Class: Baptize::Application

Inherits:
Object
  • Object
show all
Defined in:
lib/baptize/application.rb

Overview

Most of this is copy-paste fom Rake::Application github.com/ruby/rake/blob/master/lib/rake/application.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Application

Returns a new instance of Application.



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# File 'lib/baptize/application.rb', line 33

def initialize
  @original_dir = Dir.pwd
  @bapfiles = %w(bapfile Bapfile bapfile.rb Bapfile.rb)
  @commands = {}
  Baptize.application = self
  load 'baptize/commands.rb'
end

Instance Attribute Details

#commands ⇒ Object

Returns the value of attribute commands.



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# File 'lib/baptize/application.rb', line 31

def commands
  @commands
end

Instance Method Details

#bapfile_location(backtrace = caller) ⇒ Object

:nodoc:



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# File 'lib/baptize/application.rb', line 148

def bapfile_location(backtrace=caller) # :nodoc:
  backtrace.map { |t| t[/([^:]+):/, 1] }

  re = /^#{@bapfile}$/
  re = /#{re.source}/i if windows?

  backtrace.find { |str| str =~ re } || ''
end

#define_command(name, description = nil, &block) ⇒ Object 



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# File 'lib/baptize/application.rb', line 49

def define_command(name, description=nil, &block)
  Command.new(name, description, &block).tap do |command|
    @commands[command.name] = command
  end
end

#dispatch ⇒ Object 



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# File 'lib/baptize/application.rb', line 94

def dispatch
  args = @arguments.dup
  command_name = args.shift&.to_sym
  fail "No command given. Try baptize --help" if command_name.nil?
  command = commands[command_name]
  fail "Invalid command #{command_name}" unless command
  command.invoke(*args)
end

#display_error_message(ex) ⇒ Object

Display the error message that caused the exception.



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# File 'lib/baptize/application.rb', line 173

def display_error_message(ex) # :nodoc:
  $stderr.puts "Error during processing: #{$!}"
  $stderr.puts ex.backtrace.join("\n\t")
end

#exit_because_of_exception(ex) ⇒ Object

Exit the program because of an unhandled exception. (may be overridden by subclasses)



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# File 'lib/baptize/application.rb', line 180

def exit_because_of_exception(ex) # :nodoc:
  exit(false)
end

#find_bapfile_location ⇒ Object

:nodoc:



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# File 'lib/baptize/application.rb', line 122

def find_bapfile_location # :nodoc:
  here = Dir.pwd
  until (fn = have_bapfile)
    Dir.chdir("..")
    return nil if Dir.pwd == here # || options.nosearch
    here = Dir.pwd
  end
  [fn, here]
ensure
  Dir.chdir(@original_dir)
end

#have_bapfile ⇒ Object

True if one of the files in BAPFILES is in the current directory. If a match is found, it is copied into @bapfile.



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# File 'lib/baptize/application.rb', line 136

def have_bapfile # :nodoc:
  @bapfiles.each do |fn|
    if File.exist?(fn)
      others = Dir.glob(fn, File::FNM_CASEFOLD).sort
      return others.size == 1 ? others.first : fn
    elsif fn == ''
      return fn
    end
  end
  return nil
end

#load_bapfile ⇒ Object 



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# File 'lib/baptize/application.rb', line 103

def load_bapfile
  standard_exception_handling do
    raw_load_bapfile
  end
end

#parse_input ⇒ Object 



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# File 'lib/baptize/application.rb', line 55

def parse_input
  @arguments = OptionParser.new do |opts|
    opts.banner = "baptize [OPTIONS] COMMAND"
    opts.separator ""
    opts.separator "COMMANDS are ..."

    width = [commands.values.map(&:name_with_parameters).map(&:length), 31].flatten.max
    commands.values.each do |command|
      opts.separator sprintf("    %-#{width}s  %s\n",
        command.name_with_parameters,
        command.description)
    end

    opts.separator ""
    opts.separator "OPTIONS are ..."

    opts.on_tail("-h", "--help", "-H", "Display this help message.") do
      puts opts
      exit
    end

    opts.on('--bapfile', '-f [FILENAME]', "Use FILENAME as the bapfile to search for.") do |value|
      value ||= ''
      @bapfiles.clear
      @bapfiles << value
    end

    opts.on('--verbose', '-v', "Log message to standard output.") do |value|
      Registry.execution_scope.set :verbose, true
    end

    opts.on('--version', '-V', "Display the program version.") do |value|
      puts "baptize, version #{Baptize::VERSION}"
      exit
    end

  end.parse(ARGV)
end

#print_bapfile_directory(location) ⇒ Object

:nodoc:



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# File 'lib/baptize/application.rb', line 118

def print_bapfile_directory(location) # :nodoc:
  $stderr.puts "(in #{Dir.pwd})" unless @original_dir == location
end

#raw_load_bapfile ⇒ Object

:nodoc:



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# File 'lib/baptize/application.rb', line 109

def raw_load_bapfile # :nodoc:
  bapfile, location = find_bapfile_location
  fail "No Bapfile found (looking for: #{@bapfiles.join(', ')})" if bapfile.nil?
  @bapfile = bapfile
  Dir.chdir(location)
  print_bapfile_directory(location)
  load(File.expand_path(@bapfile)) if @bapfile && @bapfile != ''
end

#run ⇒ Object 



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# File 'lib/baptize/application.rb', line 41

def run
  standard_exception_handling do
    parse_input
    load_bapfile
    dispatch
  end
end

#standard_exception_handling ⇒ Object

Provide standard exception handling for the given block.



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# File 'lib/baptize/application.rb', line 158

def standard_exception_handling # :nodoc:
  yield
rescue SystemExit
  # Exit silently with current status
  raise
rescue OptionParser::InvalidOption => ex
  $stderr.puts ex.message
  exit(false)
rescue Exception => ex
  # Exit with error message
  display_error_message(ex)
  exit_because_of_exception(ex)
end