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##
# BasicSpecification is an abstract class which implements some common code
# used by both Specification and StubSpecification.
class Gem::BasicSpecification
##
# The path this gemspec was loaded from. This attribute is not persisted.
attr_reader :loaded_from
def self.default_specifications_dir
File.join(Gem.default_dir, "specifications", "default")
end
##
# True when the gem has been activated
def activated?
raise NotImplementedError
end
##
# Returns the full path to the base gem directory.
#
# eg: /usr/local/lib/ruby/gems/1.8
def base_dir
return Gem.dir unless loaded_from
@base_dir ||= if default_gem? then
File.dirname File.dirname File.dirname loaded_from
else
File.dirname File.dirname loaded_from
end
end
##
# Return true if this spec can require +file+.
def contains_requirable_file? file
root = full_gem_path
suffixes = Gem.suffixes
require_paths.any? do |lib|
base = "#{root}/#{lib}/#{file}"
suffixes.any? { |suf| File.file? "#{base}#{suf}" }
end
end
def default_gem?
loaded_from &&
File.dirname(loaded_from) == self.class.default_specifications_dir
end
def find_full_gem_path # :nodoc:
# TODO: also, shouldn't it default to full_name if it hasn't been written?
path = File.expand_path File.join(gems_dir, full_name)
path.untaint
path if File.directory? path
end
private :find_full_gem_path
##
# The full path to the gem (install path + full name).
def full_gem_path
# TODO: This is a heavily used method by gems, so we'll need
# to aleast just alias it to #gem_dir rather than remove it.
@full_gem_path ||= find_full_gem_path
end
##
# Returns the full name (name-version) of this Gem. Platform information
# is included (name-version-platform) if it is specified and not the
# default Ruby platform.
def full_name
if platform == Gem::Platform::RUBY or platform.nil? then
"#{name}-#{version}".untaint
else
"#{name}-#{version}-#{platform}".untaint
end
end
##
# Returns the full path to the gems directory containing this spec's
# gem directory. eg: /usr/local/lib/ruby/1.8/gems
def gems_dir
# TODO: this logic seems terribly broken, but tests fail if just base_dir
@gems_dir ||= File.join(loaded_from && base_dir || Gem.dir, "gems")
end
##
# Set the path the Specification was loaded from. +path+ is converted to a
# String.
def loaded_from= path
@loaded_from = path && path.to_s
@full_gem_path = nil
@gems_dir = nil
@base_dir = nil
end
##
# Name of the gem
def name
raise NotImplementedError
end
##
# Platform of the gem
def platform
raise NotImplementedError
end
##
# Require paths of the gem
def require_paths
raise NotImplementedError
end
##
# Return a Gem::Specification from this gem
def to_spec
raise NotImplementedError
end
##
# Version of the gem
def version
raise NotImplementedError
end
end
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