chore: import upstream snapshot with attribution

scripts/e2e/bake_template.sh

@@ -0,0 +1,95 @@
+#!/usr/bin/env bash
+# One-time bootstrap for the DocsGPT e2e Postgres template DB.
+#
+# Creates two databases on the native DBngin Postgres instance:
+#   * docsgpt_e2e_template  — schema-only (alembic head), marked as a PG template
+#   * docsgpt_e2e           — the live DB the first `up.sh` run connects to
+#
+# Idempotent. Safe to re-run after schema changes to refresh the template.
+
+set -euo pipefail
+
+PG_BIN="/Users/Shared/DBngin/postgresql/16.2/bin"
+PSQL="${PG_BIN}/psql"
+PG_ISREADY="${PG_BIN}/pg_isready"
+
+PG_HOST="127.0.0.1"
+PG_PORT="5432"
+PG_SUPERUSER="postgres"
+
+TEMPLATE_DB="docsgpt_e2e_template"
+E2E_DB="docsgpt_e2e"
+OWNER_ROLE="docsgpt"
+OWNER_PASSWORD="docsgpt"
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+REPO_ROOT="$(cd "${SCRIPT_DIR}/../.." && pwd)"
+
+log() {
+  printf '[bake_template] %s\n' "$*" >&2
+}
+
+if [[ ! -x "${PSQL}" ]]; then
+  log "psql not found at ${PSQL} — is DBngin Postgres 16.2 installed?"
+  exit 1
+fi
+
+log "Checking Postgres is up at ${PG_HOST}:${PG_PORT}..."
+if ! "${PG_ISREADY}" -h "${PG_HOST}" -p "${PG_PORT}" -q; then
+  log "Postgres is not accepting connections at ${PG_HOST}:${PG_PORT}."
+  log "Start DBngin's Postgres 16.2 instance and try again."
+  exit 1
+fi
+
+log "Dropping and recreating ${TEMPLATE_DB} as superuser ${PG_SUPERUSER}..."
+"${PSQL}" -h "${PG_HOST}" -p "${PG_PORT}" -U "${PG_SUPERUSER}" -d postgres \
+  -v ON_ERROR_STOP=1 -X -q <<SQL
+-- Clear the template flag first so DROP DATABASE is allowed.
+UPDATE pg_database SET datistemplate = FALSE WHERE datname = '${TEMPLATE_DB}';
+UPDATE pg_database SET datallowconn = TRUE  WHERE datname = '${TEMPLATE_DB}';
+
+-- Evict any lingering backends on the template DB.
+SELECT pg_terminate_backend(pid)
+  FROM pg_stat_activity
+ WHERE datname = '${TEMPLATE_DB}'
+   AND pid <> pg_backend_pid();
+
+DROP DATABASE IF EXISTS ${TEMPLATE_DB};
+CREATE DATABASE ${TEMPLATE_DB} OWNER ${OWNER_ROLE};
+SQL
+
+log "Applying Alembic schema to ${TEMPLATE_DB}..."
+
+if [[ -x "${REPO_ROOT}/.venv/bin/python" ]]; then
+  PYTHON="${REPO_ROOT}/.venv/bin/python"
+else
+  PYTHON="python3"
+fi
+
+(
+  cd "${REPO_ROOT}"
+  POSTGRES_URI="postgresql://${OWNER_ROLE}:${OWNER_PASSWORD}@${PG_HOST}:${PG_PORT}/${TEMPLATE_DB}" \
+    "${PYTHON}" scripts/db/init_postgres.py
+)
+
+log "Marking ${TEMPLATE_DB} as a Postgres template (datistemplate=TRUE, datallowconn=FALSE)..."
+"${PSQL}" -h "${PG_HOST}" -p "${PG_PORT}" -U "${PG_SUPERUSER}" -d postgres \
+  -v ON_ERROR_STOP=1 -X -q <<SQL
+UPDATE pg_database SET datistemplate = TRUE  WHERE datname = '${TEMPLATE_DB}';
+UPDATE pg_database SET datallowconn = FALSE WHERE datname = '${TEMPLATE_DB}';
+SQL
+
+log "Cloning ${E2E_DB} from ${TEMPLATE_DB}..."
+"${PSQL}" -h "${PG_HOST}" -p "${PG_PORT}" -U "${PG_SUPERUSER}" -d postgres \
+  -v ON_ERROR_STOP=1 -X -q <<SQL
+SELECT pg_terminate_backend(pid)
+  FROM pg_stat_activity
+ WHERE datname = '${E2E_DB}'
+   AND pid <> pg_backend_pid();
+
+DROP DATABASE IF EXISTS ${E2E_DB};
+CREATE DATABASE ${E2E_DB} TEMPLATE ${TEMPLATE_DB} OWNER ${OWNER_ROLE};
+SQL
+
+log "Done. Template ${TEMPLATE_DB} is baked; ${E2E_DB} is ready for the first e2e run."
+exit 0