generic.gemspec

Gem::Specification.new do |s|
  # totally generic
  version_file    = Dir['lib/*/{*/,}version.rb'].first
  s.name          = version_file.split('/')[1..-2].join('-')
  s.files         = `git ls-files`.split("\n")
  s.test_files    = `git ls-files -- {test,spec,features}/*`.split("\n")
  s.executables   = `git ls-files -- bin/*`.split("\n").map{ |f| File.basename(f) }
  s.authors       = `git shortlog -sn`.scan(/[^\d\s].*/)
  s.email         = `git shortlog -sne`.scan(/[^<]+@[^>]+/)
  s.require_paths = ["lib"]

  # generic, but you might want to change it
  github_user     = `git config github.user`.strip
  s.homepage      = "http://github.com/#{github_user}/#{s.name}"
  fail "`git config github.users` not set" if github_user.empty?

  # let's figure out the version
  wrapper = Module.new
  wrapper.module_eval File.read(version_file)
  wrapper.constants.map { |n| wrapper.const_get(n) }.each do |c|
    if c.const_defined? :VERSION
      s.version = c::VERSION
    elsif nested = c.constants.detect { |n| c.const_get(n).const_defined? :VERSION }
      s.version = nested::VERSION
    end
  end
end