02/04: services: rottlog: Make extensible.

[Ludovic Courtès]

civodul pushed a commit to branch master
in repository guix.

commit 254ea3f945e8bc44f8c3a4159302f24f4fe5f216
Author: Ludovic Courtès <address@hidden>
Date:   Thu Jun 8 20:23:08 2017 +0200

    services: rottlog: Make extensible.
    
    * gnu/services/admin.scm (rottlog-service-type)[compose, extend]: New
    fields.
    * doc/guix.texi (Log Rotation): Mention extension.
---
 doc/guix.texi          | 3 +++
 gnu/services/admin.scm | 6 ++++++
 2 files changed, 9 insertions(+)

diff --git a/doc/guix.texi b/doc/guix.texi
index b8675bd..ffd2028 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -9561,6 +9561,9 @@ with the default settings, for commonly encountered log 
files.
 This is the type of the Rottlog service, whose value is a
 @code{rottlog-configuration} object.
 
+Other services can extend this one with new @code{log-rotation} objects
+(see below), thereby augmenting the set of files to be rotated.
+
 This service type can define mcron jobs (@pxref{Scheduled Job
 Execution}) to run the rottlog service.
 @end defvr
diff --git a/gnu/services/admin.scm b/gnu/services/admin.scm
index 99f3b1d..b9e3fa7 100644
--- a/gnu/services/admin.scm
+++ b/gnu/services/admin.scm
@@ -164,6 +164,12 @@ for ROTATION."
                      ;; the documentation.
                      (service-extension profile-service-type
                                         (compose list rottlog-rottlog))))
+   (compose concatenate)
+   (extend (lambda (config rotations)
+             (rottlog-configuration
+              (inherit config)
+              (rotations (append (rottlog-rotations config)
+                                 rotations)))))
    (default-value (rottlog-configuration))))
 
 ;;; admin.scm ends here