Allow 2 users of the same group to share a temp cache.

[sminnee]

Right now, the default configuration is that the manifest cache is stored in a user-specific, php-version-specific folder.

It should also be possible to configure this to be a folder specific to a system group, with the files set as group-writeable rather than user-writeable. The system should probably detect whether a given user is a member of this group, and only use this location for such users. Alternatively, the configuration can also specify a whitelist of configuration.

Presumably this will need to be configured in _ss_environment.php since the yaml config relies on the cache being available.

[robbieaverill]

One problem is that in TempPath.php getTempParentFolder() it's using sys_get_tmp_dir() to get the base path to the cache storage location, which differs between CLI and web server. This would need to be rewritten in a way that is the same for both before this change would be useful, otherwise you're still getting two separate cache storage locations.

One option (more "radical") would be to do away with the temporary storage location and only use a local folder path. We could create a temporary folder that could potentially house things like cache files, log files etc and call it "var" or something.

[maxime-rainville]

Just had a look at my local sandbox and it looks like this is still a problem in SS4.

[sminnee]

This is a stale enhancement ticket imo; closing.

It could arguably be used to simply Linux user management (you don't need to run dev/build as www-data) but we've set up the status quo deployment chains for so long now I can't see much value in keeping this open