Mirror of GNU Guix
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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2012, 2013, 2014, 2015, 2016, 2017, 2018 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2018 Mark H Weaver <mhw@netris.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 (guix build gremlin)
#:use-module (guix elf)
#:use-module (ice-9 ftw)
#:use-module (ice-9 match)
#:use-module (ice-9 regex)
#:use-module (ice-9 format)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-19)
#:use-module (srfi srfi-34)
#:use-module (srfi srfi-35)
#:use-module (srfi srfi-26)
#:use-module (rnrs io ports)
#:export (%standard-phases
%license-file-regexp
dump-file-contents
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:
(cond-expand
(guile-2.2
;; Guile 2.2.2 has a bug whereby 'time-monotonic' objects have seconds and
;; nanoseconds swapped (fixed in Guile commit 886ac3e). Work around it.
(define time-monotonic time-tai))
(else #t))
(define* (set-SOURCE-DATE-EPOCH #:rest _)
"Set the 'SOURCE_DATE_EPOCH' environment variable. This is used by tools
that incorporate timestamps as a way to tell them to use a fixed timestamp.
See https://reproducible-builds.org/specs/source-date-epoch/."
(setenv "SOURCE_DATE_EPOCH" "1")
#t)
(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
'())))
;; Tell 'ld-wrapper' to disallow non-store libraries.
(setenv "GUIX_LD_WRAPPER_ALLOW_IMPURITIES" "no")
;; 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 (files ...) separator type pattern)
(set-path-environment-variable env-var files
input-directories
#:separator separator
#:type type
#:pattern pattern)))
search-paths)
(when native-search-paths
;; Search paths for native inputs, when cross building.
(for-each (match-lambda
((env-var (files ...) separator type pattern)
(set-path-environment-variable env-var files
native-input-directories
#:separator separator
#:type type
#:pattern pattern)))
native-search-paths))
#t)
(define* (install-locale #:key
(locale "en_US.utf8")
(locale-category LC_ALL)
#:allow-other-keys)
"Try to install LOCALE; emit a warning if that fails. The main goal is to
use a UTF-8 locale so that Guile correctly interprets UTF-8 file names.
This phase must typically happen after 'set-paths' so that $LOCPATH has a
chance to be set."
(catch 'system-error
(lambda ()
(setlocale locale-category locale)
;; While we're at it, pass it to sub-processes.
(setenv (locale-category->string locale-category) locale)
(format (current-error-port) "using '~a' locale for category ~s~%"
locale (locale-category->string locale-category))
#t)
(lambda args
;; This is known to fail for instance in early bootstrap where locales
;; are not available.
(format (current-error-port)
"warning: failed to install '~a' locale: ~a~%"
locale (strerror (system-error-errno args)))
#t)))
(define* (unpack #:key source #:allow-other-keys)
"Unpack SOURCE in the working directory, and change directory within the
source. When SOURCE is a directory, copy it in a sub-directory of the current
working directory."
(if (file-is-directory? source)
(begin
(mkdir "source")
(chdir "source")
;; Preserve timestamps (set to the Epoch) on the copied tree so that
;; things work deterministically.
(copy-recursively source "."
#:keep-mtime? #t))
(begin
(if (string-suffix? ".zip" source)
(invoke "unzip" source)
(invoke "tar" "xvf" source))
(chdir (first-subdirectory "."))))
#t)
(define %bootstrap-scripts
;; Typical names of Autotools "bootstrap" scripts.
'("bootstrap" "bootstrap.sh" "autogen.sh"))
(define* (bootstrap #:key (bootstrap-scripts %bootstrap-scripts)
#:allow-other-keys)
"If the code uses Autotools and \"configure\" is missing, run
\"autoreconf\". Otherwise do nothing."
;; Note: Run that right after 'unpack' so that the generated files are
;; visible when the 'patch-source-shebangs' phase runs.
(if (not (file-exists? "configure"))
;; First try one of the BOOTSTRAP-SCRIPTS. If none exists, and it's
;; clearly an Autoconf-based project, run 'autoreconf'. Otherwise, do
;; nothing (perhaps the user removed or overrode the 'configure' phase.)
(let ((script (find file-exists? bootstrap-scripts)))
;; GNU packages often invoke the 'git-version-gen' script from
;; 'configure.ac' so make sure it has a valid shebang.
(false-if-file-not-found
(patch-shebang "build-aux/git-version-gen"))
(if script
(let ((script (string-append "./" script)))
(format #t "running '~a'~%" script)
(if (executable-file? script)
(begin
(patch-shebang script)
(invoke script))
(invoke "sh" script)))
(if (or (file-exists? "configure.ac")
(file-exists? "configure.in"))
(invoke "autoreconf" "-vif")
(format #t "no 'configure.ac' or anything like that, \
doing nothing~%"))))
(format #t "GNU build system bootstrapping not needed~%"))
#t)
;; See <http://bugs.gnu.org/17840>.
(define* (patch-usr-bin-file #:key native-inputs inputs
(patch-/usr/bin/file? #t)
#:allow-other-keys)
"Patch occurrences of \"/usr/bin/file\" in all the executable 'configure'
files found in the source tree. This works around Libtool's Autoconf macros,
which generates invocations of \"/usr/bin/file\" that are used to determine
things like the ABI being used."
(when patch-/usr/bin/file?
(for-each (lambda (file)
(when (executable-file? file)
(patch-/usr/bin/file file)))
(find-files "." "^configure$")))
#t)
(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
$CONFIG_SHELL, but some don't, such as `mkinstalldirs' or Automake's
`missing' script."
(for-each patch-shebang
(find-files "."
(lambda (file stat)
;; Filter out symlinks.
(eq? 'regular (stat:type stat)))
#:stat lstat))
#t)
(define (patch-generated-file-shebangs . rest)
"Patch shebangs in generated files, including `SHELL' variables in
makefiles."
;; Patch executable regular files, some of which might have been generated
;; by `configure'.
(for-each patch-shebang
(find-files "."
(lambda (file stat)
(and (eq? 'regular (stat:type stat))
(not (zero? (logand (stat:mode stat) #o100)))))
#:stat lstat))
;; Patch `SHELL' in generated makefiles.
(for-each patch-makefile-SHELL (find-files "." "^(GNU)?[mM]akefile$"))
#t)
(define* (configure #:key build 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
"/share/doc/" (package-name)))
'())
,@(if build
(list (string-append "--build=" build))
'())
,@(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.
(apply invoke bash
(string-append srcdir "/configure")
flags)))
(define* (build #:key (make-flags '()) (parallel-build? #t)
#:allow-other-keys)
(apply invoke "make"
`(,@(if parallel-build?
`("-j" ,(number->string (parallel-job-count)))
'())
,@make-flags)))
(define* (dump-file-contents directory file-regexp
#:optional (port (current-error-port)))
"Dump to PORT the contents of files in DIRECTORY that match FILE-REGEXP."
(define (dump file)
(let ((prefix (string-append "\n--- " file " ")))
(display (if (< (string-length prefix) 78)
(string-pad-right prefix 78 #\-)
prefix)
port)
(display "\n\n" port)
(call-with-input-file file
(lambda (log)
(dump-port log port)))
(display "\n" port)))
(for-each dump (find-files directory file-regexp)))
(define %test-suite-log-regexp
;; Name of test suite log files as commonly found in GNU-based build systems
;; and CMake.
"^(test-?suite\\.log|LastTestFailed\\.log)$")
(define* (check #:key target (make-flags '()) (tests? (not target))
(test-target "check") (parallel-tests? #t)
(test-suite-log-regexp %test-suite-log-regexp)
#:allow-other-keys)
(if tests?
(guard (c ((invoke-error? c)
;; Dump the test suite log to facilitate debugging.
(display "\nTest suite failed, dumping logs.\n"
(current-error-port))
(dump-file-contents "." test-suite-log-regexp)
(raise c)))
(apply invoke "make" test-target
`(,@(if parallel-tests?
`("-j" ,(number->string (parallel-job-count)))
'())
,@make-flags)))
(format #t "test suite not run~%"))
#t)
(define* (install #:key (make-flags '()) #:allow-other-keys)
(apply invoke "make" "install" make-flags))
(define* (patch-shebangs #:key inputs outputs (patch-shebangs? #t)
#:allow-other-keys)
(define (list-of-files dir)
(map (cut string-append dir "/" <>)
(or (scandir dir (lambda (f)
(let ((s (lstat (string-append dir "/" f))))
(eq? 'regular (stat:type s)))))
'())))
(define bin-directories
(match-lambda
((_ . dir)
(list (string-append dir "/bin")
(string-append dir "/sbin")))))
(define output-bindirs
(append-map bin-directories outputs))
(define input-bindirs
;; Shebangs should refer to binaries of the target system---i.e., from
;; "inputs", not from "native-inputs".
(append-map bin-directories inputs))
(when patch-shebangs?
(let ((path (append output-bindirs input-bindirs)))
(for-each (lambda (dir)
(let ((files (list-of-files dir)))
(for-each (cut patch-shebang <> path) files)))
output-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"
"--enable-deterministic-archives"))
(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)
(invoke strip-command "--only-keep-debug" debug)
(chmod debug #o400)))
(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.
(invoke objcopy-command "--enable-deterministic-archives"
(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))
(for-each (lambda (file)
(when (or (elf-file? file) (ar-file? file))
;; If an error occurs while processing a file, issue a
;; warning and continue to the next file.
(guard (c ((invoke-error? c)
(format (current-error-port)
"warning: ~a: program ~s exited\
~@[ with non-zero exit status ~a~]\
~@[ terminated by signal ~a~]~%"
file
(invoke-error-program c)
(invoke-error-exit-status c)
(invoke-error-term-signal c))))
(when debug-output
(make-debug-file file))
;; Ensure the file is writable.
(make-file-writable file)
(apply invoke strip-command
(append strip-flags (list file)))
(when debug-output
(add-debug-link file)))))
(find-files dir
(lambda (file stat)
;; Ignore symlinks such as:
;; libfoo.so -> libfoo.so.0.0.
(eq? 'regular (stat:type stat)))
#:stat lstat)))
(when strip-binaries?
(for-each
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)))
#t)
(define* (validate-runpath #:key
(validate-runpath? #t)
(elf-directories '("lib" "lib64" "libexec"
"bin" "sbin"))
outputs #:allow-other-keys)
"When VALIDATE-RUNPATH? is true, validate that all the ELF files in
ELF-DIRECTORIES have their dependencies found in their 'RUNPATH'.
Since the ELF parser needs to have a copy of files in memory, better run this
phase after stripping."
(define (sub-directory parent)
(lambda (directory)
(let ((directory (string-append parent "/" directory)))
(and (directory-exists? directory) directory))))
(define (validate directory)
(define (file=? file1 file2)
(let ((st1 (stat file1))
(st2 (stat file2)))
(= (stat:ino st1) (stat:ino st2))))
;; There are always symlinks from '.so' to '.so.1' and so on, so delete
;; duplicates.
(let ((files (delete-duplicates (find-files directory (lambda (file stat)
(elf-file? file)))
file=?)))
(format (current-error-port)
"validating RUNPATH of ~a binaries in ~s...~%"
(length files) directory)
(every* validate-needed-in-runpath files)))
(if validate-runpath?
(let ((dirs (append-map (match-lambda
(("debug" . _)
;; The "debug" output is full of ELF files
;; that are not worth checking.
'())
((name . output)
(filter-map (sub-directory output)
elf-directories)))
outputs)))
(unless (every* validate dirs)
(error "RUNPATH validation failed")))
(format (current-error-port) "skipping RUNPATH validation~%"))
#t)
(define* (validate-documentation-location #:key outputs
#:allow-other-keys)
"Documentation should go to 'share/info' and 'share/man', not just 'info/'
and 'man/'. This phase moves directories to the right place if needed."
(define (validate-sub-directory output sub-directory)
(let ((directory (string-append output "/" sub-directory)))
(when (directory-exists? directory)
(let ((target (string-append output "/share/" sub-directory)))
(format #t "moving '~a' to '~a'~%" directory target)
(mkdir-p (dirname target))
(rename-file directory target)))))
(define (validate-output output)
(for-each (cut validate-sub-directory output <>)
'("man" "info")))
(match outputs
(((names . directories) ...)
(for-each validate-output directories)))
#t)
(define* (reset-gzip-timestamps #:key outputs #:allow-other-keys)
"Reset embedded timestamps in gzip files found in OUTPUTS."
(define (process-directory directory)
(let ((files (find-files directory
(lambda (file stat)
(and (eq? 'regular (stat:type stat))
(or (string-suffix? ".gz" file)
(string-suffix? ".tgz" file))
(gzip-file? file)))
#:stat lstat)))
(for-each reset-gzip-timestamp files)))
(match outputs
(((names . directories) ...)
(for-each process-directory directories)))
#t)
(define* (compress-documentation #:key outputs
(compress-documentation? #t)
(documentation-compressor "gzip")
(documentation-compressor-flags
'("--best" "--no-name"))
(compressed-documentation-extension ".gz")
#:allow-other-keys)
"When COMPRESS-DOCUMENTATION? is true, compress man pages and Info files
found in OUTPUTS using DOCUMENTATION-COMPRESSOR, called with
DOCUMENTATION-COMPRESSOR-FLAGS."
(define (retarget-symlink link)
(let ((target (readlink link)))
(delete-file link)
(symlink (string-append target compressed-documentation-extension)
link)))
(define (has-links? file)
;; Return #t if FILE has hard links.
(> (stat:nlink (lstat file)) 1))
(define (points-to-symlink? symlink)
;; Return #t if SYMLINK points to another symbolic link.
(let* ((target (readlink symlink))
(target-absolute (if (string-prefix? "/" target)
target
(string-append (dirname symlink)
"/" target))))
(catch 'system-error
(lambda ()
(symbolic-link? target-absolute))
(lambda args
(if (= ENOENT (system-error-errno args))
(begin
(format (current-error-port)
"The symbolic link '~a' target is missing: '~a'\n"
symlink target-absolute)
#f)
(apply throw args))))))
(define (maybe-compress-directory directory regexp)
(when (directory-exists? directory)
(match (find-files directory regexp)
(() ;nothing to compress
#t)
((files ...) ;one or more files
(format #t
"compressing documentation in '~a' with ~s and flags ~s~%"
directory documentation-compressor
documentation-compressor-flags)
(call-with-values
(lambda ()
(partition symbolic-link? files))
(lambda (symlinks regular-files)
;; Compress the non-symlink files, and adjust symlinks to refer
;; to the compressed files. Leave files that have hard links
;; unchanged ('gzip' would refuse to compress them anyway.)
;; Also, do not retarget symbolic links pointing to other
;; symbolic links, since these are not compressed.
(for-each retarget-symlink
(filter (lambda (symlink)
(and (not (points-to-symlink? symlink))
(string-match regexp symlink)))
symlinks))
(apply invoke documentation-compressor
(append documentation-compressor-flags
(remove has-links? regular-files)))))))))
(define (maybe-compress output)
(maybe-compress-directory (string-append output "/share/man")
"\\.[0-9]+$")
(maybe-compress-directory (string-append output "/share/info")
"\\.info(-[0-9]+)?$"))
(if compress-documentation?
(match outputs
(((names . directories) ...)
(for-each maybe-compress directories)))
(format #t "not compressing documentation~%"))
#t)
(define* (delete-info-dir-file #:key outputs #:allow-other-keys)
"Delete any 'share/info/dir' file from OUTPUTS."
(for-each (match-lambda
((output . directory)
(let ((info-dir-file (string-append directory "/share/info/dir")))
(when (file-exists? info-dir-file)
(delete-file info-dir-file)))))
outputs)
#t)
(define* (patch-dot-desktop-files #:key outputs inputs #:allow-other-keys)
"Replace any references to executables in '.desktop' files with their
absolute file names."
(define bin-directories
(append-map (match-lambda
((_ . directory)
(list (string-append directory "/bin")
(string-append directory "/sbin"))))
outputs))
(define (which program)
(or (search-path bin-directories program)
(begin
(format (current-error-port)
"warning: '.desktop' file refers to '~a', \
which cannot be found~%"
program)
program)))
(for-each (match-lambda
((_ . directory)
(let ((applications (string-append directory
"/share/applications")))
(when (directory-exists? applications)
(let ((files (find-files applications "\\.desktop$")))
(format #t "adjusting ~a '.desktop' files in ~s~%"
(length files) applications)
;; '.desktop' files contain translations and are always
;; UTF-8-encoded.
(with-fluids ((%default-port-encoding "UTF-8"))
(substitute* files
(("^Exec=([^/[:blank:]\r\n]*)(.*)$" _ binary rest)
(string-append "Exec=" (which binary) rest))
(("^TryExec=([^/[:blank:]\r\n]*)(.*)$" _ binary rest)
(string-append "TryExec="
(which binary) rest)))))))))
outputs)
#t)
(define %license-file-regexp
;; Regexp matching license files.
"^(COPYING.*|LICEN[CS]E.*|[Ll]icen[cs]e.*|Copy[Rr]ight(\\.(txt|md))?)$")
(define* (install-license-files #:key outputs
(license-file-regexp %license-file-regexp)
#:allow-other-keys)
"Install license files matching LICENSE-FILE-REGEXP to 'share/doc'."
(let* ((regexp (make-regexp license-file-regexp))
(out (or (assoc-ref outputs "out")
(match outputs
(((_ . output) _ ...)
output))))
(package (strip-store-file-name out))
(directory (string-append out "/share/doc/" package))
(files (scandir "." (lambda (file)
(regexp-exec regexp file)))))
(format #t "installing ~a license files~%" (length files))
(for-each (lambda (file)
(if (file-is-directory? file)
(copy-recursively file directory)
(install-file file directory)))
files)
#t))
(define %standard-phases
;; Standard build phases, as a list of symbol/procedure pairs.
(let-syntax ((phases (syntax-rules ()
((_ p ...) `((p . ,p) ...)))))
(phases set-SOURCE-DATE-EPOCH set-paths install-locale unpack
bootstrap
patch-usr-bin-file
patch-source-shebangs configure patch-generated-file-shebangs
build check install
patch-shebangs strip
validate-runpath
validate-documentation-location
delete-info-dir-file
patch-dot-desktop-files
install-license-files
reset-gzip-timestamps
compress-documentation)))
(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."
(define (elapsed-time end start)
(let ((diff (time-difference end start)))
(+ (time-second diff)
(/ (time-nanosecond diff) 1e9))))
(setvbuf (current-output-port) _IOLBF)
(setvbuf (current-error-port) _IOLBF)
;; Encoding/decoding errors shouldn't be silent.
(fluid-set! %default-port-conversion-strategy 'error)
;; The trick is to #:allow-other-keys everywhere, so that each procedure in
;; PHASES can pick the keyword arguments it's interested in.
(for-each (match-lambda
((name . proc)
(let ((start (current-time time-monotonic)))
(format #t "starting phase `~a'~%" name)
(let ((result (apply proc args))
(end (current-time time-monotonic)))
(format #t "phase `~a' ~:[failed~;succeeded~] after ~,1f seconds~%"
name result
(elapsed-time end start))
;; Issue a warning unless the result is #t.
(unless (eqv? result #t)
(format (current-error-port) "\
## WARNING: phase `~a' returned `~s'. Return values other than #t
## are deprecated. Please migrate this package so that its phase
## procedures report errors by raising an exception, and otherwise
## always return #t.~%"
name result))
;; Dump the environment variables as a shell script, for handy debugging.
(system "export > $NIX_BUILD_TOP/environment-variables")
result))))
phases))