[PKG-Openstack-devel] Bug#886847: python3-ldap, python3-pyldap: error when trying to install together

[Willem van den Akker]

On Wed, 2018-01-10 at 14:37 +0100, Andreas Beckmann wrote:
> Package: python3-ldap,python3-pyldap
> Severity: serious
> User: treinen at debian.org
> Usertags: edos-file-overwrite
> Control: found -1 3.0.0~b3-1
> Control: found -1 2.4.25.1-2
> 
> Hi,
> 
> automatic installation tests of packages that share a file and at the
> same time do not conflict by their package dependency relationships has
> detected the following problem:
> 
>   Selecting previously unselected package python3-pyldap.
>   Preparing to unpack .../python3-pyldap_2.4.25.1-2+b1_amd64.deb ...
>   Unpacking python3-pyldap (2.4.25.1-2+b1) ...
>   dpkg: error processing archive /var/cache/apt/archives/python3-pyldap_2.4.25.1-2+b1_amd64.deb (--unpack):
>    trying to overwrite '/usr/lib/python3/dist-packages/_ldap.cpython-36m-x86_64-linux-gnu.so', which is also in package python3-ldap 3.0.0~b3-1
>   Errors were encountered while processing:
>    /var/cache/apt/archives/python3-pyldap_2.4.25.1-2+b1_amd64.deb
> 
> 
> This is a serious bug as it makes installation fail, and violates
> sections 7.6.1 and 10.1 of the policy. An optimal solution would
> consist in only one of the packages installing that file, and renaming
> or removing the file in the other package. Depending on the
> circumstances you might also consider Replace relations or file
> diversions. If the conflicting situation cannot be resolved then, as a
> last resort, the two packages have to declare a mutual
> Conflict. Please take into account that Replaces, Conflicts and
> diversions should only be used when packages provide different
> implementations for the same functionality.
> 
> Here is a list of files that are known to be shared by both packages
> (according to the Contents file for sid/amd64, which may be
> slightly out of sync):
> 
> usr/lib/python3/dist-packages/_ldap.cpython-36m-x86_64-linux-gnu.so
> usr/lib/python3/dist-packages/ldap/__init__.py
> usr/lib/python3/dist-packages/ldap/async.py
> usr/lib/python3/dist-packages/ldap/cidict.py
> usr/lib/python3/dist-packages/ldap/compat.py
> usr/lib/python3/dist-packages/ldap/controls/__init__.py
> usr/lib/python3/dist-packages/ldap/controls/deref.py
> usr/lib/python3/dist-packages/ldap/controls/libldap.py
> usr/lib/python3/dist-packages/ldap/controls/openldap.py
> usr/lib/python3/dist-packages/ldap/controls/ppolicy.py
> usr/lib/python3/dist-packages/ldap/controls/psearch.py
> usr/lib/python3/dist-packages/ldap/controls/pwdpolicy.py
> usr/lib/python3/dist-packages/ldap/controls/readentry.py
> usr/lib/python3/dist-packages/ldap/controls/sessiontrack.py
> usr/lib/python3/dist-packages/ldap/controls/simple.py
> usr/lib/python3/dist-packages/ldap/dn.py
> usr/lib/python3/dist-packages/ldap/extop/__init__.py
> usr/lib/python3/dist-packages/ldap/extop/dds.py
> usr/lib/python3/dist-packages/ldap/filter.py
> usr/lib/python3/dist-packages/ldap/functions.py
> usr/lib/python3/dist-packages/ldap/ldapobject.py
> usr/lib/python3/dist-packages/ldap/logger.py
> usr/lib/python3/dist-packages/ldap/modlist.py
> usr/lib/python3/dist-packages/ldap/resiter.py
> usr/lib/python3/dist-packages/ldap/sasl.py
> usr/lib/python3/dist-packages/ldap/schema/__init__.py
> usr/lib/python3/dist-packages/ldap/schema/models.py
> usr/lib/python3/dist-packages/ldap/schema/subentry.py
> usr/lib/python3/dist-packages/ldap/schema/tokenizer.py
> usr/lib/python3/dist-packages/ldap/syncrepl.py
> usr/lib/python3/dist-packages/ldapurl.py
> usr/lib/python3/dist-packages/ldif.py
> 
> 
> This bug is assigned to both packages. If you, the maintainers of
> the two packages in question, have agreed on which of the packages will
> resolve the problem please reassign the bug to that package. You may
> also register in the BTS that the other package is affected by the bug.
> 
> Cheers,
> 
> Andreas
> 
> PS: for more information about the detection of file overwrite errors
> of this kind see https://qa.debian.org/dose/file-overwrites.html

It looks like the fork python3-pyldap is decprecated and merged back
into python-ldap [1].
My suggestion is to make a transitional package for python3-pyldap
which installs python-ldap.

/Willem

[1] https://github.com/pyldap/pyldap/