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services: mcron: Add log-file and date-format fields.

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* doc/guix.texi (Scheduled Job Execution): Document it.
* gnu/services/mcron.scm (mcron-configuration)[log-file, date-format]: New field.
(mcron-shepherd-services): Add log-file and date-format support.
Use file-append instead of string-append.

Signed-off-by: Maxim Cournoyer <maxim.cournoyer@gmail.com>
This commit is contained in:
Bruno Victal 2023-03-13 19:30:50 +00:00 committed by Maxim Cournoyer
parent edb398449f
commit c88582a674
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GPG Key ID: 1260E46482E63562
2 changed files with 32 additions and 8 deletions
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6
doc/guix.texi
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@ -19363,12 +19363,18 @@ specifications,, mcron,GNU@tie{}mcron}).
@item @code{log?} (default: @code{#t}) (type: boolean)
Log messages to standard output.
@item @code{log-file} (default: @code{"/var/log/mcron.log"}) (type: string)
Log file location.
@item @code{log-format} (default: @code{"~1@@*~a ~a: ~a~%"}) (type: string)
@code{(ice-9 format)} format string for log messages. The default value
produces messages like @samp{@var{pid} @var{name}: @var{message}}
(@pxref{Invoking mcron, Invoking,, mcron,GNU@tie{}mcron}). Each message
is also prefixed by a timestamp by GNU Shepherd.
@item @code{date-format} (type: maybe-string)
@code{(srfi srfi-19)} format string for date.
@end table
@end deftp
@c %end of fragment

34
gnu/services/mcron.scm
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@ -1,6 +1,7 @@
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2016, 2017, 2018, 2019, 2020 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2022 Maxim Cournoyer <maxim.cournoyer@gmail.com>
;;; Copyright © 2023 Bruno Victal <mirai@makinata.eu>
;;;
;;; This file is part of GNU Guix.
;;;
@ -33,7 +34,9 @@
mcron-configuration-mcron
mcron-configuration-jobs
mcron-configuration-log?
mcron-configuration-log-file
mcron-configuration-log-format
mcron-configuration-date-format
mcron-service-type))
@ -55,6 +58,8 @@
(define list-of-gexps?
(list-of gexp?))
(define-maybe/no-serialization string)
(define-configuration/no-serialization mcron-configuration
(mcron
(file-like mcron)
@ -70,12 +75,20 @@ specifications,, mcron, GNU@tie{}mcron}).")
(boolean #t)
"Log messages to standard output.")
(log-file
(string "/var/log/mcron.log")
"Log file location.")
(log-format
(string "~1@*~a ~a: ~a~%")
"@code{(ice-9 format)} format string for log messages. The default value
produces messages like @samp{@var{pid} @var{name}: @var{message}}
(@pxref{Invoking mcron, Invoking,, mcron, GNU@tie{}mcron}).
Each message is also prefixed by a timestamp by GNU Shepherd."))
Each message is also prefixed by a timestamp by GNU Shepherd.")
(date-format
maybe-string
"@code{(srfi srfi-19)} format string for date."))
(define (job-files mcron jobs)
"Return a list of file-like object for JOBS, a list of gexps."
@ -144,24 +157,29 @@ files."
(loop)))))))))
(define (mcron-shepherd-services config)
(match-record config <mcron-configuration> (mcron jobs log? log-format)
(match-record config <mcron-configuration>
(mcron jobs log? log-file log-format date-format)
(if (eq? jobs '())
'() ; nothing to do
'() ;nothing to do
(let ((files (job-files mcron jobs)))
(list (shepherd-service
(provision '(mcron))
(requirement '(user-processes))
(modules `((srfi srfi-1)
(srfi srfi-26)
(ice-9 popen) ;for the 'schedule' action
(ice-9 popen) ;for the 'schedule' action
(ice-9 rdelim)
(ice-9 match)
,@%default-modules))
(start #~(make-forkexec-constructor
(list (string-append #$mcron "/bin/mcron")
(list #$(file-append mcron "/bin/mcron")
#$@(if log?
#~("--log" "--log-format" #$log-format)
#~())
`("--log" "--log-format" ,log-format
,@(if (maybe-value-set? date-format)
(list "--date-format"
date-format)
'()))
'())
#$@files)
;; Disable auto-compilation of the job files and
@ -172,7 +190,7 @@ files."
(remove (cut string-prefix? "PATH=" <>)
(environ)))
#:log-file "/var/log/mcron.log"))
#:log-file #$log-file))
(stop #~(make-kill-destructor))
(actions
(list (shepherd-schedule-action mcron files)))))))))