new-sync-notebook.yml

name: Notebook & Markdown syncing on commit

on:
  push:

jobs:
  check-files:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout repository
        uses: actions/checkout@v2
        with:
          fetch-depth: 0

      - name: Get changed files and sync notebooks
        shell: bash
        run: |
          # checking if article.ipynb exists; if not, exiting with error.
          if [ ! -f "article.ipynb" ]; then
            echo "Error: article.ipynb does not exist. Exiting."
            exit 1
          fi

          # Check if article.md exists
          if [ -f "article.md" ]; then
            MD_EXISTS=true
          else
            MD_EXISTS=false
          fi

          # Save the before and after commit hashes
          BEFORE_COMMIT="${{ github.event.before }}"
          AFTER_COMMIT="${{ github.event.after }}"

          # Determine changed files based on commit history.
          if [ "$BEFORE_COMMIT" = "0000000000000000000000000000000000000000" ]; then
            echo "No previous commit found. Using last commit for file changes."
            CHANGED_FILES=$(git diff-tree --no-commit-id --name-only -r HEAD)
          else
            if ! git rev-parse "$BEFORE_COMMIT" >/dev/null 2>&1; then
              echo "Before commit not found. Using last commit for file changes."
              CHANGED_FILES=$(git diff-tree --no-commit-id --name-only -r HEAD)
            else
              CHANGED_FILES=$(git diff --name-only "$BEFORE_COMMIT" "$AFTER_COMMIT")
            fi
          fi

          echo "Changed files: $CHANGED_FILES"

          # Check which target files have changed.
          IPYNB_CHANGED=$(echo "$CHANGED_FILES" | grep -c '^article\.ipynb$' || true)
          MD_CHANGED=$(echo "$CHANGED_FILES" | grep -c '^article\.md$' || true)

          if [ "$IPYNB_CHANGED" -gt 0 ] && [ "$MD_CHANGED" -gt 0 ]; then
            echo "Error: Both article.ipynb and article.md have changed. Revert changes to one of them to perform synchronization."
            exit 1
          elif [ "$IPYNB_CHANGED" -gt 0 ]; then
            echo "article.ipynb has changed."
            if [ "$MD_EXISTS" = false ]; then
              echo "article.md does not exist. Creating article.md from article.ipynb..."
              pip install jupytext || pip install jupytext --break-system-packages
              jupytext --to markdown article.ipynb
              echo "article.md created successfully."
            else
              echo "article.md exists. Converting article.ipynb to markdown to synchronize changes..."
              pip install jupytext || pip install jupytext --break-system-packages
              jupytext --to markdown article.ipynb
              echo "Synchronization complete for article.md."
            fi
          elif [ "$MD_CHANGED" -gt 0 ]; then
            echo "article.md has changed. Synchronizing article.ipynb with the updated markdown..."
            pip install jupytext || pip install jupytext --break-system-packages
            jupytext --set-formats ipynb,md article.ipynb
            jupytext --sync article.ipynb
            echo "Synchronization complete for article.ipynb."
          else
            echo "No target file changes detected."
          fi

      - name: Committing changes
        uses: stefanzweifel/git-auto-commit-action@v5
        with:
          commit_message: Automated commit
          branch: ${{ github.ref }}
          create_branch: false