Sharing uv cache in devcontainer creates broken links outside it

[tpoliaw]

uv creates links within the cache. When the cache is mounted in the container and something is updated, this creates symlinks that are not valid when the cache is used outside the devcontainer.

eg

$ find ~/.cache/uv -name 'docopt*' -type l
/home/qan22331/.cache/uv/sdists-v9/pypi/docopt/0.6.2/92J2M2352JQhVMGn-dNNa/docopt-0.6.2-py2.py3-none-any
$ readlink /home/qan22331/.cache/uv/sdists-v9/pypi/docopt/0.6.2/92J2M2352JQhVMGn-dNNa/docopt-0.6.2-py2.py3-none-any
/root/.cache/uv/archive-v0/l_SqQrH84bcUPQM1G3L5Q

where the /root/.cache/ directory refers to the cache location in the container.

[coretl]

Are we better off will a cross-container volume mount instead then?

[coretl]

I think if we modify so:

python-copier-template/.devcontainer/devcontainer.json

Lines 57 to 62 in ae18808

	// Keep a persistent cross container cache for uv
	{
	"source": "${localEnv:HOME}/.cache/uv",
	"target": "/root/.cache/uv",
	"type": "bind"
	},

becomes:

 { 
     "source": "persistent-uv-cache", 
     "target": "/root/.cache/uv", 
     "type": "volume" 
 }, 

Then we get the desired effect.

[tpoliaw]

Does that re-use it for all containers?

[coretl]

Yes

[coretl]

Fixed by #307