Restructure

convert_jupytext.sh

@@ -0,0 +1,64 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+usage() {
+  cat <<'EOF'
+Usage:
+  jupytext_convert.sh to-py      # Convert all *.ipynb -> nb_*.py (py:percent)
+  jupytext_convert.sh to-ipynb   # Convert all nb_*.py -> *.ipynb
+
+Notes:
+  - Skips .ipynb_checkpoints.
+  - Output .py files are prefixed with "nb_" so you can filter with nb_*.py.
+  - Requires 'jupytext' in PATH (pip install jupytext).
+EOF
+}
+
+require_jupytext() {
+  if ! command -v jupytext >/dev/null 2>&1; then
+    echo "Error: jupytext not found in PATH. Install with 'pip install jupytext'." >&2
+    exit 1
+  fi
+}
+
+to_py() {
+  echo "Converting *.ipynb -> nb_*.py (py:percent)..."
+  # Find notebooks, skip .ipynb_checkpoints
+  find . -type f -name "*.ipynb" ! -path "*/.ipynb_checkpoints/*" -print0 |
+  while IFS= read -r -d '' nb; do
+    dir=$(dirname "$nb")
+    base=$(basename "$nb" .ipynb)
+    out="$dir/nb_${base}.py"
+    echo "  - $nb -> $out"
+    jupytext --to py:percent -o "$out" "$nb"
+  done
+  echo "Done."
+}
+
+to_ipynb() {
+  echo "Converting nb_*.py -> *.ipynb..."
+  find . -type f -name "nb_*.py" -print0 |
+  while IFS= read -r -d '' py; do
+    dir=$(dirname "$py")
+    base=$(basename "$py" .py)
+    # Strip the nb_ prefix when producing the .ipynb filename
+    bare="${base#nb_}"
+    out="$dir/${bare}.ipynb"
+    echo "  - $py -> $out"
+    jupytext --to ipynb -o "$out" "$py"
+  done
+  echo "Done."
+}
+
+main() {
+  [[ $# -eq 1 ]] || { usage; exit 1; }
+  require_jupytext
+  case "$1" in
+    py) to_py ;;
+    nb) to_ipynb ;;
+    -h|--help) usage ;;
+    *) echo "Unknown command: $1"; usage; exit 1 ;;
+  esac
+}
+
+main "$@"