What's inside?

With this Expo action, you have full access to Expo CLI and EAS CLI. It lets you automate the expo publish or eas build commands, leaving you with more time to work on your project. Some additional features are included to make the usage of this action as simple as possible, like caching and authentication.

Configuration options

Create your EXPO_TOKEN GitHub secret.

This action is customizable through variables defined in the action.yml. Here is a summary of all the input options you can use.

Example workflows

Before diving into the workflow examples, you should know the basics of GitHub Actions. You can read more about this in the GitHub Actions documentation.

1. Publish on any push to main
2. Creating a new EAS build
3. Publish a preview from PR

Publish on any push to main

This workflow listens to the push event on the main branch. It sets up all required components to publish the app, including authentication with a token.

Always use secrets when using tokens.

on:
  push:
    branches:
      - main
jobs:
  publish:
    runs-on: ubuntu-latest
    steps:
      - name: 🏗 Setup repo
        uses: actions/checkout@v2

      - name: 🏗 Setup Node
        uses: actions/setup-node@v2
        with:
          node-version: 16.x
          cache: yarn

      - name: 🏗 Setup Expo
        uses: expo/expo-github-action@v7
        with:
          expo-version: latest
          token: ${{ secrets.EXPO_TOKEN }}

      - name: 📦 Install dependencies
        run: yarn install

      - name: 🚀 Publish app
        run: expo publish --non-interactive

Creating a new EAS build

This action also allows you to install the EAS CLI. To do this, add the eas-version property, and the action will install it. We recommend using latest for the EAS CLI.

The token is shared for both Expo and EAS CLI.

on:
  push:
    branches:
      - main
jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - name: 🏗 Setup repo
        uses: actions/checkout@v2

      - name: 🏗 Setup Node
        uses: actions/setup-node@v2
        with:
          node-version: 16.x
          cache: yarn

      - name: 🏗 Setup Expo and EAS
        uses: expo/expo-github-action@v7
        with:
          expo-version: latest
          eas-version: latest
          token: ${{ secrets.EXPO_TOKEN }}

      - name: 📦 Install dependencies
        run: yarn install

      - name: 🚀 Build app
        run: eas build --non-interactive

Publish a preview from PR

Reviewing pull requests can take some time. The reviewer needs to check out the branch, install the changes, and run the bundler to review the results. You can also automatically publish the project for the reviewer to skip those manual steps.

This workflow publishes the changes on the pr-# release channel and adds a comment to the pull request once it's ready for review.

See the preview-comment docs.

on: [pull_request]
jobs:
  publish:
    runs-on: ubuntu-latest
    steps:
      - name: 🏗 Setup repo
        uses: actions/checkout@v2

      - name: 🏗 Setup Node
        uses: actions/setup-node@v2
        with:
          node-version: 16.x
          cache: yarn

      - name: 🏗 Setup Expo
        uses: expo/expo-github-action@v7
        with:
          expo-version: latest
          token: ${{ secrets.EXPO_TOKEN }}

      - name: 📦 Install dependencies
        run: yarn install

      - name: 🚀 Publish preview
        run: expo publish --release-channel=pr-${{ github.event.number }} --non-interactive

      - name: 💬 Comment preview
        uses: expo/expo-github-action/preview-comment@v7
        with:
          channel: pr-${{ github.event.number }}

Things to know

Automatic Expo login

Some Expo commands, like expo publish and eas build, require you to be authenticated. This action exports the token to ensure you are authenticated in every workflow step.

Note, this action does not store the token anywhere. Each separate workflow job needs to set up the token individually.

Using the built-in cache

You can opt-out from caching the Expo and EAS CLI installations. Under the hood, it uses the @actions/cache package to restore a previous install. It reduces the installation time because it only needs to download and extract a single tar file.

Note, using cache will count towards your repo cache limit. Both the Expo and EAS CLI are stored in different caches.

ENOSPC errors on Linux

Creating new bundles with Metro can be memory intensive. In the past, some builds resulted in ENOSPC errors. To prevent anyone from running into this, we make sure Ubuntu has sensible defaults in terms of file system availability. You can opt-out from patching the file system by setting patch-watchers to false.