apt does not work with given convig files in new format

[Thomas Schweikle]

assume /etc/apt/sources.list.d/somerepo.list:

Types: deb
URIs: https://repo.vivaldi.com/stable/deb/
Suites: stable
Components: main
Architectures: amd64
Signed-By: /etc/apt/trusted.gpg.d/33EAAB8E.gpg /etc/apt/trusted.gpg.d/4218647E.gpg

Then 'apt update' will produce:

# apt update
E: Type 'Types:' is not known on line 4 in source list /etc/apt/sources.list.d/vivaldi.list
E: The list of sources could not be read.

A new apt version is available. Would be nice to upgrade. At the moment "man sources.list" does describe a file format not accepted by apt in sources.list-files.

ProblemType: Bug
DistroRelease: Ubuntu 23.10
Package: apt 2.7.3
ProcVersionSignature: Ubuntu 6.5.0-10.10-generic 6.5.3
Uname: Linux 6.5.0-10-generic x86_64
NonfreeKernelModules: zfs
ApportVersion: 2.27.0-0ubuntu5
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: XFCE
Date: Sat Nov 4 23:51:50 2023
InstallationDate: Installed on 2021-12-11 (693 days ago)
InstallationMedia: Xubuntu 21.10 "Impish Indri" - Release amd64 (20211012)
ProcEnviron:
 LANG=de_DE.UTF-8
 LANGUAGE=de_DE
 PATH=(custom, no user)
 SHELL=/bin/bash
 TERM=xterm-256color
SourcePackage: apt
UpgradeStatus: No upgrade log present (probably fresh install)

[Julian Andres Klode (juliank)]

As the documentation says, the file name must end in .sources