Flag --incompatible_disable_starlark_host_transitions will break Cloud Robotics Core in Bazel 7.0

[keertk]

Incompatible flag --incompatible_disable_starlark_host_transitions will be enabled by default in the next major release (Bazel 7.0), thus breaking Cloud Robotics Core. Please migrate to fix this and unblock the flip of this flag.

The flag is documented here: bazelbuild/bazel#17032.

Please check the following CI builds for build and test results:

• Ubuntu 18.04 OpenJDK 11

Never heard of incompatible flags before? We have documentation that explains everything.
If you have any questions, please file an issue in https://github.com/bazelbuild/continuous-integration.

[sgowroji]

Hi @ensonic, Could you please look into this issue and share any significant update. Thanks!

[ensonic]

We're trying to port from rules_docker to rules_oci (see #130), but have trouble finding a good replacement for:

load("@io_bazel_rules_docker//container:providers.bzl", "ImageInfo", "ImportInfo")

see https://github.com/googlecloudrobotics/core/blob/main/bazel/app_chart.bzl#L1

WIP PR: #163

Any ideas?

[drigz]

I had a look at rules_oci and found that it reads the digest from a file index.json: https://github.com/bazel-contrib/rules_oci/blob/d79412e7aadbb835f8e15819c6f67323d430430d/oci/private/push.sh.tpl#L40

Is that file generated for the images in #163? Can we adapt our rules to read the digest from index.json?

[ensonic]

The only pending migration:

Migration is needed for the following flags:
--
  | --incompatible_disable_starlark_host_transitions