Mirror of GNU Guix
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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2012, 2013 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 (guix build gnu-build-system)
#:use-module (guix build utils)
#:use-module (ice-9 ftw)
#:use-module (ice-9 match)
#:use-module (ice-9 format)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-26)
#:export (%standard-phases
gnu-build))
;; Commentary:
;;
;; Standard build procedure for packages using the GNU Build System or
;; something compatible ("./configure && make && make install"). This is the
;; builder-side code.
;;
;; Code:
(define (first-subdirectory dir)
"Return the path of the first sub-directory of DIR."
(file-system-fold (lambda (path stat result)
(string=? path dir))
(lambda (path stat result) result) ; leaf
(lambda (path stat result) result) ; down
(lambda (path stat result) result) ; up
(lambda (path stat result) ; skip
(or result path))
(lambda (path stat errno result) ; error
(error "first-subdirectory" (strerror errno)))
#f
dir))
(define* (set-paths #:key target inputs native-inputs
(search-paths '()) (native-search-paths '())
#:allow-other-keys)
(define input-directories
(match inputs
(((_ . dir) ...)
dir)))
(define native-input-directories
(match native-inputs
(((_ . dir) ...)
dir)
(#f ; not cross compiling
'())))
;; When cross building, $PATH must refer only to native (host) inputs since
;; target inputs are not executable.
(set-path-environment-variable "PATH" '("bin" "sbin")
(append native-input-directories
(if target
'()
input-directories)))
(for-each (match-lambda
((env-var (directories ...) separator)
(set-path-environment-variable env-var directories
input-directories
#:separator separator)))
search-paths)
(when native-search-paths
;; Search paths for native inputs, when cross building.
(for-each (match-lambda
((env-var (directories ...) separator)
(set-path-environment-variable env-var directories
native-input-directories
#:separator separator)))
native-search-paths))
#t)
(define* (unpack #:key source #:allow-other-keys)
(and (zero? (system* "tar" "xvf" source))
(chdir (first-subdirectory "."))))
(define* (patch-source-shebangs #:key source #:allow-other-keys)
"Patch shebangs in all source files; this includes non-executable
files such as `.in' templates. Most scripts honor $SHELL and
$CONFIG_SHELL, but some don't, such as `mkinstalldirs' or Automake's
`missing' script."
(for-each patch-shebang
(remove file-is-directory? (find-files "." ".*"))))
(define (patch-generated-file-shebangs . rest)
"Patch shebangs in generated files, including `SHELL' variables in
makefiles."
;; Patch executable files, some of which might have been generated by
;; `configure'.
(for-each patch-shebang
(filter (lambda (file)
(and (executable-file? file)
(not (file-is-directory? file))))
(find-files "." ".*")))
;; Patch `SHELL' in generated makefiles.
(for-each patch-makefile-SHELL (find-files "." "^(GNU)?[mM]akefile$")))
(define* (configure #:key target native-inputs inputs outputs
(configure-flags '()) out-of-source?
#:allow-other-keys)
(define (package-name)
(let* ((out (assoc-ref outputs "out"))
(base (basename out))
(dash (string-rindex base #\-)))
;; XXX: We'd rather use `package-name->name+version' or similar.
(string-drop (if dash
(substring base 0 dash)
base)
(+ 1 (string-index base #\-)))))
(let* ((prefix (assoc-ref outputs "out"))
(bindir (assoc-ref outputs "bin"))
(libdir (assoc-ref outputs "lib"))
(includedir (assoc-ref outputs "include"))
(docdir (assoc-ref outputs "doc"))
(bash (or (and=> (assoc-ref (or native-inputs inputs) "bash")
(cut string-append <> "/bin/bash"))
"/bin/sh"))
(flags `(,@(if target ; cross building
'("CC_FOR_BUILD=gcc")
'())
,(string-append "CONFIG_SHELL=" bash)
,(string-append "SHELL=" bash)
,(string-append "--prefix=" prefix)
"--enable-fast-install" ; when using Libtool
;; Produce multiple outputs when specific output names
;; are recognized.
,@(if bindir
(list (string-append "--bindir=" bindir "/bin"))
'())
,@(if libdir
(cons (string-append "--libdir=" libdir "/lib")
(if includedir
'()
(list
(string-append "--includedir="
libdir "/include"))))
'())
,@(if includedir
(list (string-append "--includedir="
includedir "/include"))
'())
,@(if docdir
(list (string-append "--docdir=" docdir
"/doc/" (package-name)))
'())
,@(if target ; cross building
(list (string-append "--host=" target))
'())
,@configure-flags))
(abs-srcdir (getcwd))
(srcdir (if out-of-source?
(string-append "../" (basename abs-srcdir))
".")))
(format #t "source directory: ~s (relative from build: ~s)~%"
abs-srcdir srcdir)
(if out-of-source?
(begin
(mkdir "../build")
(chdir "../build")))
(format #t "build directory: ~s~%" (getcwd))
(format #t "configure flags: ~s~%" flags)
;; Use BASH to reduce reliance on /bin/sh since it may not always be
;; reliable (see
;; <http://thread.gmane.org/gmane.linux.distributions.nixos/9748>
;; for a summary of the situation.)
;;
;; Call `configure' with a relative path. Otherwise, GCC's build system
;; (for instance) records absolute source file names, which typically
;; contain the hash part of the `.drv' file, leading to a reference leak.
(zero? (apply system* bash
(string-append srcdir "/configure")
flags))))
(define %parallel-job-count
;; String to be passed next to GNU Make's `-j' argument.
(match (getenv "NIX_BUILD_CORES")
(#f "1")
("0" (number->string (current-processor-count)))
(x x)))
(define* (build #:key (make-flags '()) (parallel-build? #t)
#:allow-other-keys)
(zero? (apply system* "make"
`(,@(if parallel-build?
`("-j" ,%parallel-job-count)
'())
,@make-flags))))
(define* (check #:key target (make-flags '()) (tests? (not target))
(test-target "check") (parallel-tests? #t)
#:allow-other-keys)
(if tests?
(zero? (apply system* "make" test-target
`(,@(if parallel-tests?
`("-j" ,%parallel-job-count)
'())
,@make-flags)))
(begin
(format #t "test suite not run~%")
#t)))
(define* (install #:key (make-flags '()) #:allow-other-keys)
(zero? (apply system* "make" "install" make-flags)))
(define* (patch-shebangs #:key outputs (patch-shebangs? #t)
#:allow-other-keys)
(define (list-of-files dir)
(map (cut string-append dir "/" <>)
(or (scandir dir (lambda (f)
(let ((s (stat (string-append dir "/" f))))
(eq? 'regular (stat:type s)))))
'())))
(define bindirs
(append-map (match-lambda
((_ . dir)
(list (string-append dir "/bin")
(string-append dir "/sbin"))))
outputs))
(when patch-shebangs?
(let ((path (append bindirs
(search-path-as-string->list (getenv "PATH")))))
(for-each (lambda (dir)
(let ((files (list-of-files dir)))
(for-each (cut patch-shebang <> path) files)))
bindirs)))
#t)
(define* (strip #:key target outputs (strip-binaries? #t)
(strip-command (if target
(string-append target "-strip")
"strip"))
(objcopy-command (if target
(string-append target "-objcopy")
"objcopy"))
(strip-flags '("--strip-debug"))
(strip-directories '("lib" "lib64" "libexec"
"bin" "sbin"))
#:allow-other-keys)
(define debug-output
;; If an output is called "debug", then that's where debugging information
;; will be stored instead of being discarded.
(assoc-ref outputs "debug"))
(define debug-file-extension
;; File name extension for debugging information.
".debug")
(define (debug-file file)
;; Return the name of the debug file for FILE, an absolute file name.
;; Once installed in the user's profile, it is in $PROFILE/lib/debug/FILE,
;; which is where GDB looks for it (info "(gdb) Separate Debug Files").
(string-append debug-output "/lib/debug/"
file debug-file-extension))
(define (make-debug-file file)
;; Create a file in DEBUG-OUTPUT containing the debugging info of FILE.
(let ((debug (debug-file file)))
(mkdir-p (dirname debug))
(copy-file file debug)
(and (zero? (system* strip-command "--only-keep-debug" debug))
(begin
(chmod debug #o400)
#t))))
(define (add-debug-link file)
;; Add a debug link in FILE (info "(binutils) strip").
;; `objcopy --add-gnu-debuglink' wants to have the target of the debug
;; link around so it can compute a CRC of that file (see the
;; `bfd_fill_in_gnu_debuglink_section' function.) No reference to
;; DEBUG-OUTPUT is kept because bfd keeps only the basename of the debug
;; file.
(zero? (system* objcopy-command
(string-append "--add-gnu-debuglink="
(debug-file file))
file)))
(define (strip-dir dir)
(format #t "stripping binaries in ~s with ~s and flags ~s~%"
dir strip-command strip-flags)
(when debug-output
(format #t "debugging output written to ~s using ~s~%"
debug-output objcopy-command))
(file-system-fold (const #t)
(lambda (path stat result) ; leaf
(and (or (not debug-output)
(make-debug-file path))
(zero? (apply system* strip-command
(append strip-flags (list path))))
(or (not debug-output)
(add-debug-link path))))
(const #t) ; down
(const #t) ; up
(const #t) ; skip
(lambda (path stat errno result)
(format (current-error-port)
"strip: failed to access `~a': ~a~%"
path (strerror errno))
#f)
#t
dir))
(or (not strip-binaries?)
(every strip-dir
(append-map (match-lambda
((_ . dir)
(filter-map (lambda (d)
(let ((sub (string-append dir "/" d)))
(and (directory-exists? sub) sub)))
strip-directories)))
outputs))))
(define %standard-phases
;; Standard build phases, as a list of symbol/procedure pairs.
(let-syntax ((phases (syntax-rules ()
((_ p ...) `((p . ,p) ...)))))
(phases set-paths unpack
patch-source-shebangs configure patch-generated-file-shebangs
build check install
patch-shebangs strip)))
(define* (gnu-build #:key (source #f) (outputs #f) (inputs #f)
(phases %standard-phases)
#:allow-other-keys
#:rest args)
"Build from SOURCE to OUTPUTS, using INPUTS, and by running all of PHASES
in order. Return #t if all the PHASES succeeded, #f otherwise."
(setvbuf (current-output-port) _IOLBF)
(setvbuf (current-error-port) _IOLBF)
;; The trick is to #:allow-other-keys everywhere, so that each procedure in
;; PHASES can pick the keyword arguments it's interested in.
(every (match-lambda
((name . proc)
(let ((start (gettimeofday)))
(format #t "starting phase `~a'~%" name)
(let ((result (apply proc args))
(end (gettimeofday)))
(format #t "phase `~a' ~:[failed~;succeeded~] after ~a seconds~%"
name result (- (car end) (car start)))
;; Dump the environment variables as a shell script, for handy debugging.
(system "export > $NIX_BUILD_TOP/environment-variables")
result))))
phases))