Class: PVN::App::Runner

Inherits:
Object
  • Object
show all
Includes:
Loggable
Defined in:
lib/pvn/app/runner.rb

Constant Summary collapse

SUBCOMMANDS = 
[ PVN::Log::Command,
  PVN::Pct::Command,
  PVN::Status::Command,
  PVN::Diff::Command,
  # DescribeCommand, 
  # WhereCommand,
  # UndeleteCommand,
]

Instance Method Summary collapse

Constructor Details

#initialize(io, args) ⇒ Runner

Returns a new instance of Runner.



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# File 'lib/pvn/app/runner.rb', line 39

def initialize io, args
  RIEL::Log.level = RIEL::Log::WARN
  RIEL::Log.set_widths(-25, 5, -35)

  if args.empty?
    run_help args
  end
  
  while args.size > 0
    arg = args.shift
    info "arg: #{arg}"

    case arg
    when "--verbose"
      RIEL::Log.level = RIEL::Log::DEBUG
    when "help", "--help", "-h"
      run_help args
    else
      SUBCOMMANDS.each do |sc|
        if sc.matches_subcommand? arg
          # run command actually exits, but this makes it clearer
          return run_command sc, args
        end
      end
      $stderr.puts "ERROR: subcommand not valid: #{arg}"
      exit(-1)
    end
  end

  run_help args
end

Instance Method Details

#run_command(cmdcls, args) ⇒ Object 



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# File 'lib/pvn/app/runner.rb', line 71

def run_command cmdcls, args
  begin
    cmdcls.new args
    exit(0)
  rescue => e
    puts e.backtrace
    $stderr.puts e
    exit(-1)
  end
end

#run_help(args) ⇒ Object 



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# File 'lib/pvn/app/runner.rb', line 82

def run_help args
  forwhat = args[0]

  cls = SUBCOMMANDS.find do |cls|
    cls.getdoc.subcommands.include? forwhat
  end

  if cls
    cls.to_doc
  else
    puts "usage: pvn [--verbose] <command> [<options>] [<args>]"
    puts "PVN, version #{PVN::VERSION}"
    puts
    puts "PVN has the subcommands:"
    SUBCOMMANDS.each do |sc|
      printf "   %-10s %s\n", sc.getdoc.subcommands[0], sc.getdoc.description
    end
  end
  exit(0)
end