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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