From b5f4e686359d8842b329e6b161ef89fa6c04ebc3 Mon Sep 17 00:00:00 2001 From: Ludovic Courtès Date: Mon, 28 Apr 2014 23:07:08 +0200 Subject: services: Rewrite using gexps. * gnu/services.scm ()[inputs]: Remove. * gnu/system.scm (links): Remove. (etc-directory): Add PASSWD and SHADOW to #:inputs. (operating-system-boot-script): Pass ETC to 'dmd-configuration-file'. (operating-system-derivation): Remove EXTRAS from the union. * gnu/system/linux.scm (pam-service->configuration): Rewrite in terms of 'gexp->derivation'. Compute the contents on the build side. Expect 'arguments' to contain a list of gexps. (pam-services->directory): Rewrite in terms of 'gexp->derivation'. (unix-pam-service): Change 'arguments' to a list of one gexp. * gnu/system/shadow.scm ()[inputs]: Remove. [shell]: Change default value to a gexp. (passwd-file): Rewrite in terms of 'gexp->derivation'. Compute contents on the build side. * gnu/services/base.scm (host-name-service, mingetty-service, nscd-service, syslog-service, guix-service): Change 'start' and 'stop' to gexps; remove 'inputs' field. (guix-build-accounts): Change 'shell' field to a gexp. * gnu/services/networking.scm (static-networking-service): Change 'start' and 'stop' to gexps; remove 'inputs' field. * gnu/services/xorg.scm (slim-service): Likewise. * gnu/services/dmd.scm (dmd-configuration-file): Expect ETC to be a derivation. Change 'config' to a gexp. Use 'gexp->file' instead of 'text-file'. * doc/guix.texi (Defining Services): Update nscd example with gexps, and without 'inputs'. Add xref to "G-Expressions". --- gnu/services/base.scm | 60 +++++++++++++++++------------------ gnu/services/dmd.scm | 77 +++++++++++++++++++++++---------------------- gnu/services/networking.scm | 58 +++++++++++++++++----------------- gnu/services/xorg.scm | 19 +++++------ 4 files changed, 106 insertions(+), 108 deletions(-) (limited to 'gnu/services') diff --git a/gnu/services/base.scm b/gnu/services/base.scm index 3145a657f8..9561995243 100644 --- a/gnu/services/base.scm +++ b/gnu/services/base.scm @@ -24,6 +24,7 @@ #:use-module ((gnu packages base) #:select (glibc-final)) #:use-module (gnu packages package-management) + #:use-module (guix gexp) #:use-module (guix monads) #:use-module (srfi srfi-1) #:use-module (srfi srfi-26) @@ -48,8 +49,8 @@ (return (service (documentation "Initialize the machine's host name.") (provision '(host-name)) - (start `(lambda _ - (sethostname ,name))) + (start #~(lambda _ + (sethostname #$name))) (respawn? #f))))) (define* (mingetty-service tty @@ -57,8 +58,7 @@ (motd (text-file "motd" "Welcome.\n")) (allow-empty-passwords? #t)) "Return a service to run mingetty on TTY." - (mlet %store-monad ((mingetty-bin (package-file mingetty "sbin/mingetty")) - (motd motd)) + (mlet %store-monad ((motd motd)) (return (service (documentation (string-append "Run mingetty on " tty ".")) @@ -68,10 +68,10 @@ ;; service to be done. (requirement '(host-name)) - (start `(make-forkexec-constructor ,mingetty-bin "--noclear" ,tty)) - (stop `(make-kill-destructor)) - (inputs `(("mingetty" ,mingetty) - ("motd" ,motd))) + (start #~(make-forkexec-constructor + (string-append #$mingetty "/sbin/mingetty") + "--noclear" #$tty)) + (stop #~(make-kill-destructor)) (pam-services ;; Let 'login' be known to PAM. All the mingetty services will have @@ -83,16 +83,17 @@ (define* (nscd-service #:key (glibc glibc-final)) "Return a service that runs libc's name service cache daemon (nscd)." - (mlet %store-monad ((nscd (package-file glibc "sbin/nscd"))) + (with-monad %store-monad (return (service (documentation "Run libc's name service cache daemon (nscd).") (provision '(nscd)) - (start `(make-forkexec-constructor ,nscd "-f" "/dev/null" - "--foreground")) - (stop `(make-kill-destructor)) + (start + #~(make-forkexec-constructor (string-append #$glibc "/sbin/nscd") + "-f" "/dev/null" + "--foreground")) + (stop #~(make-kill-destructor)) - (respawn? #f) - (inputs `(("glibc" ,glibc))))))) + (respawn? #f))))) (define (syslog-service) "Return a service that runs 'syslogd' with reasonable default settings." @@ -120,17 +121,17 @@ ") (mlet %store-monad - ((syslog.conf (text-file "syslog.conf" contents)) - (syslogd (package-file inetutils "libexec/syslogd"))) + ((syslog.conf (text-file "syslog.conf" contents))) (return (service (documentation "Run the syslog daemon (syslogd).") (provision '(syslogd)) - (start `(make-forkexec-constructor ,syslogd "--no-detach" - "--rcfile" ,syslog.conf)) - (stop `(make-kill-destructor)) - (inputs `(("inetutils" ,inetutils) - ("syslog.conf" ,syslog.conf))))))) + (start + #~(make-forkexec-constructor (string-append #$inetutils + "/libexec/syslogd") + "--no-detach" + "--rcfile" #$syslog.conf)) + (stop #~(make-kill-destructor)))))) (define* (guix-build-accounts count #:key (first-uid 30001) @@ -148,8 +149,7 @@ starting at FIRST-UID, and under GID." (gid gid) (comment (format #f "Guix Build User ~2d" n)) (home-directory "/var/empty") - (shell (package-file shadow "sbin/nologin")) - (inputs `(("shadow" ,shadow))))) + (shell #~(string-append #$shadow "/sbin/nologin")))) 1+ 1)))) @@ -157,16 +157,16 @@ starting at FIRST-UID, and under GID." (build-user-gid 30000) (build-accounts 10)) "Return a service that runs the build daemon from GUIX, and has BUILD-ACCOUNTS user accounts available under BUILD-USER-GID." - (mlet %store-monad ((daemon (package-file guix "bin/guix-daemon")) - (accounts (guix-build-accounts build-accounts + (mlet %store-monad ((accounts (guix-build-accounts build-accounts #:gid build-user-gid))) (return (service (provision '(guix-daemon)) - (start `(make-forkexec-constructor ,daemon - "--build-users-group" - ,builder-group)) - (stop `(make-kill-destructor)) - (inputs `(("guix" ,guix))) + (start + #~(make-forkexec-constructor (string-append #$guix + "/bin/guix-daemon") + "--build-users-group" + #$builder-group)) + (stop #~(make-kill-destructor)) (user-accounts accounts) (user-groups (list (user-group (name builder-group) diff --git a/gnu/services/dmd.scm b/gnu/services/dmd.scm index 54fb5cbfd6..c187c09857 100644 --- a/gnu/services/dmd.scm +++ b/gnu/services/dmd.scm @@ -17,6 +17,7 @@ ;;; along with GNU Guix. If not, see . (define-module (gnu services dmd) + #:use-module (guix gexp) #:use-module (guix monads) #:use-module (gnu services) #:use-module (ice-9 match) @@ -31,50 +32,50 @@ (define (dmd-configuration-file services etc) "Return the dmd configuration file for SERVICES, that initializes /etc from -ETC (the name of a directory in the store) on startup." +ETC (the derivation that builds the /etc directory) on startup." (define config - `(begin - (use-modules (ice-9 ftw)) + #~(begin + (use-modules (ice-9 ftw)) - (register-services - ,@(map (lambda (service) - `(make - #:docstring ',(service-documentation service) - #:provides ',(service-provision service) - #:requires ',(service-requirement service) - #:respawn? ',(service-respawn? service) - #:start ,(service-start service) - #:stop ,(service-stop service))) - services)) + (register-services + #$@(map (lambda (service) + #~(make + #:docstring '#$(service-documentation service) + #:provides '#$(service-provision service) + #:requires '#$(service-requirement service) + #:respawn? '#$(service-respawn? service) + #:start #$(service-start service) + #:stop #$(service-stop service))) + services)) - ;; /etc is a mixture of static and dynamic settings. Here is where we - ;; initialize it from the static part. - (format #t "populating /etc from ~a...~%" ,etc) - (let ((rm-f (lambda (f) - (false-if-exception (delete-file f))))) - (rm-f "/etc/static") - (symlink ,etc "/etc/static") - (for-each (lambda (file) - ;; TODO: Handle 'shadow' specially so that changed - ;; password aren't lost. - (let ((target (string-append "/etc/" file)) - (source (string-append "/etc/static/" file))) - (rm-f target) - (symlink source target))) - (scandir ,etc - (lambda (file) - (not (member file '("." "..")))))) + ;; /etc is a mixture of static and dynamic settings. Here is where we + ;; initialize it from the static part. + (format #t "populating /etc from ~a...~%" #$etc) + (let ((rm-f (lambda (f) + (false-if-exception (delete-file f))))) + (rm-f "/etc/static") + (symlink #$etc "/etc/static") + (for-each (lambda (file) + ;; TODO: Handle 'shadow' specially so that changed + ;; password aren't lost. + (let ((target (string-append "/etc/" file)) + (source (string-append "/etc/static/" file))) + (rm-f target) + (symlink source target))) + (scandir #$etc + (lambda (file) + (not (member file '("." "..")))))) - ;; Prevent ETC from being GC'd. - (rm-f "/var/guix/gcroots/etc-directory") - (symlink ,etc "/var/guix/gcroots/etc-directory")) + ;; Prevent ETC from being GC'd. + (rm-f "/var/guix/gcroots/etc-directory") + (symlink #$etc "/var/guix/gcroots/etc-directory")) - ;; guix-daemon 0.6 aborts if 'PATH' is undefined, so work around it. - (setenv "PATH" "/run/current-system/bin") + ;; guix-daemon 0.6 aborts if 'PATH' is undefined, so work around it. + (setenv "PATH" "/run/current-system/bin") - (format #t "starting services...~%") - (for-each start ',(append-map service-provision services)))) + (format #t "starting services...~%") + (for-each start '#$(append-map service-provision services)))) - (text-file "dmd.conf" (object->string config))) + (gexp->file "dmd.conf" config)) ;;; dmd.scm ends here diff --git a/gnu/services/networking.scm b/gnu/services/networking.scm index 317800db50..5522541735 100644 --- a/gnu/services/networking.scm +++ b/gnu/services/networking.scm @@ -20,6 +20,7 @@ #:use-module (gnu services) #:use-module (gnu packages admin) #:use-module (gnu packages linux) + #:use-module (guix gexp) #:use-module (guix monads) #:export (static-networking-service)) @@ -41,40 +42,41 @@ true, it must be a string specifying the default network gateway." ;; TODO: Eventually we should do this using Guile's networking procedures, ;; like 'configure-qemu-networking' does, but the patch that does this is ;; not yet in stock Guile. - (mlet %store-monad ((ifconfig (package-file inetutils "bin/ifconfig")) - (route (package-file net-tools "sbin/route"))) + (with-monad %store-monad (return (service (documentation (string-append "Set up networking on the '" interface "' interface using a static IP address.")) (provision '(networking)) - (start `(lambda _ - ;; Return #t if successfully started. - (and (zero? (system* ,ifconfig ,interface ,ip "up")) - ,(if gateway - `(zero? (system* ,route "add" "-net" "default" - "gw" ,gateway)) - #t) - ,(if (pair? name-servers) - `(call-with-output-file "/etc/resolv.conf" - (lambda (port) - (display - "# Generated by 'static-networking-service'.\n" - port) - (for-each (lambda (server) - (format port "nameserver ~a~%" - server)) - ',name-servers))) - #t)))) - (stop `(lambda _ + (start #~(lambda _ + ;; Return #t if successfully started. + (and (zero? (system* (string-append #$inetutils + "/bin/ifconfig") + #$interface #$ip "up")) + #$(if gateway + #~(zero? (system* (string-append #$net-tools + "/sbin/route") + "add" "-net" "default" + "gw" #$gateway)) + #t) + #$(if (pair? name-servers) + #~(call-with-output-file "/etc/resolv.conf" + (lambda (port) + (display + "# Generated by 'static-networking-service'.\n" + port) + (for-each (lambda (server) + (format port "nameserver ~a~%" + server)) + '#$name-servers))) + #t)))) + (stop #~(lambda _ ;; Return #f is successfully stopped. - (not (and (system* ,ifconfig ,interface "down") - (system* ,route "del" "-net" "default"))))) - (respawn? #f) - (inputs `(("inetutils" ,inetutils) - ,@(if gateway - `(("net-tools" ,net-tools)) - '()))))))) + (not (and (system* (string-append #$inetutils "/sbin/ifconfig") + #$interface "down") + (system* (string-append #$net-tools "/sbin/route") + "del" "-net" "default"))))) + (respawn? #f))))) ;;; networking.scm ends here diff --git a/gnu/services/xorg.scm b/gnu/services/xorg.scm index 086150a658..81b5bc17a5 100644 --- a/gnu/services/xorg.scm +++ b/gnu/services/xorg.scm @@ -27,6 +27,7 @@ #:use-module (gnu packages gnustep) #:use-module (gnu packages admin) #:use-module (gnu packages bash) + #:use-module (guix gexp) #:use-module (guix monads) #:use-module (guix derivations) #:export (xorg-start-command @@ -190,9 +191,7 @@ reboot_cmd " dmd "/sbin/reboot (string-append "auto_login yes\ndefault_user " default-user) "")))) - (mlet %store-monad ((slim-bin (package-file slim "bin/slim")) - (bash-bin (package-file bash "bin/bash")) - (slim.cfg (slim.cfg))) + (mlet %store-monad ((slim.cfg (slim.cfg))) (return (service (documentation "Xorg display server") @@ -200,15 +199,11 @@ reboot_cmd " dmd "/sbin/reboot (requirement '(host-name)) (start ;; XXX: Work around the inability to specify env. vars. directly. - `(make-forkexec-constructor - ,bash-bin "-c" - ,(string-append "SLIM_CFGFILE=" (derivation->output-path slim.cfg) - " " slim-bin - " -nodaemon"))) - (stop `(make-kill-destructor)) - (inputs `(("slim" ,slim) - ("slim.cfg" ,slim.cfg) - ("bash" ,bash))) + #~(make-forkexec-constructor + (string-append #$bash "/bin/sh") "-c" + (string-append "SLIM_CFGFILE=" #$slim.cfg + " " #$slim "/bin/slim" " -nodaemon"))) + (stop #~(make-kill-destructor)) (respawn? #t) (pam-services ;; Tell PAM about 'slim'. -- cgit v1.2.3