bug#63082: [PATCH 15/17] services: mpd: Provision a default cache directory and set HOME.

[Bruno Victal]

On 2023-04-28 15:27, Maxim Cournoyer wrote:
> Relates to <https://issues.guix.gnu.org/63082>.
> 
> * gnu/services/audio.scm (mpd-shepherd-service): Create a default .cache
> directory.  Use mkdir-p/perms and refactor loop.  Set the HOME environment
> variables.

There's a slight problem here, you might really not want db_file to be set _at 
all_.
Case in point, I use a database-plugin instead which would be incongruent if 
db_file is forcibly serialized into the config.

Perhaps we could add some kind of warning mechanism that alerts the user that 
either db_file or database-plugin must be configured?