36 lines
795 B
Ruby
36 lines
795 B
Ruby
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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super
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end
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satisfy build_env: false do
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next false unless which "emacs"
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next true unless @version
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emacs_version = Utils.popen_read("emacs", "--batch", "--eval", "(princ emacs-version)")
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Version.create(emacs_version) >= Version.create(@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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ENV["EMACS"] = "emacs"
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end
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def message
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if @version
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s = "Emacs #{@version} or later is required."
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else
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s = "Emacs is required."
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end
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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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