* [swift] Add bazel configuration for Swift
This change adds a simple bazel BUILD file for consuming the Swift
support. This also bumps the platforms bazel repo to fix support for M1s
and bazel 5.1+ https://github.com/bazelbuild/bazel/issues/15099#issuecomment-1075368289
The rules_swift inclusion here must happen before gRPC to ensure we
don't pull in an older version.
* Add CC=clang which is a requirement for Swift on Linux
* Add Swift to PATH
* Remove ubuntu1604 from presubmit.yml
Ubuntu 16.04 is end-of-life, we're going to remove it from Bazel CI.
If you like you can add testing on `ubuntu2004` platform which we also support.
* Add ubuntu2004 to presubmit.yml
* Stop building for Windows until the build passes
ERROR: D:/b/bk-windows-java8-bd0z/bazel/flatbuffers/BUILD:123:1: Couldn't build file _objs/flatbuffers_test/test.obj: undeclared inclusion(s) in rule '//:flatbuffers_test':
this rule is missing dependency declarations for the following files included by 'tests/test.cpp':
'tests/monster_test_generated.h'
'tests/monster_extra_generated.h'
The files in tests are being found instead of the generated files since
Windows doesn't have any sandboxing. For now, let's disable the rules
and come back to it.
* Fix buildifier warnings
Clean up docstrings and add a module docstring.
Keith Smiley