earthly/earthly v0.6.29 on GitHub

Cache mounts sharing mode can now be specified via RUN --mount type=cache,sharing=shared via CACHE --sharing=shared. Allowed values are locked (default - lock concurrent acccess to the cache), shared (allow concurrent access) and private (create a new empty cache on concurrent access).

Increases the cache limit for local and git sources from 10% to 50% to support copying large files (e.g. binary assets).
The default cache mount sharing mode is now locked instead of shared. This means that if you have multiple builds running concurrently, they will block on each other to gain access to the cache mount. If you want to share the cache as it was shared in previous version of Earthly, you can use RUN --mount type=cache,sharing=shared or CACHE --sharing=shared.

CACHE command was not being correctly used in IF, FOR, ARG and other commands. #2330
Fixed buildkit gckeepstorage config value which was was set to 1000 times larger than the cache size, now it is set to the cache size.
Fixed Earthly not detecting the correct image digest for some images loaded in WITH DOCKER --load and causing cache not to be bust correctly. #2337 and #2288