preview.sh

#!/bin/zsh
# Renders all projects, serves docs/ locally, and auto-reloads on changes.
# Usage: ./preview.sh

set -e

ROOT="$(cd "$(dirname "$0")" && pwd)"
PORT="${1:-8000}"

render_all() {
  echo "==> Rendering main site..."
  quarto render "$ROOT" 2>&1 || true

  echo "==> Rendering microbiome..."
  quarto render "$ROOT/microbiome" 2>&1 || true

  echo "==> Rendering mutual-funds..."
  quarto render "$ROOT/mutual-funds" 2>&1 || true

  echo "==> Render complete at $(date +%H:%M:%S)"
}

cleanup() {
  echo "\n==> Shutting down..."
  [[ -n "$SERVER_PID" ]] && kill "$SERVER_PID" 2>/dev/null
  [[ -n "$WATCH_PID" ]]  && kill "$WATCH_PID" 2>/dev/null
  exit 0
}
trap cleanup INT TERM

# --- Initial render ---
render_all

# --- Start HTTP server in background ---
python3 -m http.server "$PORT" --directory "$ROOT/docs" &
SERVER_PID=$!

echo ""
echo "==> Serving at http://localhost:$PORT"
echo "     Main site:        http://localhost:$PORT"
echo "     Vol 1 Microbiome: http://localhost:$PORT/microbiome/"
echo "     Vol 2 Finance:    http://localhost:$PORT/mutual-funds/"
echo ""

# --- Watch for changes and re-render ---
if command -v fswatch &>/dev/null; then
  echo "==> Watching for changes (fswatch)... Press Ctrl+C to stop."
  fswatch --one-per-batch --latency=1 \
    --exclude='\.git' --exclude='_site' --exclude='_book' --exclude='docs' --exclude='\.quarto' \
    --include='\.qmd$' --include='\.yml$' --include='\.css$' --include='\.bib$' --include='\.tex$' \
    "$ROOT" | while read -r; do
      echo ""
      echo "==> Change detected, re-rendering..."
      render_all
    done &
  WATCH_PID=$!
else
  echo "==> fswatch not found; falling back to polling (every 3s)..."
  (
    get_fingerprint() {
      find "$ROOT" \( -name '*.qmd' -o -name '*.yml' -o -name '*.css' -o -name '*.bib' -o -name '*.tex' \) \
        -not -path '*/.git/*' -not -path '*/_site/*' -not -path '*/_book/*' -not -path '*/docs/*' -not -path '*/.quarto/*' \
        -exec stat -f '%m %N' {} + 2>/dev/null | sort | md5
    }
    LAST=$(get_fingerprint)
    while true; do
      sleep 3
      NOW=$(get_fingerprint)
      if [[ "$NOW" != "$LAST" ]]; then
        echo ""
        echo "==> Change detected, re-rendering..."
        render_all
        LAST=$(get_fingerprint)
      fi
    done
  ) &
  WATCH_PID=$!
fi

wait