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;;; Consfigurator -- Lisp declarative configuration management system
;;; Copyright (C) 2020-2021 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.local)
(defmethod establish-connection ((type (eql :local)) host &key)
(make-instance 'local-connection))
(defclass local-connection (lisp-connection)
()
(:documentation "The root deployment: applying properties to the machine the
root Lisp is running on, as the root Lisp's uid."))
;; assumes a POSIX shell (otherwise we could wrap in 'sh -c')
(defmethod connection-run ((connection local-connection)
shell-cmd
&optional
input)
;; if INPUT is a stream, RUN-PROGRAM will empty it into a temporary file
;; anyway, but it will not do so successfully if INPUT is a binary stream --
;; in particular, it will try to call COPY-STREAM-TO-STREAM with
;; :ELEMENT-TYPE CHARACTER. so empty it into a temporary file ourselves.
(with-temporary-file (:pathname temp)
(etypecase input
(string
(with-output-to-file (s temp :if-exists :supersede)
(write-sequence input s)))
(stream
(with-open-file (s temp :element-type (stream-element-type input)
:direction :output
:if-exists :supersede)
(copy-stream-to-stream input s
:element-type (stream-element-type input))))
(null nil))
(multiple-value-bind (output _ exit-code)
(run-program shell-cmd
:force-shell t
:input temp
:output :string
:error-output :output
:ignore-error-status t)
(declare (ignore _))
(values output exit-code))))
(defmethod connection-readfile ((connection local-connection) path)
(read-file-string path))
(defmethod connection-writefile ((connection local-connection)
path
(contents string))
(with-open-file (stream path :direction :output :if-exists :supersede)
(write-string contents stream)))
(defmethod connection-writefile ((connection local-connection)
path
(contents stream))
(with-open-file (stream path :direction :output :if-exists :supersede)
(copy-stream-to-stream contents stream)))
(defmethod connection-upload ((connection local-connection) from to)
(copy-file from to))
;; set the root Lisp's connection context now we've defined its value -- other
;; implementations of ESTABLISH-CONNECTION will rely on this when they call
;; RUN, READFILE etc.
(eval-when (:load-toplevel :execute)
(unless consfigurator::*connection*
(setq consfigurator::*connection*
(make-instance 'local-connection))))
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