193 lines
7.9 KiB
Scheme
193 lines
7.9 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2017, 2018 Ludovic Courtès <ludo@gnu.org>
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;;;
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;;; This file is part of GNU Guix.
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;;;
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;;; GNU Guix is free software; you can redistribute it and/or modify it
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;;; under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation; either version 3 of the License, or (at
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;;; your option) any later version.
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;;;
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;;; GNU Guix is distributed in the hope that it will be useful, but
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;;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;; GNU General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;;;
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;;; This script updates the list of new and updated packages in 'NEWS'.
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;;;
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;;; Code:
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(use-modules (gnu) (guix)
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(guix build utils)
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((guix ui) #:select (fill-paragraph))
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(srfi srfi-1)
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(srfi srfi-11)
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(ice-9 match)
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(ice-9 rdelim)
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(ice-9 regex)
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(ice-9 vlist)
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(ice-9 pretty-print))
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(define %header-rx
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(make-regexp "^\\* Changes in (version )?([0-9.]+) \\(since ([0-9.]+)\\)"))
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(define (NEWS->versions port)
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"Return two values: the previous version and the current version as read
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from PORT, which is an input port on the 'NEWS' file."
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(let loop ()
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(let ((line (read-line port)))
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(cond ((eof-object? line)
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(error "failed to determine previous and current version"
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port))
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((regexp-exec %header-rx line)
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=>
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(lambda (match)
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(values (match:substring match 3)
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(match:substring match 2))))
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(else
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(loop))))))
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(define (skip-to-org-heading port)
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"Read from PORT until an Org heading is found."
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(let loop ()
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(let ((next (peek-char port)))
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(cond ((eqv? next #\*)
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#t)
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((eof-object? next)
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(error "next heading could not be found"))
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(else
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(read-line port)
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(loop))))))
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(define (rewrite-org-section input output heading-rx proc)
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"Write to OUTPUT the text read from INPUT, but with the first Org section
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matching HEADING-RX replaced by NEW-HEADING and CONTENTS."
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(let loop ()
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(let ((line (read-line input)))
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(cond ((eof-object? line)
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(error "failed to match heading regexp" heading-rx))
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((regexp-exec heading-rx line)
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=>
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(lambda (match)
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(proc match output)
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(skip-to-org-heading input)
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(dump-port input output)
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#t))
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(else
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(display line output)
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(newline output)
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(loop))))))
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(define (enumeration->paragraph lst)
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"Turn LST, a list of strings, into a single string that is a ready-to-print
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paragraph."
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(fill-paragraph (string-join (sort lst string<?) ", ")
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75))
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(define (write-packages-added news-file old new)
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"Write to NEWS-FILE the list of packages added between OLD and NEW."
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(let ((added (lset-difference string=? (map car new) (map car old))))
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(with-atomic-file-replacement news-file
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(lambda (input output)
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(rewrite-org-section input output
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(make-regexp "^(\\*+) (.*) new packages")
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(lambda (match port)
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(let ((stars (match:substring match 1)))
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(format port
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"~a ~a new packages~%~%"
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stars (length added)))))))))
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(define (write-packages-updates news-file old new)
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"Write to NEWS-FILE the list of packages upgraded between OLD and NEW."
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(define important
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'("gcc" "glibc" "binutils" "gdb" ;toolchain
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"shepherd" "linux-libre" "xorg-server" "cups" ;OS
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"gnome" "xfce" "enlightenment" "lxde" "mate" ;desktop env.
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"guile" "bash" "python" "python2" "perl" ;languages
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"ghc" "rust" "go" "julia" "r" "ocaml"
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"icedtea" "openjdk" "clojure" "sbcl" "racket"
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"emacs" "gimp" "inkscape" "libreoffice" ;applications
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"octave" "icecat" "gnupg"))
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(let* ((table (fold (lambda (package table)
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(match package
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((name . version)
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(vhash-cons name version table))))
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vlist-null
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new))
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(latest (lambda (name)
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(let ((versions (vhash-fold* cons '() name table)))
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(match (sort versions version>?)
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((latest . _) latest)))))
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(upgraded (filter-map (match-lambda
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((package . new-version)
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(match (assoc package old)
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((_ . old-version)
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(and (string=? new-version
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(latest package))
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(version>? new-version old-version)
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(cons package new-version)))
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(_ #f))))
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new))
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(noteworthy (filter (match-lambda
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((package . version)
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(member package important)))
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upgraded)))
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(with-atomic-file-replacement news-file
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(lambda (input output)
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(rewrite-org-section input output
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(make-regexp "^(\\*+) (.*) package updates")
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(lambda (match port)
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(let ((stars (match:substring match 1))
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(lst (map (match-lambda
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((package . version)
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(string-append package " "
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version)))
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noteworthy)))
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(format port
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"~a ~a package updates~%~%Noteworthy updates:~%~a~%~%"
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stars (length upgraded)
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(enumeration->paragraph lst)))))))))
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(define (main . args)
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(match args
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((news-file data-directory)
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;; Don't browse things listed in the user's $GUIX_PACKAGE_PATH and
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;; in external channels.
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(parameterize ((%package-module-path
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%default-package-module-path))
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(define (package-file version)
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(string-append data-directory "/packages-"
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version ".txt"))
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(let-values (((previous-version new-version)
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(call-with-input-file news-file NEWS->versions)))
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(format (current-error-port) "Updating NEWS for ~a to ~a...~%"
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previous-version new-version)
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(let* ((old (call-with-input-file (package-file previous-version)
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read))
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(new (fold-packages (lambda (p r)
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(alist-cons (package-name p) (package-version p)
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r))
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'())))
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(call-with-output-file (package-file new-version)
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(lambda (port)
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(pretty-print new port)))
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(write-packages-added news-file old new)
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(write-packages-updates news-file old new)))))
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(x
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(format (current-error-port) "Usage: update-NEWS NEWS-FILE DATA-DIRECTORY
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Update the list of new and updated packages in NEWS-FILE using the
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previous-version package list from DATA-DIRECTORY.\n")
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(exit 1))))
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(apply main (cdr (command-line)))
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