Bug#1106560: modernize-sources also converts other packages' conffiles

Package: apt
Version: 2.6.1
Severity: normal
Tags: upstream
X-Debbugs-Cc: [email protected]

Hi,

Microsoft's VSCode repository still ships an old-style format file, as a
conffile. Running modernize-sources on this creates a non-working
configuration, which is one problem -- but this also touches a conffile
belonging to another package (which is technically a policy violation),
which will break the update when Microsoft starts shipping a deb822
style file.

Ideally, modernize-sources should ignore any existing files that are
registered with dpkg.

   Simon

-- Package-specific info:

-- (no /etc/apt/preferences present) --


-- (no /etc/apt/preferences.d/* present) --


-- (/etc/apt/sources.list present, but not submitted) --


-- (/etc/apt/sources.list.d/axelspace.sources present, but not submitted) --


-- (/etc/apt/sources.list.d/docker.list present, but not submitted) --


-- (/etc/apt/sources.list.d/earthly.list present, but not submitted) --


-- (/etc/apt/sources.list.d/sjr-fpga-bookworm.sources present, but not submitted) --


-- (/etc/apt/sources.list.d/sjr-kicad-bookworm.sources present, but not submitted) --


-- (/etc/apt/sources.list.d/sjr-misc-bookworm.sources present, but not submitted) --


-- (/etc/apt/sources.list.d/slack.list present, but not submitted) --


-- System Information:
Debian Release: 12.11
  APT prefers stable-security
  APT policy: (500, 'stable-security'), (500, 'proposed-updates'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 6.1.0-37-amd64 (SMP w/20 CPU threads; PREEMPT)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages apt depends on:
ii  adduser                 3.134
ii  debian-archive-keyring  2023.3+deb12u2
ii  gpgv                    2.2.40-1.1
ii  libapt-pkg6.0           2.6.1
ii  libc6                   2.36-9+deb12u10
ii  libgcc-s1               12.2.0-14+deb12u1
ii  libgnutls30             3.7.9-2+deb12u4
ii  libseccomp2             2.5.4-1+deb12u1
ii  libstdc++6              12.2.0-14+deb12u1
ii  libsystemd0             252.36-1~deb12u1

Versions of packages apt recommends:
ii  ca-certificates  20230311

Versions of packages apt suggests:
pn  apt-doc         <none>
ii  aptitude        0.8.13-5
ii  dpkg-dev        1.21.22
ii  gnupg           2.2.40-1.1
pn  powermgmt-base  <none>

-- no debconf information