d51bfe242f
* gnu.scm (%try-use-modules): Use 'formatted-message' instead of
'&message'.
* gnu/machine/digital-ocean.scm (maybe-raise-unsupported-configuration-error):
Likewise.
* gnu/machine/ssh.scm (machine-check-file-system-availability): Likewise.
(machine-check-building-for-appropriate-system): Likewise.
(deploy-managed-host): Likewise.
(maybe-raise-unsupported-configuration-error): Likewise.
* gnu/packages.scm (search-patch): Likewise.
* gnu/services.scm (%service-with-default-value): Likewise.
(files->etc-directory): Likewise.
(fold-services): Likewise.
* gnu/system.scm (locale-name->definition*): Likewise.
* gnu/system/mapped-devices.scm (check-device-initrd-modules): Likewise.
(check-luks-device): Likewise.
* guix/channels.scm (latest-channel-instance): Likewise.
* guix/cve.scm (json->cve-items): Likewise.
* guix/git-authenticate.scm (commit-signing-key): Likewise.
(commit-authorized-keys): Likewise.
(authenticate-commit): Likewise.
(verify-introductory-commit): Likewise.
* guix/remote.scm (remote-pipe-for-gexp): Likewise.
* guix/scripts/graph.scm (assert-package): Likewise.
* guix/scripts/offload.scm (private-key-from-file*): Likewise.
* guix/ssh.scm (authenticate-server*): Likewise.
(open-ssh-session): Likewise.
(remote-inferior): Likewise.
* guix/ui.scm (matching-generations): Likewise.
* guix/upstream.scm (package-update): Likewise.
* tests/channels.scm ("latest-channel-instances, missing introduction for 'guix'"):
Catch 'formatted-message?'.
("authenticate-channel, wrong first commit signer"): Likewise.
* tests/lint.scm ("patches: not found"): Adjust message string.
* tests/packages.scm ("patch not found yields a run-time error"): Catch
'formatted-message?'.
* guix/lint.scm (check-patch-file-names): Handle 'formatted-message?'.
(check-derivation): Ditto.
1019 lines
39 KiB
Scheme
1019 lines
39 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
|
||
;;; Copyright © 2015, 2016, 2017, 2018, 2019, 2020 Ludovic Courtès <ludo@gnu.org>
|
||
;;; Copyright © 2016 Chris Marusich <cmmarusich@gmail.com>
|
||
;;; Copyright © 2020 Jan (janneke) Nieuwenhuizen <janneke@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 services)
|
||
#:use-module (guix gexp)
|
||
#:use-module (guix monads)
|
||
#:use-module (guix store)
|
||
#:use-module (guix records)
|
||
#:use-module (guix profiles)
|
||
#:use-module (guix discovery)
|
||
#:use-module (guix combinators)
|
||
#:use-module (guix channels)
|
||
#:use-module (guix describe)
|
||
#:use-module (guix sets)
|
||
#:use-module (guix ui)
|
||
#:use-module (guix diagnostics)
|
||
#:autoload (guix openpgp) (openpgp-format-fingerprint)
|
||
#:use-module (guix modules)
|
||
#:use-module (gnu packages base)
|
||
#:use-module (gnu packages bash)
|
||
#:use-module (gnu packages hurd)
|
||
#:use-module (srfi srfi-1)
|
||
#:use-module (srfi srfi-9)
|
||
#:use-module (srfi srfi-9 gnu)
|
||
#:use-module (srfi srfi-26)
|
||
#:use-module (srfi srfi-34)
|
||
#:use-module (srfi srfi-35)
|
||
#:use-module (ice-9 vlist)
|
||
#:use-module (ice-9 match)
|
||
#:autoload (ice-9 pretty-print) (pretty-print)
|
||
#:export (service-extension
|
||
service-extension?
|
||
service-extension-target
|
||
service-extension-compute
|
||
|
||
service-type
|
||
service-type?
|
||
service-type-name
|
||
service-type-extensions
|
||
service-type-compose
|
||
service-type-extend
|
||
service-type-default-value
|
||
service-type-description
|
||
service-type-location
|
||
|
||
%service-type-path
|
||
fold-service-types
|
||
lookup-service-types
|
||
|
||
service
|
||
service?
|
||
service-kind
|
||
service-value
|
||
service-parameters ;deprecated
|
||
|
||
simple-service
|
||
modify-services
|
||
service-back-edges
|
||
instantiate-missing-services
|
||
fold-services
|
||
|
||
service-error?
|
||
missing-value-service-error?
|
||
missing-value-service-error-type
|
||
missing-value-service-error-location
|
||
missing-target-service-error?
|
||
missing-target-service-error-service
|
||
missing-target-service-error-target-type
|
||
ambiguous-target-service-error?
|
||
ambiguous-target-service-error-service
|
||
ambiguous-target-service-error-target-type
|
||
|
||
system-service-type
|
||
provenance-service-type
|
||
system-provenance
|
||
boot-service-type
|
||
cleanup-service-type
|
||
activation-service-type
|
||
activation-service->script
|
||
%linux-bare-metal-service
|
||
%hurd-rc-script
|
||
%hurd-startup-service
|
||
special-files-service-type
|
||
extra-special-file
|
||
etc-service-type
|
||
etc-directory
|
||
setuid-program-service-type
|
||
profile-service-type
|
||
firmware-service-type
|
||
gc-root-service-type
|
||
|
||
%boot-service
|
||
%activation-service
|
||
etc-service))
|
||
|
||
;;; Comment:
|
||
;;;
|
||
;;; This module defines a broad notion of "service types" and "services."
|
||
;;;
|
||
;;; A service type describe how its instances extend instances of other
|
||
;;; service types. For instance, some services extend the instance of
|
||
;;; ACCOUNT-SERVICE-TYPE by providing it with accounts and groups to create;
|
||
;;; others extend SHEPHERD-ROOT-SERVICE-TYPE by passing it instances of
|
||
;;; <shepherd-service>.
|
||
;;;
|
||
;;; When applicable, the service type defines how it can itself be extended,
|
||
;;; by providing one procedure to compose extensions, and one procedure to
|
||
;;; extend itself.
|
||
;;;
|
||
;;; A notable service type is SYSTEM-SERVICE-TYPE, which has a single
|
||
;;; instance, which is the root of the service DAG. Its value is the
|
||
;;; derivation that produces the 'system' directory as returned by
|
||
;;; 'operating-system-derivation'.
|
||
;;;
|
||
;;; The 'fold-services' procedure can be passed a list of procedures, which it
|
||
;;; "folds" by propagating extensions down the graph; it returns the root
|
||
;;; service after the applying all its extensions.
|
||
;;;
|
||
;;; Code:
|
||
|
||
(define-record-type <service-extension>
|
||
(service-extension target compute)
|
||
service-extension?
|
||
(target service-extension-target) ;<service-type>
|
||
(compute service-extension-compute)) ;params -> params
|
||
|
||
(define &no-default-value
|
||
;; Value used to denote service types that have no associated default value.
|
||
'(no default value))
|
||
|
||
(define-record-type* <service-type> service-type make-service-type
|
||
service-type?
|
||
(name service-type-name) ;symbol (for debugging)
|
||
|
||
;; Things extended by services of this type.
|
||
(extensions service-type-extensions) ;list of <service-extensions>
|
||
|
||
;; Given a list of extensions, "compose" them.
|
||
(compose service-type-compose ;list of Any -> Any
|
||
(default #f))
|
||
|
||
;; Extend the services' own parameters with the extension composition.
|
||
(extend service-type-extend ;list of Any -> parameters
|
||
(default #f))
|
||
|
||
;; Optional default value for instances of this type.
|
||
(default-value service-type-default-value ;Any
|
||
(default &no-default-value))
|
||
|
||
;; Meta-data.
|
||
(description service-type-description ;string
|
||
(default #f))
|
||
(location service-type-location ;<location>
|
||
(default (and=> (current-source-location)
|
||
source-properties->location))
|
||
(innate)))
|
||
|
||
(define (write-service-type type port)
|
||
(format port "#<service-type ~a ~a>"
|
||
(service-type-name type)
|
||
(number->string (object-address type) 16)))
|
||
|
||
(set-record-type-printer! <service-type> write-service-type)
|
||
|
||
(define %distro-root-directory
|
||
;; Absolute file name of the module hierarchy.
|
||
(dirname (search-path %load-path "guix.scm")))
|
||
|
||
(define %service-type-path
|
||
;; Search path for service types.
|
||
(make-parameter `((,%distro-root-directory . "gnu/services")
|
||
(,%distro-root-directory . "gnu/system"))))
|
||
|
||
(define (all-service-modules)
|
||
"Return the default set of service modules."
|
||
(cons (resolve-interface '(gnu services))
|
||
(all-modules (%service-type-path)
|
||
#:warn warn-about-load-error)))
|
||
|
||
(define* (fold-service-types proc seed
|
||
#:optional
|
||
(modules (all-service-modules)))
|
||
"For each service type exported by one of MODULES, call (PROC RESULT). SEED
|
||
is used as the initial value of RESULT."
|
||
(fold-module-public-variables (lambda (object result)
|
||
(if (service-type? object)
|
||
(proc object result)
|
||
result))
|
||
seed
|
||
modules))
|
||
|
||
(define lookup-service-types
|
||
(let ((table
|
||
(delay (fold-service-types (lambda (type result)
|
||
(vhash-consq (service-type-name type)
|
||
type result))
|
||
vlist-null))))
|
||
(lambda (name)
|
||
"Return the list of services with the given NAME (a symbol)."
|
||
(vhash-foldq* cons '() name (force table)))))
|
||
|
||
;; Services of a given type.
|
||
(define-record-type <service>
|
||
(make-service type value)
|
||
service?
|
||
(type service-kind)
|
||
(value service-value))
|
||
|
||
(define-syntax service
|
||
(syntax-rules ()
|
||
"Return a service instance of TYPE. The service value is VALUE or, if
|
||
omitted, TYPE's default value."
|
||
((_ type value)
|
||
(make-service type value))
|
||
((_ type)
|
||
(%service-with-default-value (current-source-location)
|
||
type))))
|
||
|
||
(define (%service-with-default-value location type)
|
||
"Return a instance of service type TYPE with its default value, if any. If
|
||
TYPE does not have a default value, an error is raised."
|
||
;; TODO: Currently this is a run-time error but with a little bit macrology
|
||
;; we could turn it into an expansion-time error.
|
||
(let ((default (service-type-default-value type)))
|
||
(if (eq? default &no-default-value)
|
||
(let ((location (source-properties->location location)))
|
||
(raise
|
||
(make-compound-condition
|
||
(condition
|
||
(&missing-value-service-error (type type) (location location)))
|
||
(formatted-message (G_ "~a: no value specified \
|
||
for service of type '~a'")
|
||
(location->string location)
|
||
(service-type-name type)))))
|
||
(service type default))))
|
||
|
||
(define-condition-type &service-error &error
|
||
service-error?)
|
||
|
||
(define-condition-type &missing-value-service-error &service-error
|
||
missing-value-service-error?
|
||
(type missing-value-service-error-type)
|
||
(location missing-value-service-error-location))
|
||
|
||
|
||
|
||
;;;
|
||
;;; Helpers.
|
||
;;;
|
||
|
||
(define service-parameters
|
||
;; Deprecated alias.
|
||
service-value)
|
||
|
||
(define (simple-service name target value)
|
||
"Return a service that extends TARGET with VALUE. This works by creating a
|
||
singleton service type NAME, of which the returned service is an instance."
|
||
(let* ((extension (service-extension target identity))
|
||
(type (service-type (name name)
|
||
(extensions (list extension)))))
|
||
(service type value)))
|
||
|
||
(define-syntax %modify-service
|
||
(syntax-rules (=>)
|
||
((_ service)
|
||
service)
|
||
((_ svc (kind param => exp ...) clauses ...)
|
||
(if (eq? (service-kind svc) kind)
|
||
(let ((param (service-value svc)))
|
||
(service (service-kind svc)
|
||
(begin exp ...)))
|
||
(%modify-service svc clauses ...)))))
|
||
|
||
(define-syntax modify-services
|
||
(syntax-rules ()
|
||
"Modify the services listed in SERVICES according to CLAUSES and return
|
||
the resulting list of services. Each clause must have the form:
|
||
|
||
(TYPE VARIABLE => BODY)
|
||
|
||
where TYPE is a service type, such as 'guix-service-type', and VARIABLE is an
|
||
identifier that is bound within BODY to the value of the service of that
|
||
TYPE. Consider this example:
|
||
|
||
(modify-services %base-services
|
||
(guix-service-type config =>
|
||
(guix-configuration
|
||
(inherit config)
|
||
(use-substitutes? #f)
|
||
(extra-options '(\"--gc-keep-derivations\"))))
|
||
(mingetty-service-type config =>
|
||
(mingetty-configuration
|
||
(inherit config)
|
||
(motd (plain-file \"motd\" \"Hi there!\")))))
|
||
|
||
It changes the configuration of the GUIX-SERVICE-TYPE instance, and that of
|
||
all the MINGETTY-SERVICE-TYPE instances.
|
||
|
||
This is a shorthand for (map (lambda (svc) ...) %base-services)."
|
||
((_ services clauses ...)
|
||
(map (lambda (service)
|
||
(%modify-service service clauses ...))
|
||
services))))
|
||
|
||
|
||
;;;
|
||
;;; Core services.
|
||
;;;
|
||
|
||
(define (system-derivation entries mextensions)
|
||
"Return as a monadic value the derivation of the 'system' directory
|
||
containing the given entries."
|
||
(mlet %store-monad ((extensions (mapm/accumulate-builds identity
|
||
mextensions)))
|
||
(lower-object
|
||
(file-union "system"
|
||
(append entries (concatenate extensions))))))
|
||
|
||
(define system-service-type
|
||
;; This is the ultimate service type, the root of the service DAG. The
|
||
;; service of this type is extended by monadic name/item pairs. These items
|
||
;; end up in the "system directory" as returned by
|
||
;; 'operating-system-derivation'.
|
||
(service-type (name 'system)
|
||
(extensions '())
|
||
(compose identity)
|
||
(extend system-derivation)
|
||
(description
|
||
"Build the operating system top-level directory, which in
|
||
turn refers to everything the operating system needs: its kernel, initrd,
|
||
system profile, boot script, and so on.")))
|
||
|
||
(define (compute-boot-script _ gexps)
|
||
;; Reverse GEXPS so that extensions appear in the boot script in the right
|
||
;; order. That is, user extensions would come first, and extensions added
|
||
;; by 'essential-services' (e.g., running shepherd) are guaranteed to come
|
||
;; last.
|
||
(gexp->file "boot"
|
||
;; Clean up and activate the system, then spawn shepherd.
|
||
#~(begin #$@(reverse gexps))))
|
||
|
||
(define (boot-script-entry mboot)
|
||
"Return, as a monadic value, an entry for the boot script in the system
|
||
directory."
|
||
(mlet %store-monad ((boot mboot))
|
||
(return `(("boot" ,boot)))))
|
||
|
||
(define boot-service-type
|
||
;; The service of this type is extended by being passed gexps. It
|
||
;; aggregates them in a single script, as a monadic value, which becomes its
|
||
;; value.
|
||
(service-type (name 'boot)
|
||
(extensions
|
||
(list (service-extension system-service-type
|
||
boot-script-entry)))
|
||
(compose identity)
|
||
(extend compute-boot-script)
|
||
(description
|
||
"Produce the operating system's boot script, which is spawned
|
||
by the initrd once the root file system is mounted.")))
|
||
|
||
(define %boot-service
|
||
;; The service that produces the boot script.
|
||
(service boot-service-type #t))
|
||
|
||
|
||
;;;
|
||
;;; Provenance tracking.
|
||
;;;
|
||
|
||
(define (object->pretty-string obj)
|
||
"Like 'object->string', but using 'pretty-print'."
|
||
(call-with-output-string
|
||
(lambda (port)
|
||
(pretty-print obj port))))
|
||
|
||
(define (channel->code channel)
|
||
"Return code to build CHANNEL, ready to be dropped in a 'channels.scm'
|
||
file."
|
||
;; Since the 'introduction' field is backward-incompatible, and since it's
|
||
;; optional when using the "official" 'guix channel, include it if and only
|
||
;; if we're referring to a different channel.
|
||
(let ((intro (and (not (equal? (list channel) %default-channels))
|
||
(channel-introduction channel))))
|
||
`(channel (name ',(channel-name channel))
|
||
(url ,(channel-url channel))
|
||
(branch ,(channel-branch channel))
|
||
(commit ,(channel-commit channel))
|
||
,@(if intro
|
||
`((introduction
|
||
(make-channel-introduction
|
||
,(channel-introduction-first-signed-commit intro)
|
||
(openpgp-fingerprint
|
||
,(openpgp-format-fingerprint
|
||
(channel-introduction-first-commit-signer
|
||
intro))))))
|
||
'()))))
|
||
|
||
(define (channel->sexp channel)
|
||
"Return an sexp describing CHANNEL. The sexp is _not_ code and is meant to
|
||
be parsed by tools; it's potentially more future-proof than code."
|
||
;; TODO: Add CHANNEL's introduction. Currently we can't do that because
|
||
;; older 'guix system describe' expect exactly name/url/branch/commit
|
||
;; without any additional fields.
|
||
`(channel (name ,(channel-name channel))
|
||
(url ,(channel-url channel))
|
||
(branch ,(channel-branch channel))
|
||
(commit ,(channel-commit channel))))
|
||
|
||
(define (sexp->channel sexp)
|
||
"Return the channel corresponding to SEXP, an sexp as found in the
|
||
\"provenance\" file produced by 'provenance-service-type'."
|
||
(match sexp
|
||
(('channel ('name name)
|
||
('url url)
|
||
('branch branch)
|
||
('commit commit)
|
||
rest ...)
|
||
;; XXX: In the future REST may include a channel introduction.
|
||
(channel (name name) (url url)
|
||
(branch branch) (commit commit)))))
|
||
|
||
(define (provenance-file channels config-file)
|
||
"Return a 'provenance' file describing CHANNELS, a list of channels, and
|
||
CONFIG-FILE, which can be either #f or a <local-file> containing the OS
|
||
configuration being used."
|
||
(scheme-file "provenance"
|
||
#~(provenance
|
||
(version 0)
|
||
(channels #+@(if channels
|
||
(map channel->sexp channels)
|
||
'()))
|
||
(configuration-file #+config-file))))
|
||
|
||
(define (provenance-entry config-file)
|
||
"Return system entries describing the operating system provenance: the
|
||
channels in use and CONFIG-FILE, if it is true."
|
||
(define profile
|
||
(current-profile))
|
||
|
||
(define channels
|
||
(and=> profile profile-channels))
|
||
|
||
(mbegin %store-monad
|
||
(let ((config-file (cond ((string? config-file)
|
||
(local-file config-file "configuration.scm"))
|
||
((not config-file)
|
||
#f)
|
||
(else
|
||
config-file))))
|
||
(return `(("provenance" ,(provenance-file channels config-file))
|
||
,@(if channels
|
||
`(("channels.scm"
|
||
,(plain-file "channels.scm"
|
||
(object->pretty-string
|
||
`(list
|
||
,@(map channel->code channels))))))
|
||
'())
|
||
,@(if config-file
|
||
`(("configuration.scm" ,config-file))
|
||
'()))))))
|
||
|
||
(define provenance-service-type
|
||
(service-type (name 'provenance)
|
||
(extensions
|
||
(list (service-extension system-service-type
|
||
provenance-entry)))
|
||
(default-value #f) ;the OS config file
|
||
(description
|
||
"Store provenance information about the system in the system
|
||
itself: the channels used when building the system, and its configuration
|
||
file, when available.")))
|
||
|
||
(define (system-provenance system)
|
||
"Given SYSTEM, the file name of a system generation, return two values: the
|
||
list of channels SYSTEM is built from, and its configuration file. If that
|
||
information is missing, return the empty list (for channels) and possibly
|
||
#false (for the configuration file)."
|
||
(catch 'system-error
|
||
(lambda ()
|
||
(match (call-with-input-file (string-append system "/provenance")
|
||
read)
|
||
(('provenance ('version 0)
|
||
('channels channels ...)
|
||
('configuration-file config-file))
|
||
(values (map sexp->channel channels)
|
||
config-file))
|
||
(_
|
||
(values '() #f))))
|
||
(lambda _
|
||
(values '() #f))))
|
||
|
||
;;;
|
||
;;; Cleanup.
|
||
;;;
|
||
|
||
(define (cleanup-gexp _)
|
||
"Return a gexp to clean up /tmp and similar places upon boot."
|
||
(with-imported-modules '((guix build utils))
|
||
#~(begin
|
||
(use-modules (guix build utils))
|
||
|
||
;; Clean out /tmp and /var/run.
|
||
;;
|
||
;; XXX This needs to happen before service activations, so it
|
||
;; has to be here, but this also implicitly assumes that /tmp
|
||
;; and /var/run are on the root partition.
|
||
(letrec-syntax ((fail-safe (syntax-rules ()
|
||
((_ exp rest ...)
|
||
(begin
|
||
(catch 'system-error
|
||
(lambda () exp)
|
||
(const #f))
|
||
(fail-safe rest ...)))
|
||
((_)
|
||
#t))))
|
||
;; Ignore I/O errors so the system can boot.
|
||
(fail-safe
|
||
;; Remove stale Shadow lock files as they would lead to
|
||
;; failures of 'useradd' & co.
|
||
(delete-file "/etc/group.lock")
|
||
(delete-file "/etc/passwd.lock")
|
||
(delete-file "/etc/.pwd.lock") ;from 'lckpwdf'
|
||
|
||
;; Force file names to be decoded as UTF-8. See
|
||
;; <https://bugs.gnu.org/26353>.
|
||
(setenv "GUIX_LOCPATH"
|
||
#+(file-append glibc-utf8-locales "/lib/locale"))
|
||
(setlocale LC_CTYPE "en_US.utf8")
|
||
(delete-file-recursively "/tmp")
|
||
(delete-file-recursively "/var/run")
|
||
|
||
(mkdir "/tmp")
|
||
(chmod "/tmp" #o1777)
|
||
(mkdir "/var/run")
|
||
(chmod "/var/run" #o755)
|
||
(delete-file-recursively "/run/udev/watch.old"))))))
|
||
|
||
(define cleanup-service-type
|
||
;; Service that cleans things up in /tmp and similar.
|
||
(service-type (name 'cleanup)
|
||
(extensions
|
||
(list (service-extension boot-service-type
|
||
cleanup-gexp)))
|
||
(description
|
||
"Delete files from @file{/tmp}, @file{/var/run}, and other
|
||
temporary locations at boot time.")))
|
||
|
||
(define* (activation-service->script service)
|
||
"Return as a monadic value the activation script for SERVICE, a service of
|
||
ACTIVATION-SCRIPT-TYPE."
|
||
(activation-script (service-value service)))
|
||
|
||
(define (activation-script gexps)
|
||
"Return the system's activation script, which evaluates GEXPS."
|
||
(define actions
|
||
(map (cut program-file "activate-service.scm" <>) gexps))
|
||
|
||
(program-file "activate.scm"
|
||
(with-imported-modules (source-module-closure
|
||
'((gnu build activation)
|
||
(guix build utils)))
|
||
#~(begin
|
||
(use-modules (gnu build activation)
|
||
(guix build utils))
|
||
|
||
;; Make sure the user accounting database exists. If it
|
||
;; does not exist, 'setutxent' does not create it and
|
||
;; thus there is no accounting at all.
|
||
(close-port (open-file "/var/run/utmpx" "a0"))
|
||
|
||
;; Same for 'wtmp', which is populated by mingetty et
|
||
;; al.
|
||
(mkdir-p "/var/log")
|
||
(close-port (open-file "/var/log/wtmp" "a0"))
|
||
|
||
;; Set up /run/current-system. Among other things this
|
||
;; sets up locales, which the activation snippets
|
||
;; executed below may expect.
|
||
(activate-current-system)
|
||
|
||
;; Run the services' activation snippets.
|
||
;; TODO: Use 'load-compiled'.
|
||
(for-each primitive-load '#$actions)))))
|
||
|
||
(define (gexps->activation-gexp gexps)
|
||
"Return a gexp that runs the activation script containing GEXPS."
|
||
#~(primitive-load #$(activation-script gexps)))
|
||
|
||
(define (second-argument a b) b)
|
||
|
||
(define activation-service-type
|
||
(service-type (name 'activate)
|
||
(extensions
|
||
(list (service-extension boot-service-type
|
||
gexps->activation-gexp)))
|
||
(compose identity)
|
||
(extend second-argument)
|
||
(description
|
||
"Run @dfn{activation} code at boot time and upon
|
||
@command{guix system reconfigure} completion.")))
|
||
|
||
(define %activation-service
|
||
;; The activation service produces the activation script from the gexps it
|
||
;; receives.
|
||
(service activation-service-type #t))
|
||
|
||
(define %modprobe-wrapper
|
||
;; Wrapper for the 'modprobe' command that knows where modules live.
|
||
;;
|
||
;; This wrapper is typically invoked by the Linux kernel ('call_modprobe',
|
||
;; in kernel/kmod.c), a situation where the 'LINUX_MODULE_DIRECTORY'
|
||
;; environment variable is not set---hence the need for this wrapper.
|
||
(let ((modprobe "/run/current-system/profile/bin/modprobe"))
|
||
(program-file "modprobe"
|
||
#~(begin
|
||
(setenv "LINUX_MODULE_DIRECTORY"
|
||
"/run/booted-system/kernel/lib/modules")
|
||
;; FIXME: Remove this crutch when the patch #40422,
|
||
;; updating to kmod 27 is merged.
|
||
(setenv "MODPROBE_OPTIONS"
|
||
"-C /etc/modprobe.d")
|
||
(apply execl #$modprobe
|
||
(cons #$modprobe (cdr (command-line))))))))
|
||
|
||
(define %linux-kernel-activation
|
||
;; Activation of the Linux kernel running on the bare metal (as opposed to
|
||
;; running in a container.)
|
||
#~(begin
|
||
;; Tell the kernel to use our 'modprobe' command.
|
||
(activate-modprobe #$%modprobe-wrapper)
|
||
|
||
;; Let users debug their own processes!
|
||
(activate-ptrace-attach)))
|
||
|
||
(define %linux-bare-metal-service
|
||
;; The service that does things that are needed on the "bare metal", but not
|
||
;; necessary or impossible in a container.
|
||
(simple-service 'linux-bare-metal
|
||
activation-service-type
|
||
%linux-kernel-activation))
|
||
|
||
(define %hurd-rc-script
|
||
;; The RC script to be started upon boot.
|
||
(program-file "rc"
|
||
(with-imported-modules (source-module-closure
|
||
'((guix build utils)
|
||
(gnu build hurd-boot)
|
||
(guix build syscalls)))
|
||
#~(begin
|
||
(use-modules (guix build utils)
|
||
(gnu build hurd-boot)
|
||
(guix build syscalls)
|
||
(ice-9 match)
|
||
(system repl repl)
|
||
(srfi srfi-1)
|
||
(srfi srfi-26))
|
||
(boot-hurd-system)))))
|
||
|
||
(define (hurd-rc-entry rc)
|
||
"Return, as a monadic value, an entry for the RC script in the system
|
||
directory."
|
||
(mlet %store-monad ((rc (lower-object rc)))
|
||
(return `(("rc" ,rc)))))
|
||
|
||
(define hurd-startup-service-type
|
||
;; The service that creates the initial SYSTEM/rc startup file.
|
||
(service-type (name 'startup)
|
||
(extensions
|
||
(list (service-extension system-service-type hurd-rc-entry)))
|
||
(default-value %hurd-rc-script)))
|
||
|
||
(define %hurd-startup-service
|
||
;; The service that produces the RC script.
|
||
(service hurd-startup-service-type %hurd-rc-script))
|
||
|
||
(define special-files-service-type
|
||
;; Service to install "special files" such as /bin/sh and /usr/bin/env.
|
||
(service-type
|
||
(name 'special-files)
|
||
(extensions
|
||
(list (service-extension activation-service-type
|
||
(lambda (files)
|
||
#~(activate-special-files '#$files)))))
|
||
(compose concatenate)
|
||
(extend append)
|
||
(description
|
||
"Add special files to the root file system---e.g.,
|
||
@file{/usr/bin/env}.")))
|
||
|
||
(define (extra-special-file file target)
|
||
"Use TARGET as the \"special file\" FILE. For example, TARGET might be
|
||
(file-append coreutils \"/bin/env\")
|
||
and FILE could be \"/usr/bin/env\"."
|
||
(simple-service (string->symbol (string-append "special-file-" file))
|
||
special-files-service-type
|
||
`((,file ,target))))
|
||
|
||
(define (etc-directory service)
|
||
"Return the directory for SERVICE, a service of type ETC-SERVICE-TYPE."
|
||
(files->etc-directory (service-value service)))
|
||
|
||
(define (files->etc-directory files)
|
||
(define (assert-no-duplicates files)
|
||
(let loop ((files files)
|
||
(seen (set)))
|
||
(match files
|
||
(() #t)
|
||
(((file _) rest ...)
|
||
(when (set-contains? seen file)
|
||
(raise (formatted-message (G_ "duplicate '~a' entry for /etc")
|
||
file)))
|
||
(loop rest (set-insert file seen))))))
|
||
|
||
;; Detect duplicates early instead of letting them through, eventually
|
||
;; leading to a build failure of "etc.drv".
|
||
(assert-no-duplicates files)
|
||
|
||
(file-union "etc" files))
|
||
|
||
(define (etc-entry files)
|
||
"Return an entry for the /etc directory consisting of FILES in the system
|
||
directory."
|
||
(with-monad %store-monad
|
||
(return `(("etc" ,(files->etc-directory files))))))
|
||
|
||
(define etc-service-type
|
||
(service-type (name 'etc)
|
||
(extensions
|
||
(list
|
||
(service-extension activation-service-type
|
||
(lambda (files)
|
||
(let ((etc
|
||
(files->etc-directory files)))
|
||
#~(activate-etc #$etc))))
|
||
(service-extension system-service-type etc-entry)))
|
||
(compose concatenate)
|
||
(extend append)
|
||
(description "Populate the @file{/etc} directory.")))
|
||
|
||
(define (etc-service files)
|
||
"Return a new service of ETC-SERVICE-TYPE that populates /etc with FILES.
|
||
FILES must be a list of name/file-like object pairs."
|
||
(service etc-service-type files))
|
||
|
||
(define setuid-program-service-type
|
||
(service-type (name 'setuid-program)
|
||
(extensions
|
||
(list (service-extension activation-service-type
|
||
(lambda (programs)
|
||
#~(activate-setuid-programs
|
||
(list #$@programs))))))
|
||
(compose concatenate)
|
||
(extend append)
|
||
(description
|
||
"Populate @file{/run/setuid-programs} with the specified
|
||
executables, making them setuid-root.")))
|
||
|
||
(define (packages->profile-entry packages)
|
||
"Return a system entry for the profile containing PACKAGES."
|
||
(with-monad %store-monad
|
||
(return `(("profile" ,(profile
|
||
(content (packages->manifest
|
||
(delete-duplicates packages eq?)))))))))
|
||
|
||
(define profile-service-type
|
||
;; The service that populates the system's profile---i.e.,
|
||
;; /run/current-system/profile. It is extended by package lists.
|
||
(service-type (name 'profile)
|
||
(extensions
|
||
(list (service-extension system-service-type
|
||
packages->profile-entry)))
|
||
(compose concatenate)
|
||
(extend append)
|
||
(description
|
||
"This is the @dfn{system profile}, available as
|
||
@file{/run/current-system/profile}. It contains packages that the sysadmin
|
||
wants to be globally available to all the system users.")))
|
||
|
||
(define (firmware->activation-gexp firmware)
|
||
"Return a gexp to make the packages listed in FIRMWARE loadable by the
|
||
kernel."
|
||
(let ((directory (directory-union "firmware" firmware)))
|
||
;; Tell the kernel where firmware is.
|
||
#~(activate-firmware (string-append #$directory "/lib/firmware"))))
|
||
|
||
(define firmware-service-type
|
||
;; The service that collects firmware.
|
||
(service-type (name 'firmware)
|
||
(extensions
|
||
(list (service-extension activation-service-type
|
||
firmware->activation-gexp)))
|
||
(compose concatenate)
|
||
(extend append)
|
||
(description
|
||
"Make ``firmware'' files loadable by the operating system
|
||
kernel. Firmware may then be uploaded to some of the machine's devices, such
|
||
as Wifi cards.")))
|
||
|
||
(define (gc-roots->system-entry roots)
|
||
"Return an entry in the system's output containing symlinks to ROOTS."
|
||
(mlet %store-monad ((entry (gexp->derivation
|
||
"gc-roots"
|
||
#~(let ((roots '#$roots))
|
||
(mkdir #$output)
|
||
(chdir #$output)
|
||
(for-each symlink
|
||
roots
|
||
(map number->string
|
||
(iota (length roots))))))))
|
||
(return (if (null? roots)
|
||
'()
|
||
`(("gc-roots" ,entry))))))
|
||
|
||
(define gc-root-service-type
|
||
;; A service to associate extra garbage-collector roots to the system. This
|
||
;; is a simple hack that guarantees that the system retains references to
|
||
;; the given list of roots. Roots must be "lowerable" objects like
|
||
;; packages, or derivations.
|
||
(service-type (name 'gc-roots)
|
||
(extensions
|
||
(list (service-extension system-service-type
|
||
gc-roots->system-entry)))
|
||
(compose concatenate)
|
||
(extend append)
|
||
(description
|
||
"Register garbage-collector roots---i.e., store items that
|
||
will not be reclaimed by the garbage collector.")
|
||
(default-value '())))
|
||
|
||
|
||
;;;
|
||
;;; Service folding.
|
||
;;;
|
||
|
||
(define-condition-type &missing-target-service-error &service-error
|
||
missing-target-service-error?
|
||
(service missing-target-service-error-service)
|
||
(target-type missing-target-service-error-target-type))
|
||
|
||
(define-condition-type &ambiguous-target-service-error &service-error
|
||
ambiguous-target-service-error?
|
||
(service ambiguous-target-service-error-service)
|
||
(target-type ambiguous-target-service-error-target-type))
|
||
|
||
(define (missing-target-error service target-type)
|
||
(raise
|
||
(condition (&missing-target-service-error
|
||
(service service)
|
||
(target-type target-type))
|
||
(&message
|
||
(message
|
||
(format #f (G_ "no target of type '~a' for service '~a'")
|
||
(service-type-name target-type)
|
||
(service-type-name
|
||
(service-kind service))))))))
|
||
|
||
(define (service-back-edges services)
|
||
"Return a procedure that, when passed a <service>, returns the list of
|
||
<service> objects that depend on it."
|
||
(define (add-edges service edges)
|
||
(define (add-edge extension edges)
|
||
(let ((target-type (service-extension-target extension)))
|
||
(match (filter (lambda (service)
|
||
(eq? (service-kind service) target-type))
|
||
services)
|
||
((target)
|
||
(vhash-consq target service edges))
|
||
(()
|
||
(missing-target-error service target-type))
|
||
(x
|
||
(raise
|
||
(condition (&ambiguous-target-service-error
|
||
(service service)
|
||
(target-type target-type))
|
||
(&message
|
||
(message
|
||
(format #f
|
||
(G_ "more than one target service of type '~a'")
|
||
(service-type-name target-type))))))))))
|
||
|
||
(fold add-edge edges (service-type-extensions (service-kind service))))
|
||
|
||
(let ((edges (fold add-edges vlist-null services)))
|
||
(lambda (node)
|
||
(reverse (vhash-foldq* cons '() node edges)))))
|
||
|
||
(define (instantiate-missing-services services)
|
||
"Return SERVICES, a list, augmented with any services targeted by extensions
|
||
and missing from SERVICES. Only service types with a default value can be
|
||
instantiated; other missing services lead to a
|
||
'&missing-target-service-error'."
|
||
(define (adjust-service-list svc result instances)
|
||
(fold2 (lambda (extension result instances)
|
||
(define target-type
|
||
(service-extension-target extension))
|
||
|
||
(match (vhash-assq target-type instances)
|
||
(#f
|
||
(let ((default (service-type-default-value target-type)))
|
||
(if (eq? &no-default-value default)
|
||
(missing-target-error svc target-type)
|
||
(let ((new (service target-type)))
|
||
(values (cons new result)
|
||
(vhash-consq target-type new instances))))))
|
||
(_
|
||
(values result instances))))
|
||
result
|
||
instances
|
||
(service-type-extensions (service-kind svc))))
|
||
|
||
(let loop ((services services))
|
||
(define instances
|
||
(fold (lambda (service result)
|
||
(vhash-consq (service-kind service) service
|
||
result))
|
||
vlist-null services))
|
||
|
||
(define adjusted
|
||
(fold2 adjust-service-list
|
||
services instances
|
||
services))
|
||
|
||
;; If we instantiated services, they might in turn depend on missing
|
||
;; services. Loop until we've reached fixed point.
|
||
(if (= (length adjusted) (vlist-length instances))
|
||
adjusted
|
||
(loop adjusted))))
|
||
|
||
(define* (fold-services services
|
||
#:key (target-type system-service-type))
|
||
"Fold SERVICES by propagating their extensions down to the root of type
|
||
TARGET-TYPE; return the root service adjusted accordingly."
|
||
(define dependents
|
||
(service-back-edges services))
|
||
|
||
(define (matching-extension target)
|
||
(let ((target (service-kind target)))
|
||
(match-lambda
|
||
(($ <service-extension> type)
|
||
(eq? type target)))))
|
||
|
||
(define (apply-extension target)
|
||
(lambda (service)
|
||
(match (find (matching-extension target)
|
||
(service-type-extensions (service-kind service)))
|
||
(($ <service-extension> _ compute)
|
||
(compute (service-value service))))))
|
||
|
||
(match (filter (lambda (service)
|
||
(eq? (service-kind service) target-type))
|
||
services)
|
||
((sink)
|
||
;; Use the state monad to keep track of already-visited services in the
|
||
;; graph and to memoize their value once folded.
|
||
(run-with-state
|
||
(let loop ((sink sink))
|
||
(mlet %state-monad ((visited (current-state)))
|
||
(match (vhash-assq sink visited)
|
||
(#f
|
||
(mlet* %state-monad
|
||
((dependents (mapm %state-monad loop (dependents sink)))
|
||
(visited (current-state))
|
||
(extensions -> (map (apply-extension sink) dependents))
|
||
(extend -> (service-type-extend (service-kind sink)))
|
||
(compose -> (service-type-compose (service-kind sink)))
|
||
(params -> (service-value sink))
|
||
(service
|
||
->
|
||
;; Distinguish COMPOSE and EXTEND because PARAMS typically
|
||
;; has a different type than the elements of EXTENSIONS.
|
||
(if extend
|
||
(service (service-kind sink)
|
||
(extend params (compose extensions)))
|
||
sink)))
|
||
(mbegin %state-monad
|
||
(set-current-state (vhash-consq sink service visited))
|
||
(return service))))
|
||
((_ . service) ;SINK was already visited
|
||
(return service)))))
|
||
vlist-null))
|
||
(()
|
||
(raise
|
||
(make-compound-condition
|
||
(condition (&missing-target-service-error
|
||
(service #f)
|
||
(target-type target-type)))
|
||
(formatted-message (G_ "service of type '~a' not found")
|
||
(service-type-name target-type)))))
|
||
(x
|
||
(raise
|
||
(condition (&ambiguous-target-service-error
|
||
(service #f)
|
||
(target-type target-type))
|
||
(&message
|
||
(message
|
||
(format #f
|
||
(G_ "more than one target service of type '~a'")
|
||
(service-type-name target-type)))))))))
|
||
|
||
;;; services.scm ends here.
|