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Diffstat (limited to 'src/data/local-file.lisp')
| -rw-r--r-- | src/data/local-file.lisp | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/src/data/local-file.lisp b/src/data/local-file.lisp new file mode 100644 index 0000000..080c0da --- /dev/null +++ b/src/data/local-file.lisp @@ -0,0 +1,39 @@ +;;; 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.data.git-snapshot) +(named-readtables:in-readtable :consfigurator) + +(defmethod register-data-source + ((type (eql :local-file)) &key file version iden1 iden2) + "Provide the contents of a single local file on the machine running the root +Lisp. Register this data source more than once to provide multiple files. +The version of the data provided is either VERSION or the file's last +modification time." + (unless (file-exists-p file) + (missing-data-source "~A does not exist." file)) + (cons (lambda (iden1* iden2*) + (and (string= iden1 iden1*) (string= iden2 iden2*) + (file-exists-p file) + (or version (file-write-date file)))) + (lambda (iden1* iden2*) + (and (string= iden1 iden1*) (string= iden2 iden2*) + (file-exists-p file) + (make-instance 'file-data + :file file + :iden1 iden1 :iden2 iden2 + :version (or version (file-write-date file))))))) |