* update win RBE docker image and toolchain
and switch win RBE builds to using it.
* delete legacy RBE windows toolchain config
* switching to VS2019 makes #28544 obsolete
* [xDS Proto] Enhence gRPC buildgen for 3rd party proto compilation
* Rebase from master to update envoy-api version
* Address reviewer's comments
* Address reviewer's comment
* Regenerate project
* Rename external_library
* Address reviewer's comments
* Add comments for the internals of generate C++ proto code
* Add proto file as a dependency to the custom command
* Initial GCF distribtest
* Tenatively hook up to CI
* Try again
* Allow dev0 artifacts
* Fix invocation path
* Update gcloud
* Add a 3.8 artifact for presubmits
* And 3.9 too
* Put test files back to normal
* Formatting/linting
* Copyright
* That copyright script doesn't work with shebangs
* Review comments
* Try to create latest-manylinux label
* Accidentally a letter
* Add Python 3.7 manylinux 2014 to presubmit
* Revert CI config file used for test
* Review comments
* Yapf
* Re-add presubmit wheel
* Review comments
* Add bazel cpp distribtest for grpc_cc_library
* Add new directory to bazelignore
* Try changing to workspace differently
* Debug cd
* Fix bazel wrapper
* Yet more debug
* Try again
* Clean up
* Sanity fixes
* Run per-language distribtests even if overall build fails
* Support musllinux binary wheels
* Skip aarach64 for now
* Consolidate the difference of mktemp
* Extend linux artifact building time && install bash for distribtest
* Stop using grpc.tools, use grpc_tools
* Update the README to use grpc_tools
* Force static link libc++ for alpine binaries
* Rebase recent build script changes
* Install ccache for musllinux distribtest images
* Revert timeout change to grpc_build_artifacts
* Make repo globally buildable
* Add initial distrib test script
* Add test script
* Support multiple versions
* Split out a separate latest version test
* Integrate with kokoro
* make tools/bazel version overridable
* added simplified test_single_bazel_version.sh
* cleanup .bazelignore
* only test 3.x and 4.x
* always test all the bazel versions
* revert unnecessary changes
* revert unnecessary changes
* fix shellcheck error
Co-authored-by: Richard Belleville <rbellevi@google.com>
* Remove Python 2.7 binary wheels
* Make sure pip won't pick-up newer versions
* Attempt to fix the distribtest
* Fallback to virtualenv==16.7.9 for 34 and 35
* Remove 34 from binary wheel distribtests