From 0adfe95a3eee335847c3127edde3de550e692440 Mon Sep 17 00:00:00 2001 From: Ludovic Courtès Date: Thu, 17 Sep 2015 23:44:26 +0200 Subject: services: Introduce extensible services. This patch rewrites GuixSD services to make them extensible. * gnu-system.am (GNU_SYSTEM_MODULES): Add gnu/services/dbus.scm. * gnu/services.scm (): Replace with new record type. (, ): New record types. (write-service-type, compute-boot-script, second-argument): New procedures. (%boot-service, boot-service-type): New variables. (file-union, directory-union, modprobe-wrapper, activation-service->script, activation-script, gexps->activation-gexp): New procedures. (activation-service-type, %activation-service): New variables. (etc-directory, files->etc-directory, etc-service): New procedures. (etc-service-type, setuid-program-service, firmware-service-type): New variables. (firmware->activation-gexp): New procedure. (&service-error, &missing-target-service-error, &ambiguous-target-service-error): New condition types. (service-back-edges, fold-services): New procedures. * gnu/services/avahi.scm (): New record type. (configuration-file): Replace keyword parameters with a single 'config' parameter. (%avahi-accounts, %avahi-activation, avahi-service-type): New variables. (avahi-dmd-service): New procedure. (avahi-service): Rewrite using 'service' and 'avahi-configuration'. * gnu/services/base.scm (%root-file-system-dmd-service, root-file-system-service-type): New variables. (root-file-system-service): Use them. (file-system->dmd-service-name): New procedure. (file-system-service-type): New variable. (file-system-service): Use it. Replace keyword parameters with a single 'file-system' object. (user-unmount-service-type): New variable. (user-unmount-service): Use it. (user-processes-service-type): New variable. (user-processes-service): Use it. (host-name-service-type): New variable. (host-name-service): Use it. (console-keymap-service-type): New variable. (console-keymap-service): Use it. (console-font-service-type): New variable. (console-font-service): Use it. (mingetty-pam-service, mingetty-dmd-service): New procedures. (mingetty-service-type): New variable. (mingetty-service): Use it. (nscd-dmd-service): New procedure. (nscd-activation, nscd-service-type): New variables. (nscd-service): Use the latter. (syslog-service-type): New variable. (syslog-service): Use it. (): New record type. (%default-guix-configuration): New variable. (guix-dmd-service, guix-accounts, guix-activation): New procedures. (guix-service-type): New variable. (guix-service): Replace list of keyword parameters with a single 'config' parameter. Rewrite using 'service'. (): New record type. (udev-dmd-service): New procedure. (udev-service-type): New variable. (udev-service): Use it. (device-mapping-service-type): New variable. (device-mapping-service): Use it. (swap-service-type): New variable. (swap-service): Use it. * gnu/services/databases.scm (): New record type. (%postgresql-accounts, postgresql-activation): New variables. (postgresql-dmd-service): New procedure. (postgresql-service): Rewrite using 'service' and 'postgresql-configuration'. * gnu/services/dbus.scm: New file. * gnu/services/desktop.scm (dbus-configuration-directory, dbus-service): Remove. (wrapped-dbus-service): New procedure. (): New record type. (upower-configuration-file): Replace keyword parameters with single parameter. (%upower-accounts, %upower-activation): New variables. (upower-dbus-service, upower-dmd-service): New procedures. (upower-service-type): New variable. (upower-service): Rewrite using 'service' and 'upower-configuration'. (%colord-activation, %colord-accounts): New variables. (colord-dmd-service): New procedure. (colord-service-type): New variable. (colord-service): Rewrite using 'service'. (): New record type. (geoclue-configuration-file): Replace keyword parameters with a single 'config' parameter. (geoclue-dbus-service, geoclue-dmd-service): New procedures. (%geoclue-accounts, geoclue-service-type): New variables. (geoclue-service): Rewrite using 'service' and 'geoclue-configuration'. (%polkit-accounts, %polkit-pam-services, polkit-service-type): New variables. (polkit-dmd-service): New procedure. (polkit-service): Rewrite using 'service'. ()[elogind]: New field. (elogind-dmd-service): New procedure. (elogind-service-type): New variable. (elogind-service): Rewrite using 'service'. (%desktop-services): Remove argument to 'dbus-service'. Remove 'map' over %BASE-SERVICES. * gnu/services/dmd.scm (dmd-boot-gexp): New procedure. (dmd-root-service-type, %dmd-root-service): New variables. (dmd-service-type): New macro. (): New record type. * gnu/services/lirc.scm (): New record type. (%lirc-activation): New variable. (lirc-dmd-service): New procedure. (lirc-service-type): New variable. (lirc-service): Rewrite using 'service' and 'lirc-configuration'. * gnu/services/networking.scm (): New record type. (static-networking-service-type): New variable. (static-networking-service): Rewrite using 'service' and 'static-networking'. (dhcp-client-service-type): New variable. (dhcp-client-service): Rewrite using 'service'. (): New record type. (ntp-dmd-service): New procedure. (ntp-service-type): New variable. (ntp-service): New procedure. (%tor-accounts, tor-service-type): New variable. (tor-dmd-service): New procedure. (tor-service): Rewrite using 'service'. (): New record type. (bitlbee-dmd-service): New procedure. (%bitlbee-accounts, %bitlbee-activation, bitlbee-service-type): New variables. (bitlbee-service): Rewrite using 'service'. (%wicd-activation): New variable. (wicd-dmd-service): New procedure. (wicd-service-type): New variable. (wicd-service): Rewrite using 'service'. * gnu/services/ssh.scm (): New record type. (activation): Rename to... (lsh-initialization): ... this. (lsh-activation, lsh-dmd-service, lsh-pam-services): New procedures. (lsh-service-type): New variable. (lsh-service): Rewrite using 'service' and 'lsh-configuration'. * gnu/services/web.scm (): New record type. (%nginx-accounts): New variable. (nginx-activation, nginx-dmd-service): New procedures. (nginx-service-type): New variable. (nginx-service): Rewrite using 'service' and 'nginx-configuration'. * gnu/services/xorg.scm (): New record type. (slim-pam-service, slim-dmd-service): New procedures. (slim-service-type): New variable. (slim-service): Rewrite using 'service' and 'slim-configuration'. * gnu/system.scm (file-union): Remove. (other-file-system-services): Adjust to new 'file-system-service' signature. (essential-services): Add #:container? parameter. Add %DMD-ROOT-SERVICE, %ACTIVATION-SERVICE, and calls to 'pam-root-service', 'account-service', 'operating-system-etc-service', and a SETUID-PROGRAM-SERVICE instance. (operating-system-services): Pass #:container? to 'essential-services. (etc-directory): Remove. (operating-system-etc-service): New procedure. Rewrite as a call to 'etc-service'. (operating-system-accounts): Change to not return accounts required by services. (operating-system-etc-directory): Rewrite as a call to 'fold-services' and 'etc-directory'. (user-group->gexp, user-account->gexp, modprobe-wrapper): Remove. (operating-system-activation-script): Rewrite as a call to 'fold-services' and 'activation-service->script'. (operating-system-boot-script): Likewise. (operating-system-derivation): Add call to 'lower-object'. (emacs-site-file, emacs-site-directory, shells-file): Change to use 'computed-file' and 'scheme-file' instead of the monadic procedures. * gnu/system/install.scm (cow-store-service-type): New variable. (cow-store-service): Rewrite using 'service'. (/etc/configuration-files): New procedure. (configuration-template-service-type, %configuration-template-service): New variables. (configuration-template-service): Remove. (installation-services): Adjust accordingly. Adjust argument to 'guix-service'. * gnu/system/linux.scm (/etc-entry, pam-root-service): New procedures. (pam-root-service-type): New variable. * gnu/system/shadow.scm (user-group->gexp, user-account->gexp, account-activation, etc-skel, account-service): New procedures. (account-service-type): New variable. * tests/services.scm: New file. * doc/guix.texi (Base Services, Desktop Services): Adjust accordingly. (Defining Services): Rewrite. * doc/images/service-graph.dot: New file. * doc.am (DOT_FILES): Add it. * po/guix/POTFILES.in: Add gnu/services.scm. --- gnu/services/dmd.scm | 78 +++++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 77 insertions(+), 1 deletion(-) (limited to 'gnu/services/dmd.scm') diff --git a/gnu/services/dmd.scm b/gnu/services/dmd.scm index 618df91c5e..6020ffc8eb 100644 --- a/gnu/services/dmd.scm +++ b/gnu/services/dmd.scm @@ -22,13 +22,27 @@ #:use-module (guix gexp) #:use-module (guix store) #:use-module (guix monads) + #:use-module (guix records) #:use-module (guix derivations) ;imported-modules, etc. #:use-module (gnu services) + #:use-module (gnu packages admin) #:use-module (ice-9 match) #:use-module (srfi srfi-1) #:use-module (srfi srfi-34) #:use-module (srfi srfi-35) - #:export (dmd-configuration-file)) + #:export (dmd-root-service-type + %dmd-root-service + dmd-service-type + + dmd-service + dmd-service? + dmd-service-documentation + dmd-service-provision + dmd-service-requirement + dmd-service-respawn? + dmd-service-start + dmd-service-stop + dmd-service-auto-start?)) ;;; Commentary: ;;; @@ -36,6 +50,68 @@ ;;; ;;; Code: + +(define (dmd-boot-gexp services) + (mlet %store-monad ((dmd-conf (dmd-configuration-file services))) + (return #~(begin + ;; Keep track of the booted system. + (false-if-exception (delete-file "/run/booted-system")) + (symlink (readlink "/run/current-system") + "/run/booted-system") + + ;; Close any remaining open file descriptors to be on the safe + ;; side. This must be the very last thing we do, because + ;; Guile has internal FDs such as 'sleep_pipe' that need to be + ;; alive. + (let loop ((fd 3)) + (when (< fd 1024) + (false-if-exception (close-fdes fd)) + (loop (+ 1 fd)))) + + ;; Start dmd. + (execl (string-append #$dmd "/bin/dmd") + "dmd" "--config" #$dmd-conf))))) + +(define dmd-root-service-type + (service-type + (name 'dmd-root) + ;; Extending the root dmd service (aka. PID 1) happens by concatenating the + ;; list of services provided by the extensions. + (compose concatenate) + (extend append) + (extensions (list (service-extension boot-service-type dmd-boot-gexp))))) + +(define %dmd-root-service + ;; The root dmd service, aka. PID 1. Its parameter is a list of + ;; objects. + (service dmd-root-service-type '())) + +(define-syntax-rule (dmd-service-type proc) + "Return a denoting a simple dmd service--i.e., the type for a +service that extends DMD-ROOT-SERVICE-TYPE and nothing else." + (service-type + (name 'some-dmd-service) + (extensions + (list (service-extension dmd-root-service-type + (compose list proc)))))) + +(define-record-type* + dmd-service make-dmd-service + dmd-service? + (documentation service-documentation ; string + (default "[No documentation.]")) + (provision service-provision) ; list of symbols + (requirement service-requirement ; list of symbols + (default '())) + (respawn? service-respawn? ; Boolean + (default #t)) + (start service-start) ; g-expression (procedure) + (stop service-stop ; g-expression (procedure) + (default #~(const #f))) + (auto-start? service-auto-start? ; Boolean + (default #t))) + + (define (assert-no-duplicates services) "Raise an error if SERVICES provide the same dmd service more than once. -- cgit 1.4.1