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# OptionParser internal utility
class << OptionParser
def show_version(*pkg)
progname = ARGV.options.program_name
show = proc do |klass, version|
version = version.join(".") if Array === version
str = "#{progname}: #{klass} version #{version}"
if klass.const_defined?(:Release)
str << " (#{klass.const_get(:Release)})"
end
puts str
end
if pkg.size == 1 and pkg[0] == "all"
self.search_const(::Object, "Version", &show)
else
pkg.each do |pkg|
/\A[A-Z]\w*((::|\/)[A-Z]\w*)*\z/ni =~ pkg or next
begin
pkg = eval(pkg)
show.call(pkg, pkg.const_defined?(:Version) ? pkg.const_get(:Version) : "unknown")
rescue NameError
puts "#{progname}: #$!"
end
end
end
exit
end
def search_const(klass, name)
klasses = [klass]
while klass = klasses.shift
klass.constants.each do |cname|
klass.const_defined?(cname) or next
const = klass.const_get(cname)
yield klass, const if cname == name
klasses << const if Module === const and const != ::Object
end
end
end
end
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