EngFlow public examples

This repository contains examples in various languages that demonstrate how to build and test software with the EngFlow Remote Execution service.

Prerequisites

• //python: Bazel needs to install the dependencies listed in python/requirements.txt. To make this repository work across platforms, we do not check in a lock file. Execute the following commands to generate the lock file before building and testing:

  # https://stackoverflow.com/a/73720550
  git update-index --skip-worktree python/requirements_lock.txt
  bazel run //python:requirements.update

• //swift: Requires the clang compiler. Make sure the binary is in your PATH.

  //swift also does not yet build remotely on platforms other than macOS, due to lack of support in rules_swift.

  The implementation of swift_autoconfiguration as of v1.18.0 does not yet use the Bazel toolchain API. Instead, it selects the platform based on the os.name Java system property, and on Linux, expects swiftc to exist on the system already:

  • repository_ctx.os
  • repository_os.name
  • _create_linux_toolchain() checks for swiftc

  Other language rule sets contain logic to download the appropriate language SDK on demand.

  The following issues track the eventual addition of toolchain support and automatic SDK downloads on Linux (both opened 2018-06-06):

  • bazelbuild/rules_swift: Migrate to platforms/toolchains API #3
  • bazelbuild/rules_swift: Auto-download Linux toolchains when possible #4

Local execution

Make sure that you can build and run the tests in the language of your choice locally before attempting remote execution.

Building locally

• cpp, csharp, docker, genrules, go, java, kotlin, perl, python, scala, and typescript:

  bazel build //${DIRECTORY}/...

  Build them all with:

  bazel build //...

• swift:

  # --config=clang isn't required on macOS
  bazel build --config=clang //swift:tests

Testing locally

• java, python, scala, and typescript:

  bazel test //${DIRECTORY}/...

  Test them all with:

  bazel test //...

• swift:

  # --config=clang isn't required on macOS
  bazel test --config=clang //swift:tests

Remote execution

Make sure to include --remote_executor and --bes_backend, in the engflow configuration of your .bazelrc.user file, as well as access credentials if needed. For instance:

# Incorporate configurations from .bazelrc, which imports this file.
#
# - Depending on your cluster configuration, replace remote_linux_64 with
#   remote_macos_x64 or remote_windows_x64.
build:engflow --config=engflow_common
build:engflow --config=remote_linux_x64

# Configuration for your trial cluster
build:engflow --remote_executor=grpcs://${CLUSTER_ENDPOINT}/
build:engflow --bes_backend=grpcs://${CLUSTER_ENDPOINT}/
build:engflow --bes_results_url=https://${CLUSTER_ENDPOINT}/invocation/
build:engflow --nogoogle_default_credentials
build:engflow --bes_lifecycle_events

# Configuration for your mTLS certificates (if required); otherwise ignore
# these lines and use the auth helper configuration below.
build:engflow --tls_client_certificate=/path/to/credentials/cert.crt
build:engflow --tls_client_key=/path/to/credentials/cert.key

# Configuration for your EngFlow auth helper (if required); otherwise ignore
# this line and use the mTLS configuration above.
build:engflow --credential_helper=${CLUSTER_ENDPOINT}=/path/to/engflow_auth

# This ensures _all_ build and test runs will be remote. Comment this out
# when building locally.
build --config=engflow

Building on remote

Add --config=engflow to the following commands if build --config=engflow isn't enabled in your .bazelrc.user file.

• cpp, csharp, docker, genrules, go, java, kotlin, perl, python, scala, or typescript:

  bazel build //${DIRECTORY}/...

  Build them all with:

  bazel build //...

• swift:

  bazel build //swift:tests

Testing on remote

• java, python, scala, and typescript:

  bazel test //${DIRECTORY}/...

  Test them all with:

  bazel test //...

• swift:

  bazel test //swift:tests

engflowapis execution

A detailed example of EngFlow APIs consumption is presented in java/com/engflow/notificationqueue.