update-database.yml

name: Scheduled database updates
on:
  push:
    paths:
      - .github/workflows/update-database.yml
  schedule:
    # Once every day at midnight UTC
    - cron: "0 0 * * *"
  workflow_dispatch:
    inputs:
      max-downloads:
        description: Maximum number of formulae to download when updating
        required: false

jobs:
  update-database:
    if: startsWith( github.repository, 'Homebrew/' )
    runs-on: macos-latest
    steps:
      - name: Set up Homebrew
        id: set-up-homebrew
        uses: Homebrew/actions/setup-homebrew@master

      - name: Configure Git user
        uses: Homebrew/actions/git-user-config@master
        with:
          username: BrewTestBot

      - name: Set up commit signing
        uses: Homebrew/actions/setup-commit-signing@master
        with:
          signing_key: ${{ secrets.BREWTESTBOT_GPG_SIGNING_SUBKEY }}

      - name: Check out repository
        uses: actions/checkout@main
        with:
          fetch-depth: 0
          ref: master
          path: repo

      - name: Update database
        working-directory: repo
        env:
          HOMEBREW_GPG_PASSPHRASE: ${{ secrets.BREWTESTBOT_GPG_SIGNING_SUBKEY_PASSPHRASE }}
          MAX_DOWNLOADS: ${{ github.event.inputs.max-downloads }}
        run: |
          set -eo pipefail

          if [[ -n "$MAX_DOWNLOADS" ]]
          then
            MAX_DOWNLOADS_ARGS="--max-downloads $MAX_DOWNLOADS"
          fi

          # Need to intentionally leave MAX_DOWNLOADS_ARGS unquoted.
          # shellcheck disable=SC2086
          brew which-update --commit --update-existing --install-missing $MAX_DOWNLOADS_ARGS executables.txt

      - name: Output database stats
        working-directory: repo
        run: brew which-update --stats executables.txt

      - name: Push commits
        uses: Homebrew/actions/git-try-push@master
        if: github.ref == 'refs/heads/master'
        with:
          token: ${{ secrets.HOMEBREW_GITHUB_PUBLIC_REPO_TOKEN }}
          directory: repo