blob: b0f240c0e85b43f85ba783afe9ba617c39a911e9 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
|
;;; Consfigurator -- Lisp declarative configuration management system
;;; Copyright (C) 2021 David Bremner <david@tethera.net>
;;; 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.files-tree)
(named-readtables:in-readtable :consfigurator)
(defmethod register-data-source ((type (eql :files-tree)) &key location)
"Provide the contents of a local directory on the machine running the root
Lisp. Register this data source multiple times to provide multiple trees.
LOCATION is either a designator for a pathname representing the root of the
tree of files or a symbol which designates an ASDF package where the tree is
contained in the subdirectory 'data/'.
LOCATION, IDEN1 and IDEN2 are concatenated to locate files. Thus, IDEN1
specifies a (possibly nested) subdirectory under LOCATION and IDEN2 a relative
path within that subdirectory. For convenience IDEN1 and IDEN2 may be passed
as absolute and will be converted to relative paths. The usual cases of IDEN1
as a hostname, IDEN1 as an underscore-prefixed identifier, and IDEN2 an an
absolute or relative path are all supported."
(let ((base-path (if (symbolp location)
(asdf:system-relative-pathname location "data/")
(ensure-directory-pathname location))))
(unless (directory-exists-p base-path)
(missing-data-source
"~A does not exist, or is not a directory." base-path))
(labels ((check (iden1 iden2)
(let ((file-path (literal-data-pathname base-path iden1 iden2)))
(and (file-exists-p file-path)
(file-write-date file-path))))
(extract (iden1 iden2)
(let ((file-path (literal-data-pathname base-path iden1 iden2)))
(and (file-exists-p file-path)
(make-instance 'file-data
:file file-path
:iden1 iden1
:iden2 iden2
:version (file-write-date file-path))))))
(cons #'check #'extract))))
|
