fix(sql): fix sql script

scripts/db/rollback.sh

@@ -0,0 +1,101 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+ROOT_DIR="$(cd "${SCRIPT_DIR}/../.." && pwd)"
+
+load_database_url_from_env_file() {
+  local env_file="$1"
+  local line value
+  while IFS= read -r line || [[ -n "${line}" ]]; do
+    line="${line#"${line%%[![:space:]]*}"}"
+    [[ -z "${line}" || "${line}" == \#* ]] && continue
+    line="${line#export }"
+    if [[ "${line}" == DATABASE_URL=* ]]; then
+      value="${line#DATABASE_URL=}"
+      value="${value%$'\r'}"
+      value="${value%\"}"
+      value="${value#\"}"
+      value="${value%\'}"
+      value="${value#\'}"
+      printf '%s' "${value}"
+      return 0
+    fi
+  done < "${env_file}"
+  return 1
+}
+
+DATABASE_URL="${DATABASE_URL:-}"
+if [[ -z "${DATABASE_URL}" && -f "${ROOT_DIR}/.env" ]]; then
+  DATABASE_URL="$(load_database_url_from_env_file "${ROOT_DIR}/.env" || true)"
+fi
+if [[ -z "${DATABASE_URL}" ]]; then
+  echo "DATABASE_URL is required (export it, or set it in ${ROOT_DIR}/.env)"
+  exit 1
+fi
+
+if ! command -v psql >/dev/null 2>&1; then
+  echo "psql not found in PATH"
+  exit 127
+fi
+
+CONFIRM="${CONFIRM:-0}"
+if [[ "${CONFIRM}" != "1" ]]; then
+  echo "Refusing to run rollback without CONFIRM=1"
+  exit 1
+fi
+
+TARGET_VERSION="${TARGET_VERSION:-}"
+STEPS="${STEPS:-1}"
+
+if ! psql "${DATABASE_URL}" -v ON_ERROR_STOP=1 -c "SELECT 1 FROM iam_schema_migrations LIMIT 1" >/dev/null 2>&1; then
+  echo "No iam_schema_migrations table found; nothing to rollback"
+  exit 0
+fi
+
+applied_versions=()
+while IFS= read -r v; do
+  [[ -n "${v}" ]] && applied_versions+=( "${v}" )
+done < <(psql "${DATABASE_URL}" -At -c "SELECT version FROM iam_schema_migrations ORDER BY version DESC")
+
+if [[ ${#applied_versions[@]} -eq 0 ]]; then
+  echo "No applied migrations; nothing to rollback"
+  exit 0
+fi
+
+to_rollback=()
+if [[ -n "${TARGET_VERSION}" ]]; then
+  for v in "${applied_versions[@]}"; do
+    if [[ "${v}" > "${TARGET_VERSION}" ]]; then
+      to_rollback+=( "${v}" )
+    fi
+  done
+else
+  count=0
+  for v in "${applied_versions[@]}"; do
+    to_rollback+=( "${v}" )
+    count=$((count + 1))
+    if [[ "${count}" -ge "${STEPS}" ]]; then
+      break
+    fi
+  done
+fi
+
+if [[ ${#to_rollback[@]} -eq 0 ]]; then
+  echo "No migrations to rollback"
+  exit 0
+fi
+
+for v in "${to_rollback[@]}"; do
+  down_file="${SCRIPT_DIR}/rollback/${v}.down.sql"
+  if [[ ! -f "${down_file}" ]]; then
+    echo "Missing rollback script: ${down_file}"
+    exit 1
+  fi
+  echo "Rolling back ${v}"
+  psql "${DATABASE_URL}" -v ON_ERROR_STOP=1 -f "${down_file}"
+  psql "${DATABASE_URL}" -v ON_ERROR_STOP=1 -c "DELETE FROM iam_schema_migrations WHERE version='${v}'"
+done
+
+echo "Rollback completed"
+