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+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 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 (gnu system)
+ #:use-module (guix store)
+ #:use-module (guix monads)
+ #:use-module (guix records)
+ #:use-module (guix packages)
+ #:use-module (guix derivations)
+ #:use-module (gnu packages linux-initrd)
+ #:use-module (gnu packages base)
+ #:use-module (gnu packages bash)
+ #:use-module (gnu packages system)
+ #:use-module (gnu packages package-management)
+ #:use-module (gnu system dmd)
+ #:use-module (gnu system grub)
+ #:use-module (gnu system shadow)
+ #:use-module (gnu system linux)
+ #:use-module (ice-9 match)
+ #:use-module (srfi srfi-1)
+ #:use-module (srfi srfi-26)
+ #:export (operating-system
+ operating-system?
+ operating-system-services
+ operating-system-packages
+
+ operating-system-derivation))
+
+;;; Commentary:
+;;;
+;;; This module supports whole-system configuration.
+;;;
+;;; Code:
+
+;; System-wide configuration.
+;; TODO: Add per-field docstrings/stexi.
+(define-record-type* <operating-system> operating-system
+ make-operating-system
+ operating-system?
+ (kernel operating-system-kernel ; package
+ (default linux-libre))
+ (bootloader operating-system-bootloader ; package
+ (default grub))
+ (bootloader-entries operating-system-bootloader-entries ; list
+ (default '()))
+ (initrd operating-system-initrd
+ (default gnu-system-initrd))
+
+ (host-name operating-system-host-name) ; string
+
+ (file-systems operating-system-file-systems ; list of fs
+ (default '()))
+
+ (users operating-system-users ; list of user accounts
+ (default '()))
+ (groups operating-system-groups ; list of user groups
+ (default (list (user-group
+ (name "root")
+ (id 0))
+ (user-group
+ (name "users")
+ (id 100)
+ (members '("guest"))))))
+
+ (packages operating-system-packages ; list of (PACKAGE OUTPUT...)
+ (default `(("coreutils" ,coreutils)
+ ("grep" ,grep)
+ ("guile" ,guile)
+ ("bash" ,bash)
+ ("dmd" ,(@ (gnu packages dmd) dmd))
+ ("guix" ,guix))))
+
+ (timezone operating-system-timezone) ; string
+ (locale operating-system-locale) ; string
+
+ (services operating-system-services ; list of monadic services
+ (default
+ (let ((motd (text-file "motd" "
+This is the GNU operating system, welcome!\n\n")))
+ (list (mingetty-service "tty1" #:motd motd)
+ (mingetty-service "tty2" #:motd motd)
+ (mingetty-service "tty3" #:motd motd)
+ (mingetty-service "tty4" #:motd motd)
+ (mingetty-service "tty5" #:motd motd)
+ (mingetty-service "tty6" #:motd motd)
+ (syslog-service)
+ (guix-service)
+ (nscd-service)
+
+ ;; QEMU networking settings.
+ (static-networking-service "eth0" "10.0.2.10"
+ #:name-servers '("10.0.2.3")
+ #:gateway "10.0.2.2"))))))
+
+
+
+;;;
+;;; Derivation.
+;;;
+
+(define* (union inputs
+ #:key (guile (%guile-for-build)) (system (%current-system))
+ (name "union"))
+ "Return a derivation that builds the union of INPUTS. INPUTS is a list of
+input tuples."
+ (define builder
+ '(begin
+ (use-modules (guix build union))
+
+ (setvbuf (current-output-port) _IOLBF)
+ (setvbuf (current-error-port) _IOLBF)
+
+ (let ((output (assoc-ref %outputs "out"))
+ (inputs (map cdr %build-inputs)))
+ (format #t "building union `~a' with ~a packages...~%"
+ output (length inputs))
+ (union-build output inputs))))
+
+ (mlet %store-monad
+ ((inputs (sequence %store-monad
+ (map (match-lambda
+ ((name (? package? p))
+ (mlet %store-monad
+ ((drv (package->derivation p system)))
+ (return `(,name ,drv))))
+ ((name (? package? p) output)
+ (mlet %store-monad
+ ((drv (package->derivation p system)))
+ (return `(,name ,drv ,output))))
+ (x
+ (return x)))
+ inputs))))
+ (derivation-expression name builder
+ #:system system
+ #:inputs inputs
+ #:modules '((guix build union))
+ #:guile-for-build guile)))
+
+(define* (file-union files
+ #:key (inputs '()) (name "file-union"))
+ "Return a derivation that builds a directory containing all of FILES. Each
+item in FILES must be a list where the first element is the file name to use
+in the new directory, and the second element is the target file.
+
+The subset of FILES corresponding to plain store files is automatically added
+as an inputs; additional inputs, such as derivations, are taken from INPUTS."
+ (mlet %store-monad ((inputs (lower-inputs inputs)))
+ (let* ((outputs (append-map (match-lambda
+ ((_ (? derivation? drv))
+ (list (derivation->output-path drv)))
+ ((_ (? derivation? drv) sub-drv ...)
+ (map (cut derivation->output-path drv <>)
+ sub-drv))
+ (_ '()))
+ inputs))
+ (inputs (append inputs
+ (filter (match-lambda
+ ((_ file)
+ ;; Elements of FILES that are store
+ ;; files and that do not correspond to
+ ;; the output of INPUTS are considered
+ ;; inputs (still here?).
+ (and (direct-store-path? file)
+ (not (member file outputs)))))
+ files))))
+ (derivation-expression name
+ `(let ((out (assoc-ref %outputs "out")))
+ (mkdir out)
+ (chdir out)
+ ,@(map (match-lambda
+ ((name target)
+ `(symlink ,target ,name)))
+ files))
+
+ #:inputs inputs))))
+
+(define (links inputs)
+ "Return a directory with symbolic links to all of INPUTS. This is
+essentially useful when one wants to keep references to all of INPUTS, be they
+directories or regular files."
+ (define builder
+ '(begin
+ (use-modules (srfi srfi-1))
+
+ (let ((out (assoc-ref %outputs "out")))
+ (mkdir out)
+ (chdir out)
+ (fold (lambda (file number)
+ (symlink file (number->string number))
+ (+ 1 number))
+ 0
+ (map cdr %build-inputs))
+ #t)))
+
+ (mlet %store-monad ((inputs (lower-inputs inputs)))
+ (derivation-expression "links" builder
+ #:inputs inputs)))
+
+(define* (etc-directory #:key
+ (accounts '())
+ (groups '())
+ (pam-services '())
+ (profile "/var/run/current-system/profile"))
+ "Return a derivation that builds the static part of the /etc directory."
+ (mlet* %store-monad
+ ((services (package-file net-base "etc/services"))
+ (protocols (package-file net-base "etc/protocols"))
+ (rpc (package-file net-base "etc/rpc"))
+ (passwd (passwd-file accounts))
+ (shadow (passwd-file accounts #:shadow? #t))
+ (group (group-file groups))
+ (pam.d (pam-services->directory pam-services))
+ (login.defs (text-file "login.defs" "# Empty for now.\n"))
+ (issue (text-file "issue" "
+This is an alpha preview of the GNU system. Welcome.
+
+This image features the GNU Guix package manager, which was used to
+build it (http://www.gnu.org/software/guix/). The init system is
+GNU dmd (http://www.gnu.org/software/dmd/).
+
+You can log in as 'guest' or 'root' with no password.
+"))
+
+ ;; TODO: Generate bashrc from packages' search-paths.
+ (bashrc (text-file "bashrc" (string-append "
+export PS1='\\u@\\h\\$ '
+export PATH=$HOME/.guix-profile/bin:" profile "/bin:" profile "/sbin
+export CPATH=$HOME/.guix-profile/include:" profile "/include
+export LIBRARY_PATH=$HOME/.guix-profile/lib:" profile "/lib
+alias ls='ls -p --color'
+alias ll='ls -l'
+")))
+
+ (files -> `(("services" ,services)
+ ("protocols" ,protocols)
+ ("rpc" ,rpc)
+ ("pam.d" ,(derivation->output-path pam.d))
+ ("login.defs" ,login.defs)
+ ("issue" ,issue)
+ ("profile" ,bashrc)
+ ("passwd" ,passwd)
+ ("shadow" ,shadow)
+ ("group" ,group))))
+ (file-union files
+ #:inputs `(("net" ,net-base)
+ ("pam.d" ,pam.d))
+ #:name "etc")))
+
+(define (operating-system-derivation os)
+ "Return a derivation that builds OS."
+ (mlet* %store-monad
+ ((services (sequence %store-monad
+ (cons (host-name-service
+ (operating-system-host-name os))
+ (operating-system-services os))))
+ (pam-services ->
+ ;; Services known to PAM.
+ (delete-duplicates
+ (cons %pam-other-services
+ (append-map service-pam-services services))))
+
+ (bash-file (package-file bash "bin/bash"))
+ (dmd-file (package-file (@ (gnu packages system) dmd) "bin/dmd"))
+ (accounts -> (cons (user-account
+ (name "root")
+ (password "")
+ (uid 0) (gid 0)
+ (comment "System administrator")
+ (home-directory "/")
+ (shell bash-file))
+ (append (operating-system-users os)
+ (append-map service-user-accounts
+ services))))
+ (groups -> (append (operating-system-groups os)
+ (append-map service-user-groups services)))
+ (packages -> (operating-system-packages os))
+
+ ;; TODO: Replace with a real profile with a manifest.
+ (profile-drv (union packages
+ #:name "default-profile"))
+ (profile -> (derivation->output-path profile-drv))
+ (etc-drv (etc-directory #:accounts accounts #:groups groups
+ #:pam-services pam-services
+ #:profile profile))
+ (etc -> (derivation->output-path etc-drv))
+ (dmd-conf (dmd-configuration-file services etc))
+
+
+ (boot (text-file "boot"
+ (object->string
+ `(execl ,dmd-file "dmd"
+ "--config" ,dmd-conf))))
+ (kernel -> (operating-system-kernel os))
+ (kernel-dir (package-file kernel))
+ (initrd -> (operating-system-initrd os))
+ (initrd-file (package-file initrd))
+ (entries -> (list (menu-entry
+ (label (string-append
+ "GNU system with "
+ (package-full-name kernel)
+ " (technology preview)"))
+ (linux kernel)
+ (linux-arguments `("--root=/dev/vda1"
+ ,(string-append "--load=" boot)))
+ (initrd initrd))))
+ (grub.cfg (grub-configuration-file entries))
+ (extras (links (delete-duplicates
+ (append-map service-inputs services)))))
+ (file-union `(("boot" ,boot)
+ ("kernel" ,kernel-dir)
+ ("initrd" ,initrd-file)
+ ("dmd.conf" ,dmd-conf)
+ ("bash" ,bash-file) ; XXX: should be a <user-account> input?
+ ("profile" ,profile)
+ ("grub.cfg" ,grub.cfg)
+ ("etc" ,etc)
+ ("service-inputs" ,(derivation->output-path extras)))
+ #:inputs `(("kernel" ,kernel)
+ ("initrd" ,initrd)
+ ("bash" ,bash)
+ ("profile" ,profile-drv)
+ ("etc" ,etc-drv)
+ ("service-inputs" ,extras))
+ #:name "system")))
+
+;;; system.scm ends here
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