Add standalone OWASP cheat sheet refresh script

scripts/update-cheatsheets.sh

@@ -0,0 +1,99 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+VENV_DIR="$ROOT_DIR/venv"
+CACHE_FILE="${1:-$ROOT_DIR/standards_cache.sqlite}"
+REQ_FILE="$ROOT_DIR/requirements.txt"
+STAMP_FILE="$VENV_DIR/.requirements.stamp"
+
+# Ensure virtual environment exists
+if [[ ! -d "$VENV_DIR" ]]; then
+  echo "Creating virtual environment in $VENV_DIR"
+  python3 -m venv "$VENV_DIR"
+fi
+
+source "$VENV_DIR/bin/activate"
+
+# Install requirements only if they have changed (optional optimisation)
+if [[ ! -f "$STAMP_FILE" ]] || [[ "$REQ_FILE" -nt "$STAMP_FILE" ]]; then
+  echo "Installing Python runtime dependencies"
+  pip install -r "$REQ_FILE"
+  touch "$STAMP_FILE"
+else
+  echo "Requirements up to date, skipping pip install"
+fi
+
+if [[ ! -f "$CACHE_FILE" ]]; then
+  echo "Database file does not exist: $CACHE_FILE" >&2
+  exit 1
+fi
+
+# Create a timestamped backup with PID to avoid collisions
+BACKUP_FILE="${CACHE_FILE}.$(date +%Y%m%d%H%M%S)_$$.bak"
+
+# Online backup + integrity check (safe for live DB, handles WAL)
+python -c "
+import sqlite3, sys
+src, dst = sys.argv[1], sys.argv[2]
+try:
+    with sqlite3.connect(src) as src_conn:
+        with sqlite3.connect(dst) as dst_conn:
+            src_conn.backup(dst_conn)
+            cur = dst_conn.cursor()
+            cur.execute('PRAGMA integrity_check')
+            if cur.fetchone()[0] != 'ok':
+                print('Integrity check failed for backup', file=sys.stderr)
+                sys.exit(1)
+except Exception as e:
+    print(f'Backup failed: {e}', file=sys.stderr)
+    sys.exit(1)
+" "$CACHE_FILE" "$BACKUP_FILE"
+
+if [[ ! -f "$BACKUP_FILE" ]]; then
+  echo "Failed to create backup at $BACKUP_FILE" >&2
+  exit 1
+fi
+echo "Created verified backup at $BACKUP_FILE"
+
+export CRE_NO_CALCULATE_GAP_ANALYSIS=1
+export CRE_NO_GEN_EMBEDDINGS=1
+
+echo "Importing OWASP Cheat Sheet data into $CACHE_FILE"
+python "$ROOT_DIR/cre.py" --cheatsheets_in --cache_file "$CACHE_FILE"
+
+# Normalise GitHub links to official HTML links
+python - "$CACHE_FILE" <<'PY'
+import os
+import sqlite3
+import sys
+
+db_path = sys.argv[1]
+conn = sqlite3.connect(db_path)
+cur = conn.cursor()
+
+github_prefix = "https://github.com/OWASP/CheatSheetSeries/tree/master/cheatsheets/"
+official_prefix = "https://cheatsheetseries.owasp.org/cheatsheets/"
+
+rows = cur.execute(
+    """
+    select id, link
+    from node
+    where name = 'OWASP Cheat Sheets'
+      and link like ?
+    """,
+    (f"{github_prefix}%",),
+).fetchall()
+
+for node_id, link in rows:
+    filename = os.path.basename(link)
+    html_name = os.path.splitext(filename)[0] + ".html"
+    cur.execute(
+        "update node set link = ? where id = ?",
+        (f"{official_prefix}{html_name}", node_id),
+    )
+
+conn.commit()
+conn.close()
+print(f"Normalized {len(rows)} OWASP Cheat Sheet links")
+PY