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require 'requirement'
require 'extend/set'
class X11Dependency < Requirement
include Comparable
attr_reader :min_version
fatal true
env { ENV.x11 }
def initialize(name="x11", tags=[])
@name = name
@min_version = tags.shift if /(\d\.)+\d/ === tags.first
super(tags)
end
satisfy :build_env => false do
MacOS::XQuartz.installed? && (@min_version.nil? || @min_version <= MacOS::XQuartz.version)
end
def message; <<-EOS.undent
Unsatisfied dependency: XQuartz #{@min_version}
Homebrew does not package XQuartz. Installers may be found at:
https://xquartz.macosforge.org
EOS
end
def <=> other
unless other.is_a? X11Dependency
raise TypeError, "expected X11Dependency"
end
if min_version.nil? && other.min_version.nil?
0
elsif other.min_version.nil?
1
elsif @min_version.nil?
-1
else
@min_version <=> other.min_version
end
end
# When X11Dependency is subclassed, the new class should
# also inherit the information specified in the DSL above.
def self.inherited(mod)
instance_variables.each do |ivar|
mod.instance_variable_set(ivar, instance_variable_get(ivar))
end
end
# X11Dependency::Proxy is a base class for the X11 pseudo-deps.
# Rather than instantiate it directly, a separate class is built
# for each of the packages that we proxy to X11Dependency.
class Proxy < self
PACKAGES = [:libpng, :freetype, :fontconfig]
class << self
def defines_const?(const)
if ::RUBY_VERSION >= "1.9"
const_defined?(const, false)
else
const_defined?(const)
end
end
def for(name, tags=[])
constant = name.capitalize
if defines_const?(constant)
klass = const_get(constant)
else
klass = Class.new(self) do
def initialize(name, tags) super end
end
const_set(constant, klass)
end
klass.new(name, tags)
end
end
end
end
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