* Prevent extra snapshot when using new run
* Add unit tests for initializing snapshotter
There should be no snapshot for RunV2. Added a test for SingleSnapshot
as well to prove that the test actually works (rather than `initialized`
just not being read or set properly).
Ensure zstd compression only gets applied to oci images.
When adding a layer to an image ensure that they are compatable if not convert them.
Create function to convert mediatypes between oci and docker types.
* Removed block on use --cache-copy-layers with multistage builds
* Removed using digest in composite key with command COPY --from
* COPY --from command uses src as file context (only changed files will be reason for change hash)
* ARG and ENV changed before COPY dont change composite key
* Add and fix some tests
* Caching work same as caching in docker buildx
Co-authored-by: Sergei Kraev <skraev@tradingview.com>
Asher
Manish Giri
Logan Price
Kraev Sergei
Tejal Desai
Tejal Desai
Cole Wippern