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Add instructions to configure Bazel for Python 2 #3738

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Aug 6, 2019
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Add instructions to configure Bazel for Python 2 #3738

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22 changes: 13 additions & 9 deletions contributors/devel/sig-testing/bazel.md
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Expand Up @@ -2,22 +2,20 @@

Building and testing Kubernetes with Bazel is supported but not yet default.

Bazel is used to run all Kubernetes PRs on [Prow](https://prow.k8s.io),
Bazel is used to run all Kubernetes PRs on [Prow],
as remote caching enables significantly reduced build and test times.

Some repositories (such as kubernetes/test-infra) have switched to using Bazel
exclusively for all build, test, and release workflows.

Go rules are managed by the [`gazelle`](https://github.com/bazelbuild/rules_go/tree/master/go/tools/gazelle)
tool, with some additional rules managed by the [`kazel`](https://git.k8s.io/repo-infra/kazel) tool.
Go rules are managed by the [`gazelle`][gazelle]
tool, with some additional rules managed by the [`kazel`][kazel] tool.
These tools are called via the `hack/update-bazel.sh` script.

Instructions for installing Bazel
can be found [here](https://www.bazel.io/versions/master/docs/install.html).
Please note that until [this Bazel
issue](https://github.com/bazelbuild/rules_docker/issues/454) is fixed,
`/usr/bin/env python` must be python2 in order for all the Bazel commands listed
below to succeed.
Instructions for installing Bazel can be found [here][bazel-install].
Note that older Bazel versions did not work with Python 3, so we recommend
using version 0.27.0 or newer. If you still have Python-related problems,
please take a look at [this FAQ][bazel-python-faq].

Several convenience `make` rules have been created for common operations:

Expand All @@ -37,6 +35,12 @@ tests, run
$ bazel test //pkg/kubectl/...
```

[Prow]: https://prow.k8s.io
[bazel-install]: https://www.bazel.io/versions/master/docs/install.html
[kazel]: https://git.k8s.io/repo-infra/kazel
[gazelle]: https://github.com/bazelbuild/rules_go/tree/master/go/tools/gazelle
[bazel-python-faq]: https://github.com/bazelbuild/bazel/issues/7899

## Planter
If you don't want to install Bazel, you can instead try using the unofficial
[Planter](https://git.k8s.io/test-infra/planter) tool,
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