Clone this repo:
  1. edc3cd1 update test specification style by Nicholas Bishop · 4 hours ago main
  2. 80a446c Roll CAS Client from e6630cac546f to a80cc32b1739 by chromium-autoroll · 22 hours ago
  3. 1caa943 context: Correct misleading comment about inspect the recipe env by Ben Pastene · 22 hours ago
  4. ebae866 [url] Correct default step name in docstrings by Rob Mohr · 24 hours ago
  5. ac1405b [cipd] Add ensure_file_resolve() function by Anthony Fandrianto · 4 days ago


Recipes are a domain-specific language (embedded in Python) for specifying sequences of subprocess calls in a cross-platform and testable way.

They allow writing build flows which integrate with the rest of LUCI.

Documentation for the recipe engine (including this file!). Take a look at the user guide for some hints on how to get started. See the implementation details doc for more detailed implementation information about the recipe engine.


  • Sign the Google CLA.
  • Make sure your and are configured in git config.

Run the following to setup the code review tool and create your first review:

# Get `depot_tools` in $PATH if you don't have it
git clone $HOME/src/depot_tools
export PATH="$PATH:$HOME/src/depot_tools"

# Check out the recipe engine repo
git clone $HOME/src/recipes-py

# make your change
cd $HOME/src/recipes-py
git new-branch cool_feature
# hack hack
git commit -a -m "This is awesome"

# This will ask for your Google Account credentials.
git cl upload -s -r
# Wait for approval over email.
# Click "Submit to CQ" button or ask reviewer to do it for you.
# Wait for the change to be tested and landed automatically.

Use git cl help and git cl help <cmd> for more details.