Exclude auto-generated protobuf files

[upgle]

Description

It excludes files auto-generated by the Scala Plugin for the Protocol Buffer Compiler.
I couldn't find a way to add a license header for the auto-generated file.

Those excluded protobuf files will be used for the new scheduler contribution (GRPC).

Related issue

apache/openwhisk#5070

[style95]

LGTM

[dgrove-oss]

Do the generated files need to be checked into git? Or are they artifacts produced by doing a build? If produced by the build, they should not need to be excluded from scan code. We can run the scan code on the fresh clone (before starting build).

[upgle]

@dgrove-oss
Thank you for your comment. Let me check if the code can be scanned on the fresh clone.

[dgrove-oss]

I took a look at .travis.yml. We intentionally compile the source tree "early" in the install stage from setup.sh while we defer scancode.sh to the runUnitTests.sh job. So, our choices are either exclude the generated sources as this PR does or to move the invocation of scan.sh into the install stage (which would cause it to run on all jobs in the matrix in the install stage). It would be more consistent with the other openwhisk repos to move the scan early, but either approach could be made to work.

[upgle]

Thank you for taking a closer look. I've moved the invocation of scan.sh into the install stage in this commit. apache/openwhisk@4d9c7c6

It runs on all jobs in matrices, but it doesn't take much time to do a code scanning. And I think this approach would be more suitable for handling various cases for auto-generated files.

[upgle]

Close this issue by handling it in another way.