Class: Xlogin::CLI

Inherits:
Object
  • Object
show all
Defined in:
lib/xlogin/cli.rb

Constant Summary collapse

DEFAULT_INVENTORY_FILE = 
File.join(ENV['HOME'], '.xloginrc')
DEFAULT_TEMPLATE_DIR = 
File.join(ENV['HOME'], '.xlogin.d')

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.getopts(args) ⇒ Object 



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# File 'lib/xlogin/cli.rb', line 21

def self.getopts(args)
  config = OpenStruct.new(
    jobs: 1,
    task: [:tty, nil],
    assume_yes:   false,
    inventory:    DEFAULT_INVENTORY_FILE,
    template_dir: DEFAULT_TEMPLATE_DIR,
  )

  parser = OptionParser.new
  parser.banner  = "#{File.basename($0)} HOST_PATTERN [Options]"
  parser.version = Xlogin::VERSION

  parser.on('-i PATH',        '--inventory',    String, 'The PATH to the inventory file (default: $HOME/.xloginrc).') { |v| config.inventory    = v }
  parser.on('-T PATH',        '--template',     String, 'The PATH to the template dir (default: $HOME/.xlogin.d).')   { |v| config.template_dir = v }
  parser.on('-L [DIRECTORY]', '--log-dir',      String, 'The PATH to the log dir (default: $PWD).')                   { |v| config.logdir = v || '.' }

  parser.on('-l', '--list', TrueClass, 'List the inventory.')     { |v| config.task = [:list, nil] }
  parser.on('-t', '--tty',  TrueClass, 'Allocate a pseudo-tty.')  { |v| config.task = [:tty,  nil] }
  parser.on('-e COMMAND', '--exec', 'Execute commands and quit.') { |v| config.task = [:exec, v] }

  parser.on('-j NUM', '--jobs', Integer, 'The NUM of jobs to execute in parallel(default: 1).') { |v| config.jobs = v }
  parser.on('-E',     '--enable',     TrueClass, 'Try to gain enable priviledge.')              { |v| config.enable = v }
  parser.on('-y',     '--assume-yes', TrueClass, 'Automatically answer yes to prompts.')        { |v| config.assume_yes = v }

  parser.parse!(args)
  Xlogin.configure do
    assume_yes(true)
    source(File.expand_path(config.inventory, ENV['PWD']))
    template(File.expand_path(config.template_dir, ENV['PWD']))
  end

  config.hosts = Xlogin.list(*args)
  raise "No host found: `#{args.join(', ')}`" if config.hosts.empty?

  return config
rescue => e
  $stderr.puts e, '', parser
  exit 1
end

.run(args = ARGV) ⇒ Object 



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# File 'lib/xlogin/cli.rb', line 15

def self.run(args = ARGV)
  config = getopts(args)
  client = Xlogin::CLI.new
  client.method(config.task.first).call(config)
end

Instance Method Details

#exec(config) ⇒ Object 



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# File 'lib/xlogin/cli.rb', line 86

def exec(config)
  Signal.trap(:INT) { exit 0 }

  max_width = config.hosts.map { |e| e[:name].length }.max
  Parallel.map(config.hosts, in_threads: config.jobs) do |hostinfo|
    session = nil
    error   = nil

    begin
      buffer   = StringIO.new

      loggers  = []
      loggers << ((config.jobs > 1)? buffer : $stdout)
      loggers << File.expand_path(File.join(config.logdir, "#{hostinfo[:name]}.log"), ENV['PWD']) if config.logdir

      session = Xlogin.get(hostinfo.merge(log: loggers))
      session.enable(hostinfo[:enable]) if config.enable && hostinfo[:enable]

      command_lines = ['', *config.task.last.to_s.split(';').map(&:strip)]
      command_lines.each { |line| session.cmd(line) }
    rescue => err
      error = err
    end

    if config.jobs > 1
      prefix = "#{hostinfo[:name].to_s.ljust(max_width)} |"
      output = buffer.string.lines.map { |line| prefix + line.chomp.gsub("\r", '') + "\n" }.join
      $stdout.print output
      $stderr.print prefix + "[Error] #{error}\n" if error
    else
      $stderr.print "[Error] #{error}\n" if error
    end

    session
  end
end

#list(config) ⇒ Object 



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# File 'lib/xlogin/cli.rb', line 62

def list(config)
  $stdout.puts config.hosts.map { |e| e[:name] }.sort.uniq
end

#tty(config) ⇒ Object 



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# File 'lib/xlogin/cli.rb', line 66

def tty(config)
  Signal.trap(:INT) { exit 0 }

  config.hosts.each do |hostinfo|
    unless config.hosts.size == 1
      case resp = Readline.readline(">> #{hostinfo[:name]}(Y/n)? ", false).strip
      when /^y(es)?$/i, ''
      when /^n(o)?$/i then next
      else redo
      end
    end

    $stdout.puts "Trying #{hostinfo[:name]}...", "Escape character is '^]'."
    tty_config = OpenStruct.new(config.to_h.merge(jobs: 1, hosts: [hostinfo]))

    session, _ = exec(tty_config)
    session.interact!
  end
end