feat: add feature to update cachyOS in the background

lib/package_manager.py

@@ -0,0 +1,90 @@
+import subprocess
+import logging
+from dataclasses import dataclass, field
+from pathlib import Path
+from typing import Optional
+
+logger = logging.getLogger(__name__)
+
+PACMAN_LOCK = Path("/var/lib/pacman/db.lck")
+
+
+@dataclass
+class Package:
+    name: str
+    old_version: str
+    new_version: str
+
+
+@dataclass
+class InstallResult:
+    success: bool
+    installed: list = field(default_factory=list)
+    failed: list = field(default_factory=list)
+    error: Optional[str] = None
+
+
+def is_pacman_locked() -> bool:
+    return PACMAN_LOCK.exists()
+
+
+def check_updates() -> list[Package]:
+    """Vérifie les mises à jour disponibles via checkupdates (sans droits root)."""
+    result = subprocess.run(
+        ["checkupdates"],
+        capture_output=True, text=True, timeout=120
+    )
+    packages = []
+    for line in result.stdout.strip().splitlines():
+        parts = line.split()
+        # Format attendu : "nom ancienne_version -> nouvelle_version"
+        if len(parts) >= 4 and parts[2] == "->":
+            packages.append(Package(
+                name=parts[0],
+                old_version=parts[1],
+                new_version=parts[3],
+            ))
+    return packages
+
+
+def download_packages(names: list[str]) -> bool:
+    """Télécharge les paquets dans le cache sans les installer."""
+    if not names:
+        return True
+    result = subprocess.run(
+        ["pacman", "-Syw", "--noconfirm", "--noprogressbar"] + names,
+        capture_output=True, text=True, timeout=600
+    )
+    if result.returncode != 0:
+        logger.error(f"Téléchargement échoué : {result.stderr[-500:]}")
+        return False
+    return True
+
+
+def sync_db() -> bool:
+    """Synchronise la base de données des paquets."""
+    result = subprocess.run(
+        ["pacman", "-Sy", "--noconfirm"],
+        capture_output=True, text=True, timeout=120
+    )
+    return result.returncode == 0
+
+
+def install_packages(names: list[str]) -> InstallResult:
+    """Installe des paquets spécifiques depuis le cache."""
+    if not names:
+        return InstallResult(success=True)
+
+    result = subprocess.run(
+        ["pacman", "-S", "--noconfirm", "--needed", "--noprogressbar"] + names,
+        capture_output=True, text=True, timeout=600
+    )
+
+    if result.returncode == 0:
+        return InstallResult(success=True, installed=names)
+    else:
+        return InstallResult(
+            success=False,
+            failed=names,
+            error=result.stderr[-800:],
+        )