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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2014, 2016, 2017, 2018 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 ui)
#:use-module (guix config)
#:use-module (guix modules)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-19)
#:use-module (rnrs io ports)
#:use-module (ice-9 match)
#:use-module (ice-9 popen)
#: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:
;;;
;;; Generating (guix config).
;;;
;;; This is copied from (guix self) because we cannot assume (guix self) is
;;; available at this point.
;;;
(define %dependency-variables
;; (guix config) variables corresponding to dependencies.
'(%libgcrypt %libz %xz %gzip %bzip2 %nix-instantiate))
(define %persona-variables
;; (guix config) variables that define Guix's persona.
'(%guix-package-name
%guix-version
%guix-bug-report-address
%guix-home-page-url))
(define %config-variables
;; (guix config) variables corresponding to Guix configuration.
(letrec-syntax ((variables (syntax-rules ()
((_)
'())
((_ variable rest ...)
(cons `(variable . ,variable)
(variables rest ...))))))
(variables %config-directory %localstatedir %state-directory
%store-database-directory %store-directory
%storedir %sysconfdir %system)))
(define* (make-config.scm #:key libgcrypt zlib gzip xz bzip2
(package-name "GNU Guix")
(package-version "0")
(bug-report-address "bug-guix@gnu.org")
(home-page-url "https://gnu.org/s/guix"))
;; Hack so that Geiser is not confused.
(define defmod 'define-module)
(scheme-file "config.scm"
#~(begin
(#$defmod (guix config)
#:export (%guix-package-name
%guix-version
%guix-bug-report-address
%guix-home-page-url
%libgcrypt
%libz
%gzip
%bzip2
%xz
%nix-instantiate))
;; XXX: Work around <http://bugs.gnu.org/15602>.
(eval-when (expand load eval)
#$@(map (match-lambda
((name . value)
#~(define-public #$name #$value)))
%config-variables)
(define %guix-package-name #$package-name)
(define %guix-version #$package-version)
(define %guix-bug-report-address #$bug-report-address)
(define %guix-home-page-url #$home-page-url)
(define %gzip
#+(and gzip (file-append gzip "/bin/gzip")))
(define %bzip2
#+(and bzip2 (file-append bzip2 "/bin/bzip2")))
(define %xz
#+(and xz (file-append xz "/bin/xz")))
(define %libgcrypt
#+(and libgcrypt
(file-append libgcrypt "/lib/libgcrypt")))
(define %libz
#+(and zlib
(file-append zlib "/lib/libz")))
(define %nix-instantiate ;for (guix import snix)
"nix-instantiate")))))
;;;
;;; 'gexp->script'.
;;;
;;; This is our own variant of 'gexp->script' with an extra #:module-path
;;; parameter, which was unavailable in (guix gexp) until commit
;;; 1ae16033f34cebe802023922436883867010850f (March 2018.)
;;;
(define (load-path-expression modules path)
"Return as a monadic value a gexp that sets '%load-path' and
'%load-compiled-path' to point to MODULES, a list of module names. MODULES
are searched for in PATH."
(mlet %store-monad ((modules (imported-modules modules
#:module-path path))
(compiled (compiled-modules modules
#:module-path path)))
(return (gexp (eval-when (expand load eval)
(set! %load-path
(cons (ungexp modules) %load-path))
(set! %load-compiled-path
(cons (ungexp compiled)
%load-compiled-path)))))))
(define* (gexp->script name exp
#:key (guile (default-guile))
(module-path %load-path))
"Return an executable script NAME that runs EXP using GUILE, with EXP's
imported modules in its search path."
(mlet %store-monad ((set-load-path
(load-path-expression (gexp-modules exp)
module-path)))
(gexp->derivation name
(gexp
(call-with-output-file (ungexp output)
(lambda (port)
;; Note: that makes a long shebang. When the store
;; is /gnu/store, that fits within the 128-byte
;; limit imposed by Linux, but that may go beyond
;; when running tests.
(format port
"#!~a/bin/guile --no-auto-compile~%!#~%"
(ungexp guile))
(write '(ungexp set-load-path) port)
(write '(ungexp exp) port)
(chmod port #o555))))
#:module-path module-path)))
(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* (build-program source version
#:optional (guile-version (effective-version))
#:key (pull-version 0))
"Return a program that computes the derivation to build Guix from SOURCE."
(define select?
;; Select every module but (guix config) and non-Guix modules.
(match-lambda
(('guix 'config) #f)
(('guix _ ...) #t)
(('gnu _ ...) #t)
(_ #f)))
(with-imported-modules `(((guix config)
=> ,(make-config.scm
#:libgcrypt
(specification->package "libgcrypt")))
,@(source-module-closure `((guix store)
(guix self)
(guix derivations)
(gnu packages bootstrap))
(list source)
#:select? select?))
(gexp->script "compute-guix-derivation"
#~(begin
(use-modules (ice-9 match))
(eval-when (expand load eval)
;; Don't augment '%load-path'.
(unsetenv "GUIX_PACKAGE_PATH")
;; (gnu packages …) modules are going to be looked up
;; under SOURCE. (guix config) is looked up in FRONT.
(match %load-path
((#$source _ ...)
#t) ;already done
((front _ ...)
(set! %load-path (list #$source front))))
;; Only load our own modules or those of Guile.
(match %load-compiled-path
((front _ ... sys1 sys2)
(set! %load-compiled-path
(list front sys1 sys2)))))
(use-modules (guix store)
(guix self)
(guix derivations)
(srfi srfi-1))
(define (spin system)
(define spin
(circular-list "-" "\\" "|" "/" "-" "\\" "|" "/"))
(format (current-error-port)
"Computing Guix derivation for '~a'... "
system)
(let loop ((spin spin))
(display (string-append "\b" (car spin))
(current-error-port))
(force-output (current-error-port))
(sleep 1)
(loop (cdr spin))))
(match (command-line)
((_ _ system)
(with-store store
(call-with-new-thread
(lambda ()
(spin system)))
(display
(and=>
(run-with-store store
(guix-derivation #$source #$version
#$guile-version
#:pull-version
#$pull-version)
#:system system)
derivation-file-name))))))
#:module-path (list source))))
;; The procedure below is our return value.
(define* (build source
#:key verbose? (version (date-version-string)) system
(guile-version (match ((@ (guile) version))
("2.2.2" "2.2.2")
(_ (effective-version))))
(pull-version 0)
#:allow-other-keys
#:rest rest)
"Return a derivation that unpacks SOURCE into STORE and compiles Scheme
files."
;; Build the build program and then use it as a trampoline to build from
;; SOURCE.
(mlet %store-monad ((build (build-program source version guile-version
#:pull-version pull-version))
(system (if system (return system) (current-system))))
(mbegin %store-monad
(show-what-to-build* (list build))
(built-derivations (list build))
(let* ((pipe (begin
(setenv "GUILE_WARN_DEPRECATED" "no") ;be quiet and drive
(open-pipe* OPEN_READ
(derivation->output-path build)
source system)))
(str (get-string-all pipe))
(status (close-pipe pipe)))
(match str
((? eof-object?)
(error "build program failed" (list build status)))
((? derivation-path? drv)
(mbegin %store-monad
(return (newline (current-output-port)))
((store-lift add-temp-root) drv)
(return (read-derivation-from-file drv))))
("#f"
;; Unsupported PULL-VERSION.
(return #f))
((? string? str)
(error "invalid build result" (list build str))))))))
;; 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