Hi, so I looked at gsd-housekeeping the other day. With systemd-tempfiles, it only has two purposes these days: 1. Cleaning $XDG_CACHE_HOME/thumbnails after 30 days 2. Cleaning the trash directories after a configurable time Currently it also tries to clean /tmp and /var/tmp, but doing so is really dangerous compared to just leaving it up to systemd-tempfiles (I have filed an MR to disable the logic if we are systemd booted). Now, systemd-tempfiles can already clean up everything except for the trash. And considering that $XDG_CACHE_HOME is non-essential by definition, I think it might be sane to use systemd-tempfiles not only to clean the thumbnails but the entirety of $XDG_CACHE_HOME in the future. So I am thinking that we could do the following: 1. Specify that we use the systemd tmpfiles.d configuration format for cleaning $XDG_CACHE_HOME. Also specify that $XDG_CACHE_HOME will be cleaned automatically after e.g. 30 days unless otherwise configured by an application. 2. Add some reference to this to the thumbnail specification. 3. Tell application maintainers that they need to ship a configuration if they want to keep files longer (likely candidates are e.g. email clients). 4. As a start, add a "xdg-thumbnails.conf" systemd-tempfiles configuration to systemd that cleans $XDG_CACHE_HOME/thumbnails after 30 days. 5. After a grace period, add "xdg-cache.conf" to clean $XDG_CACHE_HOME and remove "xdg-thumbnails.conf" again (similar to how /usr/lib/tmpfiles.d/tmp.conf does it for /var/tmp and /tmp) Is it reasonable to standardise on the systemd tmpfiles.d format? Is it OK to clean $XDG_CACHE_HOME after a fixed time period by default? Other thoughts? Benjamin
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