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-*- mode: org; coding: utf-8; -*-

#+TITLE: Tentative GNU Guix Road Map

Copyright © 2012, 2013, 2014, 2015 Ludovic Courtès <ludo@gnu.org>

  Copying and distribution of this file, with or without modification,
  are permitted in any medium without royalty provided the copyright
  notice and this notice are preserved.

The goals of the GNU Guix project are two-fold:

  - to build a purely functional package manager, based on Nix and
    Guile;

  - to use it to build a practical 100% free software distribution of
    GNU/Linux and possibly other GNU variants, with a focus on the
    promotion and tight integration of GNU components–the GNU system.

Since its inception, the project has gone a long way towards that goal.  Below
is a list of items we want for version "1.0" of the Guix System Distribution.
There will be a few 0.x releases by then to give the new features more
exposure and testing.

You're welcome to discuss this road map on guix-devel@gnu.org or #guix on
the Libera Chat IRC network!

* Features scheduled for 1.0

  - larger & more robust build farm
    + we need a powerful, dedicated front-end
    + armhf-linux build machine
    + leave Hydra in favor of 'guix publish' + custom code?
  - more OS features
    + LVM support
    + encrypted root
    + configurable name service switch
    + whole-system unit tests, using VMs
  - more service definitions
    + mcron, postfix(?), wicd(?), etc.
  - better 'guix system'
    + 'reconfigure' should be able to restart non-essential services
    + support for '--list-generations' and '--delete-generations'
  - better 'guix pull'
    + using Git to fetch the source instead of re-downloading everything
    + build more quickly
    + install new .mo files and new manual
    + authentication of the Guix source: use signed commits?
  - simplified, purely declarative service list in 'operating-system'
    + it should be possible to inspect the service instance declarations and
      settings
  - GUIs
    + integrate guix-web?
    + guile-ncurses installer?
  - 'guix publish'?

* Features for later

  - complete GNU/Hurd port
  - use content-based addressing when downloading substitutes to reduce
    bandwidth requirements
    + design nar v2 format where file contents are replaced by their hashes
    + leverage /gnu/store/.links
  - binary origin tracking
    + keep signatures in sqlite.db
    + preserve signatures upon import/export
  - peer-to-peer distribution of updates (GNUnet?)
  - more deterministic builds
    + identify & fix sources of non-determinism in builds
    + strengthen guix-daemon containers to further increase reproducibility
    + trusting-trust: bootstrap with different tool chains
    + fixed-point: re-bootstrap until fixed point is reached
    + distributed validation: compare contents of store items with others
      * resist a hydra.gnu.org compromise
  - reproducible containers: mix of 'guix environment' and 'guix system vm'
  - execute code with least privilege
    + build containers like guix-daemon does
    + provide a Plash-like interface in Bash
  - daemon rewritten in Guile
  - more shepherd integration
    + monitor network interfaces and start/stop events based on that
    + include a DHCP client written in Scheme
generated by cgit
rrently PulseAudio Sound Server)\" } } ctl.!default { type pulse fallback \"sysdefault\" }\n\n") '()) ,extra-options))))) (define (alsa-etc-service config) (list `("asound.conf" ,(alsa-config-file config)))) (define alsa-service-type (service-type (name 'alsa) (extensions (list (service-extension etc-service-type alsa-etc-service))) (default-value (alsa-configuration)) (description "Configure low-level Linux sound support, ALSA."))) ;;; ;;; PulseAudio ;;; (define-record-type* <pulseaudio-configuration> pulseaudio-configuration make-pulseaudio-configuration pulseaudio-configuration? (client-conf pulseaudio-configuration-client-conf (default '())) (daemon-conf pulseaudio-configuration-daemon-conf ;; Flat volumes may cause unpleasant experiences to users ;; when applications inadvertently max out the system volume ;; (see e.g. <https://bugs.gnu.org/38172>). (default '((flat-volumes . no)))) (script-file pulseaudio-configuration-script-file (default (file-append pulseaudio "/etc/pulse/default.pa"))) (extra-script-files pulseaudio-configuration-extra-script-files (default '())) (system-script-file pulseaudio-configuration-system-script-file (default (file-append pulseaudio "/etc/pulse/system.pa")))) (define (pulseaudio-conf-entry arg) (match arg ((key . value) (format #f "~a = ~s~%" key value)) ((? string? _) (string-append arg "\n")))) (define pulseaudio-environment (match-lambda (($ <pulseaudio-configuration> client-conf daemon-conf default-script-file) ;; These config files kept at a fixed location, so that the following ;; environment values are stable and do not require the user to reboot to ;; effect their PulseAudio configuration changes. '(("PULSE_CONFIG" . "/etc/pulse/daemon.conf") ("PULSE_CLIENTCONFIG" . "/etc/pulse/client.conf"))))) (define (extra-script-files->file-union extra-script-files) "Return a G-exp obtained by processing EXTRA-SCRIPT-FILES with FILE-UNION." (define (file-like->name file) (match file ((? local-file?) (local-file-name file)) ((? plain-file?) (plain-file-name file)) ((? computed-file?) (computed-file-name file)) (_ (leave (G_ "~a is not a local-file, plain-file or \ computed-file object~%") file)))) (define (assert-pulseaudio-script-file-name name) (unless (string-suffix? ".pa" name) (leave (G_ "`~a' lacks the required `.pa' file name extension~%") name)) name) (let ((labels (map (compose assert-pulseaudio-script-file-name file-like->name) extra-script-files))) (file-union "default.pa.d" (zip labels extra-script-files)))) (define (append-include-directive script-file) "Append an include directive to source scripts under /etc/pulse/default.pa.d." (computed-file "default.pa" #~(begin (use-modules (ice-9 textual-ports)) (define script-text (call-with-input-file #$script-file get-string-all)) (call-with-output-file #$output (lambda (port) (format port (string-append script-text " ### Added by Guix to include scripts specified in extra-script-files. .nofail .include /etc/pulse/default.pa.d~%"))))))) (define pulseaudio-etc (match-lambda (($ <pulseaudio-configuration> client-conf daemon-conf default-script-file extra-script-files system-script-file) `(("pulse" ,(file-union "pulse" `(("default.pa" ,(if (null? extra-script-files) default-script-file (append-include-directive default-script-file))) ("system.pa" ,system-script-file) ,@(if (null? extra-script-files) '() `(("default.pa.d" ,(extra-script-files->file-union extra-script-files)))) ("daemon.conf" ,(apply mixed-text-file "daemon.conf" "default-script-file = /etc/pulse/default.pa\n" (map pulseaudio-conf-entry daemon-conf))) ("client.conf" ,(apply mixed-text-file "client.conf" (map pulseaudio-conf-entry client-conf)))))))))) (define pulseaudio-service-type (service-type (name 'pulseaudio) (extensions (list (service-extension session-environment-service-type pulseaudio-environment) (service-extension etc-service-type pulseaudio-etc) (service-extension udev-service-type (const (list pulseaudio))))) (default-value (pulseaudio-configuration)) (description "Configure PulseAudio sound support."))) ;;; ;;; LADSPA ;;; (define-record-type* <ladspa-configuration> ladspa-configuration make-ladspa-configuration ladspa-configuration? (plugins ladspa-configuration-plugins (default '()))) (define (ladspa-environment config) ;; Define this variable in the global environment such that ;; pulseaudio swh-plugins (and similar LADSPA plugins) work. `(("LADSPA_PATH" . (string-join ',(map (lambda (package) (file-append package "/lib/ladspa")) (ladspa-configuration-plugins config)) ":")))) (define ladspa-service-type (service-type (name 'ladspa) (extensions (list (service-extension session-environment-service-type ladspa-environment))) (default-value (ladspa-configuration)) (description "Configure LADSPA plugins."))) ;;; sound.scm ends here
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