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