z230

10 Backup/20 KanBoardDestroyAndRestore.py

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+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+import os
+import gzip
+import subprocess
+from pathlib import Path
+
+# ============================================================
+# CESTY K BINÁRKÁM (PORTABLE)
+# ============================================================
+
+PROJECT_ROOT = Path(__file__).resolve().parents[1]
+MYSQL = PROJECT_ROOT / "bin" / "mysql.exe"
+
+# ============================================================
+# 🔧 KONFIGURACE – UPRAV SI JEN TADY
+# ============================================================
+
+DUMP_FILE = Path(
+    r"U:\MySQLBackup\Kanboard\kanboard_kanboard_2026-01-28_09-53-50.sql.gz"
+)
+
+# ============================================================
+
+
+def load_dotenv(dotenv_path: Path) -> None:
+    if not dotenv_path.exists():
+        return
+    for line in dotenv_path.read_text(encoding="utf-8").splitlines():
+        line = line.strip()
+        if not line or line.startswith("#") or "=" not in line:
+            continue
+        k, v = line.split("=", 1)
+        os.environ.setdefault(k.strip(), v.strip().strip('"').strip("'"))
+
+
+def require_env(name: str) -> str:
+    v = os.getenv(name)
+    if not v:
+        raise SystemExit(f"Chybí proměnná {name} (dej ji do .env nebo env).")
+    return v
+
+
+def extract_db_name_from_dump(dump_file: Path) -> str:
+    """
+    Najde první 'CREATE DATABASE `xxx`' v dumpu
+    """
+    with gzip.open(dump_file, "rb") as f:
+        for raw in f:
+            line = raw.decode("utf-8", errors="ignore").strip()
+            if line.upper().startswith("CREATE DATABASE"):
+                return line.split("`")[1]
+    raise SystemExit("Nepodařilo se zjistit jméno DB z dumpu.")
+
+
+def database_exists(cnf_path: Path, db_name: str) -> bool:
+    """
+    Ověří existenci DB v MySQL
+    """
+    cmd = [
+        str(MYSQL),
+        f"--defaults-extra-file={cnf_path}",
+        "-N",
+        "-B",
+        "-e",
+        f"SHOW DATABASES LIKE '{db_name}';",
+    ]
+    p = subprocess.run(cmd, capture_output=True, text=True)
+    return db_name in (p.stdout or "")
+
+
+def main() -> None:
+    if not DUMP_FILE.exists():
+        raise SystemExit(f"Dump neexistuje: {DUMP_FILE}")
+
+    if not DUMP_FILE.name.endswith(".sql.gz"):
+        raise SystemExit("Dump musí končit na .sql.gz")
+
+    here = Path(__file__).resolve().parent
+    load_dotenv(here / ".env")
+
+    host = require_env("KB_MYSQL_HOST")
+    port = require_env("KB_MYSQL_PORT")
+    user = require_env("KB_MYSQL_USER")
+    password = require_env("KB_MYSQL_PASSWORD")
+
+    # dočasný mysql client config (bez hesla v CLI)
+    cnf_path = here / ".mysql_restore.cnf"
+    cnf_path.write_text(
+        "[client]\n"
+        f"host={host}\n"
+        f"port={port}\n"
+        f"user={user}\n"
+        f"password={password}\n",
+        encoding="utf-8"
+    )
+
+    tmp_sql = DUMP_FILE.with_suffix(".restore.tmp.sql")
+
+    try:
+        try:
+            os.chmod(cnf_path, 0o600)
+        except Exception:
+            pass
+
+        # 🔎 zjistíme jméno DB z dumpu
+        db_name = extract_db_name_from_dump(DUMP_FILE)
+        print(f"[INFO] Dump obsahuje databázi: {db_name}")
+
+        # 🛑 POJISTKA – DB už existuje
+        if database_exists(cnf_path, db_name):
+            raise SystemExit(
+                f"❌ STOP: Databáze '{db_name}' už v MySQL existuje.\n"
+                f"   Musíš ji NEJDŘÍVE ručně smazat (DROP DATABASE {db_name};)\n"
+                f"   a teprve pak znovu spustit restore."
+            )
+
+        print("[OK] Databáze v MySQL neexistuje → pokračuji v obnově")
+
+        # ====================================================
+        # 1) ROZBALENÍ DUMPU DO DOČASNÉHO SQL
+        # ====================================================
+        print("[INFO] Rozbaluji dump do dočasného SQL souboru")
+        with gzip.open(DUMP_FILE, "rb") as f_in, open(tmp_sql, "wb") as f_out:
+            f_out.write(f_in.read())
+
+        # ====================================================
+        # 2) RESTORE Z ČISTÉHO SQL
+        # ====================================================
+        mysql_cmd = [
+            str(MYSQL),
+            f"--defaults-extra-file={cnf_path}",
+            "--binary-mode=1",
+        ]
+
+        print("[OK] Spouštím restore z dočasného SQL")
+        with open(tmp_sql, "rb") as f_sql:
+            p = subprocess.run(mysql_cmd, stdin=f_sql)
+
+        if p.returncode != 0:
+            raise SystemExit(f"mysql import selhal (exit={p.returncode})")
+
+        print(f"[OK] Obnova databáze '{db_name}' dokončena.")
+
+    finally:
+        tmp_sql.unlink(missing_ok=True)
+        cnf_path.unlink(missing_ok=True)
+
+
+if __name__ == "__main__":
+    main()