# Need the package name, and whether to generate documentation.
PACKAGE = File.read(Dir.glob('{.,meta/}unixname{,.txt}', File::FNM_CASEFOLD).first).strip
GENERATE_RDOCS = true # package developer may need to deactivate

require 'optparse'
require 'rbconfig'

class SetupError < StandardError; end

#

module Setup

  #
  # CLI runner
  #

  def self.run_cli(task)
    opts = OptionParser.new

    opts.banner = "Usage: #{File.basename($0)} [options]"

    if task == 'config' or task == 'all'
      opts.separator ""
      opts.separator "Config options:"   
      Setup::ConfigTable::DESCRIPTIONS.each do |name, type, desc|
        opts.on("--#{name} #{type.to_s.upcase}", desc) do |val|
          ENV[name.to_s] = val.to_s
        end
      end
    end

    if task == 'install'
      opts.separator ""
      opts.separator "Install options:"

      opts.on("--prefix PATH", "Installation prefix") do |val|
        installer.install_prefix = val
      end
    end

    if task == 'test'
      opts.separator ""
      opts.separator "Install options:"

      opts.on("--runner TYPE", "Test runner (auto|console|gtk|gtk2|tk)") do |val|
        installer.config.testrunner = val
      end
    end

    # common options
    opts.separator ""
    opts.separator "General options:"

    opts.on("-q", "--quiet", "Silence output") do |val|
      installer.quiet = val
    end

    opts.on("--verbose", "Provide verbose output") do |val|
      installer.verbose = val
    end

    opts.on("-n", "--no-write", "Do not write to disk") do |val|
      installer.no_harm = !val
    end

    opts.on("--dryrun", "Same as --no-write") do |val|
      installer.no_harm = val
    end

    # common options
    opts.separator ""
    opts.separator "Inform options:"

    # Tail options (eg. commands in option form)
    opts.on_tail("-h", "--help", "display this help information") do
      puts Setup.help
      exit
    end

    opts.on_tail("--version", "Show version") do
      puts File.basename($0) + ' v' + Setup::Version.join('.')
      exit
    end

    opts.on_tail("--copyright", "Show copyright") do
      puts Setup::Copyright
      exit
    end

    begin
      opts.parse!(ARGV)
    rescue OptionParser::InvalidOption
      $stderr.puts $!.to_s.capitalize
      exit 1
    end

    begin
      installer.__send__("exec_#{task}")
    rescue SetupError
      raise if $DEBUG
      $stderr.puts $!.message
      $stderr.puts "Try 'ruby #{$0} --help' for detailed usage."
      exit 1
    end
  end

end