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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))))))
+
+ (install-locale)
+ (textdomain "guix")
+ (setvbuf (current-output-port) _IOLBF)
+ (setvbuf (current-error-port) _IOLBF)
+
+ (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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