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;;; Consfigurator -- Lisp declarative configuration management system
;;; Copyright (C) 2021 Sean Whitton <spwhitton@spwhitton.name>
;;; This file is free software; you can redistribute it and/or modify
;;; it under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3, or (at your option)
;;; any later version.
;;; This file is distributed in the hope that it will be useful,
;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;;; GNU General Public License for more details.
;;; You should have received a copy of the GNU General Public License
;;; along with this program. If not, see <http://www.gnu.org/licenses/>.
(in-package :consfigurator.connection.ssh)
(defmethod establish-connection ((type (eql :ssh)) remaining
&key
(hop (hostattr *host* :hostname)))
(declare (ignore remaining))
(run "ssh" "-fN" hop)
(make-instance 'ssh-connection :hostname hop))
(defclass ssh-connection (posix-connection)
((hostname
:documentation "Hostname to SSH to."))
(:documentation "Deploy properties using non-interactive SSH."))
(defmacro sshcmd (&rest args)
;; wrap in 'sh -c' in case the login shell is not POSIX
`(list "ssh"
(slot-value connection :hostname)
(escape-sh-command "sh" "-c" ,@args)))
(defmethod connection-run ((connection ssh-connection) cmd &optional input)
(run :input input (sshcmd cmd)))
(defmethod connection-readfile ((connection ssh-connection) path)
(multiple-value-bind (output error-code)
(run (sshcmd "test" "-r" "path" "&&" "cat" path))
(if (= 0 error-code)
output
(error "File ~S not readable" path))))
;; write to a temporary file, and then atomically move into place
(defmethod connection-writefile ((connection ssh-connection) path contents))
;; rsync it to its destination, so rsync can be smart about updates
(defmethod connection-upload ((connection ssh-connection) from to))
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