all messages for Guix-related lists mirrored at yhetil.org
 help / color / mirror / code / Atom feed
blob d9db876222ef161454dcc90813ce13c975f76bd0 15474 bytes (raw)
name: guix/import/pypi.scm 	 # note: path name is non-authoritative(*)

  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
361
362
363
364
365
366
367
368
 
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2014 David Thompson <davet@gnu.org>
;;; Copyright © 2015 Cyril Roelandt <tipecaml@gmail.com>
;;; Copyright © 2015, 2016, 2017 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2017 Mathieu Othacehe <m.othacehe@gmail.com>
;;; Copyright © 2018 Ricardo Wurmus <rekado@elephly.net>
;;;
;;; 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 pypi)
  #:use-module (ice-9 binary-ports)
  #:use-module (ice-9 match)
  #:use-module (ice-9 pretty-print)
  #:use-module (ice-9 regex)
  #:use-module (ice-9 receive)
  #:use-module ((ice-9 rdelim) #:select (read-line))
  #:use-module (srfi srfi-1)
  #:use-module (srfi srfi-26)
  #:use-module (srfi srfi-34)
  #:use-module (srfi srfi-35)
  #:use-module (rnrs bytevectors)
  #:use-module (json)
  #:use-module (web uri)
  #:use-module (guix ui)
  #:use-module (guix utils)
  #:use-module ((guix build utils)
                #:select ((package-name->name+version
                           . hyphen-package-name->name+version)
                          find-files))
  #:use-module (guix import utils)
  #:use-module ((guix download) #:prefix download:)
  #:use-module (guix import json)
  #:use-module (guix packages)
  #:use-module (guix upstream)
  #:use-module ((guix licenses) #:prefix license:)
  #:use-module (guix build-system python)
  #:export (parse-requires.txt
            guix-package->pypi-name
            pypi-recursive-import
            pypi->guix-package
            %pypi-updater))

(define (pypi-fetch name)
  "Return an alist representation of the PyPI metadata for the package NAME,
or #f on failure."
  (json-fetch-alist (string-append "https://pypi.org/pypi/" name "/json")))

;; For packages found on PyPI that lack a source distribution.
(define-condition-type &missing-source-error &error
  missing-source-error?
  (package  missing-source-error-package))

(define (latest-source-release pypi-package)
  "Return the latest source release for PYPI-PACKAGE."
  (let ((releases (assoc-ref* pypi-package "releases"
                              (assoc-ref* pypi-package "info" "version"))))
    (or (find (lambda (release)
                (string=? "sdist" (assoc-ref release "packagetype")))
              releases)
        (raise (condition (&missing-source-error
                           (package pypi-package)))))))

(define (latest-wheel-release pypi-package)
  "Return the url of the wheel for the latest release of pypi-package,
or #f if there isn't any."
  (let ((releases (assoc-ref* pypi-package "releases"
                              (assoc-ref* pypi-package "info" "version"))))
    (or (find (lambda (release)
                (string=? "bdist_wheel" (assoc-ref release "packagetype")))
              releases)
        #f)))

(define (python->package-name name)
  "Given the NAME of a package on PyPI, return a Guix-compliant name for the
package."
  (if (string-prefix? "python-" name)
      (snake-case name)
      (string-append "python-" (snake-case name))))

(define (guix-package->pypi-name package)
  "Given a Python PACKAGE built from pypi.org, return the name of the
package on PyPI."
  (define (url->pypi-name url)
    (hyphen-package-name->name+version
     (basename (file-sans-extension url))))

  (match (and=> (package-source package) origin-uri)
    ((? string? url)
     (url->pypi-name url))
    ((lst ...)
     (any url->pypi-name lst))
    (#f #f)))

(define (wheel-url->extracted-directory wheel-url)
  (match (string-split (basename wheel-url) #\-)
    ((name version _ ...)
     (string-append name "-" version ".dist-info"))))

(define (maybe-inputs package-inputs)
  "Given a list of PACKAGE-INPUTS, tries to generate the 'inputs' field of a
package definition."
  (match package-inputs
    (()
     '())
    ((package-inputs ...)
     `((propagated-inputs (,'quasiquote ,package-inputs))))))

(define (clean-requirement s)
  ;; Given a requirement LINE, as can be found in a setuptools requires.txt
  ;; file, remove everything other than the actual name of the required
  ;; package, and return it.
  (cond
   ((string-index s (char-set #\space #\> #\= #\<)) => (cut string-take s <>))
   (else s)))

(define (parse-requires.txt requires.txt)
  "Given REQUIRES.TXT, a Setuptools requires.txt file, return a list of
requirement names."
  ;; This is a very incomplete parser, whose job is to select the non-optional
  ;; dependencies and strip them out of any version information.
  ;; Alternatively, we could implement a PEG parser with the (ice-9 peg)
  ;; library and the requirements grammar defined by PEP-0508
  ;; (https://www.python.org/dev/peps/pep-0508/).

  (define (comment? line)
    ;; Return #t if the given LINE is a comment, #f otherwise.
    (string-prefix? "#" (string-trim line)))

  (define (section-header? line)
    ;; Return #t if the given LINE is a section header, #f otherwise.
    (string-prefix? "[" (string-trim line)))

  (call-with-input-file requires.txt
    (lambda (port)
      (let loop ((result '()))
        (let ((line (read-line port)))
          ;; Stop when a section is encountered, as sections contain optional
          ;; (extra) requirements.  Non-optional requirements must appear
          ;; before any section is defined.
          (if (or (eof-object? line) (section-header? line))
              (reverse result)
              (cond
               ((or (string-null? line) (comment? line))
                (loop result))
               (else
                (loop (cons (clean-requirement line)
                            result))))))))))

(define (guess-requirements source-url wheel-url tarball)
  "Given SOURCE-URL, WHEEL-URL and a TARBALL of the package, return a list
of the required packages specified in the requirements.txt file.  TARBALL will
be extracted in a temporary directory."

  (define (tarball-directory url)
    ;; Given the URL of the package's tarball, return the name of the directory
    ;; that will be created upon decompressing it. If the filetype is not
    ;; supported, return #f.
    ;; TODO: Support more archive formats.
    (let ((basename (substring url (+ 1 (string-rindex url #\/)))))
      (cond
       ((string-suffix? ".tar.gz" basename)
        (string-drop-right basename 7))
       ((string-suffix? ".tar.bz2" basename)
        (string-drop-right basename 8))
       (else
        (begin
          (warning (G_ "Unsupported archive format: \
cannot determine package dependencies"))
          #f)))))

  (define (read-wheel-metadata wheel-archive)
    ;; Given WHEEL-ARCHIVE, a ZIP Python wheel archive, return the package's
    ;; requirements.
    (let* ((dirname (wheel-url->extracted-directory wheel-url))
           (json-file (string-append dirname "/metadata.json")))
      (and (zero? (system* "unzip" "-q" wheel-archive json-file))
           (dynamic-wind
             (const #t)
             (lambda ()
               (call-with-input-file json-file
                 (lambda (port)
                   (let* ((metadata (json->scm port))
                          (run_requires (hash-ref metadata "run_requires"))
                          (requirements (if run_requires
                                            (hash-ref (list-ref run_requires 0)
                                                       "requires")
                                            '())))
                     (map clean-requirement requirements)))))
             (lambda ()
               (delete-file json-file)
               (rmdir dirname))))))

  (define (guess-requirements-from-wheel)
    ;; Return the package's requirements using the wheel, or #f if an error
    ;; occurs.
    (call-with-temporary-output-file
     (lambda (temp port)
       (if wheel-url
         (and (url-fetch wheel-url temp)
              (read-wheel-metadata temp))
         #f))))

  (define (guess-requirements-from-source)
    ;; Return the package's requirements by guessing them from the source.
    (let ((dirname (tarball-directory source-url)))
      (if (string? dirname)
          (call-with-temporary-directory
           (lambda (dir)
             (let* ((pypi-name (string-take dirname (string-rindex dirname #\-)))
                    (requires.txt (string-append dirname "/" pypi-name
                                                 ".egg-info" "/requires.txt"))
                    (exit-code (parameterize ((current-error-port (%make-void-port "rw+"))
                                              (current-output-port (%make-void-port "rw+")))
                                 (system* "tar" "xf" tarball "-C" dir requires.txt))))
               (if (zero? exit-code)
                   (parse-requires.txt (string-append dir "/" requires.txt))
                   (begin
                     (warning
                      (G_ "Failed to extract file: ~a from source.~%")
                      requires.txt)
                     '())))))
          '())))

  ;; First, try to compute the requirements using the wheel, else, fallback to
  ;; reading the "requires.txt" from the egg-info directory from the source
  ;; tarball.
  (or (guess-requirements-from-wheel)
      (guess-requirements-from-source)))

(define (compute-inputs source-url wheel-url tarball)
  "Given the SOURCE-URL of an already downloaded TARBALL, return a list of
name/variable pairs describing the required inputs of this package.  Also
return the unaltered list of upstream dependency names."
  (let ((dependencies
         (remove (cut string=? "argparse" <>)
                 (guess-requirements source-url wheel-url tarball))))
    (values (sort
             (map (lambda (input)
                    (let ((guix-name (python->package-name input)))
                      (list guix-name (list 'unquote (string->symbol guix-name)))))
                  dependencies)
             (lambda args
               (match args
                 (((a _ ...) (b _ ...))
                  (string-ci<? a b)))))
            dependencies)))

(define (make-pypi-sexp name version source-url wheel-url home-page synopsis
                        description license)
  "Return the `package' s-expression for a python package with the given NAME,
VERSION, SOURCE-URL, HOME-PAGE, SYNOPSIS, DESCRIPTION, and LICENSE."
  (call-with-temporary-output-file
   (lambda (temp port)
     (and (url-fetch source-url temp)
          (receive (input-package-names upstream-dependency-names)
              (compute-inputs source-url wheel-url temp)
            (values
             `(package
                (name ,(python->package-name name))
                (version ,version)
                (source (origin
                          (method url-fetch)

                          ;; Sometimes 'pypi-uri' doesn't quite work due to mixed
                          ;; cases in NAME, for instance, as is the case with
                          ;; "uwsgi".  In that case, fall back to a full URL.
                          (uri (pypi-uri ,(string-downcase name) version))
                          (sha256
                           (base32
                            ,(guix-hash-url temp)))))
                (build-system python-build-system)
                ,@(maybe-inputs input-package-names)
                (home-page ,home-page)
                (synopsis ,synopsis)
                (description ,description)
                (license ,(license->symbol license)))
             upstream-dependency-names))))))

(define pypi->guix-package
  (memoize
   (lambda* (package-name)
     "Fetch the metadata for PACKAGE-NAME from pypi.org, and return the
`package' s-expression corresponding to that package, or #f on failure."
     (let ((package (pypi-fetch package-name)))
       (and package
            (guard (c ((missing-source-error? c)
                       (let ((package (missing-source-error-package c)))
                         (leave (G_ "no source release for pypi package ~a ~a~%")
                                (assoc-ref* package "info" "name")
                                (assoc-ref* package "info" "version")))))
              (let ((name (assoc-ref* package "info" "name"))
                    (version (assoc-ref* package "info" "version"))
                    (release (assoc-ref (latest-source-release package) "url"))
                    (wheel (assoc-ref (latest-wheel-release package) "url"))
                    (synopsis (assoc-ref* package "info" "summary"))
                    (description (assoc-ref* package "info" "summary"))
                    (home-page (assoc-ref* package "info" "home_page"))
                    (license (string->license (assoc-ref* package "info" "license"))))
                (make-pypi-sexp name version release wheel home-page synopsis
                                description license))))))))

(define (pypi-recursive-import package-name)
  (recursive-import package-name #f
                    #:repo->guix-package (lambda (name repo)
                                           (pypi->guix-package name))
                    #:guix-name python->package-name))

(define (string->license str)
  "Convert the string STR into a license object."
  (match str
    ("GNU LGPL" license:lgpl2.0)
    ("GPL" license:gpl3)
    ((or "BSD" "BSD License") license:bsd-3)
    ((or "MIT" "MIT license" "Expat license") license:expat)
    ("Public domain" license:public-domain)
    ((or "Apache License, Version 2.0" "Apache 2.0") license:asl2.0)
    (_ #f)))

(define (pypi-package? package)
  "Return true if PACKAGE is a Python package from PyPI."

  (define (pypi-url? url)
    (or (string-prefix? "https://pypi.org/" url)
        (string-prefix? "https://pypi.python.org/" url)
        (string-prefix? "https://pypi.org/packages" url)))

  (let ((source-url (and=> (package-source package) origin-uri))
        (fetch-method (and=> (package-source package) origin-method)))
    (and (eq? fetch-method download:url-fetch)
         (match source-url
           ((? string?)
            (pypi-url? source-url))
           ((source-url ...)
            (any pypi-url? source-url))))))

(define (latest-release package)
  "Return an <upstream-source> for the latest release of PACKAGE."
  (let* ((pypi-name    (guix-package->pypi-name package))
         (pypi-package (pypi-fetch pypi-name)))
    (and pypi-package
         (guard (c ((missing-source-error? c) #f))
           (let* ((metadata pypi-package)
                  (version (assoc-ref* metadata "info" "version"))
                  (url (assoc-ref (latest-source-release metadata) "url")))
             (upstream-source
              (package (package-name package))
              (version version)
              (urls (list url))))))))

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

debug log:

solving d9db876222 ...
found d9db876222 in https://git.savannah.gnu.org/cgit/guix.git

(*) Git path names are given by the tree(s) the blob belongs to.
    Blobs themselves have no identifier aside from the hash of its contents.^

Code repositories for project(s) associated with this external index

	https://git.savannah.gnu.org/cgit/guix.git

This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.