summaryrefslogtreecommitdiff
path: root/guix/import/cpan.scm
blob: 514417f78114e2fdf2dbac13218f0e0b509a32f1 (about) (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
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2014 Eric Bavier <bavier@member.fsf.org>
;;; Copyright © 2015 Mark H Weaver <mhw@netris.org>
;;; Copyright © 2016 Alex Sassmannshausen <alex@pompo.co>
;;; Copyright © 2017, 2018 Tobias Geerinckx-Rice <me@tobias.gr>
;;; Copyright © 2020 Ludovic Courtès <ludo@gnu.org>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix 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 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Guix 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 GNU Guix.  If not, see <http://www.gnu.org/licenses/>.

(define-module (guix import cpan)
  #:use-module (ice-9 match)
  #:use-module (ice-9 regex)
  #:use-module ((ice-9 popen) #:select (open-pipe* close-pipe))
  #:use-module ((ice-9 rdelim) #:select (read-line))
  #:use-module (srfi srfi-1)
  #:use-module (srfi srfi-26)
  #:use-module (json)
  #:use-module (gcrypt hash)
  #:use-module (guix store)
  #:use-module (guix utils)
  #:use-module (guix base32)
  #:use-module (guix ui)
  #:use-module ((guix download) #:select (download-to-store url-fetch))
  #:use-module ((guix import utils) #:select (factorize-uri))
  #:use-module (guix import json)
  #:use-module (guix packages)
  #:use-module (guix upstream)
  #:use-module (guix derivations)
  #:export (cpan-dependency?
            cpan-dependency-relationship
            cpan-dependency-phase
            cpan-dependency-module
            cpan-dependency-version

            cpan-release?
            cpan-release-license
            cpan-release-author
            cpan-release-version
            cpan-release-module
            cpan-release-distribution
            cpan-release-download-url
            cpan-release-abstract
            cpan-release-home-page
            cpan-release-dependencies
            json->cpan-release

            cpan-fetch
            cpan->guix-package
            metacpan-url->mirror-url
            %cpan-updater

            %metacpan-base-url))

;;; Commentary:
;;;
;;; Generate a package declaration template for the latest version of a CPAN
;;; module, using meta-data from metacpan.org.
;;;
;;; Code:

(define %metacpan-base-url
  ;; Base URL of the MetaCPAN API.
  (make-parameter "https://fastapi.metacpan.org/v1/"))

;; Dependency of a "release".
(define-json-mapping <cpan-dependency> make-cpan-dependency cpan-dependency?
  json->cpan-dependency
  (relationship cpan-dependency-relationship "relationship"
                string->symbol)                   ;requires | suggests
  (phase        cpan-dependency-phase "phase"
                string->symbol)          ;develop | configure | test | runtime
  (module       cpan-dependency-module)           ;string
  (version      cpan-dependency-version))         ;string

;; Release as returned by <https://fastapi.metacpan.org/v1/release/PKG>.
(define-json-mapping <cpan-release> make-cpan-release cpan-release?
  json->cpan-release
  (license      cpan-release-license)
  (author       cpan-release-author)
  (version      cpan-release-version "version"
                (match-lambda
                  ((? number? version)
                   ;; Version is sometimes not quoted in the module json, so
                   ;; it gets imported into Guile as a number, so convert it
                   ;; to a string (example: "X11-Protocol-Other").
                   (number->string version))
                  ((? string? version)
                   ;; Sometimes we get a "v" prefix.  Strip it.
                   (if (string-prefix? "v" version)
                       (string-drop version 1)
                       version))))
  (module       cpan-release-module "main_module") ;e.g., "Test::Script"
  (distribution cpan-release-distribution)         ;e.g., "Test-Script"
  (download-url cpan-release-download-url "download_url")
  (abstract     cpan-release-abstract "abstract")
  (home-page    cpan-release-home-page "resources"
                (match-lambda
                  (#f #f)
                  ((lst ...) (assoc-ref lst "homepage"))))
  (dependencies cpan-release-dependencies "dependency"
                (lambda (vector)
                  (map json->cpan-dependency (vector->list vector)))))

(define string->license
  (match-lambda
   ;; List of valid values from https://metacpan.org/pod/CPAN::Meta::Spec.
   ;; Some licenses are excluded based on their absense from (guix licenses).
   ("agpl_3" 'agpl3)
   ;; apache_1_1
   ("apache_2_0" 'asl2.0)
   ;; artistic_1
   ("artistic_2" 'artistic2.0)
   ("bsd" 'bsd-3)
   ("freebsd" 'bsd-2)
   ;; gfdl_1_2
   ("gfdl_1_3" 'fdl1.3+)
   ("gpl_1" 'gpl1)
   ("gpl_2" 'gpl2)
   ("gpl_3" 'gpl3)
   ("lgpl_2_1" 'lgpl2.1)
   ("lgpl_3_0" 'lgpl3)
   ("mit" 'x11)
   ;; mozilla_1_0
   ("mozilla_1_1" 'mpl1.1)
   ("openssl" 'openssl)
   ("perl_5" 'perl-license)   ;GPL1+ and Artistic 1
   ("qpl_1_0" 'qpl)
   ;; ssleay
   ;; sun
   ("zlib" 'zlib)
   (#(x) (string->license x))
   (#(lst ...) `(list ,@(map string->license lst)))
   (_ #f)))

(define (module->name module)
  "Transform a 'module' name into a 'release' name"
  (regexp-substitute/global #f "::" module 'pre "-" 'post))

(define (module->dist-name module)
  "Return the base distribution module for a given module.  E.g. the 'ok'
module is distributed with 'Test::Simple', so (module->dist-name \"ok\") would
return \"Test-Simple\""
  (assoc-ref (json-fetch (string-append
                          (%metacpan-base-url) "/module/"
                          module
                          "?fields=distribution"))
             "distribution"))

(define (package->upstream-name package)
  "Return the CPAN name of PACKAGE."
  (let* ((properties (package-properties package))
         (upstream-name (and=> properties
                               (cut assoc-ref <> 'upstream-name))))
    (or upstream-name
        (match (package-source package)
          ((? origin? origin)
           (match (origin-uri origin)
             ((or (? string? url) (url _ ...))
              (match (string-match (string-append "([^/]*)-v?[0-9\\.]+") url)
                (#f #f)
                (m (match:substring m 1))))
             (_ #f)))
          (_ #f)))))

(define (cpan-fetch name)
  "Return a <cpan-release> record for Perl module MODULE,
or #f on failure.  MODULE should be the distribution name, such as
\"Test-Script\" for the \"Test::Script\" module."
  ;; This API always returns the latest release of the module.
  (and=> (json-fetch (string-append (%metacpan-base-url) "/release/"
                                    name))
         json->cpan-release))

(define (cpan-home name)
  (string-append "https://metacpan.org/release/" name))

(define (metacpan-url->mirror-url url)
  "Replace 'https://cpan.metacpan.org' in URL with 'mirror://cpan'."
  (regexp-substitute/global #f "http[s]?://cpan.metacpan.org"
                            url
                            'pre "mirror://cpan" 'post))

(define cpan-source-url
  (compose metacpan-url->mirror-url cpan-release-download-url))

(define (perl-package)
  "Return the 'perl' package.  This is a lazy reference so that we don't
depend on (gnu packages perl)."
  (module-ref (resolve-interface '(gnu packages perl)) 'perl))

(define %corelist
  (delay
    (let* ((perl (with-store store
                   (derivation->output-path
                    (package-derivation store (perl-package)))))
           (core (string-append perl "/bin/corelist")))
      (and (access? core X_OK)
           core))))

(define core-module?
  (let ((rx (make-regexp
             (string-append "released with perl v?([0-9\\.]*)"
                            "(.*and removed from v?([0-9\\.]*))?"))))
    (lambda (name)
      (define perl-version
        (package-version (perl-package)))

      (define (version-between? lower version upper)
        (and (version>=? version lower)
             (or (not upper)
                 (version>? upper version))))
      (and (force %corelist)
           (parameterize ((current-error-port (%make-void-port "w")))
             (let* ((corelist (open-pipe* OPEN_READ (force %corelist) name)))
               (let loop ()
                 (let ((line (read-line corelist)))
                   (if (eof-object? line)
                       (begin (close-pipe corelist) #f)
                       (or (and=> (regexp-exec rx line)
                                  (lambda (m)
                                    (let ((first (match:substring m 1))
                                          (last  (match:substring m 3)))
                                      (version-between?
                                       first perl-version last))))
                           (loop)))))))))))

(define (cpan-module->sexp release)
  "Return the 'package' s-expression for a CPAN module from the release data
in RELEASE, a <cpan-release> record."
  (define name
    (cpan-release-distribution release))

  (define (guix-name name)
    (if (string-prefix? "perl-" name)
        (string-downcase name)
        (string-append "perl-" (string-downcase name))))

  (define version (cpan-release-version release))
  (define source-url (cpan-source-url release))

  (define (convert-inputs phases)
    ;; Convert phase dependencies into a list of name/variable pairs.
    (match (filter-map (lambda (dependency)
                         (and (memq (cpan-dependency-phase dependency)
                                    phases)
                              (cpan-dependency-module dependency)))
                       (cpan-release-dependencies release))
      ((inputs ...)
       (sort
        (delete-duplicates
         ;; Listed dependencies may include core modules.  Filter those out.
         (filter-map (match-lambda
                       ("perl" #f)                ;implicit dependency
                       ((? core-module?) #f)
                       (module
                         (let ((name (guix-name (module->dist-name module))))
                           (list name
                                 (list 'unquote (string->symbol name))))))
                     inputs))
        (lambda args
          (match args
            (((a _ ...) (b _ ...))
             (string<? a b))))))))

  (define (maybe-inputs guix-name inputs)
    (match inputs
      (()
       '())
      ((inputs ...)
       (list (list guix-name
                   (list 'quasiquote inputs))))))

  (let ((tarball (with-store store
                   (download-to-store store source-url))))
    `(package
       (name ,(guix-name name))
       (version ,version)
       (source (origin
                 (method url-fetch)
                 (uri (string-append ,@(factorize-uri source-url version)))
                 (sha256
                  (base32
                   ,(bytevector->nix-base32-string (file-sha256 tarball))))))
       (build-system perl-build-system)
       ,@(maybe-inputs 'native-inputs
                       ;; "runtime" may also be needed here.  See
                       ;; https://metacpan.org/pod/CPAN::Meta::Spec#Phases,
                       ;; which says they are required during building.  We
                       ;; have not yet had a need for cross-compiled perl
                       ;; modules, however, so we leave it out.
                       (convert-inputs '(configure build test)))
       ,@(maybe-inputs 'propagated-inputs
                       (convert-inputs '(runtime)))
       (home-page ,(cpan-home name))
       (synopsis ,(cpan-release-abstract release))
       (description fill-in-yourself!)
       (license ,(string->license (cpan-release-license release))))))

(define (cpan->guix-package module-name)
  "Fetch the metadata for PACKAGE-NAME from metacpan.org, and return the
`package' s-expression corresponding to that package, or #f on failure."
  (let ((release (cpan-fetch (module->name module-name))))
    (and=> release cpan-module->sexp)))

(define cpan-package?
  (let ((cpan-rx (make-regexp (string-append "("
                                             "mirror://cpan" "|"
                                             "https?://www.cpan.org" "|"
                                             "https?://cpan.metacpan.org"
                                             ")"))))
    (url-predicate (cut regexp-exec cpan-rx <>))))

(define (latest-release package)
  "Return an <upstream-source> for the latest release of PACKAGE."
  (match (cpan-fetch (package->upstream-name package))
    (#f #f)
    (release
     (let ((core-inputs
            (match (package-direct-inputs package)
              (((_ inputs _ ...) ...)
               (filter-map (match-lambda
                             ((and (? package?)
                                   (? cpan-package?)
                                   (= package->upstream-name
                                      (? core-module? name)))
                              name)
                             (else #f))
                           inputs)))))
       ;; Warn about inputs that are part of perl's core
       (unless (null? core-inputs)
         (for-each (lambda (module)
                     (warning (G_ "input '~a' of ~a is in Perl core~%")
                              module (package-name package)))
                   core-inputs)))
     (let ((version (cpan-release-version release))
           (url     (cpan-source-url release)))
       (upstream-source
        (package (package-name package))
        (version version)
        (urls (list url)))))))

(define %cpan-updater
  (upstream-updater
   (name 'cpan)
   (description "Updater for CPAN packages")
   (pred cpan-package?)
   (latest latest-release)))