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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2012, 2013 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2013 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 scripts build)
#:use-module (guix ui)
#:use-module (guix store)
#:use-module (guix derivations)
#:use-module (guix packages)
#:use-module (guix utils)
#:use-module (ice-9 format)
#:use-module (ice-9 match)
#:use-module (ice-9 vlist)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-11)
#:use-module (srfi srfi-26)
#:use-module (srfi srfi-34)
#:use-module (srfi srfi-37)
#:autoload (gnu packages) (find-packages-by-name
find-newest-available-packages)
#:export (guix-build))
(define %store
(make-parameter #f))
(define (derivations-from-package-expressions exp system source?)
"Eval EXP and return the corresponding derivation path for SYSTEM.
When SOURCE? is true, return the derivations of the package sources."
(let ((p (eval exp (current-module))))
(if (package? p)
(if source?
(let ((source (package-source p))
(loc (package-location p)))
(if source
(package-source-derivation (%store) source)
(leave (_ "~a: error: package `~a' has no source~%")
(location->string loc) (package-name p))))
(package-derivation (%store) p system))
(leave (_ "expression `~s' does not evaluate to a package~%")
exp))))
;;;
;;; Command-line options.
;;;
(define %default-options
;; Alist of default option values.
`((system . ,(%current-system))
(substitutes? . #t)
(verbosity . 0)))
(define (show-help)
(display (_ "Usage: guix build [OPTION]... PACKAGE-OR-DERIVATION...
Build the given PACKAGE-OR-DERIVATION and return their output paths.\n"))
(display (_ "
-e, --expression=EXPR build the package EXPR evaluates to"))
(display (_ "
-S, --source build the packages' source derivations"))
(display (_ "
-s, --system=SYSTEM attempt to build for SYSTEM--e.g., \"i686-linux\""))
(display (_ "
-d, --derivations return the derivation paths of the given packages"))
(display (_ "
-K, --keep-failed keep build tree of failed builds"))
(display (_ "
-n, --dry-run do not build the derivations"))
(display (_ "
--no-substitutes build instead of resorting to pre-built substitutes"))
(display (_ "
-c, --cores=N allow the use of up to N CPU cores for the build"))
(display (_ "
-r, --root=FILE make FILE a symlink to the result, and register it
as a garbage collector root"))
(display (_ "
--verbosity=LEVEL use the given verbosity LEVEL"))
(newline)
(display (_ "
-h, --help display this help and exit"))
(display (_ "
-V, --version display version information and exit"))
(newline)
(show-bug-report-information))
(define %options
;; Specifications of the command-line options.
(list (option '(#\h "help") #f #f
(lambda args
(show-help)
(exit 0)))
(option '(#\V "version") #f #f
(lambda args
(show-version-and-exit "guix-build")))
(option '(#\S "source") #f #f
(lambda (opt name arg result)
(alist-cons 'source? #t result)))
(option '(#\s "system") #t #f
(lambda (opt name arg result)
(alist-cons 'system arg
(alist-delete 'system result eq?))))
(option '(#\d "derivations") #f #f
(lambda (opt name arg result)
(alist-cons 'derivations-only? #t result)))
(option '(#\e "expression") #t #f
(lambda (opt name arg result)
(alist-cons 'expression
(call-with-input-string arg read)
result)))
(option '(#\K "keep-failed") #f #f
(lambda (opt name arg result)
(alist-cons 'keep-failed? #t result)))
(option '(#\c "cores") #t #f
(lambda (opt name arg result)
(let ((c (false-if-exception (string->number arg))))
(if c
(alist-cons 'cores c result)
(leave (_ "~a: not a number~%") arg)))))
(option '(#\n "dry-run") #f #f
(lambda (opt name arg result)
(alist-cons 'dry-run? #t result)))
(option '("no-substitutes") #f #f
(lambda (opt name arg result)
(alist-cons 'substitutes? #f
(alist-delete 'substitutes? result))))
(option '(#\r "root") #t #f
(lambda (opt name arg result)
(alist-cons 'gc-root arg result)))
(option '("verbosity") #t #f
(lambda (opt name arg result)
(let ((level (string->number arg)))
(alist-cons 'verbosity level
(alist-delete 'verbosity result)))))))
;;;
;;; Entry point.
;;;
(define (guix-build . args)
(define (parse-options)
;; Return the alist of option values.
(args-fold args %options
(lambda (opt name arg result)
(leave (_ "~A: unrecognized option~%") name))
(lambda (arg result)
(alist-cons 'argument arg result))
%default-options))
(define (register-root paths root)
;; Register ROOT as an indirect GC root for all of PATHS.
(let* ((root (string-append (canonicalize-path (dirname root))
"/" root)))
(catch 'system-error
(lambda ()
(match paths
((path)
(symlink path root)
(add-indirect-root (%store) root))
((paths ...)
(fold (lambda (path count)
(let ((root (string-append root "-" (number->string count))))
(symlink path root)
(add-indirect-root (%store) root))
(+ 1 count))
0
paths))))
(lambda args
(format (current-error-port)
(_ "failed to create GC root `~a': ~a~%")
root (strerror (system-error-errno args)))
(exit 1)))))
(define newest-available-packages
(memoize find-newest-available-packages))
(define (find-best-packages-by-name name version)
(if version
(find-packages-by-name name version)
(match (vhash-assoc name (newest-available-packages))
((_ version pkgs ...) pkgs)
(#f '()))))
(define (find-package request)
;; Return a package matching REQUEST. REQUEST may be a package
;; name, or a package name followed by a hyphen and a version
;; number. If the version number is not present, return the
;; preferred newest version.
(let-values (((name version)
(package-name->name+version request)))
(match (find-best-packages-by-name name version)
((p) ; one match
p)
((p x ...) ; several matches
(format (current-error-port)
(_ "warning: ambiguous package specification `~a'~%")
request)
(format (current-error-port)
(_ "warning: choosing ~a from ~a~%")
(package-full-name p)
(location->string (package-location p)))
p)
(_ ; no matches
(if version
(leave (_ "~A: package not found for version ~a~%")
name version)
(leave (_ "~A: unknown package~%") name))))))
(with-error-handling
(let ((opts (parse-options)))
(parameterize ((%store (open-connection)))
(let* ((src? (assoc-ref opts 'source?))
(sys (assoc-ref opts 'system))
(drv (filter-map (match-lambda
(('expression . exp)
(derivations-from-package-expressions exp sys
src?))
(('argument . (? derivation-path? drv))
drv)
(('argument . (? string? x))
(let ((p (find-package x)))
(if src?
(let ((s (package-source p)))
(package-source-derivation
(%store) s))
(package-derivation (%store) p sys))))
(_ #f))
opts))
(req (append-map (lambda (drv-path)
(let ((d (call-with-input-file drv-path
read-derivation)))
(derivation-prerequisites-to-build (%store) d)))
drv))
(req* (delete-duplicates
(append (remove (compose (cut valid-path? (%store) <>)
derivation-path->output-path)
drv)
(map derivation-input-path req))))
(roots (filter-map (match-lambda
(('gc-root . root) root)
(_ #f))
opts)))
(if (assoc-ref opts 'dry-run?)
(format (current-error-port)
(N_ "~:[the following derivation would be built:~%~{ ~a~%~}~;~]"
"~:[the following derivations would be built:~%~{ ~a~%~}~;~]"
(length req*))
(null? req*) req*)
(format (current-error-port)
(N_ "~:[the following derivation will be built:~%~{ ~a~%~}~;~]"
"~:[the following derivations will be built:~%~{ ~a~%~}~;~]"
(length req*))
(null? req*) req*))
;; TODO: Add more options.
(set-build-options (%store)
#:keep-failed? (assoc-ref opts 'keep-failed?)
#:build-cores (or (assoc-ref opts 'cores) 0)
#:use-substitutes? (assoc-ref opts 'substitutes?)
#:verbosity (assoc-ref opts 'verbosity))
(if (assoc-ref opts 'derivations-only?)
(begin
(format #t "~{~a~%~}" drv)
(for-each (cut register-root <> <>)
(map list drv) roots))
(or (assoc-ref opts 'dry-run?)
(and (build-derivations (%store) drv)
(for-each (lambda (d)
(let ((drv (call-with-input-file d
read-derivation)))
(format #t "~{~a~%~}"
(map (match-lambda
((out-name . out)
(derivation-path->output-path
d out-name)))
(derivation-outputs drv)))))
drv)
(for-each (cut register-root <> <>)
(map (lambda (drv)
(map cdr
(derivation-path->output-paths drv)))
drv)
roots)))))))))
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