build --output=type=none
nicks opened this issue · comments
Description
Repro steps:
- Create a docker-container builder
- Run
docker buildx build .
Current behavior:
I get a warning:
WARNING: No output specified with docker-container driver. Build result will only remain in the build cache. To push result image into registry use --push or to load image into docker use --load
Desired behavior:
It'd be nice if we had a flag that explicitly requested this behavior, e.g. --output=type=none, and did not emit any warning
Additional info
Most of my CI pipelines have a dry-run flag where i want --output=type=none on pull-request, but --output=type=image,push=true on push.
This also would make my bakefile a bit more explicit, because sometimes i want to override a --output=type=image with no output, and right now the syntax is kind of inscrutable.
It's called type=cacheonly https://docs.docker.com/build/exporters/#cache-only-export
Ok to close @nicks?