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c4e48b68 | 1 | ;;; GNU Guix --- Functional package management for GNU |
67c2db17 | 2 | ;;; Copyright © 2014, 2015, 2016, 2017, 2019 Ludovic Courtès <ludo@gnu.org> |
c4e48b68 RW |
3 | ;;; Copyright © 2016 Ricardo Wurmus <rekado@elephly.net> |
4 | ;;; | |
5 | ;;; This file is part of GNU Guix. | |
6 | ;;; | |
7 | ;;; GNU Guix is free software; you can redistribute it and/or modify it | |
8 | ;;; under the terms of the GNU General Public License as published by | |
9 | ;;; the Free Software Foundation; either version 3 of the License, or (at | |
10 | ;;; your option) any later version. | |
11 | ;;; | |
12 | ;;; GNU Guix is distributed in the hope that it will be useful, but | |
13 | ;;; WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | ;;; GNU General Public License for more details. | |
16 | ;;; | |
17 | ;;; You should have received a copy of the GNU General Public License | |
18 | ;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>. | |
19 | ||
20 | (define-module (guix hg-download) | |
21 | #:use-module (guix gexp) | |
22 | #:use-module (guix store) | |
23 | #:use-module (guix monads) | |
24 | #:use-module (guix records) | |
37ce440d | 25 | #:use-module (guix modules) |
c4e48b68 RW |
26 | #:use-module (guix packages) |
27 | #:autoload (guix build-system gnu) (standard-packages) | |
28 | #:use-module (ice-9 match) | |
521d33cd HP |
29 | #:use-module (ice-9 popen) |
30 | #:use-module (ice-9 rdelim) | |
c4e48b68 RW |
31 | #:export (hg-reference |
32 | hg-reference? | |
33 | hg-reference-url | |
34 | hg-reference-changeset | |
35 | hg-reference-recursive? | |
521d33cd | 36 | hg-predicate |
c4e48b68 RW |
37 | hg-fetch)) |
38 | ||
39 | ;;; Commentary: | |
40 | ;;; | |
41 | ;;; An <origin> method that fetches a specific changeset from a Mercurial | |
42 | ;;; repository. The repository URL and changeset ID are specified with a | |
43 | ;;; <hg-reference> object. | |
44 | ;;; | |
45 | ;;; Code: | |
46 | ||
47 | (define-record-type* <hg-reference> | |
48 | hg-reference make-hg-reference | |
49 | hg-reference? | |
50 | (url hg-reference-url) | |
51 | (changeset hg-reference-changeset)) | |
52 | ||
53 | (define (hg-package) | |
54 | "Return the default Mercurial package." | |
55 | (let ((distro (resolve-interface '(gnu packages version-control)))) | |
56 | (module-ref distro 'mercurial))) | |
57 | ||
58 | (define* (hg-fetch ref hash-algo hash | |
59 | #:optional name | |
60 | #:key (system (%current-system)) (guile (default-guile)) | |
61 | (hg (hg-package))) | |
62 | "Return a fixed-output derivation that fetches REF, a <hg-reference> | |
63 | object. The output is expected to have recursive hash HASH of type | |
64 | HASH-ALGO (a symbol). Use NAME as the file name, or a generic name if #f." | |
e9f8a7e2 MO |
65 | (define guile-zlib |
66 | (module-ref (resolve-interface '(gnu packages guile)) 'guile-zlib)) | |
37ce440d LC |
67 | |
68 | (define modules | |
e9f8a7e2 MO |
69 | (delete '(guix config) |
70 | (source-module-closure '((guix build hg) | |
71 | (guix build download-nar))))) | |
37ce440d | 72 | |
c4e48b68 | 73 | (define build |
37ce440d | 74 | (with-imported-modules modules |
e9f8a7e2 MO |
75 | (with-extensions (list guile-zlib) |
76 | #~(begin | |
77 | (use-modules (guix build hg) | |
78 | (guix build download-nar)) | |
c4e48b68 | 79 | |
e9f8a7e2 MO |
80 | (or (hg-fetch '#$(hg-reference-url ref) |
81 | '#$(hg-reference-changeset ref) | |
82 | #$output | |
83 | #:hg-command (string-append #+hg "/bin/hg")) | |
84 | (download-nar #$output)))))) | |
c4e48b68 RW |
85 | |
86 | (mlet %store-monad ((guile (package->derivation guile system))) | |
87 | (gexp->derivation (or name "hg-checkout") build | |
67c2db17 LC |
88 | #:leaked-env-vars '("http_proxy" "https_proxy" |
89 | "LC_ALL" "LC_MESSAGES" "LANG" | |
90 | "COLUMNS") | |
c4e48b68 RW |
91 | #:system system |
92 | #:local-build? #t ;don't offload repo cloning | |
93 | #:hash-algo hash-algo | |
94 | #:hash hash | |
95 | #:recursive? #t | |
c4e48b68 RW |
96 | #:guile-for-build guile))) |
97 | ||
521d33cd HP |
98 | (define (hg-file-list directory) |
99 | "Evaluates to a list of files contained in the repository at path | |
100 | @var{directory}" | |
101 | (let* ((port (open-input-pipe (format #f "hg files --repository ~s" directory))) | |
102 | (files (let loop ((files '())) | |
103 | (let ((line (read-line port))) | |
104 | (cond | |
105 | ((eof-object? line) files) | |
106 | (else | |
107 | (loop (cons line files)))))))) | |
108 | (close-pipe port) | |
109 | (map canonicalize-path files))) | |
110 | ||
111 | (define (should-select? path-list candidate) | |
112 | "Returns #t in case that @var{candidate} is a file that is part of the given | |
113 | @var{path-list}." | |
114 | (let ((canon-candidate (canonicalize-path candidate))) | |
115 | (let loop ((xs path-list)) | |
116 | (cond | |
117 | ((null? xs) | |
118 | ;; Directories are not part of `hg files', but `local-file' will not | |
119 | ;; recurse if we don't return #t for directories. | |
120 | (equal? (array-ref (lstat candidate) 13) 'directory)) | |
121 | ((string-contains candidate (car xs)) #t) | |
122 | (else (loop (cdr xs))))))) | |
123 | ||
124 | (define (hg-predicate directory) | |
125 | "This procedure evaluates to a predicate that reports back whether a given | |
126 | @var{file} - @var{stat} combination is part of the files tracked by | |
127 | Mercurial." | |
128 | (let ((files (hg-file-list directory))) | |
129 | (lambda (file stat) | |
130 | (should-select? files file)))) | |
131 | ||
c4e48b68 | 132 | ;;; hg-download.scm ends here |