Class: RVC::Shell

Inherits:
Object
  • Object
show all
Defined in:
lib/rvc/shell.rb

Constant Summary collapse

BULTIN_MODULE_PATH = 
[File.expand_path(File.join(File.dirname(__FILE__), 'modules')),
File.join(ENV['HOME'], ".rvc")]
ENV_MODULE_PATH = 
(ENV['RVC_MODULE_PATH'] || '').split ':'

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Shell

Returns a new instance of Shell.



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# File 'lib/rvc/shell.rb', line 33

def initialize
  @persist_ruby = false
  @fs = RVC::FS.new RVC::RootNode.new(self)
  @ruby_evaluator = RVC::RubyEvaluator.new self
  @completion = RVC::Completion.new self
  @connection = NullConnection.new
  @connections = { '' => @connection }
  @debug = false
  @cmds = nil
end

Instance Attribute Details

#cmds ⇒ Object

Returns the value of attribute cmds.



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# File 'lib/rvc/shell.rb', line 31

def cmds
  @cmds
end

#completion ⇒ Object (readonly)

Returns the value of attribute completion.



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# File 'lib/rvc/shell.rb', line 29

def completion
  @completion
end

#connection ⇒ Object (readonly)

Returns the value of attribute connection.



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# File 'lib/rvc/shell.rb', line 30

def connection
  @connection
end

#connections ⇒ Object (readonly)

Returns the value of attribute connections.



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# File 'lib/rvc/shell.rb', line 30

def connections
  @connections
end

#debug ⇒ Object

Returns the value of attribute debug.



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# File 'lib/rvc/shell.rb', line 31

def debug
  @debug
end

#fs ⇒ Object (readonly)

Returns the value of attribute fs.



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# File 'lib/rvc/shell.rb', line 29

def fs
  @fs
end

Class Method Details

.parse_input(input) ⇒ Object 



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# File 'lib/rvc/shell.rb', line 97

def self.parse_input input
  begin
    cmdpath, *args = Shellwords.shellwords(input)
  rescue ArgumentError # unmatched double quote
    cmdpath, *args = Shellwords.shellwords(input + '"')
  end
  return nil unless cmdpath
  cmdpath = cmdpath.split('.').map(&:to_sym)
  [cmdpath, args]
end

Instance Method Details

#eval_command(input) ⇒ Object 



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# File 'lib/rvc/shell.rb', line 108

def eval_command input
  cmdpath, args = Shell.parse_input input

  RVC::Util.err "invalid input" unless cmdpath

  cmd = cmds.lookup cmdpath
  RVC::Util.err "invalid command" unless cmd

  begin
    args, opts = cmd.parser.parse args
  rescue Trollop::HelpNeeded
    cmd.parser.educate
    return
  end

  if cmd.parser.has_options?
    cmd.invoke *(args + [opts])
  else
    cmd.invoke *args
  end
end

#eval_input(input) ⇒ Object 



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# File 'lib/rvc/shell.rb', line 52

def eval_input input
  if input == '//'
    @persist_ruby = !@persist_ruby
    return
  end

  if input[0..0] == '!'
    RVC::Util.system_fg input[1..-1]
    return
  end

  ruby = @persist_ruby
  if input =~ /^\//
    input = $'
    ruby = !ruby
  end

  begin
    if ruby
      eval_ruby input
    else
      eval_command input
    end
  rescue SystemExit, IOError
    raise
  rescue RVC::Util::UserError, RuntimeError, RbVmomi::Fault, Trollop::CommandlineError
    if ruby or debug
      puts "#{$!.class}: #{$!.message}"
      puts $!.backtrace * "\n"
    else
      case $!
      when RbVmomi::Fault, RVC::Util::UserError
        puts $!.message
      else
        puts "#{$!.class}: #{$!.message}"
      end
    end
  rescue Exception
    puts "#{$!.class}: #{$!.message}"
    puts $!.backtrace * "\n"
  ensure
    $stdout.flush
  end
end

#eval_ruby(input, file = "<input>") ⇒ Object 



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# File 'lib/rvc/shell.rb', line 130

def eval_ruby input, file="<input>"
  result = @ruby_evaluator.do_eval input, file
  if $interactive
    if input =~ /\#$/
      if result.is_a? Class
        introspect_class result
      else
        introspect_object result
      end
    else
      pp result
    end
  end
end

#inspect ⇒ Object 



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# File 'lib/rvc/shell.rb', line 48

def inspect
  "#<RVC::Shell:#{object_id}>"
end

#introspect_class(klass) ⇒ Object 



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# File 'lib/rvc/shell.rb', line 178

def introspect_class klass
  q = lambda { |x| x =~ /^xsd:/ ? $' : x }
  if klass < RbVmomi::VIM::DataObject
    puts "Data Object #{klass}"
    klass.full_props_desc.each do |desc|
      puts " #{desc['name']}: #{q[desc['wsdl_type']]}#{desc['is-array'] ? '[]' : ''}"
    end
  elsif klass < RbVmomi::VIM::ManagedObject
    puts "Managed Object #{klass}"
    puts
    puts "Properties:"
    klass.full_props_desc.each do |desc|
      puts " #{desc['name']}: #{q[desc['wsdl_type']]}#{desc['is-array'] ? '[]' : ''}"
    end
    puts
    puts "Methods:"
    klass.full_methods_desc.sort_by(&:first).each do |name,desc|
      params = desc['params']
      puts " #{name}(#{params.map { |x| "#{x['name']} : #{q[x['wsdl_type'] || 'void']}#{x['is-array'] ? '[]' : ''}" } * ', '}) : #{q[desc['result']['wsdl_type'] || 'void']}"
    end
  else
    puts "#{klass} < #{klass.superclass}"
    puts
    methods_by_class = klass.instance_methods.map { |x| klass.instance_method(x) }.group_by { |m| m.owner }
    klass.ancestors.each do |ancestor|
      break if ancestor == Object
      if ancestor == klass
        puts "Methods:"
      else
        puts "Methods from #{ancestor}:"
      end
      methods_by_class[ancestor].sort_by { |m| m.name }.each do |m|
        if m.respond_to? :parameters
          puts " #{m.name}(#{m.parameters.map { |mode,name| "#{name}#{mode==:opt ? '?' : ''}" } * ', '})"
        else
          puts " #{m.name}"
        end
      end
    end
  end
end

#introspect_object(obj) ⇒ Object 



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# File 'lib/rvc/shell.rb', line 153

def introspect_object obj
  case obj
  when RbVmomi::VIM::DataObject, RbVmomi::VIM::ManagedObject
    introspect_class obj.class
  when Array
    klasses = obj.map(&:class).uniq
    if klasses.size == 0
      puts "Array"
    elsif klasses.size == 1
      $stdout.write "Array of "
      introspect_class klasses[0]
    else
      counts = Hash.new 0
      obj.each { |o| counts[o.class] += 1 }
      puts "Array of:"
      counts.each { |k,c| puts "  #{k}: #{c}" }
      puts
      $stdout.write "Common ancestor: "
      introspect_class klasses.map(&:ancestors).inject(&:&)[0]
    end
  else
    introspect_class obj.class
  end
end

#prompt ⇒ Object 



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# File 'lib/rvc/shell.rb', line 145

def prompt
  if false
    "#{@fs.display_path}#{$terminal.color(@persist_ruby ? '~' : '>', :yellow)} "
  else
    "#{@fs.display_path}#{@persist_ruby ? '~' : '>'} "
  end
end

#reload_modules(verbose = true) ⇒ Object 



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# File 'lib/rvc/shell.rb', line 224

def reload_modules verbose=true
  @cmds = RVC::Namespace.new 'root', self, nil
  module_path = (BULTIN_MODULE_PATH+ENV_MODULE_PATH).select { |d| File.directory?(d) }
  module_path.each do |dir|
    @cmds.load_module_dir dir, verbose
  end
end

#switch_connection(name) ⇒ Object 



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# File 'lib/rvc/shell.rb', line 44

def switch_connection name
  @connection = @connections[name] || fail("no such connection")
end