fempkg 1.3.3 core update

db.py

@@ -0,0 +1,49 @@
+#!/usr/bin/env python3
+# fempkg - a simple package manager
+# Copyright (C) 2025 Gabriel Di Martino
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+import json, os
+from pathlib import Path
+
+DB_PATH = "/var/lib/fempkg/db.json"
+Path(os.path.dirname(DB_PATH)).mkdir(parents=True, exist_ok=True)
+
+def load_db():
+    if os.path.exists(DB_PATH):
+        with open(DB_PATH, "r") as f:
+            return json.load(f)
+    return {"installed": {}}
+
+def save_db(db):
+    with open(DB_PATH, "w") as f:
+        json.dump(db, f, indent=2)
+
+def register_package(name, version, db=None):
+    if db is None:
+        db = load_db()
+    db["installed"][name] = version
+    save_db(db)
+    print(f"Registered: {name}-{version}")
+
+def is_installed(name, version=None, db=None):
+    if db is None:
+        db = load_db()
+    installed_ver = db["installed"].get(name)
+    if installed_ver is None:
+        return False
+    if version:
+        return installed_ver == version
+    return True
+