Update gitignore

.gitignore

@@ -2,3 +2,4 @@ __pycache__
 .vscode
 devenv
 your_system_information.txt
+*.db

decorators.py

@@ -0,0 +1,43 @@
+from functools import wraps
+
+installed_packages = []
+
+
+def install_package(pkg):
+    if pkg not in installed_packages:
+        installed_packages.append(pkg)
+        print(f"Installed: {pkg}")
+    else:
+        print(f"Already installed: {pkg}")
+
+
+def needs_packages(packages):
+    def inner_decorator(function):
+        @wraps(function)
+        def execution_wrapper(*args, **kwargs):
+            [install_package(package) for package in packages]
+            return function(*args, **kwargs)
+
+        return execution_wrapper
+
+    return inner_decorator
+
+
+@needs_packages(['vim', 'calc'])
+def add(z1, z2):
+    return z1 + z2
+
+
+@needs_packages(['calc', 'sed'])
+def sub(z1, z2):
+    return z1 - z2
+
+
+@needs_packages(['calc'])
+def bla(z1, z2):
+    return z1 / z2
+
+
+print(add(1, 2))
+print(sub(1, 2))
+print(bla(1, 2))

modules/pkg-lister/__init__.py

@@ -0,0 +1,61 @@
+import argparse
+import sqlite3
+import subprocess
+
+# cmd = """dpkg-query -f '\{"package": "${Package}", "version": "${Version}", "arch": "${Architecture}", "source": "${Source}", "desc": "${binary:Synopsis}"\}\\n' -W"""
+
+cmd = """dpkg-query -f '${Package}\\t${Version}\\t${Architecture}\\t${Source}\\t${binary:Synopsis}\\n' -W"""
+db = sqlite3.connect("pkg-list.db")
+cur = db.cursor()
+
+parser = argparse.ArgumentParser()
+parser.add_argument("-s", "--search")
+args = parser.parse_args()
+
+
+def load_list():
+    global cur
+    cur.execute("DROP TABLE IF EXISTS Packages")
+    cur.execute(
+        """CREATE TABLE 
+            Packages(
+                pkg TEXT PRIMARY KEY, 
+                version TEXT NOT NULL, 
+                architecture TEXT NOT NULL, 
+                parent TEXT, 
+                description TEXT NOT NULL
+            )"""
+    )
+    packages = subprocess.check_output(cmd, shell=True).decode("UTF-8")
+    for line in packages.splitlines():
+        name, version, arch, source, desc = line.split("\t")
+        cur.execute(
+            "INSERT OR REPLACE INTO Packages VALUES (?,?,?,?,?)",
+            (name, version, arch, source, desc)
+        )
+    db.commit()
+
+
+def list_packages():
+    global cur
+    results = cur.execute("SELECT * FROM Packages")
+    for res in results.fetchall():
+        print(res)
+
+
+def is_installed(pkg):
+    global cur
+    results = cur.execute("SELECT version FROM Packages WHERE pkg = ?", (pkg,))
+    return len(results.fetchall()) > 0
+
+
+def what_does(pkg):
+    global cur
+    results = cur.execute("SELECT description FROM Packages WHERE pkg = ?", (pkg,)).fetchone()
+    return results[0] if results and len(results) > 0 else "Package was not found"
+
+
+load_list()
+# list_packages()
+# print(is_installed("sed"))
+print(f"{args.search} is installed") if is_installed(args.search) else print(f"{args.search} is not installed")