unofficial mirror of guix-devel@gnu.org 
 help / color / mirror / code / Atom feed
blob c696dcb36304e2a9594eaef1320958e38099dacd 8803 bytes (raw)
name: guix/import/github.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
 
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2016 Ben Woodcroft <donttrustben@gmail.com>
;;;
;;; 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 github)
  #:use-module (ice-9 match)
  #:use-module (srfi srfi-1)
  #:use-module (json)
  #:use-module (guix utils)
  #:use-module ((guix download) #:prefix download:)
  #:use-module (guix import utils)
  #:use-module (guix packages)
  #:use-module (guix upstream)
  #:use-module (gnu packages)
  #:use-module (web uri)
  #:export (%github-updater))

(define (json-fetch* url)
  "Return a list/hash representation of the JSON resource URL, or #f on
failure."
  (call-with-output-file "/dev/null"
    (lambda (null)
      (with-error-to-port null
        (lambda ()
          (call-with-temporary-output-file
           (lambda (temp port)
             (and (url-fetch url temp)
                  (call-with-input-file temp json->scm)))))))))

(define (find-extension url)
  "Return the extension of the archive e.g. '.tar.gz' given a URL, or
false if none is recognized"
  (find (lambda x (string-suffix? (first x) url))
        (list ".tar.gz" ".tar.bz2" ".tar.xz" ".zip" ".tar")))

(define (updated-github-url old-package new-version)
  ;; Return a url for the OLD-PACKAGE with NEW-VERSION.  If no source url in
  ;; the OLD-PACKAGE is a GitHub url, then return false.

  (define (updated-url url)
    (if (string-prefix? "https://github.com/" url)
        (let ((ext     (find-extension url))
              (name    (package-name old-package))
              (version (package-version old-package))
              (prefix  (string-append "https://github.com/"
                                      (github-user-slash-repository url)))
              (repo    (github-repository url)))
          (cond
           ((string-suffix? (string-append "/tarball/v" version) url)
            (string-append prefix "/tarball/v" new-version))
           ((string-suffix? (string-append "/tarball/" version) url)
            (string-append prefix "/tarball/" new-version))
           ((string-suffix? (string-append "/archive/v" version ext) url)
            (string-append prefix "/archive/v" new-version ext))
           ((string-suffix? (string-append "/archive/" version ext) url)
            (string-append prefix "/archive/" new-version ext))
           ((string-suffix? (string-append "/archive/" name "-" version ext)
                            url)
            (string-append prefix "/archive/" name "-" new-version ext))
           ((string-suffix? (string-append "/releases/download/v" version "/"
                                           name "-" version ext)
                            url)
            (string-append prefix "/releases/download/v" new-version "/" name
                           "-" new-version ext))
           ((string-suffix? (string-append "/releases/download/" version "/"
                                           name "-" version ext)
                            url)
            (string-append prefix "/releases/download/" new-version "/" name
                           "-" new-version ext))
           ((string-suffix? (string-append "/releases/download/" version "/"
                                           repo "-" version ext)
                            url)
            (string-append prefix "/releases/download/" new-version "/" repo
                           "-" new-version ext))
           ((string-suffix? (string-append "/releases/download/" repo "-"
                                           version "/" repo "-" version ext)
                            url)
            (string-append "/releases/download/" repo "-" version "/" repo "-"
                           version ext))
           (#t #f))) ; Some URLs are not recognised.
        #f))

  (let ((source-url (and=> (package-source old-package) origin-uri))
        (fetch-method (and=> (package-source old-package) origin-method)))
    (if (eq? fetch-method download:url-fetch)
        (match source-url
          ((? string?)
           (updated-url source-url))
          ((source-url ...)
           (find updated-url source-url)))
        #f)))

(define (github-package? package)
  "Return true if PACKAGE is a package from GitHub, else false."
  (not (eq? #f (updated-github-url package "dummy"))))

(define (github-repository url)
  "Return a string e.g. bedtools2 of the name of the repository, from a string
URL of the form 'https://github.com/arq5x/bedtools2/archive/v2.24.0.tar.gz'"
  (match (string-split (uri-path (string->uri url)) #\/)
    ((_ owner project . rest)
     (string-append project))))

(define (github-user-slash-repository url)
  "Return a string e.g. arq5x/bedtools2 of the owner and the name of the
repository separated by a forward slash, from a string URL of the form
'https://github.com/arq5x/bedtools2/archive/v2.24.0.tar.gz'"
  (match (string-split (uri-path (string->uri url)) #\/)
    ((_ owner project . rest)
     (string-append owner "/" project))))

(define %github-token
  ;; Token to be passed to Github.com to avoid the 60-request per hour
  ;; limit, or #f.
  (make-parameter (getenv "GUIX_GITHUB_TOKEN")))

(define (latest-released-version url package-name)
  "Return a string of the newest released version name given a string URL like
'https://github.com/arq5x/bedtools2/archive/v2.24.0.tar.gz' and the name of
the package e.g. 'bedtools2'.  Return #f if there is no releases"
  (let* ((token (%github-token))
         (api-url (string-append
                   "https://api.github.com/repos/"
                   (github-user-slash-repository url)
                   "/releases"))
         (json (json-fetch*
                (if token
                    (string-append api-url "?access_token=" token)
                    api-url))))
    (if (eq? json #f)
        (if token
            (error "Error downloading release information through the GitHub
API when using a GitHub token")
            (error "Error downloading release information through the GitHub
API. This may be fixed by using an access token and setting the environment
variable GUIX_GITHUB_TOKEN, for instance one procured from
https://github.com/settings/tokens"))
        (let ((proper-releases
               (filter
                (lambda (x)
                  ;; example pre-release:
                  ;; https://github.com/wwood/OrfM/releases/tag/v0.5.1
                  ;; or an all-prerelease set
                  ;; https://github.com/powertab/powertabeditor/releases
                  (not (hash-ref x "prerelease")))
                json)))
          (match proper-releases
            (()                       ;empty release list
             #f)
            ((release . rest)         ;one or more releases
             (let ((tag (hash-ref release "tag_name"))
                   (name-length (string-length package-name)))
               ;; some tags include the name of the package e.g. "fdupes-1.51"
               ;; so remove these
               (if (and (< name-length (string-length tag))
                        (string=? (string-append package-name "-")
                                  (substring tag 0 (+ name-length 1))))
                   (substring tag (+ name-length 1))
                   ;; some tags start with a "v" e.g. "v0.25.0"
                   ;; where some are just the version number
                   (if (eq? (string-ref tag 0) #\v)
                       (substring tag 1) tag)))))))))

(define (latest-release guix-package)
  "Return an <upstream-source> for the latest release of GUIX-PACKAGE."
  (let* ((pkg (specification->package guix-package))
         (source-uri (origin-uri (package-source pkg)))
         (name (package-name pkg))
         (newest-version (latest-released-version source-uri name)))
    (if newest-version
        (upstream-source
         (package pkg)
         (version newest-version)
         (urls (list (updated-github-url pkg newest-version))))
        #f))) ; On GitHub but no proper releases

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



debug log:

solving c696dcb ...
found c696dcb 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 public inbox

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

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).