31 lines
731 B
Ruby
31 lines
731 B
Ruby
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class EmacsRequirement < Requirement
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fatal true
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default_formula "emacs"
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def initialize(tags)
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@version = tags.shift if /\d+\.*\d*/ === tags.first
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raise "Specify a version for EmacsRequirement" unless @version
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super
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end
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satisfy :build_env => false do
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next unless which "emacs"
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emacs_version = Utils.popen_read("emacs", "--batch", "--eval", "(princ emacs-version)")
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Version.new(emacs_version) >= Version.new(@version)
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end
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env do
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ENV.prepend_path "PATH", which("emacs").dirname
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end
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def message
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s = "Emacs #{@version} or later is required."
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s += super
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s
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end
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def inspect
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"#<#{self.class.name}: #{name.inspect} #{tags.inspect} version=#{@version.inspect}>"
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end
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end
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