name: Update WIT
on:
  workflow_dispatch:

permissions:
  contents: write

jobs:
  update-wit:
    name: Update WIT
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v6
        with:
          submodules: true

      - name: Set up Zig
        uses: mlugg/setup-zig@v2
        with:
          version: 0.16.0

      - name: Set up wasm-tools
        uses: bytecodealliance/actions/wasm-tools/setup@v1
        with:
          # The generated src/plugin.wit is printed by wasm-tools, keep this in
          # sync with what `zig build gen` was last run with.
          version: "1.259.0"

      - name: Update submodule
        id: update_submodule
        run: |
          set -eux

          cd wit
          git fetch origin master
          git checkout FETCH_HEAD

          echo "wit_commit=$(git rev-parse --short HEAD)" >> $GITHUB_OUTPUT

      - name: Regenerate bindings
        run: |
          set -eux

          zig build gen
          zig build test
          zig build check
          zig build

      - name: Commit
        run: |
          set -eux

          witCommit='${{ steps.update_submodule.outputs.wit_commit }}'

          git config user.name "github-actions[bot]"
          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"

          git add wit src
          if git diff --cached --quiet; then
            echo "already up to date"
            exit 0
          fi
          git commit -m "Sync to Pumpkin-MC/pumpkin-plugin-wit@${witCommit}"
          git push