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920803fb | 1 | ;;; GNU Guix --- Functional package management for GNU |
fe634eaf | 2 | ;;; Copyright © 2017, 2018 Ludovic Courtès <ludo@gnu.org> |
920803fb LC |
3 | ;;; |
4 | ;;; This file is part of GNU Guix. | |
5 | ;;; | |
6 | ;;; GNU Guix is free software; you can redistribute it and/or modify it | |
7 | ;;; under the terms of the GNU General Public License as published by | |
8 | ;;; the Free Software Foundation; either version 3 of the License, or (at | |
9 | ;;; your option) any later version. | |
10 | ;;; | |
11 | ;;; GNU Guix is distributed in the hope that it will be useful, but | |
12 | ;;; WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | ;;; GNU General Public License for more details. | |
15 | ;;; | |
16 | ;;; You should have received a copy of the GNU General Public License | |
17 | ;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>. | |
18 | ||
19 | ;;; Commentary: | |
20 | ;;; | |
21 | ;;; This script updates the list of new and updated packages in 'NEWS'. | |
22 | ;;; | |
23 | ;;; Code: | |
24 | ||
25 | (use-modules (gnu) (guix) | |
26 | (guix build utils) | |
27 | ((guix ui) #:select (fill-paragraph)) | |
28 | (srfi srfi-1) | |
29 | (srfi srfi-11) | |
30 | (ice-9 match) | |
31 | (ice-9 rdelim) | |
32 | (ice-9 regex) | |
33 | (ice-9 pretty-print)) | |
34 | ||
35 | (define %header-rx | |
36 | (make-regexp "^\\* Changes in (version )?([0-9.]+) \\(since ([0-9.]+)\\)")) | |
37 | ||
38 | (define (NEWS->versions port) | |
39 | "Return two values: the previous version and the current version as read | |
40 | from PORT, which is an input port on the 'NEWS' file." | |
41 | (let loop () | |
42 | (let ((line (read-line port))) | |
43 | (cond ((eof-object? line) | |
44 | (error "failed to determine previous and current version" | |
45 | port)) | |
46 | ((regexp-exec %header-rx line) | |
47 | => | |
48 | (lambda (match) | |
49 | (values (match:substring match 3) | |
50 | (match:substring match 2)))) | |
51 | (else | |
52 | (loop)))))) | |
53 | ||
54 | (define (skip-to-org-heading port) | |
55 | "Read from PORT until an Org heading is found." | |
56 | (let loop () | |
57 | (let ((next (peek-char port))) | |
58 | (cond ((eqv? next #\*) | |
59 | #t) | |
60 | ((eof-object? next) | |
61 | (error "next heading could not be found")) | |
62 | (else | |
63 | (read-line port) | |
64 | (loop)))))) | |
65 | ||
66 | (define (rewrite-org-section input output heading-rx proc) | |
67 | "Write to OUTPUT the text read from INPUT, but with the first Org section | |
68 | matching HEADING-RX replaced by NEW-HEADING and CONTENTS." | |
69 | (let loop () | |
70 | (let ((line (read-line input))) | |
71 | (cond ((eof-object? line) | |
72 | (error "failed to match heading regexp" heading-rx)) | |
73 | ((regexp-exec heading-rx line) | |
74 | => | |
75 | (lambda (match) | |
76 | (proc match output) | |
77 | (skip-to-org-heading input) | |
78 | (dump-port input output) | |
79 | #t)) | |
80 | (else | |
81 | (display line output) | |
82 | (newline output) | |
83 | (loop)))))) | |
84 | ||
85 | (define (enumeration->paragraph lst) | |
86 | "Turn LST, a list of strings, into a single string that is a ready-to-print | |
87 | paragraph." | |
88 | (fill-paragraph (string-join (sort lst string<?) ", ") | |
89 | 75)) | |
90 | ||
91 | (define (write-packages-added news-file old new) | |
92 | "Write to NEWS-FILE the list of packages added between OLD and NEW." | |
93 | (let ((added (lset-difference string=? (map car new) (map car old)))) | |
94 | (with-atomic-file-replacement news-file | |
95 | (lambda (input output) | |
96 | (rewrite-org-section input output | |
97 | (make-regexp "^(\\*+) (.*) new packages") | |
98 | (lambda (match port) | |
99 | (let ((stars (match:substring match 1))) | |
100 | (format port | |
101 | "~a ~a new packages~%~%~a~%~%" | |
102 | stars (length added) | |
103 | (enumeration->paragraph added))))))))) | |
104 | ||
105 | (define (write-packages-updates news-file old new) | |
106 | "Write to NEWS-FILE the list of packages upgraded between OLD and NEW." | |
107 | (let ((upgraded (filter-map (match-lambda | |
108 | ((package . new-version) | |
109 | (match (assoc package old) | |
110 | ((_ . old-version) | |
111 | (and (version>? new-version old-version) | |
112 | (string-append package "@" | |
113 | new-version))) | |
114 | (_ #f)))) | |
115 | new))) | |
116 | (with-atomic-file-replacement news-file | |
117 | (lambda (input output) | |
118 | (rewrite-org-section input output | |
119 | (make-regexp "^(\\*+) (.*) package updates") | |
120 | (lambda (match port) | |
121 | (let ((stars (match:substring match 1))) | |
122 | (format port | |
123 | "~a ~a package updates~%~%~a~%~%" | |
124 | stars (length upgraded) | |
125 | (enumeration->paragraph upgraded))))))))) | |
126 | ||
127 | \f | |
128 | (define (main . args) | |
129 | (match args | |
130 | ((news-file data-directory) | |
fe634eaf LC |
131 | ;; Don't browse things listed in the user's $GUIX_PACKAGE_PATH and |
132 | ;; in external channels. | |
920803fb | 133 | (parameterize ((%package-module-path |
fe634eaf | 134 | %default-package-module-path)) |
920803fb LC |
135 | (define (package-file version) |
136 | (string-append data-directory "/packages-" | |
137 | version ".txt")) | |
138 | ||
139 | (let-values (((previous-version new-version) | |
140 | (call-with-input-file news-file NEWS->versions))) | |
141 | (let* ((old (call-with-input-file (package-file previous-version) | |
142 | read)) | |
143 | (new (fold-packages (lambda (p r) | |
144 | (alist-cons (package-name p) (package-version p) | |
145 | r)) | |
146 | '()))) | |
147 | (call-with-output-file (package-file new-version) | |
148 | (lambda (port) | |
149 | (pretty-print new port))) | |
150 | ||
151 | (write-packages-added news-file old new) | |
152 | (write-packages-updates news-file old new))))) | |
153 | (x | |
154 | (format (current-error-port) "Usage: update-NEWS NEWS-FILE DATA-DIRECTORY | |
155 | ||
156 | Update the list of new and updated packages in NEWS-FILE using the | |
157 | previous-version package list from DATA-DIRECTORY.\n") | |
158 | (exit 1)))) | |
159 | ||
160 | (apply main (cdr (command-line))) |