Upgrading a list of packages from local .deb files

[Andrey Agenosov]

Hello, I have the issue with upgrading our product on Debian-based systems.

We have already installed packages of the version, for example, 2.0. There are several packages and some of it depend of the other.

When I'm trying to **upgrade the product** from the version 2.0 to the version 2.1, **passing a list of .deb packages, the error occurs because of an unresolved dependency**.

Below there is a *yml*-fragment to illustrate what I do:

    - name: Installing packages [apt]
    apt:
      deb="{{ packages_to_install }}"
      state=present
      update_cache=yes
    when: ansible_pkg_mgr == "apt"

I tried to find out what's going on under the hood by debugging the Ansible's apt module:

 - when iterating over the list of .deb files, for each file there is a check of the package's version with version of the already installed package with the same name
 - if versions are differ, there is a call to the *apt.debfile.DebPackage.check()* function, which in my case returns false (this is due to the fact that in case of installing a newer version of a package there will be a dependency conflict for another package, which is also part of our product).

**In case of yum, this case passes successfully** - the Ansible's yum module supports **thansactional update from local .rpm files**.

What will be the right solution for Debian?
Perform full deinstallation of the product before installing the new version? Or should I patch the Ansible's apt module?