Clone this repo:


  1. a6c1190 Update CELAB LUCI logo by Xiang Ji · 2 hours ago master
  2. c7e398d Encode the UI test's response as utf-8, otherwise some special characters cannot be encoded. by Xiang Ji · 6 days ago
  3. 8552df8 Add full Windows Server 2019 support by Xiang Ji · 7 days ago
  4. 30bad3e Update CEL LUCI owners by Xiang Ji · 3 weeks ago
  5. a264bac Update URLs in background markdown doc by Xiang Ji · 4 weeks ago

Chrome Enterprise Lab

Chrome Enterprise Lab is an inaccurately named set of tools for building enterprise labs quickly and easily. The labs so built can be used for system level end-to-end testing of Google Chrome/Chromium.

Have a peek at the Design document.

Also have a peek at the Code of Conduct.

Most of the code is in Go. See Guide to code to get a head start on the code in this repository.



  • Go: Download Go from the Go download page. This project requires Go 1.9.4 or later. The build will fail with prior versions.

  • Depot Tools: Used for managing the checkout and the contributor workflow.

  • Protocol Buffers Compiler: Protocol buffers are used extensively for wranging all the data that needs to be shuttled around. Run protoc --version to check the protoc version. The protoc version should be at least 3.5.1. If protoc is not installed, or if the version is less than 3.5.1, download it from

    Remember that you need to copy the contents of the include directory of the zip file into /usr/local/include/ as well, i.e.

    >> cd tmp
    >> wget
    >> unzip -d protoc
    >> sudo cp protoc/bin/protoc /usr/local/bin/protoc
    >> sudo mv include/* /usr/local/include/
    >> rm -rf protoc3
  • Dep : Used for Go depedency management. This can be installed automatically by running ./ deps --install from the root of the source tree.

  • Go support for Protocol Buffers : This can be installed automatically by running ./ deps --install from the root of the source tree.

  • absl-py: This Python package is used by tests. Install it by running pip install absl-py.

Get The Source

There are two ways to get the source. One is to use managed deps, and the other is to use plain go get. The latter workflow doesn't quite work yet due to this repository not being integrated with So this page only mentions the managed dependency workflow.

  1. Clone this repository:

    Assumes that $GOPATH is a single path and not a : delimited list.

    mkdir -p ${GOPATH}/src/
    cd ${GOPATH}/src/
    git clone
    cd cel
  2. Get the dependencies:

    python deps --install

    If you see an error message complaining about protoc missing, see the protoc prerequisites above.

Build It

  1. Use the build script:

    python build

    If you see an error message like google/protobuf/descriptor.proto: File not found, see the protoc prerequisites (specifically the includes step).

  2. Also make sure the tests pass.

    python test




The framework is uploaded into CIPD as a package.

Here are the general steps to release the package.

  1. After the code review, merge in the change
  2. Wait for windows CI build finished (
  3. Run upload_to_cipd with the link to binaries in the CI build (instructions here:
  4. (Optional) Check the output of that command and update the infra version in the .vpython file for your app