file?(load_path_file.untaint)
end
end
load_plugin_files files
end
# FIX: Almost everywhere else we use the `def self.` way of defining class
# methods, and then we switch over to `class << self` here. Pick one or the
# other.
class << self
##
# Hash of loaded Gem::Specification keyed by name
attr_reader :loaded_specs
##
# The list of hooks to be run after Gem::Installer#install extracts files
# and builds extensions
attr_reader :post_build_hooks
##
# The list of hooks to be run after Gem::Installer#install completes
# installation
attr_reader :post_install_hooks
##
# The list of hooks to be run after Gem::DependencyInstaller installs a
# set of gems
attr_reader :done_installing_hooks
##
# The list of hooks to be run after Gem::Specification.reset is run.
attr_reader :post_reset_hooks
##
# The list of hooks to be run after Gem::Uninstaller#uninstall completes
# installation
attr_reader :post_uninstall_hooks
##
# The list of hooks to be run before Gem::Installer#install does any work
attr_reader :pre_install_hooks
##
# The list of hooks to be run before Gem::Specification.reset is run.
attr_reader :pre_reset_hooks
##
# The list of hooks to be run before Gem::Uninstaller#uninstall does any
# work
attr_reader :pre_uninstall_hooks
end
##
# Location of Marshal quick gemspecs on remote repositories
MARSHAL_SPEC_DIR = "quick/Marshal.#{Gem.marshal_version}/"
autoload :Version, 'rubygems/version'
autoload :Requirement, 'rubygems/requirement'
autoload :Dependency, 'rubygems/dependency'
autoload :DependencyList, 'rubygems/dependency_list'
autoload :SpecFetcher, 'rubygems/spec_fetcher'
autoload :Specification, 'rubygems/specification'
autoload :PathSupport, 'rubygems/path_support'
autoload :Platform, 'rubygems/platform'
autoload :ConfigFile, 'rubygems/config_file'
autoload :DependencyResolver, 'rubygems/dependency_resolver'
autoload :RequestSet, 'rubygems/request_set'
require "rubygems/specification"
end
# REFACTOR: All these patches should be pulled out into their own file.
module Kernel
# REFACTOR: This should be pulled out into some kind of hacks file.
remove_method :gem if 'method' == defined? gem # from gem_prelude.rb on 1.9
##
# Use Kernel#gem to activate a specific version of +gem_name+.
#
# +requirements+ is a list of version requirements that the
# specified gem must match, most commonly "= example.version.number". See
# Gem::Requirement for how to specify a version requirement.
#
# If you will be activating the latest version of a gem, there is no need to
# call Kernel#gem, Kernel#require will do the right thing for you.
#
# Kernel#gem returns true if the gem was activated, otherwise false. If the
# gem could not be found, didn't match the version requirements, or a
# different version was already activated, an exception will be raised.
#
# Kernel#gem should be called *before* any require statements (otherwise
# RubyGems may load a conflicting library version).
#
# In older RubyGems versions, the environment variable GEM_SKIP could be
# used to skip activation of specified gems, for example to test out changes
# that haven't been installed yet. Now RubyGems defers to -I and the
# RUBYLIB environment variable to skip activation of a gem.
#
# Example:
#
# GEM_SKIP=libA:libB ruby -I../libA -I../libB ./mycode.rb
def gem(gem_name, *requirements) # :doc:
skip_list = (ENV['GEM_SKIP'] || "").split(/:/)
raise Gem::LoadError, "skipping #{gem_name}" if skip_list.include? gem_name
if gem_name.kind_of? Gem::Dependency
unless Gem::Deprecate.skip
warn "#{Gem.location_of_caller.join ':'}:Warning: Kernel.gem no longer "\
"accepts a Gem::Dependency object, please pass the name "\
"and requirements directly"
end
requirements = gem_name.requirement
gem_name = gem_name.name
end
spec = Gem::Dependency.new(gem_name, *requirements).to_spec
spec.activate if spec
end
private :gem
end
require 'rubygems/exceptions'
# REFACTOR: This should be pulled out into some kind of hacks file.
gem_preluded = Gem::GEM_PRELUDE_SUCKAGE and defined? Gem
unless gem_preluded then # TODO: remove guard after 1.9.2 dropped
begin
##
# Defaults the operating system (or packager) wants to provide for RubyGems.
require 'rubygems/defaults/operating_system'
rescue LoadError
end
if defined?(RUBY_ENGINE) then
begin
##
# Defaults the ruby implementation wants to provide for RubyGems
require "rubygems/defaults/#{RUBY_ENGINE}"
rescue LoadError
end
end
end
##
# Enables the require hook for RubyGems.
require 'rubygems/custom_require'
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