diff options
Diffstat (limited to 'jni/ruby/lib/rubygems/core_ext')
| -rw-r--r-- | jni/ruby/lib/rubygems/core_ext/kernel_gem.rb | 73 | ||||
| -rwxr-xr-x | jni/ruby/lib/rubygems/core_ext/kernel_require.rb | 139 |
2 files changed, 212 insertions, 0 deletions
diff --git a/jni/ruby/lib/rubygems/core_ext/kernel_gem.rb b/jni/ruby/lib/rubygems/core_ext/kernel_gem.rb new file mode 100644 index 0000000..61e77fe --- /dev/null +++ b/jni/ruby/lib/rubygems/core_ext/kernel_gem.rb @@ -0,0 +1,73 @@ +## +# RubyGems adds the #gem method to allow activation of specific gem versions +# and overrides the #require method on Kernel to make gems appear as if they +# live on the <code>$LOAD_PATH</code>. See the documentation of these methods +# for further detail. + +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). + # + # Kernel#gem only loads prerelease versions when prerelease +requirements+ + # are given: + # + # gem 'rake', '>= 1.1.a', '< 2' + # + # 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 + + dep = Gem::Dependency.new(gem_name, *requirements) + + loaded = Gem.loaded_specs[gem_name] + + return false if loaded && dep.matches_spec?(loaded) + + spec = dep.to_spec + + Gem::LOADED_SPECS_MUTEX.synchronize { + spec.activate + } if spec + end + + private :gem + +end diff --git a/jni/ruby/lib/rubygems/core_ext/kernel_require.rb b/jni/ruby/lib/rubygems/core_ext/kernel_require.rb new file mode 100755 index 0000000..8f2cdde --- /dev/null +++ b/jni/ruby/lib/rubygems/core_ext/kernel_require.rb @@ -0,0 +1,139 @@ +#-- +# Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others. +# All rights reserved. +# See LICENSE.txt for permissions. +#++ + +require 'monitor' + +module Kernel + + RUBYGEMS_ACTIVATION_MONITOR = Monitor.new # :nodoc: + + if defined?(gem_original_require) then + # Ruby ships with a custom_require, override its require + remove_method :require + else + ## + # The Kernel#require from before RubyGems was loaded. + + alias gem_original_require require + private :gem_original_require + end + + ## + # When RubyGems is required, Kernel#require is replaced with our own which + # is capable of loading gems on demand. + # + # When you call <tt>require 'x'</tt>, this is what happens: + # * If the file can be loaded from the existing Ruby loadpath, it + # is. + # * Otherwise, installed gems are searched for a file that matches. + # If it's found in gem 'y', that gem is activated (added to the + # loadpath). + # + # The normal <tt>require</tt> functionality of returning false if + # that file has already been loaded is preserved. + + def require path + RUBYGEMS_ACTIVATION_MONITOR.enter + + path = path.to_path if path.respond_to? :to_path + + spec = Gem.find_unresolved_default_spec(path) + if spec + Gem.remove_unresolved_default_spec(spec) + gem(spec.name) + end + + # If there are no unresolved deps, then we can use just try + # normal require handle loading a gem from the rescue below. + + if Gem::Specification.unresolved_deps.empty? then + RUBYGEMS_ACTIVATION_MONITOR.exit + return gem_original_require(path) + end + + # If +path+ is for a gem that has already been loaded, don't + # bother trying to find it in an unresolved gem, just go straight + # to normal require. + #-- + # TODO request access to the C implementation of this to speed up RubyGems + + spec = Gem::Specification.stubs.find { |s| + s.activated? and s.contains_requirable_file? path + } + + begin + RUBYGEMS_ACTIVATION_MONITOR.exit + return gem_original_require(spec.to_fullpath(path) || path) + end if spec + + # Attempt to find +path+ in any unresolved gems... + + found_specs = Gem::Specification.find_in_unresolved path + + # If there are no directly unresolved gems, then try and find +path+ + # in any gems that are available via the currently unresolved gems. + # For example, given: + # + # a => b => c => d + # + # If a and b are currently active with c being unresolved and d.rb is + # requested, then find_in_unresolved_tree will find d.rb in d because + # it's a dependency of c. + # + if found_specs.empty? then + found_specs = Gem::Specification.find_in_unresolved_tree path + + found_specs.each do |found_spec| + found_spec.activate + end + + # We found +path+ directly in an unresolved gem. Now we figure out, of + # the possible found specs, which one we should activate. + else + + # Check that all the found specs are just different + # versions of the same gem + names = found_specs.map(&:name).uniq + + if names.size > 1 then + RUBYGEMS_ACTIVATION_MONITOR.exit + raise Gem::LoadError, "#{path} found in multiple gems: #{names.join ', '}" + end + + # Ok, now find a gem that has no conflicts, starting + # at the highest version. + valid = found_specs.select { |s| s.conflicts.empty? }.last + + unless valid then + le = Gem::LoadError.new "unable to find a version of '#{names.first}' to activate" + le.name = names.first + RUBYGEMS_ACTIVATION_MONITOR.exit + raise le + end + + valid.activate + end + + RUBYGEMS_ACTIVATION_MONITOR.exit + return gem_original_require(path) + rescue LoadError => load_error + RUBYGEMS_ACTIVATION_MONITOR.enter + + if load_error.message.start_with?("Could not find") or + (load_error.message.end_with?(path) and Gem.try_activate(path)) then + RUBYGEMS_ACTIVATION_MONITOR.exit + return gem_original_require(path) + else + RUBYGEMS_ACTIVATION_MONITOR.exit + end + + raise load_error + end + + private :require + +end + |