feat(package-list-parser): improve error messsages for unsupported distros (#1413)

* fixes #1412

Author: BreadGenie

cve_bin_tool/package_list_parser/__init__.py

@@ -183,7 +183,16 @@ def check_file(self):
                 raise EmptyTxtError(input_file)
 
         if not input_file.endswith("requirements.txt"):
-            if distro.id() in DEB_DISTROS:
+            if distro.id() not in SUPPORTED_DISTROS:
+                LOGGER.warning(
+                    f"Package list support only available for {','.join(SUPPORTED_DISTROS)}!"
+                )
+                with ErrorHandler(mode=error_mode):
+                    raise InvalidListError(
+                        f"{distro.id().capitalize()} is not supported"
+                    )
+
+            elif distro.id() in DEB_DISTROS:
                 # Simulate installation on Debian based system using apt-get to check if the file is valid
                 output = run(
                     ["xargs", "-a", input_file, "apt-get", "install", "-s"],