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README.md

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Bazel Buildfarm

This repository hosts the Bazel remote caching and execution system.

Background information on the status of caching and remote execution in bazel can be found in the bazel documentation.

File issues here for bugs or feature requests, and ask questions via build team slack in the #buildfarm channel.

Buildfarm Wiki

Usage

All commandline options override corresponding config settings.

Bazel Buildfarm Server

Run via

bazel run //src/main/java/build/buildfarm:buildfarm-server <configfile> [<-p|--port> PORT]

Bazel Buildfarm Worker

Run via

bazel run //src/main/java/build/buildfarm:buildfarm-operationqueue-worker <configfile> [--root ROOT] [--cas_cache_directory CAS_CACHE_DIRECTORY]

Bazel Client

To use the example configured buildfarm with bazel (version 1.0 or higher), you can configure your .bazelrc as follows:

$ cat .bazelrc
build --remote_executor=grpc://localhost:8980

Then run your build as you would normally do.

Debugging

Buildfarm uses Java's Logging framework and outputs all routine behavior to the NICE Level.

You can use typical Java logging configuration to filter these results and observe the flow of executions through your running services. An example logging.properties file has been provided at examples/debug.logging.properties for use as follows:

bazel run //src/main/java/build/buildfarm:buildfarm-server -- --jvm_flag=-Djava.util.logging.config.file=$PWD/examples/debug.logging.properties $PWD/examples/server.config.example

and

bazel run //src/main/java/build/buildfarm:buildfarm-operationqueue-worker -- --jvm_flag=-Djava.util.logging.config.file=$PWD/examples/debug.logging.properties $PWD/examples/worker.config.example

To attach a remote debugger, run the executable with the --debug=<PORT> flag. For example:

bazel run //src/main/java/build/buildfarm:buildfarm-server -- --debug=5005 $PWD/examples/server.config.example

Developer Information

Setting up intelliJ

  1. Follow the instructions in https://github.com/bazelbuild/intellij to install the bazel plugin for intelliJ
  2. Import the project using ij.bazelproject

Third-party Dependencies

Most third-party dependencies (e.g. protobuf, gRPC, ...) are managed automatically via rules_jvm_external. These dependencies are enumerated in the WORKSPACE with a maven_install artifacts parameter.

Things that aren't supported by rules_jvm_external are being imported as manually managed remote repos via the WORKSPACE file.

Deployments

Buildfarm can be used as an external repository for composition into a deployment of your choice.

Add the following to your WORKSPACE to get access to buildfarm targets, filling in the commit and sha256 values:

load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")

BUILDFARM_EXTERNAL_COMMIT = "<revision commit id>"
BUILDFARM_EXTERNAL_SHA256 = "<sha256 digest of url below>"

http_archive(
    name = "build_buildfarm",
    strip_prefix = "bazel-buildfarm-%s" % BUILDFARM_EXTERNAL_COMMIT,
    sha256 = BUILDFARM_EXTERNAL_SHA256,
    url = "https://github.com/bazelbuild/bazel-buildfarm/archive/%s.zip" % BUILDFARM_EXTERNAL_COMMIT,
)

load("@build_buildfarm//:deps.bzl", "buildfarm_dependencies")

buildfarm_dependencies()

load("@build_buildfarm//:defs.bzl", "buildfarm_init")

buildfarm_init()

Optionally, if you want to use the buildfarm docker container image targets, you can add this:

load("@build_buildfarm//:images.bzl", "buildfarm_images")

buildfarm_images()
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