A simple Github Actions workflow for releasing TestFlight builds with Fastlane.

testflight.yml

name: Release to TestFlight internally and bump build number
on: [workflow_dispatch]

jobs:
  internal_testflight:
    runs-on: macos-latest
    steps:
    - uses: actions/checkout@v2

    # We use a deploy key (i.e. public key) in the Houston-App/certificates repo to
    # access the certificates from this action. The private key is stored as a secret on
    # this repo
    - name: Set up SSH agent to access cert repo
      uses: webfactory/[email protected]
      with:
        ssh-private-key: ${{ secrets.CERT_REPO_DEPLOY_PRIVATE_KEY }}

    - name: Get yarn cache directory path
      id: yarn-cache-dir-path
      run: echo "::set-output name=dir::$(yarn cache dir)"

    - name: Use yarn cache
      uses: actions/cache@v2
      id: yarn-cache
      with:
        path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
        key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
        restore-keys: |
          ${{ runner.os }}-yarn-

    - name: Use Pod cache
      uses: actions/cache@v2
      with:
        path: Pods
        key: ${{ runner.os }}-pods-${{ hashFiles('ios/Podfile.lock') }}
        restore-keys: |
          ${{ runner.os }}-pods-

    - name: Use [email protected]
      uses: actions/setup-node@v1
      with:
        node-version: 12.x

    - name: Install packages and pods
      run: yarn install --frozen-lockfile --prefer-offline && npx pod-install

    - name: Install FastLane
      run: cd ios && gem install fastlane -NV

    - name: Build and Release
      env:
        APP_STORE_CONNECT_KEY: ${{ secrets.APP_STORE_CONNECT_KEY }}
        # Match is Fastlane's certificate and provisioning profile management tool
        # See https://docs.fastlane.tools/actions/match/
        # The certificates are encrypted with a password, stored in this repo's secrets
        MATCH_PASSWORD: ${{ secrets.MATCH_PASSWORD }}
      run: cd ios && fastlane ios beta

    - name: Commit build number increment
      run: |
        git config --local user.email "github-actions[bot]@users.noreply.github.com"
        git config --local user.name "github-actions[bot]"
        git commit -m "Bump build number." -a

    - name: Commit build increment
      uses: ad-m/github-push-action@master
      with:
        github_token: ${{ secrets.GITHUB_TOKEN }}
        branch: ${{ github.ref }}