#!/usr/bin/env ruby

# usage: tap [workflow] [--- tapfile] [-d-]
#
# workflow:
#   [break] [left:]right [ARGS...]   Constants are identified by matching the
#                                    left and right paths; all subsequent args
#   example:                         are passed to the constant. Breaks delimit
#   tap:load -> Tap::Tasks::Load     and the syntax repeats.
#
# breaks:
#   -                                Delimiter, separates object argvs
#   --                               Delimits argvs and enques the next object
#   -:[qai][.class]                  Sequence - joins previous and next objects
#   -/obj[/sig]                      Signal - enques signal with argv
#   --/obj[/sig]                     Signal - executes signal with argv
#   -@ obj                           Enque  - enques obj with argv
#   -! obj                           Execute - executes obj with argv
#   -. .-                            Escape begin/end
#   ---                              End workflow
#
# env:
#   TAP_GEMS                         Gem patterns to match and register
#   TAP_PATH                         Directory paths to register
#   TAPENV                           Signal files for env
#   TAPRC                            Signal files for app
#   TAPFILE                          Declaration files
#
# examples:
#   tap load str -: dump             A simple sequence workflow
#   tap load str - dump - join 0 1   Manually build the join
#   tap --/use debugger -d-          Debugging utilities
#   tap prompt                       Open a prompt
#   tap list                         List resources
#

require 'tap'
require 'tap/parser'

begin
  options = Tap.options
  
  if ARGV[-1] == '-d-'
    ARGV.pop
    options[:debug] = 'true'
  end
  
  if ARGV == ['--help']
    puts Lazydoc.usage(__FILE__)
    puts "\nversion #{Tap::VERSION} -- #{Tap::WEBSITE}"
    exit(0)
  end
  
  app = Tap.setup(options)
  parser = Tap::Parser.new
  
  loop do
    break if ARGV.empty?
    parser.parse!(ARGV)
    parser.build_to(app)
  
    break if ARGV.empty?
    config_parser = ConfigParser.new(app.config, 
      :option_break => Tap::Parser::BREAK, 
      :keep_break => true, 
      :clear_config => false, 
      :add_defaults => false)
    config_parser.add(app.class.configurations)
    
    config_parser.scan(ARGV) do |file|
      app.call('sig' => 'load', 'args' => [file])
    end
  end
  
  app.run
rescue
  if $DEBUG || options[:debug]
    raise $!
  end
  $stderr.puts $!.message
  exit(1)
end

exit(0)