Add CI configuration to run tests with Python 3 interpreter

[duggelz]

Fixes #3872

[bazel-io]

Can one of the admins verify this patch?

[duggelz]

@damienmg @mattmoor How do I poke the CI system to test this?

[mattmoor]

test this please

[mattmoor]

I guess I lack the magic powers on this repo.

[damienmg]

@duggelz : you need to make the google org public on your github account to have the right to trigger a build. And then "test this please" is the magic sentence (it also auto build at each new push if the pr comes from you).

[duggelz]

Huh, I had no idea they were private. Fixed. I wonder how much past confusion this has caused :(

test this please

[duggelz]

test this please

Fiddling with permissions, currently getting this error:

Caused by: com.google.api.client.http.HttpResponseException: 400 Bad Request
{
  "error" : "invalid_grant",
  "error_description" : "Invalid JWT Signature."
}
	at com.google.api.client.http.HttpRequest.execute(HttpRequest.java:1070)
	at com.google.auth.oauth2.ServiceAccountCredentials.refreshAccessToken(ServiceAccountCredentials.java:317)

[damienmg]

Were do you get that error from?

[duggelz]

Permission error is gone, now I'm seeing the Python 3 errors I expect to see:

http://ci.bazel.io/blue/rest/organizations/jenkins/pipelines/PR/pipelines/bazel-tests/runs/121/nodes/26/log/?start=0

Along with a FreeBSD error that seems completely unrelated:

http://ci.bazel.io/blue/rest/organizations/jenkins/pipelines/PR/pipelines/bazel-tests/runs/121/nodes/28/log/?start=0

Could you look at the config and Jenkins output and confirm that I am indeed running the tests under both Python 2 and Python 3? I.e. once without --python_path and once with --python_path? Because I look at the pretty graphic and I only see one node=linux-x86_64 under "Run Configurations", but I would sort of expect to see two.

[damienmg]

Added comment for fixing the only one configuration issue.

[damienmg]

add "python_version": "3"

[duggelz]

Added

[damienmg]

add "python_version": "2"

[duggelz]

Added

[damienmg]

I recommend removing the non-linux configuration so you get a less noisy result. E.g. freebsd is a breakage at HEAD.

[duggelz]

Done

[duggelz]

Can we submit this with failing tests, or do we have to fix all the Python 3 breakages first, then submit this?

[duggelz]

I'm not sure what indentation it wants here.

[duggelz]

test this please

(For Bazel CI system)

[duggelz]

Tests now pass, except for the FreeBSD node which is unrelatedly broken at HEAD, from what I can tell.