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05/06: services: Add 'lookup-service-types'.
From: |
Ludovic Courtès |
Subject: |
05/06: services: Add 'lookup-service-types'. |
Date: |
Wed, 8 Nov 2017 16:39:20 -0500 (EST) |
civodul pushed a commit to branch master
in repository guix.
commit 49483f71381ad32cdbe81b1c8ed2cc023329cc18
Author: Ludovic Courtès <address@hidden>
Date: Wed Nov 8 13:26:08 2017 +0100
services: Add 'lookup-service-types'.
* gnu/services.scm (lookup-service-types): New procedure.
* tests/services.scm ("lookup-service-types"): New test.
---
gnu/services.scm | 11 +++++++++++
tests/services.scm | 10 +++++++++-
2 files changed, 20 insertions(+), 1 deletion(-)
diff --git a/gnu/services.scm b/gnu/services.scm
index df1bede..016ff08 100644
--- a/gnu/services.scm
+++ b/gnu/services.scm
@@ -55,6 +55,7 @@
%service-type-path
fold-service-types
+ lookup-service-types
service
service?
@@ -192,6 +193,16 @@ is used as the initial value of 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)
diff --git a/tests/services.scm b/tests/services.scm
index 8484ee9..ca32b56 100644
--- a/tests/services.scm
+++ b/tests/services.scm
@@ -23,7 +23,8 @@
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-26)
#:use-module (srfi srfi-34)
- #:use-module (srfi srfi-64))
+ #:use-module (srfi srfi-64)
+ #:use-module (ice-9 match))
(define live-service
(@@ (gnu services herd) live-service))
@@ -206,4 +207,11 @@
(list (map live-service-provision unload)
(map shepherd-service-provision load)))))
+(test-eq "lookup-service-types"
+ system-service-type
+ (and (null? (lookup-service-types 'does-not-exist-at-all))
+ (match (lookup-service-types 'system)
+ ((one) one)
+ (x x))))
+
(test-end)
- branch master updated (0af94ad -> c5a4a92), Ludovic Courtès, 2017/11/08
- 02/06: ui: Define and honor '&error-location' and '&fix-hint' conditions., Ludovic Courtès, 2017/11/08
- 03/06: services: 'fold-service-types' honors its seed., Ludovic Courtès, 2017/11/08
- 04/06: services: 'fold-service-types' includes (gnu services)., Ludovic Courtès, 2017/11/08
- 05/06: services: Add 'lookup-service-types'.,
Ludovic Courtès <=
- 06/06: gnu: Improve error reporting of the use-.*modules macros., Ludovic Courtès, 2017/11/08
- 01/06: ui: Introduce (guix i18n)., Ludovic Courtès, 2017/11/08