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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.shell-wrap)
(named-readtables:in-readtable :interpol-syntax)
(defclass shell-wrap-connection (posix-connection) ())
(defgeneric connection-shell-wrap (connection cmd))
(defmethod connection-run ((c shell-wrap-connection) cmd input)
(mrun :may-fail :input input (connection-shell-wrap c cmd)))
(defmethod connection-readfile ((c shell-wrap-connection) path)
(multiple-value-bind (out exit)
(let ((path (escape-sh-token path)))
(connection-run c #?"test -r ${path} && cat ${path}" nil))
(if (= 0 exit) out (error "File ~S not readable" path))))
(defmethod connection-writefile ((conn shell-wrap-connection)
path
contents
umask)
(with-remote-temporary-file (temp)
(connection-run conn
(if umask
(format nil "( umask ~O; cat >~A )" umask temp)
#?"cat >${temp}")
contents)
(connection-run conn
#?"mv ${(escape-sh-token temp)} ${(escape-sh-token path)}"
nil)))
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