feat(project): init

scripts/db/rollback.sh

@@ -0,0 +1,79 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+ROOT_DIR="$(cd "${SCRIPT_DIR}/../.." && pwd)"
+ROLLBACK_DIR="${SCRIPT_DIR}/rollback"
+
+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 ${ROOT_DIR}/.env)"
+  exit 1
+fi
+
+if ! command -v psql >/dev/null 2>&1; then
+  echo "psql not found in PATH"
+  exit 127
+fi
+
+ROLLBACK_TO_VERSION="${ROLLBACK_TO_VERSION:-}"
+DRY_RUN="${DRY_RUN:-0}"
+
+psql "${DATABASE_URL}" -v ON_ERROR_STOP=1 -c "CREATE TABLE IF NOT EXISTS _sqlx_migrations (version BIGINT PRIMARY KEY, description TEXT NOT NULL, installed_on TIMESTAMPTZ NOT NULL DEFAULT now(), success BOOLEAN NOT NULL, checksum BYTEA NOT NULL, execution_time BIGINT NOT NULL)" >/dev/null
+
+if [[ -z "${ROLLBACK_TO_VERSION}" ]]; then
+  echo "ROLLBACK_TO_VERSION is required (e.g. 1 or 0)"
+  exit 1
+fi
+
+while true; do
+  current="$(psql "${DATABASE_URL}" -At -c "SELECT version FROM _sqlx_migrations WHERE success=true ORDER BY version DESC LIMIT 1" || true)"
+  if [[ -z "${current}" ]]; then
+    echo "No applied migrations found"
+    exit 0
+  fi
+
+  if [[ "${current}" -le "${ROLLBACK_TO_VERSION}" ]]; then
+    echo "Rollback completed (current=${current}, target=${ROLLBACK_TO_VERSION})"
+    exit 0
+  fi
+
+  file="${ROLLBACK_DIR}/$(printf "%04d" "${current}").down.sql"
+  if [[ ! -f "${file}" ]]; then
+    echo "Rollback file not found for version ${current}: ${file}"
+    exit 1
+  fi
+
+  echo "Rolling back version ${current} using $(basename "${file}")"
+  if [[ "${DRY_RUN}" == "1" ]]; then
+    psql "${DATABASE_URL}" -v ON_ERROR_STOP=1 -c "SELECT ${current}" >/dev/null
+  else
+    psql "${DATABASE_URL}" -v ON_ERROR_STOP=1 -f "${file}"
+    psql "${DATABASE_URL}" -v ON_ERROR_STOP=1 -c "DELETE FROM _sqlx_migrations WHERE version=${current}"
+  fi
+done
+