buildgen: Template renderer for our build system. distrib: Scripts to distribute language-specific packages and other distribution-related helper scripts. dockerfile: Docker files to test gRPC. doxygen: gRPC C/C++ documentation generation via Doxygen. gce: Scripts to help setup testing infrastructure on GCE. gcp: Helper scripts for interacting with various services on GCP (like Google container engine, BigQuery etc) jenkins: Support for running tests on Jenkins. run_tests: Scripts to run gRPC tests in parallel.