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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.property.file)
(named-readtables:in-readtable :consfigurator)
(defun map-file-lines (file function)
"Apply FUNCTION to the lines of FILE. Safe to use in a :POSIX property.
For efficiency, a :LISP property might want to use streams, but there's no
point in doing that here because WRITEFILE is synchronous."
(let* ((orig-lines (lines (readfile file)))
(new-lines (funcall function orig-lines)))
(if (equal orig-lines new-lines)
:no-change
(writefile file (unlines new-lines)))))
(defprop has-content :posix (path content)
"Ensure there is a file at PATH whose content is CONTENT.
CONTENT can be a list of lines or a single string."
(declare (indent 1))
(:apply (writefile path (etypecase content
(cons (unlines content))
(string (format nil "~A~&" content))))))
(defprop contains-lines :posix (path lines)
"Ensure there is a file at PATH containing each of LINES once."
(:apply
(let ((new-lines (copy-list lines))
(existing-lines (lines (readfile path))))
(dolist (existing-line existing-lines)
(deletef new-lines existing-line :test #'string=))
(writefile path (unlines (nconc existing-lines new-lines))))))
(defprop has-mode :posix (path mode)
"Ensure that a file has a particular numeric mode."
(:desc (format nil "~A has mode ~O" path mode))
(:apply
(mrun (format nil "chmod ~O ~A" mode path))))
(defprop does-not-exist :posix (path)
"Ensure that a file does not exist."
(:desc #?"${path} does not exist")
(:check (test "!" "-e" path))
(:apply (run "rm" "-f" path)))
(defprop data-uploaded :posix (iden1 iden2 destination)
(:hostattrs
(declare (ignore destination))
(require-data iden1 iden2))
(:apply
(writefile destination (get-data-stream iden1 iden2))))
(defprop host-data-uploaded :posix (destination)
(:hostattrs
(require-data (get-hostname) destination))
(:apply
(data-uploaded (get-hostname) destination destination)))
(defprop secret-uploaded :posix (iden1 iden2 destination)
(:hostattrs
(declare (ignore destination))
(require-data iden1 iden2))
(:apply
(writefile destination (get-data-stream iden1 iden2) :mode #o600)))
(defprop host-secret-uploaded :posix (destination)
(:hostattrs
(require-data (get-hostname) destination))
(:apply
(secret-uploaded (get-hostname) destination destination)))
(defprop regex-replaced-lines :posix (file regex replace)
"Like s/REGEX/REPLACE/ on the lines of FILE.
Uses CL-PPCRE:REGEX-REPLACE, which see for the syntax of REPLACE."
(:apply
(map-file-lines
file
(lambda (lines)
(mapcar (lambda (line) (re:regex-replace regex line replace)) lines)))))
(defprop directory-exists :posix (dir)
"Ensure that a directory and its parents exists."
(:desc (strcat dir " exists"))
(:apply
(mrun "mkdir" "-p" dir)))
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