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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
build_extensions
suffixes = Gem.suffixes
full_require_paths.any? do |dir|
base = "#{dir}/#{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
##
# The directory the named +extension+ was installed into after being built.
#
# Usage:
#
# spec.extensions.each do |ext|
# puts spec.extension_install_dir ext
# end
def extension_install_dir
File.join base_dir, 'extensions', Gem::Platform.local.to_s,
Gem.extension_api_version, full_name
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
##
# Full paths in the gem to add to <code>$LOAD_PATH</code> when this gem is
# activated.
def full_require_paths
full_paths = @require_paths.map do |path|
File.join full_gem_path, path
end
full_paths << extension_install_dir unless @extensions.empty?
full_paths
end
##
# Returns the full path to this spec's gem directory.
# eg: /usr/local/lib/ruby/1.8/gems/mygem-1.0
def gem_dir
@gem_dir ||= File.expand_path File.join(gems_dir, full_name)
end
##
# Returns the full path to the gems directory containing this spec's
# gem directory. eg: /usr/local/lib/ruby/1.8/gems
def gems_dir
# TODO: this logic seems terribly broken, but tests fail if just base_dir
@gems_dir ||= File.join(loaded_from && base_dir || Gem.dir, "gems")
end
##
# Set the path the Specification was loaded from. +path+ is converted to a
# String.
def loaded_from= path
@loaded_from = path && path.to_s
@full_gem_path = nil
@gems_dir = nil
@base_dir = nil
end
##
# Name of the gem
def name
raise NotImplementedError
end
##
# Platform of the gem
def platform
raise NotImplementedError
end
##
# Paths in the gem to add to <code>$LOAD_PATH</code> when this gem is
# activated.
#
# See also #require_paths=
#
# If you have an extension you do not need to add <code>"ext"</code> to the
# require path, the extension build process will copy the extension files
# into "lib" for you.
#
# The default value is <code>"lib"</code>
#
# Usage:
#
# # If all library files are in the root directory...
# spec.require_path = '.'
def require_paths
return @require_paths if @extensions.empty?
relative_extension_install_dir =
File.join '..', '..', 'extensions', Gem::Platform.local.to_s,
Gem.extension_api_version, full_name
@require_paths + [relative_extension_install_dir]
end
##
# Return a Gem::Specification from this gem
def to_spec
raise NotImplementedError
end
##
# Version of the gem
def version
raise NotImplementedError
end
##
# Whether this specification is stubbed - i.e. we have information
# about the gem from a stub line, without having to evaluate the
# entire gemspec file.
def stubbed?
raise NotImplementedError
end
end
|
