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authorLudovic Courtès <ludo@gnu.org>2018-01-21 00:05:09 +0100
committerLudovic Courtès <ludo@gnu.org>2018-01-21 00:24:03 +0100
commitd466b1fc8221a6224fe7ded53a828f9c29ed9457 (patch)
tree5180831a10c380d7eca1e8c0abc5b09d49a3a38c /tests/services.scm
parentbc58201ec22aeb07b61dc1e482d6a57868436eef (diff)
services: Missing services are automatically instantiated.
This simplifies OS configuration: users no longer need to be aware of what a given service depends on. See the discussion at <https://lists.gnu.org/archive/html/guix-devel/2018-01/msg00114.html>. * gnu/services.scm (missing-target-error): New procedure. (service-back-edges): Use it. (instantiate-missing-services): New procedure. * gnu/system.scm (operating-system-services): Call 'instantiate-missing-services'. * tests/services.scm ("instantiate-missing-services") ("instantiate-missing-services, no default value"): New tests. * gnu/services/version-control.scm (cgit-service-type)[extensions]: Add FCGIWRAP-SERVICE-TYPE. * gnu/tests/version-control.scm (%cgit-os): Remove NGINX-SERVICE-TYPE and FCGIWRAP-SERVICE-TYPE instances. * doc/guix.texi (Log Rotation): Remove 'mcron-service-type' in example. (Miscellaneous Services): Remove 'nginx-service-type' and 'fcgiwrap-service-type' in Cgit example.
Diffstat (limited to 'tests/services.scm')
-rw-r--r--tests/services.scm32
1 files changed, 31 insertions, 1 deletions
diff --git a/tests/services.scm b/tests/services.scm
index ca32b565c4..b146a0dec2 100644
--- a/tests/services.scm
+++ b/tests/services.scm
@@ -1,5 +1,5 @@
;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2015, 2016, 2017 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2015, 2016, 2017, 2018 Ludovic Courtès <ludo@gnu.org>
;;;
;;; This file is part of GNU Guix.
;;;
@@ -122,6 +122,36 @@
(fold-services (list s) #:target-type t1)
#f)))
+(test-assert "instantiate-missing-services"
+ (let* ((t1 (service-type (name 't1) (extensions '())
+ (default-value 'dflt)
+ (compose concatenate)
+ (extend cons)))
+ (t2 (service-type (name 't2)
+ (extensions
+ (list (service-extension t1 list)))))
+ (s1 (service t1 'hey!))
+ (s2 (service t2 42)))
+ (and (lset= equal?
+ (list (service t1) s2)
+ (instantiate-missing-services (list s2)))
+ (equal? (list s1 s2)
+ (instantiate-missing-services (list s1 s2))))))
+
+(test-assert "instantiate-missing-services, no default value"
+ (let* ((t1 (service-type (name 't1) (extensions '())))
+ (t2 (service-type (name 't2)
+ (extensions
+ (list (service-extension t1 list)))))
+ (s (service t2 42)))
+ (guard (c ((missing-target-service-error? c)
+ (and (eq? (missing-target-service-error-target-type c)
+ t1)
+ (eq? (missing-target-service-error-service c)
+ s))))
+ (instantiate-missing-services (list s))
+ #f)))
+
(test-assert "shepherd-service-lookup-procedure"
(let* ((s1 (shepherd-service (provision '(s1 s1b)) (start #f)))
(s2 (shepherd-service (provision '(s2 s2b)) (start #f)))