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Groups > linux.debian.bugs.dist > #1305114

Bug#1144486: python3-apt: Equivalent of "upgrade --with-new-pkgs" missing

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Package: python3-apt
Version: 3.1.0
Severity: wishlist

The python binding to libapt-pkg does not offer any way to do the rough
equivalent of apt-get's "upgrade --with-new-pkgs".

The Cache.upgade method allows doing a "full/dist upgrade" or a
"partial/safe upgrade":

  Cache.upgrade(self, dist_upgrade: bool = False) -> None

That forwards the call to apt_pkg.DepCache.upgrade which is implemented
by PkgDepCacheUpgrade:

  static PyObject *PkgDepCacheUpgrade(PyObject *Self,PyObject *Args)
  {
     [...]
     char distUpgrade=0;
     if (PyArg_ParseTuple(Args,"|b",&distUpgrade) == 0)
        return 0;
     [...]
     if (distUpgrade)
        res = APT::Upgrade::Upgrade(*depcache, 0);
     else
        res = APT::Upgrade::Upgrade(*depcache, APT::Upgrade::FORBID_REMOVE_PACKAGES |
                                               APT::Upgrade::FORBID_INSTALL_NEW_PACKAGES);
     [...]
  }

What's missing is allowing python to call Upgrade with
FORBID_REMOVE_PACKAGES but without FORBID_INSTALL_NEW_PACKAGES
(pseudocode):

     int mode_flags = (upgrade_mode == FULL)
        ? 0
        : (upgrade_mode == WITH_NEW_PKGS)
           ? APT::Upgrade::FORBID_REMOVE_PACKAGES
           : APT::Upgrade::FORBID_REMOVE_PACKAGES |
             APT::Upgrade::FORBID_INSTALL_NEW_PACKAGES;
     res = APT::Upgrade::Upgrade(*depcache, mode_flags);

Plus the API adjustments to expose this feature.

-- System Information:
Debian Release: forky/sid
  APT prefers stable-security
  APT policy: (500, 'stable-security'), (500, 'unstable'), (500, 'testing'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 6.12.101+deb13-amd64 (SMP w/4 CPU threads; PREEMPT)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), LANGUAGE=en_GB:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages python3-apt depends on:
ii  distro-info-data   2026.07.30-1
ii  libapt-pkg7.0      3.3.3
ii  libc6              2.43-3
ii  libgcc-s1          16.2.0-1
ii  libstdc++6         16.2.0-1
ii  python-apt-common  3.1.0
ii  python3            3.14.6-1

Versions of packages python3-apt recommends:
ii  iso-codes    4.20.1-1
ii  lsb-release  12.1-2

Versions of packages python3-apt suggests:
ii  apt             3.3.3
pn  python-apt-doc  <none>

-- no debconf information

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Bug#1144486: python3-apt: Equivalent of "upgrade --with-new-pkgs" missing "astian" <astian@memeware.net> - 2026-08-15 21:00 +0200

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