Maxim Cournoyer e9fa17eb98 services: udev: Use a fixed location for the rules directory and config. ...

Fixes <https://issues.guix.gnu.org/47681>.

This change adjusts the location of the udev configuration file and rules
directory to a fixed location.  Since udev relies on inotify to discover
change to its rules directory (/etc/udev/rules.d), by using a fixed directory
layout, new udev rules can be automatically picked up without restarting the
service.

* gnu/services/base.scm (udev-rules-union): Build rules output directly
in #$output.
(udev-shepherd-service)[start]: Adjust the UDEV_CONFIG_FILE and
EUDEV_RULES_DIRECTORY environment variables.
[actions]: Remove field.  The 'rules' action is no longer useful.
(udev.conf): New variable.
(udev-etc): New procedure.
(udev-service-type): Extend the etc-service-type with it.

2022-02-20 19:58:14 -05:00

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