65 lines
1.2 KiB
Ruby
65 lines
1.2 KiB
Ruby
class RubyRequirement < Requirement
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fatal true
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default_formula "ruby"
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def initialize(tags)
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@version = tags.shift if /(\d\.)+\d/ =~ tags.first
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raise "RubyRequirement requires a version!" unless @version
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super
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end
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satisfy(build_env: false) { suitable_ruby }
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env do
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ENV.prepend_path "PATH", suitable_ruby
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end
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def message
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s = "Ruby >= #{@version} is required to install this formula."
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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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def display_s
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if @version
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"#{name} >= #{@version}"
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else
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name
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end
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end
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private
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def suitable_ruby
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rubies.detect { |ruby| suitable?(ruby) }
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end
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def rubies
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rubies = which_all("ruby")
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if ruby_formula && ruby_formula.installed?
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rubies.unshift Pathname.new(ruby_formula.bin/"ruby")
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end
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rubies.uniq
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end
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def suitable?(ruby)
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version = Utils.popen_read(ruby, "-e", "print RUBY_VERSION").strip
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version =~ /^\d+\.\d+/ && Version.create(version) >= min_version
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end
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def min_version
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@min_version ||= Version.create(@version)
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end
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def ruby_formula
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@ruby_formula ||= Formula["ruby"]
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rescue FormulaUnavailableError
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nil
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end
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end
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