update-python.yml

name: Update python Submodule

on:
  workflow_dispatch:
  repository_dispatch:
    types: [python-release]

jobs:
  update-submodule:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout this repository
        uses: actions/checkout@v4
        with:
          submodules: true
          fetch-depth: 0
          token: ${{ secrets.GITHUB_TOKEN }}

      - name: Pull latest python
        id: update
        run: |
          git submodule update --init --remote -- python
          cd python
          new_sha=$(git rev-parse HEAD)
          echo "new_sha=$new_sha" >> $GITHUB_OUTPUT
          echo "Pulled python @ $new_sha"

      - name: Check for changes
        id: check
        run: |
          if git diff --quiet -- python; then
            echo "No submodule pointer change — already at latest"
            echo "changed=false" >> $GITHUB_OUTPUT
          else
            echo "Submodule pointer changed"
            echo "changed=true" >> $GITHUB_OUTPUT
          fi

      - name: Commit and push
        if: steps.check.outputs.changed == 'true'
        run: |
          git config --global user.name 'github-actions[bot]'
          git config --global user.email 'github-actions[bot]@users.noreply.github.com'
          git add python
          git commit -m "Update python submodule to ${{ steps.update.outputs.new_sha }}"
          git push
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      - name: Report no changes
        if: steps.check.outputs.changed != 'true'
        run: echo "python is already at the latest commit — nothing to commit."