Class: Morpheus::Terminal

Inherits:
Object
  • Object
show all
Defined in:
lib/morpheus/terminal.rb

Overview

Terminal is a class for executing morpheus commands The default IO is STDIN, STDOUT, STDERR The default home directory is $HOME/.morpheus

Example Usage

morph = Morpheus::Terminal.new
exit_code, err = morph.execute("instances list -m 10")
assert exit_code == 0
assert err == nil

morph = Morpheus::Terminal.new(STDIN, File.new("/tmp/morph.log", "w+"))
morph.execute("hosts get 23")

morph = Morpheus::Terminal.new(STDIN, File.new("/tmp/host23.json", "w"))
morph.execute("hosts get 23 --json")
puts File.read("/tmp/host23.json")

Defined Under Namespace

Classes: Blackhole

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(stdin = STDIN, stdout = STDOUT, stderr = STDERR, homedir = nil) ⇒ Terminal

Create a new instance of Morpheus::Terminal

Parameters:

  • stdin (IO) (defaults to: STDIN) —

    Default is STDIN

  • stdout (IO) (defaults to: STDOUT) —

    Default is STDOUT

  • stderr (IO) (defaults to: STDERR) —

    Default is STDERR

  • stderr (IO) (defaults to: STDERR) 


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# File 'lib/morpheus/terminal.rb', line 102

def initialize(stdin=STDIN,stdout=STDOUT, stderr=STDERR, homedir=nil)
  # todo: establish config context for executing commands, 
#       so you can run them in parallel within the same process
#       that means not using globals and class instance vars
#       just return an exit code / err, instead of raising SystemExit

  
  # establish IO
  # @stdin, @stdout, @stderr = stdin, stdout, stderr
  set_stdin(stdin)
  set_stdout(stdout)
  set_stderr(stderr)
  
  # establish home directory
  use_homedir = homedir || ENV['MORPHEUS_CLI_HOME'] || File.join(Dir.home, ".morpheus")
  set_home_directory(use_homedir)
  
  # use colors by default
  set_coloring(STDOUT.isatty)
  # Term::ANSIColor::coloring = STDOUT.isatty
  # @coloring = Term::ANSIColor::coloring?

  # startup script
  if File.exists? Morpheus::Cli::DotFile.morpheus_profile_filename
    @profile_dot_file = Morpheus::Cli::DotFile.new(Morpheus::Cli::DotFile.morpheus_profile_filename)
  else
    @profile_dot_file = nil
  end
  
  # the string to prompt for input with
  @prompt ||= Morpheus::Terminal.prompt
  @angry_prompt ||= Morpheus::Terminal.angry_prompt
end

Instance Attribute Details

#home_directory ⇒ Object (readonly)

Returns the value of attribute home_directory.



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# File 'lib/morpheus/terminal.rb', line 93

def home_directory
  @home_directory
end

#prompt ⇒ Object

, :angry_prompt



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# File 'lib/morpheus/terminal.rb', line 92

def prompt
  @prompt
end

#stderr ⇒ Object (readonly)

Returns the value of attribute stderr.



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# File 'lib/morpheus/terminal.rb', line 93

def stderr
  @stderr
end

#stdin ⇒ Object (readonly)

Returns the value of attribute stdin.



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# File 'lib/morpheus/terminal.rb', line 93

def stdin
  @stdin
end

#stdout ⇒ Object (readonly)

Returns the value of attribute stdout.



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# File 'lib/morpheus/terminal.rb', line 93

def stdout
  @stdout
end

Class Method Details

.angry_prompt ⇒ Object 



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# File 'lib/morpheus/terminal.rb', line 71

def self.angry_prompt
  "#{Term::ANSIColor.red}morpheus:#{Term::ANSIColor.reset} "
end

.custom_prompt ⇒ Object 



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# File 'lib/morpheus/terminal.rb', line 75

def self.custom_prompt
  #export MORPHEUS_PS1='\[\e[1;32m\]\u@\h:\w${text}$\[\e[m\] '
end

.default_color ⇒ Object

DEFAULT_TERMINAL_WIDTH = 80



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# File 'lib/morpheus/terminal.rb', line 51

def self.default_color
  Term::ANSIColor.cyan
end

.instance ⇒ Object

the global Morpheus::Terminal instance This should go away, but it needed for now…



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# File 'lib/morpheus/terminal.rb', line 81

def self.instance
  @morphterm
end

.new(*args) ⇒ Object

hack alert! This should go away, but it needed for now…



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# File 'lib/morpheus/terminal.rb', line 86

def self.new(*args)
  obj = super(*args)
  @morphterm = obj
  obj
end

.prompt ⇒ Object 



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# File 'lib/morpheus/terminal.rb', line 55

def self.prompt
  if @prompt.nil?
    if ENV['MORPHEUS_PS1']
      @prompt = ENV['MORPHEUS_PS1'].dup
    else
      #ENV['MORPHEUS_PS1'] = "#{Term::ANSIColor.cyan}morpheus>#{Term::ANSIColor.reset} "
      @prompt = "#{Term::ANSIColor.cyan}morpheus>#{Term::ANSIColor.reset} "
    end
  end
  @prompt
end

.prompt=(v) ⇒ Object 



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# File 'lib/morpheus/terminal.rb', line 67

def self.prompt=(v)
  @prompt = v
end

Instance Method Details

#angry_prompt ⇒ Object 



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# File 'lib/morpheus/terminal.rb', line 254

def angry_prompt
  @angry_prompt ||= Morpheus::Terminal.angry_prompt
end

#coloring? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/morpheus/terminal.rb', line 201

def coloring?
  @coloring == true
end

#execute(input) ⇒ Object

protected



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# File 'lib/morpheus/terminal.rb', line 280

def execute(input)
  exit_code = 0
  err = nil
  args = nil
  if input.is_a? String
    args = Shellwords.shellsplit(input)
  elsif input.is_a?(Array)
    args = input.dup
  else
    raise "terminal execute() expects a String to be split or an Array of String arguments and instead got (#{args.class}) #{args}"
  end

  # include Term::ANSIColor # tempting

  # short circuit version switch
  if args.length == 1
    if args[0] == '-v' || args[0] == '--version'
      @stdout.puts Morpheus::Cli::VERSION
      return 0, nil
    end
  end

  # looking for global help?
  if args.length == 1
    if args[0] == '-h' || args[0] == '--help' || args[0] == 'help'
      @stdout.puts usage
      return 0, nil
    end
  end
  

  # process global options

  # raise log level right away
  if args.find {|it| it == '-V' || it == '--debug'}
    @terminal_log_level = Morpheus::Logging::Logger::DEBUG
    Morpheus::Logging.set_log_level(Morpheus::Logging::Logger::DEBUG)
    ::RestClient.log = Morpheus::Logging.debug? ? Morpheus::Logging::DarkPrinter.instance : nil
  end

  # execute startup script .morpheus_profile  unless --noprofile is passed
  # todo: this should happen in initialize..
  noprofile = false
  if args.find {|it| it == '--noprofile' }
    noprofile = true
    args.delete_if {|it| it == '--noprofile' }
  end

  if @profile_dot_file && !@profile_dot_file_has_run
    if !noprofile && File.exists?(@profile_dot_file.filename)
      execute_profile_script()
    end
  end

  # not enough arguments?
  if args.count == 0
    @stderr.puts "#{@angry_prompt}[command] argument is required."
    #@stderr.puts "No command given, here's some help:"
    @stderr.print usage
    return 2, nil # CommandError.new("morpheus requires a command")
  end
  
  cmd_name = args[0]
  cmd_args = args[1..-1]

  # unknown command?
  # all commands should be registered commands or aliases
  if !(Morpheus::Cli::CliRegistry.has_command?(cmd_name) || Morpheus::Cli::CliRegistry.has_alias?(cmd_name))
    @stderr.puts "#{@angry_prompt}'#{cmd_name}' is not a morpheus command. See 'morpheus --help'."
    #@stderr.puts usage
    return 127, nil
  end

  # ok, execute the command (or alias)
  result = nil
  begin
    # shell is a Singleton command class
    if args[0] == "shell"
      result = Morpheus::Cli::Shell.instance.handle(args[1..-1])
    else
      result = Morpheus::Cli::CliRegistry.exec(args[0], args[1..-1])
    end
    # todo: clean up CliCommand return values, handle a few diff types for now
    if result == nil || result == true || result == 0
      exit_code = 0
    elsif result == false
      exit_code = 1
    elsif result.is_a?(Array) # exit_code, err
      exit_code = result[0] #.to_i
      err = result[1]
    else
      exit_code = result #.to_i
    end
  rescue => e
    exit_code = Morpheus::Cli::ErrorHandler.new(@stderr).handle_error(e)
    err = e
  end

  return exit_code, err

end

#execute_profile_script(rerun = false) ⇒ Object

execute .morpheus_profile startup script



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# File 'lib/morpheus/terminal.rb', line 137

def execute_profile_script(rerun=false)
  if @profile_dot_file
    if rerun || !@profile_dot_file_has_run
      @profile_dot_file_has_run = true
      return @profile_dot_file.execute() # todo: pass io in here
    else
      return false # already run
    end
  else
    return nil
  end
end

#set_coloring(enabled) ⇒ Object

def coloring=(v)

set_coloring(enabled)

end



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# File 'lib/morpheus/terminal.rb', line 195

def set_coloring(enabled)
  @coloring = !!enabled
  Term::ANSIColor::coloring = @coloring
  coloring?
end

#set_home_directory(homedir) ⇒ Object 



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# File 'lib/morpheus/terminal.rb', line 177

def set_home_directory(homedir)
  full_homedir = File.expand_path(homedir)
  # if !Dir.exists?(full_homedir)
  #   print_red_alert "Directory not found: #{full_homedir}"
  #   exit 1
  # end
  @home_directory = full_homedir
  
  # todo: deprecate this
  Morpheus::Cli.home_directory = full_homedir

  @home_directory
end

#set_stderr(io) ⇒ Object 



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# File 'lib/morpheus/terminal.rb', line 168

def set_stderr(io)
  if io.nil? || io == 'blackhole' || io == '/dev/null'
    @stderr = Morpheus::Terminal::Blackhole.new
  else
    @stderr = io
  end
  @stderr
end

#set_stdin(io) ⇒ Object 



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# File 'lib/morpheus/terminal.rb', line 150

def set_stdin(io)
  # if io.nil? || io == 'blackhole' || io == '/dev/null'
  #   @stdout = Morpheus::Terminal::Blackhole.new
  # else
  #   @stdout = io
  # end
  @stdin = io
end

#set_stdout(io) ⇒ Object 



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# File 'lib/morpheus/terminal.rb', line 159

def set_stdout(io)
  if io.nil? || io == 'blackhole' || io == '/dev/null'
    @stdout = Morpheus::Terminal::Blackhole.new
  else
    @stdout = io
  end
  @stdout
end

#usage ⇒ Object

alias :‘coloring=’ :set_coloring



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# File 'lib/morpheus/terminal.rb', line 207

def usage
  out = "Usage: morpheus [command] [options]\n"
  # just for printing help. todo: start using this. maybe in class Cli::MainCommand
  # maybe OptionParser's recover() instance method will do the trick
  optparse = Morpheus::Cli::OptionParser.new do|opts|
    opts.banner = "Options:" # hack alert
    opts.on('-v','--version', "Print the version.") do
      @stdout.puts Morpheus::Cli::VERSION
      # exit
    end
    opts.on('--noprofile','--noprofile', "Do not read and execute the personal initialization script .morpheus_profile") do
      @noprofile = true
    end
    opts.on('-C','--nocolor', "Disable ANSI coloring") do
      @coloring = false
      Term::ANSIColor::coloring = false
    end
    opts.on('-V','--debug', "Print extra output for debugging.") do |json|
      @terminal_log_level = Morpheus::Logging::Logger::DEBUG
      Morpheus::Logging.set_log_level(Morpheus::Logging::Logger::DEBUG)
      ::RestClient.log = Morpheus::Logging.debug? ? Morpheus::Logging::DarkPrinter.instance : nil
    end
    opts.on( '-h', '--help', "Prints this help" ) do
      @stdout.puts opts
      # exit
    end
  end
  out << "Commands:\n"
  Morpheus::Cli::CliRegistry.all.keys.sort.each {|cmd|
    out << "\t#{cmd.to_s}\n"
  }
  # out << "Options:\n"
  out << optparse.to_s
  out << "\n"
  out << "For more information, see https://github.com/gomorpheus/morpheus-cli/wiki"
  out << "\n"
  out
end