;;; GNU Guix --- Functional package management for GNU ;;; Copyright © 2014, 2016, 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/>. (define-module (build-self) #:use-module (gnu) #:use-module (guix) #:use-module (guix config) #:use-module (srfi srfi-1) #:use-module (srfi srfi-19) #:use-module (ice-9 match) #:export (build)) ;;; Commentary: ;;; ;;; When loaded, this module returns a monadic procedure of at least one ;;; argument: the source tree to build. It returns a derivation that ;;; builds it. ;;; ;;; This file uses modules provided by the already-installed Guix. Those ;;; modules may be arbitrarily old compared to the version we want to ;;; build. Because of that, it must rely on the smallest set of features ;;; that are likely to be provided by the (guix) and (gnu) modules, and by ;;; Guile itself, forever and ever. ;;; ;;; Code: ;; The dependencies. Don't refer explicitly to the variables because they ;; could be renamed or shuffled around in modules over time. Conversely, ;; 'find-best-packages-by-name' is expected to always have the same semantics. (define libgcrypt (first (find-best-packages-by-name "libgcrypt" #f))) (define zlib (first (find-best-packages-by-name "zlib" #f))) (define gzip (first (find-best-packages-by-name "gzip" #f))) (define bzip2 (first (find-best-packages-by-name "bzip2" #f))) (define xz (first (find-best-packages-by-name "xz" #f))) (define (false-if-wrong-guile package) "Return #f if PACKAGE depends on the \"wrong\" major version of Guile (e.g., 2.0 instead of 2.2), otherwise return PACKAGE." (let ((guile (any (match-lambda ((label (? package? dep) _ ...) (and (string=? (package-name dep) "guile") dep))) (package-direct-inputs package)))) (and (or (not guile) (string-prefix? (effective-version) (package-version guile))) package))) (define (package-for-current-guile . names) "Return the package with one of the given NAMES that depends on the current Guile major version (2.0 or 2.2), or #f if none of the packages matches." (let loop ((names names)) (match names (() #f) ((name rest ...) (match (find-best-packages-by-name name #f) (() (loop rest)) ((first _ ...) (or (false-if-wrong-guile first) (loop rest)))))))) (define guile-json (package-for-current-guile "guile-json" "guile2.2-json" "guile2.0-json")) (define guile-ssh (package-for-current-guile "guile-ssh" "guile2.2-ssh" "guile2.0-ssh")) (define guile-git (package-for-current-guile "guile-git" "guile2.0-git")) (define guile-bytestructures (package-for-current-guile "guile-bytestructures" "guile2.0-bytestructures")) ;; The actual build procedure. (define (top-source-directory) "Return the name of the top-level directory of this source tree." (and=> (assoc-ref (current-source-location) 'filename) (lambda (file) (string-append (dirname file) "/..")))) (define (date-version-string) "Return the current date and hour in UTC timezone, for use as a poor person's version identifier." ;; XXX: Replace with a Git commit id. (date->string (current-date 0) "~Y~m~d.~H")) (define (matching-guile-2.2) "Return a Guile 2.2 with the same version as the current one or immediately older than then current one. This is so that we do not build ABI-incompatible objects. See <https://bugs.gnu.org/29570>." (let loop ((packages (find-packages-by-name "guile" "2.2")) (best #f)) (match packages (() best) ((head tail ...) (if (string=? (package-version head) (version)) head (if best (if (version>? (package-version head) (version)) (loop tail best) (loop tail head)) (loop tail head))))))) (define (guile-for-build) "Return a derivation for Guile 2.0 or 2.2, whichever matches the currently running Guile." (package->derivation (cond-expand (guile-2.2 (canonical-package (matching-guile-2.2))) (else (canonical-package (specification->package "guile@2.0")))))) ;; The procedure below is our return value. (define* (build source #:key verbose? (version (date-version-string)) #:allow-other-keys #:rest rest) "Return a derivation that unpacks SOURCE into STORE and compiles Scheme files." ;; The '%xxxdir' variables were added to (guix config) in July 2016 so we ;; cannot assume that they are defined. Try to guess their value when ;; they're undefined (XXX: we get an incorrect guess when environment ;; variables such as 'NIX_STATE_DIR' are defined!). (define storedir (if (defined? '%storedir) %storedir %store-directory)) (define localstatedir (if (defined? '%localstatedir) %localstatedir (dirname %state-directory))) (define sysconfdir (if (defined? '%sysconfdir) %sysconfdir (dirname %config-directory))) (define sbindir (if (defined? '%sbindir) %sbindir (dirname %guix-register-program))) (define builder #~(begin (use-modules (guix build pull)) (letrec-syntax ((maybe-load-path (syntax-rules () ((_ item rest ...) (let ((tail (maybe-load-path rest ...))) (if (string? item) (cons (string-append item "/share/guile/site/" #$(effective-version)) tail) tail))) ((_) '())))) (set! %load-path (append (maybe-load-path #$guile-json #$guile-ssh #$guile-git #$guile-bytestructures) %load-path))) (letrec-syntax ((maybe-load-compiled-path (syntax-rules () ((_ item rest ...) (let ((tail (maybe-load-compiled-path rest ...))) (if (string? item) (cons (string-append item "/lib/guile/" #$(effective-version) "/site-ccache") tail) tail))) ((_) '())))) (set! %load-compiled-path (append (maybe-load-compiled-path #$guile-json #$guile-ssh #$guile-git #$guile-bytestructures) %load-compiled-path))) ;; XXX: The 'guile-ssh' package prior to Guix commit 92b7258 was ;; broken: libguile-ssh could not be found. Work around that. ;; FIXME: We want Guile-SSH 0.10.2 or later anyway. #$(if (string-prefix? "0.9." (package-version guile-ssh)) #~(setenv "LTDL_LIBRARY_PATH" (string-append #$guile-ssh "/lib")) #t) (build-guix #$output #$source #:system #$%system #:storedir #$storedir #:localstatedir #$localstatedir #:sysconfdir #$sysconfdir #:sbindir #$sbindir #:package-name #$%guix-package-name #:package-version #$version #:bug-report-address #$%guix-bug-report-address #:home-page-url #$%guix-home-page-url #:libgcrypt #$libgcrypt #:zlib #$zlib #:gzip #$gzip #:bzip2 #$bzip2 #:xz #$xz ;; XXX: This is not perfect, enabling VERBOSE? means ;; building a different derivation. #:debug-port (if #$verbose? (current-error-port) (%make-void-port "w"))))) (unless guile-git ;; XXX: Guix before February 2017 lacks a 'guile-git' package altogether. ;; If we try to upgrade anyway, the logic in (guix scripts pull) will not ;; build (guix git), which will leave us with an unusable 'guix pull'. To ;; avoid that, fail early. (format (current-error-port) "\ Your installation is too old and lacks a '~a' package. Please upgrade to an intermediate version first, for instance with: guix pull --url=https://git.savannah.gnu.org/cgit/guix.git/snapshot/v0.13.0.tar.gz \n" (match (effective-version) ("2.0" "guile2.0-git") (_ "guile-git"))) (exit 1)) (mlet %store-monad ((guile (guile-for-build))) (gexp->derivation "guix-latest" builder #:modules '((guix build pull) (guix build utils) (guix build compile) ;; Closure of (guix modules). (guix modules) (guix memoization) (guix profiling) (guix sets)) ;; Arrange so that our own (guix build …) modules are ;; used. #:module-path (list (top-source-directory)) #:guile-for-build guile))) ;; This file is loaded by 'guix pull'; return it the build procedure. build ;; Local Variables: ;; eval: (put 'with-load-path 'scheme-indent-function 1) ;; End: ;;; build-self.scm ends here