3.0.1 • Public • Published

    🔌 @probot/adapter-github-actions

    Adapter to run a Probot application function in GitHub Actions

    Build Status


    Create your Probot Application as always

    // app.js
    module.exports = (app) => {
      app.on("issues.opened", async (context) => {
        const params = context.issue({ body: "Hello World!" });
        await context.octokit.issues.createComment(params);

    Then in the entrypoint of your GitHub Action, require @probot/github-action instead of probot

    // index.js
    const { run } = require("@probot/github-action");
    const app = require("./app");
    run(app).catch((error) => {

    Then use index.js as your entrypoint in the action.yml file

    name: "Probot app name"
    description: "Probot app description."
      using: "node12"
      main: "action.js"

    Important: Your external dependencies will not be installed, you have to either vendor them in by committing the contents of the node_modules folder, or compile the code to a single executable script (recommended). See GitHub's documentation

    For an example Probot App that is continuously published as GitHub Action, see https://github.com/probot/example-github-action#readme

    How it works

    Probot is a framework for building GitHub Apps, which is different to creating GitHub Actions in many ways, but the functionality is the same:

    Both get notified about events on GitHub, which you can act on. While a GitHub App gets notified about a GitHub event via a webhook request sent by GitHub, a GitHub Action can receive the event payload by reading a JSON file from the file system. We can abstract away the differences, so the same hello world example app shown above works in both environments.

    Relevant differences for Probot applications:

    1. You cannot authenticate as the app. The probot instance you receive is authenticated using a GitHub token. In most cases the token will be set to secrets.GITHUB_TOKEN, which is an installation access token. The provided GITHUB_TOKEN expires when the job is done or after 6 hours, whichever comes first. You do not have access to an APP_ID or PRIVATE_KEY, you cannot create new tokens or renew the provided one.
    2. secrets.GITHUB_TOKEN is scoped to the current repository. You cannot read data from other repositories unless they are public, you cannot update any other repositories, or access organization-level APIs.
    3. You could provide a personal access token instead of secrets.GITHUB_TOKEN to workaround the limits of a repository-scoped token, but be sure you know what you are doing.
    4. You don't need to configure WEBHOOK_SECRET, because no webhook request gets sent, the event information can directly be retrieved from environment variables and the local file system.

    For a more thorough comparison, see @jasonetco's posts:

    1. Probot App or GitHub Action (Jan 2019)
    2. Update from April 2020




    npm i @probot/adapter-github-actions

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