services: dicod: Allow the configuration of "handlers".

* gnu/services/dict.scm (<dicod-configuration>)[handlers]: New field.
(<dicod-handler>): New record type.
(<dicod-database>): Add fields.
(dicod-configuration-file): Support convert handlers and enhanced databases.
configuration to config file.
* doc/guix.texi (Miscellaneous Services): Update accordingly.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

1 files changed, 47 insertions, 5 deletions

diff --git a/doc/guix.texi b/doc/guix.texi
index 57595b95e7..ae5f04b70f 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -14370,25 +14370,49 @@ This is the list of IP addresses and ports and possibly socket file
 names to listen to (@pxref{Server Settings, @code{listen} directive,,
 dico, GNU Dico Manual}).
 
+@item @code{handlers} (default: @var{'()})
+List of @code{<dicod-handler>} objects denoting handlers (module instances).
+
 @item @code{databases} (default: @var{(list %dicod-database:gcide)})
 List of @code{<dicod-database>} objects denoting dictionaries to be served.
 @end table
 @end deftp
 
-@deftp {Data Type} dicod-database
-Data type representing a dictionary database.
+@deftp {Data Type} dicod-handler
+Data type representing a dictionary handler (module instance).
 
 @table @asis
 @item @code{name}
-Name of the database, will be used in DICT commands.
+Name of the handler (module instance).
 
-@item @code{module}
-Name of the dicod module used by this database
+@item @code{module} (default: @var{#f})
+Name of the dicod module of the handler (instance).  If it is @code{#f},
+the module has the same name as the handler.
 (@pxref{Modules,,, dico, GNU Dico Manual}).
 
 @item @code{options}
 List of strings or gexps representing the arguments for the module handler
+@end table
+@end deftp
+
+@deftp {Data Type} dicod-database
+Data type representing a dictionary database.
+
+@table @asis
+@item @code{name}
+Name of the database, will be used in DICT commands.
+
+@item @code{handler}
+Name of the dicod handler (module instance) used by this database
 (@pxref{Handlers,,, dico, GNU Dico Manual}).
+
+@item @code{complex?} (default: @var{#f})
+Whether the database configuration complex.  The complex configuration
+will need a corresponding @code{<dicod-handler>} object, otherwise not.
+
+@item @code{options}
+List of strings or gexps representing the arguments for the database
+(@pxref{Databases,,, dico, GNU Dico Manual}).
 @end table
 @end deftp
 
@@ -14397,6 +14421,24 @@ A @code{<dicod-database>} object serving the GNU Collaborative International
 Dictonary of English using the @code{gcide} package.
 @end defvr
 
+The following is an example @code{dicod-service} configuration.
+
+@example
+(dicod-service #:config
+  (dicod-configuration
+   (handlers (list (dicod-handler
+                    (name "wordnet")
+                    (module "dictorg")
+                    (options
+                     (list #~(string-append "dbdir=" #$wordnet))))))
+   (databases (list (dicod-database
+                     (name "wordnet")
+                     (complex? #t)
+                     (handler "wordnet")
+                     (options '("database=wn")))
+                    %dicod-database:gcide))))
+@end example
+
 @subsubsection Version Control
 
 The @code{(gnu services version-control)} module provides the following services: