Set up presubmit tests

[ahumesky]

At minimum they should build the example app (https://github.com/bazelbuild/rules_android_ndk/tree/main/examples/basic) and ideally the resulting apk would be tested on an emulator / virtual device.

See also
#7
bazelbuild/continuous-integration#1425

This might be useful as inspiration too:
https://github.com/DanAlbert/ndk-app-template/blob/main/.github/workflows/build.yml

[keith]

The terraform changes in bazelbuild/continuous-integration#1425 should solve this, it will create a pipeline for this, someone will have to hook up webhooks though

[meteorcloudy]

I have set up the webhook, the presubmit is available for PRs now, see #13 and https://buildkite.com/bazel/rules-android-ndk/builds/2

But there are some failures, it looks like you are trying to put a BUILD file in the Android SDK installation directory? On Bazel CI, that directory is mounted in the docker container from the host VM, so it's not writable. Is there a way to avoid doing that?

See https://github.com/bazelbuild/continuous-integration/blob/d0accaf7a76e9f4f58f4773dcccb5233882e9b97/buildkite/terraform/bazel/pipeline.yml.tpl#L32

[ahumesky]

That the rule is incidentally creating build files in the real NDK directory is a known issue: #3

I'll work on solving that next

[ahumesky]

Looks like we'll also need to update the version of the NDK on CI:
#13 (comment)

[ahumesky]

Presubmit should now work for linux:
#14 (comment)

It may take some time for mac to be set up

Some commits in the course of setting this up:
40e17b3
9caf964
254cb3b
2a3c13b

[keith]

I think we're all good here

[ahumesky]

it would be good to also run the apk that's built on an emulator, to make sure the artifact actually works, something like what's done here:
https://github.com/DanAlbert/ndk-app-template/blob/f1558c77f4ac563ccfc1dbd41222d4616900b5ba/.github/workflows/build.yml#L63

but that can be its own issue

[ahumesky]

#23