306 lines
12 KiB
Scheme
306 lines
12 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2014, 2016, 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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(define-module (build-self)
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#:use-module (gnu)
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#:use-module (guix)
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#:use-module (guix ui)
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#:use-module (guix config)
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#:use-module (guix modules)
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#:use-module (srfi srfi-1)
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#:use-module (srfi srfi-19)
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#:use-module (rnrs io ports)
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#:use-module (ice-9 match)
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#:use-module (ice-9 popen)
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#:export (build))
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;;; Commentary:
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;;;
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;;; When loaded, this module returns a monadic procedure of at least one
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;;; argument: the source tree to build. It returns a derivation that
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;;; builds it.
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;;;
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;;; This file uses modules provided by the already-installed Guix. Those
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;;; modules may be arbitrarily old compared to the version we want to
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;;; build. Because of that, it must rely on the smallest set of features
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;;; that are likely to be provided by the (guix) and (gnu) modules, and by
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;;; Guile itself, forever and ever.
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;;;
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;;; Code:
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;;;
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;;; Generating (guix config).
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;;;
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;;; This is copied from (guix self) because we cannot assume (guix self) is
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;;; available at this point.
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;;;
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(define %dependency-variables
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;; (guix config) variables corresponding to dependencies.
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'(%libgcrypt %libz %xz %gzip %bzip2 %nix-instantiate))
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(define %persona-variables
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;; (guix config) variables that define Guix's persona.
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'(%guix-package-name
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%guix-version
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%guix-bug-report-address
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%guix-home-page-url))
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(define %config-variables
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;; (guix config) variables corresponding to Guix configuration (storedir,
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;; localstatedir, etc.)
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(sort (filter pair?
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(module-map (lambda (name var)
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(and (not (memq name %dependency-variables))
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(not (memq name %persona-variables))
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(cons name (variable-ref var))))
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(resolve-interface '(guix config))))
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(lambda (name+value1 name+value2)
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(string<? (symbol->string (car name+value1))
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(symbol->string (car name+value2))))))
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(define* (make-config.scm #:key libgcrypt zlib gzip xz bzip2
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(package-name "GNU Guix")
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(package-version "0")
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(bug-report-address "bug-guix@gnu.org")
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(home-page-url "https://gnu.org/s/guix"))
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;; Hack so that Geiser is not confused.
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(define defmod 'define-module)
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(scheme-file "config.scm"
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#~(begin
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(#$defmod (guix config)
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#:export (%guix-package-name
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%guix-version
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%guix-bug-report-address
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%guix-home-page-url
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%libgcrypt
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%libz
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%gzip
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%bzip2
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%xz
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%nix-instantiate))
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;; XXX: Work around <http://bugs.gnu.org/15602>.
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(eval-when (expand load eval)
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#$@(map (match-lambda
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((name . value)
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#~(define-public #$name #$value)))
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%config-variables)
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(define %guix-package-name #$package-name)
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(define %guix-version #$package-version)
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(define %guix-bug-report-address #$bug-report-address)
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(define %guix-home-page-url #$home-page-url)
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(define %gzip
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#+(and gzip (file-append gzip "/bin/gzip")))
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(define %bzip2
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#+(and bzip2 (file-append bzip2 "/bin/bzip2")))
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(define %xz
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#+(and xz (file-append xz "/bin/xz")))
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(define %libgcrypt
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#+(and libgcrypt
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(file-append libgcrypt "/lib/libgcrypt")))
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(define %libz
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#+(and zlib
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(file-append zlib "/lib/libz")))
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(define %nix-instantiate ;for (guix import snix)
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"nix-instantiate")))))
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;;;
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;;; 'gexp->script'.
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;;;
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;;; This is our own variant of 'gexp->script' with an extra #:module-path
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;;; parameter, which was unavailable in (guix gexp) until commit
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;;; 1ae16033f34cebe802023922436883867010850f (March 2018.)
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;;;
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(define (load-path-expression modules path)
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"Return as a monadic value a gexp that sets '%load-path' and
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'%load-compiled-path' to point to MODULES, a list of module names. MODULES
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are searched for in PATH."
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(mlet %store-monad ((modules (imported-modules modules
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#:module-path path))
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(compiled (compiled-modules modules
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#:module-path path)))
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(return (gexp (eval-when (expand load eval)
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(set! %load-path
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(cons (ungexp modules) %load-path))
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(set! %load-compiled-path
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(cons (ungexp compiled)
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%load-compiled-path)))))))
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(define* (gexp->script name exp
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#:key (guile (default-guile))
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(module-path %load-path))
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"Return an executable script NAME that runs EXP using GUILE, with EXP's
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imported modules in its search path."
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(mlet %store-monad ((set-load-path
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(load-path-expression (gexp-modules exp)
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module-path)))
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(gexp->derivation name
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(gexp
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(call-with-output-file (ungexp output)
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(lambda (port)
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;; Note: that makes a long shebang. When the store
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;; is /gnu/store, that fits within the 128-byte
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;; limit imposed by Linux, but that may go beyond
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;; when running tests.
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(format port
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"#!~a/bin/guile --no-auto-compile~%!#~%"
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(ungexp guile))
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(write '(ungexp set-load-path) port)
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(write '(ungexp exp) port)
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(chmod port #o555))))
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#:module-path module-path)))
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(define (date-version-string)
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"Return the current date and hour in UTC timezone, for use as a poor
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person's version identifier."
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;; XXX: Replace with a Git commit id.
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(date->string (current-date 0) "~Y~m~d.~H"))
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(define* (build-program source version
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#:optional (guile-version (effective-version)))
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"Return a program that computes the derivation to build Guix from SOURCE."
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(define select?
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;; Select every module but (guix config) and non-Guix modules.
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(match-lambda
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(('guix 'config) #f)
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(('guix _ ...) #t)
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(('gnu _ ...) #t)
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(_ #f)))
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(with-imported-modules `(((guix config)
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=> ,(make-config.scm
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#:libgcrypt
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(specification->package "libgcrypt")))
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,@(source-module-closure `((guix store)
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(guix self)
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(guix derivations)
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(gnu packages bootstrap))
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(list source)
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#:select? select?))
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(gexp->script "compute-guix-derivation"
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#~(begin
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(use-modules (ice-9 match))
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(eval-when (expand load eval)
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;; Don't augment '%load-path'.
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(unsetenv "GUIX_PACKAGE_PATH")
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;; (gnu packages …) modules are going to be looked up
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;; under SOURCE. (guix config) is looked up in FRONT.
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(match %load-path
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((#$source _ ...)
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#t) ;already done
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((front _ ...)
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(set! %load-path (list #$source front))))
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;; Only load our own modules or those of Guile.
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(match %load-compiled-path
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((front _ ... sys1 sys2)
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(set! %load-compiled-path
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(list front sys1 sys2)))))
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(use-modules (guix store)
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(guix self)
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(guix derivations)
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(srfi srfi-1))
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(define (spin system)
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(define spin
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(circular-list "-" "\\" "|" "/" "-" "\\" "|" "/"))
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(format (current-error-port)
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"Computing Guix derivation for '~a'... "
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system)
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(let loop ((spin spin))
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(display (string-append "\b" (car spin))
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(current-error-port))
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(force-output (current-error-port))
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(sleep 1)
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(loop (cdr spin))))
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(match (command-line)
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((_ _ system)
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(with-store store
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(call-with-new-thread
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(lambda ()
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(spin system)))
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(display
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(derivation-file-name
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(run-with-store store
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(guix-derivation #$source #$version
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#$guile-version)
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#:system system)))))))
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#:module-path (list source))))
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;; The procedure below is our return value.
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(define* (build source
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#:key verbose? (version (date-version-string)) system
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(guile-version (match ((@ (guile) version))
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("2.2.2" "2.2.2")
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(_ (effective-version))))
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#:allow-other-keys
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#:rest rest)
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"Return a derivation that unpacks SOURCE into STORE and compiles Scheme
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files."
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;; Build the build program and then use it as a trampoline to build from
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;; SOURCE.
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(mlet %store-monad ((build (build-program source version guile-version))
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(system (if system (return system) (current-system))))
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(mbegin %store-monad
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(show-what-to-build* (list build))
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(built-derivations (list build))
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(let* ((pipe (begin
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(setenv "GUILE_WARN_DEPRECATED" "no") ;be quiet and drive
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(open-pipe* OPEN_READ
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(derivation->output-path build)
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source system)))
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(str (get-string-all pipe))
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(status (close-pipe pipe)))
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(match str
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((? eof-object?)
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(error "build program failed" (list build status)))
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((? derivation-path? drv)
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(mbegin %store-monad
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(return (newline (current-output-port)))
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((store-lift add-temp-root) drv)
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(return (read-derivation-from-file drv))))
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((? string? str)
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(error "invalid build result" (list build str))))))))
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;; This file is loaded by 'guix pull'; return it the build procedure.
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build
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;; Local Variables:
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;; eval: (put 'with-load-path 'scheme-indent-function 1)
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;; End:
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;;; build-self.scm ends here
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