;;; GNU Guix --- Functional package management for GNU ;;; Copyright © 2017 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/>. ;;; Commentary: ;;; ;;; This scripts updates the definition of the 'guix' package in Guix for the ;;; current commit. It requires Git to be installed. ;;; ;;; Code: (use-modules (guix) (guix git-download) (guix upstream) (guix utils) (guix base32) (guix build utils) (gnu packages package-management) (ice-9 match)) (define %top-srcdir (string-append (current-source-directory) "/..")) (define version-controlled? (git-predicate %top-srcdir)) (define (package-definition-location) "Return the source properties of the definition of the 'guix' package." (call-with-input-file (location-file (package-location guix)) (lambda (port) (let loop () (match (read port) ((? eof-object?) (error "definition of 'guix' package could not be found" (port-filename port))) (('define-public 'guix value) (source-properties value)) (_ (loop))))))) (define* (update-definition commit hash #:key version old-hash) "Return a one-argument procedure that takes a string, the definition of the 'guix' package, and returns a string, the update definition for VERSION, COMMIT." (define (linear-offset str line column) ;; Return the offset in characters to reach LINE and COLUMN (both ;; zero-indexed) in STR. (call-with-input-string str (lambda (port) (let loop ((offset 0)) (cond ((and (= (port-column port) column) (= (port-line port) line)) offset) ((eof-object? (read-char port)) (error "line and column not reached!" str)) (else (loop (+ 1 offset)))))))) (define (update-hash str) ;; Replace OLD-HASH with HASH in STR. (string-replace-substring str (bytevector->nix-base32-string old-hash) (bytevector->nix-base32-string hash))) (lambda (str) (match (call-with-input-string str read) (('let (('version old-version) ('commit old-commit) ('revision old-revision)) defn) (let* ((location (source-properties defn)) (line (assq-ref location 'line)) (column 0) (offset (linear-offset str line column))) (string-append (format #f "(let ((version \"~a\") (commit \"~a\") (revision ~a))\n" (or version old-version) commit (if (and version (not (string=? version old-version))) 0 (+ 1 old-revision))) (string-drop (update-hash str) offset)))) (exp (error "'guix' package definition is not as expected" exp))))) (define (main . args) (match args ((commit version) (with-store store (let* ((source (add-to-store store "guix-checkout" ;dummy name #t "sha256" %top-srcdir #:select? version-controlled?)) (hash (query-path-hash store source)) (location (package-definition-location)) (old-hash (origin-sha256 (package-source guix)))) (edit-expression location (update-definition commit hash #:old-hash old-hash #:version version)) ;; Re-add SOURCE to the store, but this time under the real name used ;; in the 'origin'. This allows us to build the package without ;; having to make a real checkout; thus, it also works when working ;; on a private branch. (reload-module (resolve-module '(gnu packages package-management))) (let* ((source (add-to-store store (origin-file-name (package-source guix)) #t "sha256" source)) (root (store-path-package-name source))) ;; Add an indirect GC root for SOURCE in the current directory. (false-if-exception (delete-file root)) (symlink source root) (add-indirect-root store root) (format #t "source code for commit ~a: ~a (GC root: ~a)~%" commit source root))))) ((commit) ;; Automatically deduce the version and revision numbers. (main commit #f)))) (apply main (cdr (command-line)))