Use a path outside of /tmp for the cache if available

[dmarti]

On some systems, /tmp is a small tmpfs partition. This creates 2 problems for putting Earthly's cache there:

• not enough space available for large builds

• contents are lost on reboot

Consider checking for the /var/cache directory and putting Eartlhy's cache there if it is available.

related issue: Explore remote cache · Issue #11 · earthly/earthly

reference: Features/tmp-on-tmpfs - Fedora Project Wiki

[vladaionescu]

Good points.

A temporary workaround is to create a symbolic link from /tmp/earthly to some other location on the system.

[dmarti]

Yes, that's how I have it working, thank you.

[alexcb]

@dmarti the next release of earthly will allow this to be changed by creating a file under ~/.earthly/config.yaml containing:

global:
  cache_path: "/path/to/earthly/cache"

We also changed it to default to /var/cache/earthly as you suggested. Thanks for reporting the issue.