##
# Gem::StubSpecification reads the stub: line from the gemspec. This prevents
# us having to eval the entire gemspec in order to find out certain
# information.
class Gem::StubSpecification < Gem::BasicSpecification
# :nodoc:
PREFIX = "# stub: "
OPEN_MODE = # :nodoc:
if Object.const_defined? :Encoding then
'r:UTF-8:-'
else
'r'
end
class StubLine # :nodoc: all
attr_reader :parts
def initialize(data)
@parts = data[PREFIX.length..-1].split(" ")
end
def name
@parts[0]
end
def version
Gem::Version.new @parts[1]
end
def platform
Gem::Platform.new @parts[2]
end
def require_paths
@parts[3..-1].join(" ").split("\0")
end
end
def initialize(filename)
self.loaded_from = filename
@data = nil
@extensions = nil
@name = nil
@spec = nil
end
##
# True when this gem has been activated
def activated?
@activated ||=
begin
loaded = Gem.loaded_specs[name]
loaded && loaded.version == version
end
end
def build_extensions # :nodoc:
return if default_gem?
return if extensions.empty?
to_spec.build_extensions
end
##
# If the gemspec contains a stubline, returns a StubLine instance. Otherwise
# returns the full Gem::Specification.
def data
unless @data
@extensions = []
open loaded_from, OPEN_MODE do |file|
begin
file.readline # discard encoding line
stubline = file.readline.chomp
if stubline.start_with?(PREFIX) then
@data = StubLine.new stubline
@extensions = $'.split "\0" if
/\A#{PREFIX}/ =~ file.readline.chomp
end
rescue EOFError
end
end
end
@data ||= to_spec
end
private :data
##
# Extensions for this gem
def extensions
return @extensions if @extensions
data # load
@extensions
end
##
# If a gem has a stub specification it doesn't need to bother with
# compatibility with original_name gems. It was installed with the
# normalized name.
def find_full_gem_path # :nodoc:
path = File.expand_path File.join gems_dir, full_name
path.untaint
path
end
##
# Full paths in the gem to add to <code>$LOAD_PATH</code> when this gem is
# activated.
def full_require_paths
@require_paths ||= data.require_paths
super
end
def missing_extensions?
return false if default_gem?
return false if extensions.empty?
to_spec.missing_extensions?
end
##
# Name of the gem
def name
@name ||= data.name
end
##
# Platform of the gem
def platform
@platform ||= data.platform
end
##
# Require paths of the gem
def require_paths
@require_paths ||= data.require_paths
super
end
##
# The full Gem::Specification for this gem, loaded from evalling its gemspec
def to_spec
@spec ||= if @data then
Gem.loaded_specs.values.find { |spec|
spec.name == name and spec.version == version
}
end
@spec ||= Gem::Specification.load(loaded_from)
@spec.ignored = @ignored if instance_variable_defined? :@ignored
@spec
end
##
# Is this StubSpecification valid? i.e. have we found a stub line, OR does
# the filename contain a valid gemspec?
def valid?
data
end
##
# Version of the gem
def version
@version ||= data.version
end
##
# Is there a stub line present for this StubSpecification?
def stubbed?
data.is_a? StubLine
end
end
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