toolchain: allow to configure build_tar target #1937
Merged
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
python/cpython#18080 hasn't been back-ported to python3.8, which happens to be the default interpreter version in a lot of popular base docker images. This change in python's tarfile implementation affects the behavior of https://github.com/bazelbuild/rules_docker/blob/bdea23404dd256c7ae2f8e02d346428044cc7d91/container/archive.py#L144 used by a popular container_image rule. This means that images built by bazel in environments with different python3 versions will result in different image digests. Until the hermeticity of python toolchains is guaranteed, it may be useful to have a workaround for users who can provide their own build_tar tool, akin to https://github.com/kubernetes/repo-infra/blob/72a6f5d05659f7d255b51f152e0725adfe970718/tools/build_tar/buildtar.go
|
Thanks for your pull request. It looks like this may be your first contribution to a Google open source project (if not, look below for help). Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA). 📝 Please visit https://cla.developers.google.com/ to sign. Once you've signed (or fixed any issues), please reply here with What to do if you already signed the CLAIndividual signers
Corporate signers
ℹ️ Googlers: Go here for more info. |
|
@googlebot I signed it! |
dataoleg
requested review from
alexeagle,
gravypod,
pcj and
smukherj1
as code owners
pcj
approved these changes
Dec 6, 2021
gravypod
approved these changes
Dec 6, 2021
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
PR Checklist
Please check if your PR fulfills the following requirements:
PR Type
What kind of change does this PR introduce?
What is the current behavior?
Current behavior of
build_tartool used bycontainer_layeris not hermetic, because it implicitly depends on the python toolchain, and as demonstrated by #1680, this can lead to non-reproducible builds.What is the new behavior?
Similar to #1881, this PR adds an optional attribute for toolchain configuration, allowing to pass a hermetic
build_tar_targetexecutable.Does this PR introduce a breaking change?