;;; GNU Guix --- Functional package management for GNU ;;; Copyright © 2014 Ludovic Courtès ;;; ;;; 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 . (define-module (guix scripts system) #:use-module (guix ui) #:use-module (guix store) #:use-module (guix gexp) #:use-module (guix derivations) #:use-module (guix packages) #:use-module (guix utils) #:use-module (guix monads) #:use-module (guix scripts build) #:use-module (guix build utils) #:use-module (guix build install) #:use-module (gnu system) #:use-module (gnu system vm) #:use-module (srfi srfi-1) #:use-module (srfi srfi-26) #:use-module (srfi srfi-37) #:use-module (ice-9 match) #:export (guix-system read-operating-system)) (define %user-module ;; Module in which the machine description file is loaded. (let ((module (make-fresh-user-module))) (for-each (lambda (iface) (module-use! module (resolve-interface iface))) '((gnu system) (gnu services) (gnu system shadow))) module)) (define (read-operating-system file) "Read the operating-system declaration from FILE and return it." ;; TODO: Factorize. (catch #t (lambda () ;; Avoid ABI incompatibility with the record. (set! %fresh-auto-compile #t) (save-module-excursion (lambda () (set-current-module %user-module) (primitive-load file)))) (lambda args (match args (('system-error . _) (let ((err (system-error-errno args))) (leave (_ "failed to open operating system file '~a': ~a~%") file (strerror err)))) (_ (leave (_ "failed to load machine file '~a': ~s~%") file args)))))) (define* (install store os-dir target #:key (log-port (current-output-port))) "Copy OS-DIR and its dependencies to directory TARGET. TARGET must be an absolute directory name since that's what 'guix-register' expects." (define to-copy (let ((lst (delete-duplicates (cons os-dir (references store os-dir)) string=?))) (topologically-sorted store lst))) ;; Copy items to the new store. (for-each (lambda (item) (let ((dest (string-append target item)) (refs (references store item))) (format log-port "copying '~a'...~%" item) (copy-recursively item dest #:log (%make-void-port "w")) ;; Register ITEM; as a side-effect, it resets timestamps, etc. (unless (register-path item #:prefix target #:references refs) (leave (_ "failed to register '~a' under '~a'~%") item target)))) to-copy) ;; Create a bunch of additional files. (format log-port "populating '~a'...~%" target) (populate-root-file-system target) ;; TODO: Install GRUB. ) ;;; ;;; Options. ;;; (define (show-help) (display (_ "Usage: guix system [OPTION] ACTION FILE Build the operating system declared in FILE according to ACTION.\n")) (newline) (display (_ "The valid values for ACTION are:\n")) (display (_ "\ - 'build', build the operating system without installing anything\n")) (display (_ "\ - 'vm', build a virtual machine image that shares the host's store\n")) (display (_ "\ - 'vm-image', build a freestanding virtual machine image\n")) (display (_ "\ - 'init', initialize a root file system to run GNU.\n")) (show-build-options-help) (display (_ " --image-size=SIZE for 'vm-image', produce an image of SIZE")) (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. (cons* (option '(#\h "help") #f #f (lambda args (show-help) (exit 0))) (option '(#\V "version") #f #f (lambda args (show-version-and-exit "guix system"))) (option '("image-size") #t #f (lambda (opt name arg result) (alist-cons 'image-size (size->number arg) result))) (option '(#\n "dry-run") #f #f (lambda (opt name arg result) (alist-cons 'dry-run? #t result))) %standard-build-options)) (define %default-options ;; Alist of default option values. `((system . ,(%current-system)) (substitutes? . #t) (build-hook? . #t) (max-silent-time . 3600) (verbosity . 0) (image-size . ,(* 900 (expt 2 20))))) ;;; ;;; Entry point. ;;; (define (guix-system . 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) (if (assoc-ref result 'action) (alist-cons 'argument arg result) (let ((action (string->symbol arg))) (case action ((build vm vm-image init) (alist-cons 'action action result)) (else (leave (_ "~a: unknown action~%") action)))))) %default-options)) (define (match-pair car) ;; Return a procedure that matches a pair with CAR. (match-lambda ((head . tail) (and (eq? car head) tail)) (_ #f))) (define (option-arguments opts) ;; Extract the plain arguments from OPTS. (let* ((args (reverse (filter-map (match-pair 'argument) opts))) (count (length args)) (action (assoc-ref opts 'action))) (define (fail) (leave (_ "wrong number of arguments for action '~a'~%") action)) (case action ((build vm vm-image) (unless (= count 1) (fail))) ((init) (unless (= count 2) (fail)))) args)) (with-error-handling (let* ((opts (parse-options)) (args (option-arguments opts)) (file (first args)) (action (assoc-ref opts 'action)) (os (if file (read-operating-system file) (leave (_ "no configuration file specified~%")))) (mdrv (case action ((build init) (operating-system-derivation os)) ((vm-image) (let ((size (assoc-ref opts 'image-size))) (system-qemu-image os #:disk-image-size size))) ((vm) (system-qemu-image/shared-store-script os)))) (store (open-connection)) (dry? (assoc-ref opts 'dry-run?)) (drv (run-with-store store mdrv))) (set-build-options-from-command-line store opts) (show-what-to-build store (list drv) #:dry-run? dry? #:use-substitutes? (assoc-ref opts 'substitutes?)) (unless dry? (build-derivations store (list drv)) (display (derivation->output-path drv)) (newline) (when (eq? action 'init) (let ((target (second args))) (format #t (_ "initializing operating system under '~a'...~%") target) (install store (derivation->output-path drv) (canonicalize-path target))))))))