Class: Kontena::Plugin::Shell::Session

Inherits:
Object
  • Object
show all
Defined in:
lib/kontena/plugin/shell/session.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(context) ⇒ Session

Returns a new instance of Session.



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# File 'lib/kontena/plugin/shell/session.rb', line 13

def initialize(context)
  @context = Context.new(context)
  read_history
end

Instance Attribute Details

#context ⇒ Object (readonly)

Returns the value of attribute context.



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# File 'lib/kontena/plugin/shell/session.rb', line 11

def context
  @context
end

Instance Method Details

#caret ⇒ Object 



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# File 'lib/kontena/plugin/shell/session.rb', line 95

def caret
  pastel.white('>')
end

#config ⇒ Object 



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# File 'lib/kontena/plugin/shell/session.rb', line 87

def config
  Kontena::Cli::Config
end

#grid_name ⇒ Object 



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# File 'lib/kontena/plugin/shell/session.rb', line 103

def grid_name
  config.current_grid ? pastel.green(config.current_grid) : pastel.red('<no grid>')
end

#history_file ⇒ Object 



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# File 'lib/kontena/plugin/shell/session.rb', line 18

def history_file
  ENV['KOSH_HISTORY'] || File.join(Dir.home, '.kosh_history')
end

#master_name ⇒ Object 



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# File 'lib/kontena/plugin/shell/session.rb', line 99

def master_name
  config.current_master ? pastel.green(config.current_master.name) : pastel.red('<no master>')
end

#pastel ⇒ Object 



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# File 'lib/kontena/plugin/shell/session.rb', line 83

def pastel
  Kontena.pastel
end

#prompt ⇒ Object 



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# File 'lib/kontena/plugin/shell/session.rb', line 91

def prompt
  "#{master_name}/#{grid_name} #{pastel.yellow(context)} #{caret} "
end

#read_history ⇒ Object 



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# File 'lib/kontena/plugin/shell/session.rb', line 22

def read_history
  File.readlines(history_file).each { |line| Readline::HISTORY.push(line.chomp) } if File.exist?(history_file)
end

#run ⇒ Object 



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# File 'lib/kontena/plugin/shell/session.rb', line 38

def run
  puts File.read(__FILE__)[/__END__$(.*)/m, 1]
  puts "Kontena Shell v#{Kontena::Plugin::Shell::VERSION} (c) 2017 Kontena"
  puts pastel.blue("Enter 'help' to see a list of commands or 'help <command>' to get help on a specific command.")

  stty_save = `stty -g`.chomp rescue nil
  at_exit do
    File.write(history_file, Readline::HISTORY.to_a.uniq.last(100).join("\n"))
    system('stty', stty_save) if stty_save
  end

  Readline.completion_proc = Proc.new do |word|
    line = Readline.line_buffer
    tokens = line.shellsplit
    tokens.pop unless word.empty?

    if context.empty? && tokens.empty?
      completions = Kontena::MainCommand.recognised_subcommands.flat_map(&:names) + Shell.commands.keys
    else
      command = Shell.command(context.first || tokens.first || 'kontena')
      if command
        if command.completions.first.respond_to?(:call)
          completions = command.completions.first.call(context, tokens, word)
        else
          completions = Array(command.completions)
        end
      else
        completions = []
      end
    end

    word.empty? ? completions : completions.select { |c| c.start_with?(word) }
  end

  while buf = Readline.readline(prompt, true)
    if buf.strip.empty?
      Readline::HISTORY.pop
    else
      run_command(buf)
    end
  end
  puts
  puts pastel.green("Bye!")
end

#run_command(buf) ⇒ Object 



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# File 'lib/kontena/plugin/shell/session.rb', line 26

def run_command(buf)
  tokens = buf.split(/\s(?=(?:[^"]|"[^"]*")*$)/).map(&:strip)
  runner = Shell.command(tokens.first) || Shell.command(context.first) || Kontena::Plugin::Shell::KontenaCommand
  command = runner.new(context, tokens, self)
  old_trap = trap('INT', Proc.new { Thread.main[:command_thread] && Thread.main[:command_thread].kill })
  Thread.main[:command_thread] = Thread.new do
    command.run
  end
  Thread.main[:command_thread].join
  trap('INT', old_trap)
end