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require 'rubygems'
require 'yaml'
module Rails
class VendorGemSourceIndex
# VendorGemSourceIndex acts as a proxy for the Gem source index, allowing
# gems to be loaded from vendor/gems. Rather than the standard gem repository format,
# vendor/gems contains unpacked gems, with YAML specifications in .specification in
# each gem directory.
include Enumerable
attr_reader :installed_source_index
attr_reader :vendor_source_index
@@silence_spec_warnings = false
def self.silence_spec_warnings
@@silence_spec_warnings
end
def self.silence_spec_warnings=(v)
@@silence_spec_warnings = v
end
def initialize(installed_index, vendor_dir=Rails::GemDependency.unpacked_path)
@installed_source_index = installed_index
@vendor_dir = vendor_dir
refresh!
end
def refresh!
# reload the installed gems
@installed_source_index.refresh!
vendor_gems = {}
# handle vendor Rails gems - they are identified by having loaded_from set to ""
# we add them manually to the list, so that other gems can find them via dependencies
Gem.loaded_specs.each do |n, s|
next unless s.loaded_from.empty?
vendor_gems[s.full_name] = s
end
# load specifications from vendor/gems
Dir[File.join(Rails::GemDependency.unpacked_path, '*')].each do |d|
dir_name = File.basename(d)
dir_version = version_for_dir(dir_name)
spec = load_specification(d)
if spec
if spec.full_name != dir_name
# mismatched directory name and gem spec - produced by 2.1.0-era unpack code
if dir_version
# fix the spec version - this is not optimal (spec.files may be wrong)
# but it's better than breaking apps. Complain to remind users to get correct specs.
# use ActiveSupport::Deprecation.warn, as the logger is not set yet
$stderr.puts("config.gem: Unpacked gem #{dir_name} in vendor/gems has a mismatched specification file."+
" Run 'rake gems:refresh_specs' to fix this.") unless @@silence_spec_warnings
spec.version = dir_version
else
$stderr.puts("config.gem: Unpacked gem #{dir_name} in vendor/gems is not in a versioned directory"+
"(should be #{spec.full_name}).") unless @@silence_spec_warnings
# continue, assume everything is OK
end
end
else
# no spec - produced by early-2008 unpack code
# emulate old behavior, and complain.
$stderr.puts("config.gem: Unpacked gem #{dir_name} in vendor/gems has no specification file."+
" Run 'rake gems:refresh_specs' to fix this.") unless @@silence_spec_warnings
if dir_version
spec = Gem::Specification.new
spec.version = dir_version
spec.require_paths = ['lib']
ext_path = File.join(d, 'ext')
spec.require_paths << 'ext' if File.exist?(ext_path)
spec.name = /^(.*)-[^-]+$/.match(dir_name)[1]
files = ['lib']
# set files to everything in lib/
files += Dir[File.join(d, 'lib', '*')].map { |v| v.gsub(/^#{d}\//, '') }
files += Dir[File.join(d, 'ext', '*')].map { |v| v.gsub(/^#{d}\//, '') } if ext_path
spec.files = files
else
$stderr.puts("config.gem: Unpacked gem #{dir_name} in vendor/gems not in a versioned directory."+
" Giving up.") unless @@silence_spec_warnings
next
end
end
spec.loaded_from = File.join(d, '.specification')
# finally, swap out full_gem_path
# it would be better to use a Gem::Specification subclass, but the YAML loads an explicit class
class << spec
def full_gem_path
path = File.join installation_path, full_name
return path if File.directory? path
File.join installation_path, original_name
end
end
vendor_gems[File.basename(d)] = spec
end
@vendor_source_index = Gem::SourceIndex.new(vendor_gems)
end
def version_for_dir(d)
matches = /-([^-]+)$/.match(d)
Gem::Version.new(matches[1]) if matches
end
def load_specification(gem_dir)
spec_file = File.join(gem_dir, '.specification')
YAML.load_file(spec_file) if File.exist?(spec_file)
end
def find_name(*args)
@installed_source_index.find_name(*args) + @vendor_source_index.find_name(*args)
end
def search(*args)
# look for vendor gems, and then installed gems - later elements take priority
@installed_source_index.search(*args) + @vendor_source_index.search(*args)
end
def each(&block)
@vendor_source_index.each(&block)
@installed_source_index.each(&block)
end
def add_spec(spec)
@vendor_source_index.add_spec spec
end
def remove_spec(spec)
@vendor_source_index.remove_spec spec
end
def size
@vendor_source_index.size + @installed_source_index.size
end
end
end
|
