set envvar for apt

tests/test_apt.py

@@ -6,6 +6,7 @@ Check updates, apt state and unattended upgrade config.
 """
 
 import apt_pkg
+import os
 from pathlib import Path
 import requests
 import sys
@@ -27,6 +28,9 @@ from utils_lib.os import line_in_file  # noqa: E402
 def main():
     warnings = 0
     errors = 0
+
+    os.environ["DEBIAN_FRONTEND"] = "noninteractive"
+    os.environ["PATH"] = "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
     apt = Apt(update=True)
 
     print("Checking APT state:")

utils_lib/apt.py

@@ -4,6 +4,8 @@
 A wrapper of apt module that is actually usable.
 """
 
+import os
+
 import utils as u
 
 try:
@@ -24,6 +26,8 @@ class Apt:
     # upgradable_packages: list
 
     def __init__(self, update: bool = False):
+        os.environ["DEBIAN_FRONTEND"] = "noninteractive"
+        os.environ["PATH"] = "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
         self.cache = self.get_cache(update)
         self.packages = self.get_packages()
         self._installed_packages = self.get_installed_packages()