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237 Stars 78 Forks Apache License 2.0 1.9K Commits 110 Opened issues


A collection of bots, based on probot, for performing common maintenance tasks across the open-source repos managed by Google on GitHub.

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Repo Automation Bots

A collection of bots, based on probot, for performing common maintenance tasks across the open-source repos managed by Google on GitHub.

Implemented Bots

| Name | Description | Install | | ---- | ----------- | ------- | | auto-approve | Automatically approves and merges PRs matching user-specified configs | install | | auto-label | Automatically labels issues and PRs with product, language, or directory based labels | install | | blunderbuss | Assigns issues and PRs randomly to a specific list of users | install | | flakybot | Listen on PubSub queue for broken builds, and open corresponding issues | install | | conventional-commit-lint | PR checker that ensures that the commit messages follow style | install | | do-not-merge | PR checker that ensures the

do not merge
label is not present | install | failurechecker | Check for automation tasks, e.g., releases, that are in a failed state | install | | generated-files-bot | PR checker to notify if you are modifying generated files | install | license-header-lint | PR checker that ensures that source files contain valid license headers | install | | label-sync | Synchronize labels across organizations | install | | merge-on-green | Merge a pull-request when all required checks have passed | install | | policy | Check repo configuration against known rules | install | | release-please | Proposes releases based on semantic version commits | install | | release-trigger | Trigger releases jobs | install | | snippet-bot | Check for mismatched region tags in PRs | install | | sync-repo-settings | Synchronize repository settings from a centralized config | install | | trusted-contribution | Allows Kokoro CI to trigger for trusted contributors | install |

Development environment

You need to install node.js version 12 or higher.

To manage multiple Node.js versions, you can use nvm.

Running the app locally

Create a Proxy to Relay Webhooks

In order to forward to your local machine, you can use Visit and create a proxy for relaying webhooks to your local web-service. After creating the proxy, you'll get the URL of the new proxy.

In the root directory of

, run:
npm run proxy -- -u 

Creating the Development Application

If it's your first time running your application, you should create a new GitHub application using the probot server:

  1. cd packages/your-bot
  2. npm start
  3. visit: http://localhost:3000 and install.

Granting the Development Application permissions and events

  1. By default there will be no permissions. Visit, click configure, then 'app settings'.
  2. Navigate to Permissions and Events. You likely need 'Repository > Pull Requests' for permissions.
  3. You also will need to subscribe to events (bottom of page). For instance, if your bot responds to PR activity, the 'Events > Pull Request' should be enabled.

Install the bot on a repo

  1. Follow the link to install the app and navigate to 'Install App', if installed on the organization you desire (likely yourself for testing), click the gear.
  2. Under permissions ensure that there aren't pending requests to be approved
  3. Under repository access select only select repositories. Select the repository you wish to test against.

Running Your Application

Once you've created your application, and installed it on some of your repos, start probot again, setting the following environment variables. Most can be found at{YOUR_APP}:

  • APP_ID
    : the ID, listed near the top,
    App ID: 12345
    : path to App's private key, you can request a new one be created and downloaded at the bottom of the page.
    • Alternatively, set the GitHub client ID and secret:
        : client ID from the top of the page.
        : client secret from the top of the page.
    : secret key set in GitHub developer settings. Edit this to a known value in the settings page.

Environment variables set, run:

  1. cd packages/your-bot
  2. npm start

Running bots on a Cron

To run a bot on a schedule include a file in your bot's folder named

whose content is valid unix -cron format. This will create a Cloud Scheduler Job which makes requests to your endpoint at the specified schedule.

Publishing Utility Modules

  1. create a token with Wombat Dressing Room.
  2. run
    npm run release

Overall Architecture

High Level Architecture

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