Class: Hotdog::Commands::Pssh

Inherits:
Search show all
Defined in:
lib/hotdog/commands/pssh.rb

Constant Summary

Constants inherited from BaseCommand

BaseCommand::MASK_DATABASE, BaseCommand::MASK_QUERY, BaseCommand::PERSISTENT_DB

Instance Attribute Summary

Attributes inherited from BaseCommand

#application, #logger, #options

Instance Method Summary collapse

Methods inherited from Search

#evaluate, #get_hosts_with_search_tags, #parse

Methods inherited from BaseCommand

#execute, #fixed_string?, #initialize, #reload

Constructor Details

This class inherits a constructor from Hotdog::Commands::BaseCommand

Instance Method Details

#run(args = []) ⇒ Object 



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# File 'lib/hotdog/commands/pssh.rb', line 12

def run(args=[])
  ssh_option = {
    options: [],
    user: nil,
    port: nil,
    identity_file: nil,
    max_parallelism: nil,
  }

  optparse.on("-o SSH_OPTION", "Passes this string to ssh command through shell. This option may be given multiple times") do |option|
    ssh_option[:options] += [option]
  end
  optparse.on("-i SSH_IDENTITY_FILE", "SSH identity file path") do |path|
    ssh_option[:identity_file] = path
  end
  optparse.on("-p PORT", "Port of the remote host", Integer) do |port|
    ssh_option[:port] = port
  end
  optparse.on("-u SSH_USER", "SSH login user name") do |user|
    ssh_option[:user] = user
  end
  optparse.on("-P PARALLELISM", "Max parallelism", Integer) do |n|
    ssh_option[:max_parallelism] = n
  end

  use_color = STDOUT.tty?

  search_args = []
  optparse.order!(args) {|search_arg| search_args.push(search_arg) }
  expression = search_args.join(" ").strip
  if expression.empty? || args.empty?
    exit(1)
  end

  begin
    node = parse(expression)
  rescue Parslet::ParseFailed => error
    STDERR.puts("syntax error: " + error.cause.ascii_tree)
    exit(1)
  end

  result = evaluate(node, self).sort
  result, fields = get_hosts(result)

  if result.empty?
    STDERR.puts("no match found: #{search_args.join(" ")}")
    exit(1)
  end

  addresses = result.map {|host| [host.first, host.last] }

  # build ssh command
  cmdline = ["ssh"]
  ssh_option[:options].each do |option|
    cmdline << "-o" << option
  end
  if path = ssh_option[:identity_file]
    cmdline << "-i" << Shellwords.escape(path)
  end
  if port = ssh_option[:port]
    cmdline << "-p" << port.to_s
  end
  if ssh_option[:forward_agent]
    cmdline << "-A"
  end

  cmdline << "-o" << "BatchMode=yes"

  user = ssh_option[:user]

  threads = ssh_option[:max_parallelism] || addresses.size
  stats = Parallel.map(addresses, in_threads: threads) do |address,name|
    if use_color
      header = "\e[0;36m#{name}\e[00m"
    else
      header = name
    end

    c = cmdline.dup
    if user
      c << (user + "@" + address)
    else
      c << address
    end

    c.concat(args)

    IO.popen([*c, in: :close, err: [:child, :out]]) do |io|
      io.each_line {|line|
        STDOUT.write "#{header}: #{line}"
      }
    end
    $?.success?  # $? is thread-local variable
  end

  unless stats.all? {|success| success }
    exit(1)
  end
end