Class: Morpheus::Terminal

Inherits:
Object
  • Object
show all
Includes:
Benchmarking::HasBenchmarking
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

require 'morpheus/terminal'

# Write output to STDOUT is the default behavior

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

# Write command output to a file instead
terminal = Morpheus::Terminal.new(stdout: File.new("morpheus-terminal.log", "w+"))
terminal.execute("version")
terminal.execute("instances list")
terminal.execute("apps list")

# Overwrite file with output of a command
terminal = Morpheus::Terminal.new(stdout: File.new("instance23.json", "w"))
terminal.execute("instances get 23 --json")
puts "Instance 23 Details: ", File.read("instance23.json")

Defined Under Namespace

Classes: Blackhole

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Benchmarking::HasBenchmarking

#start_benchmark, #stop_benchmark, #with_benchmark

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 117

def initialize(stdin=STDIN,stdout=STDOUT, stderr=STDERR, homedir=nil)
  attrs = {}
  if stdin.is_a?(Hash)
    attrs = stdin.clone()
    stdin = attrs[:stdin] || STDIN
    stdout = attrs[:stdout] || STDOUT
    stderr = attrs[:stderr] || STDERR
    homedir = attrs[:homedir] || attrs[:home] || attrs[:home_directory]
  end
  # 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

#benchmarkingObject

Returns the value of attribute benchmarking.



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# File 'lib/morpheus/terminal.rb', line 107

def benchmarking
  @benchmarking
end

#home_directoryObject

Returns the value of attribute home_directory.



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# File 'lib/morpheus/terminal.rb', line 108

def home_directory
  @home_directory
end

#promptObject

, :angry_prompt



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# File 'lib/morpheus/terminal.rb', line 106

def prompt
  @prompt
end

#stderrObject (readonly)

Returns the value of attribute stderr.



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# File 'lib/morpheus/terminal.rb', line 108

def stderr
  @stderr
end

#stdinObject (readonly)

Returns the value of attribute stdin.



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# File 'lib/morpheus/terminal.rb', line 108

def stdin
  @stdin
end

#stdoutObject (readonly)

Returns the value of attribute stdout.



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# File 'lib/morpheus/terminal.rb', line 108

def stdout
  @stdout
end

Class Method Details

.angry_promptObject



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

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

.custom_promptObject



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# File 'lib/morpheus/terminal.rb', line 85

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

.default_colorObject

DEFAULT_TERMINAL_WIDTH = 80



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# File 'lib/morpheus/terminal.rb', line 61

def self.default_color
  Term::ANSIColor.cyan
end

.instanceObject

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



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# File 'lib/morpheus/terminal.rb', line 95

def self.instance
  @morphterm # ||= self.new({})
end

.new(*args) ⇒ Object

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



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# File 'lib/morpheus/terminal.rb', line 100

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

.promptObject



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# File 'lib/morpheus/terminal.rb', line 65

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 77

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

Instance Method Details

#angry_promptObject



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# File 'lib/morpheus/terminal.rb', line 311

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

#coloring?Boolean

Returns:

  • (Boolean)


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# File 'lib/morpheus/terminal.rb', line 230

def coloring?
  @coloring == true
end

#execute(input) ⇒ Object

protected



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# File 'lib/morpheus/terminal.rb', line 337

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

  # start benchmark right away?
  # if args.find {|it| it == '-B' || it == '--benchmark'}
  #   #start_benchmark(args.join(' '))
  #   @benchmarking = true
  # end

  # ok, execute the command (or alias)
  result = nil
  begin
    
    # todo: no, this needs to be supported as --home for every darn command..
    # add it to CliCommand build_common_options()
    # use custom home directory from --home
    # todo: this should happen in initialize..
    # @use_home_directory
    # need to get index, and delete both the switch and the arg after it
    homedir = false
    home_switch_index = args.index {|it| it == '--home' }
    if args.find {|it| it == '--home' }
      deleted_option = args.delete_at(home_switch_index)
      home_dir = args.delete_at(home_switch_index)
      @use_home_directory = home_dir
      #puts "Setting home directory to #{@use_home_directory}"
      set_home_directory(@use_home_directory)
      # re-initialize some variables
      # 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
    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

    # execute startup script .morpheus_profile  unless --noprofile is passed
    # todo: this should happen in initialize..
    @execute_mode = false
    @execute_mode_command = nil
    args.size.times do |i|
      if args[i] == '-e' || args[i] == '--exec'
        @execute_mode = true
        # delete switch and value (command)
        deleted_option = args.delete_at(i)
        @execute_mode_command = args.delete_at(i)
        if @execute_mode_command.nil?
          raise ::OptionParser::MissingArgument.new(deleted_option)
          #@stderr.puts "#{@angry_prompt}missing argument: #{deleted_option}."
          #@stderr.puts "No command given, here's some help:"
          #@stderr.print usage
          return 1
        end
        break
      end
    end

    if @execute_mode_command
      # execute a single command and exit
      result = Morpheus::Cli::CliRegistry.exec_expression(@execute_mode_command)
      @execute_mode_command = nil
    else
      # 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 1, nil # CommandError.new("morpheus requires a command")
      end
      
      cmd_name, *cmd_args = args

      formatted_cmd = args.collect {|arg| arg.include?(' ') ? "\"#{arg}\"" : "#{arg}" }.join(" ")

      # unknown command?
      # all commands should be registered commands or aliases
      # ahh, but it could support expressions (), use -e for that ..
      # if !(Morpheus::Cli::CliRegistry.has_command?(cmd_name) || Morpheus::Cli::CliRegistry.has_alias?(cmd_name))
      #   @stderr.puts "#{@angry_prompt}'#{cmd_name}' is not recognized"
      #   #@stderr.puts usage
      #   return 127, nil
      # end

      if @benchmarking || args.include?('-B') || args.include?('--benchmark')
        benchmark_name = "morpheus #{formatted_cmd}"
        benchmark_name.sub!(' -B', '')
        benchmark_name.sub!(' --benchmark', '')
        #benchmark_name << " -B"
        start_benchmark(benchmark_name)
      end

      # 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_expression(formatted_cmd)
        result = Morpheus::Cli::CliRegistry.exec(args[0], args[1..-1])
      end
    end
    exit_code, err = Morpheus::Cli::CliRegistry.parse_command_result(result)
  rescue => e
    exit_code, err = Morpheus::Cli::ErrorHandler.new(@stderr).handle_error(e)
  ensure
    # should always try to stop it
    # if @benchmarking
      benchmark_record = stop_benchmark(exit_code, err)
      Morpheus::Logging::DarkPrinter.puts(Term::ANSIColor.cyan + Term::ANSIColor.dark + benchmark_record.msg) if benchmark_record
    # end
  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 162

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

#inspectObject



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# File 'lib/morpheus/terminal.rb', line 157

def inspect
  to_s
end

#set_coloring(enabled) ⇒ Object

def coloring=(v)

set_coloring(enabled)

end



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# File 'lib/morpheus/terminal.rb', line 224

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 206

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 193

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 175

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 184

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

#to_sObject



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# File 'lib/morpheus/terminal.rb', line 153

def to_s
  "<##{self.class}:#{self.object_id.to_s(8)} @stdin=#{@stdin} @stdout=#{@base_url} @stderr=#{@stderr} @home=#{@home_directory} @prompt=#{@prompt} >"
end

#usageObject

alias :‘coloring=’ :set_coloring



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# File 'lib/morpheus/terminal.rb', line 236

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('-e','--exec EXPRESSION', "Execute the command(s) expression. This is an alternative to passing [command] [options]") do |val|
      @execute_mode = true
      @execute_mode_command = val
    end
    opts.on('--noprofile','--noprofile', "Do not read and execute the personal initialization script .morpheus_profile") do
      @noprofile = true
    end
    # todo: make these work
    # opts.on('--home','--home', "Morpheus client home directory, where configuration files are located. The default is MORPHEUS_CLI_HOME or HOME/.morpheus") do |val|
    #   @use_home_directory = val
    #   set_home_directory(@use_home_directory)
    #   # that it? all done...
    # end
    # opts.on('-Z','--temporary', "Temporary shell. Use a temporary shell with the current remote configuration, credentials and commands loaded. Configuration changes and command history will not be saved.") do
    #   @noprofile = true
    #   @temporary_shell_mode = true
    # end
    # opts.on('-z','--clean', "Clean shell. Use a temporary shell without any remote configuration, credentials or command history loaded.") do
    #   @noprofile = true
    #   @temporary_shell_mode = true
    #   @clean_shell_mode = true
    # end
    opts.on('-C','--nocolor', "Disable ANSI coloring") do
      @coloring = false
      Term::ANSIColor::coloring = false
    end
    opts.on('-B','--benchmark', "Print benchmark time after the command is finished.") do
      @benchmarking = true
      #Morpheus::Benchmarking.enabled = true
    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)
      # if !options[:quiet]
      ::RestClient.log = Morpheus::Logging.debug? ? Morpheus::Logging::DarkPrinter.instance : nil
    end
    opts.on('-v','--version', "Print the version.") do
      @stdout.puts Morpheus::Cli::VERSION
      # exit
    end
    opts.on( '-h', '--help', "Print this help" ) do
      @stdout.puts opts
      # exit
    end
  end
  out << "Commands:\n"
  sorted_commands = Morpheus::Cli::CliRegistry.all.values.sort { |x,y| x.command_name.to_s <=> y.command_name.to_s }
  sorted_commands.each {|cmd|
    # JD: not ready to show description yet, gotta finish filling in every command first
    # maybe change 'View and manage' to something more concise like 'Manage'
    # out << "\t#{cmd.command_name.to_s.ljust(28, ' ')} #{cmd.command_description}\n"
    out << "\t#{cmd.command_name.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