CircleCI Canceller

A clockwork application that cancels superfluous builds in queue or running.

Features

• Collects new build state frequently, once every 20 seconds.
• Cancels builds if a newer build is queued for the same branch.
• Ignores select branches.
• Ignores builds that are already in or have completed the deployment phase.
• Ignores builds that have been buildings for X mins (if they are marked as a deploy branch).

Usage

Deploy to Heroku with the following environment variables:

• CIRCLECI_USERNAME e.g. gumroad
• CIRCLECI_PROJECTS e.g. web api
• CIRCLECI_API_TOKEN_[project] e.g. a17098...
• BRANCHES_TO_IGNORE_[project] e.g. master staging
• BRANCHES_THAT_DEPLOY_[project] e.g. deploy
• BRANCHES_WITH_SAFE_TIME_[project] e.g. deploy,5 newfeature,2 (deploy won't be cancelled if it's been building for 5 minutes, similarly for newfeature with 2 minutes)

CIRCLECI_USERNAME=gumroad
CIRCLECI_PROJECTS=web api

CIRCLECI_API_TOKEN_web=a17098...
BRANCHES_TO_IGNORE_web=master staging
BRANCHES_THAT_DEPLOY_web=deploy
BRANCHES_WITH_SAFE_TIME_web=deploy,5

CIRCLECI_API_TOKEN_api=ba7698...
BRANCHES_THAT_DEPLOY_api=master