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

.run(args = ARGV) ⇒ Object 



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# File 'lib/xlogin/cli.rb', line 13

def self.run(args = ARGV)
  Xlogin::CLI.new.run(args)
end

Instance Method Details

#exec(config) ⇒ Object 



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# File 'lib/xlogin/cli.rb', line 29

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

  jobs  = config[:jobs] || 1
  hosts = Xlogin.list(*config[:pattern])
  width = hosts.map { |e| e[:name].length }.max

  Parallel.map(hosts, in_threads: jobs) do |info|
    buffer  = StringIO.new
    prefix  = "#{info[:name].to_s.ljust(width)} |"
    session = nil

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

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

      command_lines = ['', *config[:exec].to_s.split(';').map(&:strip)]
      command_lines.each { |line| session.cmd(line) }

      buffer.string.lines.each { |line| $stdout.print prefix + line.gsub("\r", '') } if jobs > 1
    rescue => e
      buffer.string.lines.each { |line| $stdout.print prefix + line.gsub("\r", '') } if jobs > 1
      raise e
    end

    session
  end
end

#list(config) ⇒ Object 



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# File 'lib/xlogin/cli.rb', line 17

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

#run(args) ⇒ Object 



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

def run(args)
  config = Hash.new
  config[:runner]    = self.method(:tty)
  config[:inventory] = DEFAULT_INVENTORY_FILE
  config[:templates] = 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).')
  parser.on('-T PATH',        '--template',     String, 'The PATH to the template dir (default: $HOME/.xlogin.d).')
  parser.on('-L [DIRECTORY]', '--log-dir',      String, 'The PATH to the log dir (default: $PWD).') { |v| v || '.' }

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

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

  parser.parse!(args, into: config)
  config[:pattern] = args

  Xlogin.configure do
    set      assume_yes: true if config[:assume_yes]
    source   File.expand_path(config[:inventory], ENV['PWD'])
    template File.expand_path(config[:templates], ENV['PWD'])
  end
  raise "No host found: `#{args.join(', ')}`" if Xlogin.list(*config[:pattern]).empty?

  config[:runner].call(config)
rescue => e
  $stderr.puts e, '', parser
  exit 1
end

#tty(config) ⇒ Object 



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

def tty(config)
  info = Xlogin.list(*config[:pattern]).first
  $stdout.puts "Trying #{info[:name]}...", "Escape character is '^]'."

  session, _ = exec(config.merge(jobs: 1))
  session.interact!
end