Class: Hotdog::Commands::Ssh

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

Constant Summary

Constants inherited from BaseCommand

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

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/ssh.rb', line 11

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

  optparse.on("-n", "--index INDEX", "Use this index of host if multiple servers are found", Integer) do |index|
    ssh_option[:index] = index
  end
  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("-A", "Enable agent forwarding", TrueClass) do |b|
    ssh_option[:forward_agent] = b
  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

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

  if result.length == 1
    host = result[0]
  elsif result.empty?
    STDERR.puts("no match found: #{search_args.join(" ")}")
    exit(1)
  else
    if ssh_option[:index] && result.length > ssh_option[:index]
      host = result[ssh_option[:index]]
    else
      result, fields = get_hosts_with_search_tags(result, node)

      # add "index" field
      result = result.each_with_index.map {|host,i| [i] + host }
      fields = ["index"] + fields

      STDERR.print(format(result, fields: fields))
      logger.info("found %d host(s)." % result.length)
      exit(1)
    end
  end

  result, fields = get_hosts([host])
  address = result.flatten.first

  # 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
  if user = ssh_option[:user]
    cmdline << (user + "@" + address)
  else
    cmdline << address
  end
  cmdline.concat(args)

  exec *cmdline
  exit(127)
end