зеркало из https://github.com/github/ruby.git
71 строка
2.0 KiB
Ruby
71 строка
2.0 KiB
Ruby
# OptionParser internal utility
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class << OptionParser
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def show_version(*pkgs)
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progname = ARGV.options.program_name
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result = false
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show = proc do |klass, cname, version|
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str = "#{progname}"
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unless klass == ::Object and cname == :VERSION
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version = version.join(".") if Array === version
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str << ": #{klass}" unless klass == Object
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str << " version #{version}"
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end
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[:Release, :RELEASE].find do |rel|
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if klass.const_defined?(rel)
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str << " (#{klass.const_get(rel)})"
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end
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end
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puts str
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result = true
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end
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if pkgs.size == 1 and pkgs[0] == "all"
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self.search_const(::Object, /\AV(?:ERSION|ersion)\z/) do |klass, cname, version|
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unless cname[1] == ?e and klass.const_defined?(:Version)
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show.call(klass, cname.intern, version)
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end
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end
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else
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pkgs.each do |pkg|
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begin
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pkg = pkg.split(/::|\//).inject(::Object) {|m, c| m.const_get(c)}
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v = case
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when pkg.const_defined?(:Version)
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pkg.const_get(n = :Version)
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when pkg.const_defined?(:VERSION)
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pkg.const_get(n = :VERSION)
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else
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n = nil
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"unknown"
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end
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show.call(pkg, n, v)
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rescue NameError
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end
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end
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end
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result
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end
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def each_const(path, base = ::Object)
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path.split(/::|\//).inject(base) do |klass, name|
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raise NameError, path unless Module === klass
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klass.constants.grep(/#{name}/i) do |c|
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klass.const_defined?(c) or next
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c = klass.const_get(c)
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end
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end
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end
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def search_const(klass, name)
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klasses = [klass]
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while klass = klasses.shift
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klass.constants.each do |cname|
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klass.const_defined?(cname) or next
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const = klass.const_get(cname)
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yield klass, cname, const if name === cname
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klasses << const if Module === const and const != ::Object
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end
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end
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end
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end
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