file conflict between python3-path and python3-path.py

[Andreas Hasenack]

This is not strictly an amulet bug, but on a dependency that only amulet requires: python3-path.py.

There is a conflict in xenial when installing python3-amulet:
root@nsn7:~# apt-get install python3-amulet
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following additional packages will be installed:
  libpython3-all-dev libpython3-dev libpython3.5-dev python3-all python3-all-dev python3-charmworldlib python3-dev python3-path python3-path.py python3.5-dev
The following NEW packages will be installed:
  libpython3-all-dev libpython3-dev libpython3.5-dev python3-all python3-all-dev python3-amulet python3-charmworldlib python3-dev python3-path python3-path.py
  python3.5-dev
0 upgraded, 11 newly installed, 0 to remove and 0 not upgraded.
Need to get 37.8 MB of archives.
After this operation, 54.3 MB of additional disk space will be used.
Do you want to continue? [Y/n]
Get:1 http://br.archive.ubuntu.com/ubuntu xenial/main amd64 libpython3.5-dev amd64 3.5.1-6ubuntu2 [37.3 MB]
Get:2 http://ppa.launchpad.net/juju/stable/ubuntu xenial/main amd64 python3-charmworldlib all 0.4.2-0ubuntu1~ubuntu16.04.1~ppa1 [5,968 B]
Get:3 http://ppa.launchpad.net/juju/stable/ubuntu xenial/main amd64 python3-path.py all 7.2-1ubuntu2~ubuntu16.04.1~ppa1 [23.9 kB]
Get:4 http://ppa.launchpad.net/juju/stable/ubuntu xenial/main amd64 python3-amulet all 1.12.1-0ubuntu1~ubuntu16.04.1~ppa1 [15.7 kB]
Get:5 http://br.archive.ubuntu.com/ubuntu xenial/main amd64 libpython3-dev amd64 3.5.1-1ubuntu2 [6,956 B]
Get:6 http://br.archive.ubuntu.com/ubuntu xenial/main amd64 libpython3-all-dev amd64 3.5.1-1ubuntu2 [1,004 B]
Get:7 http://br.archive.ubuntu.com/ubuntu xenial/main amd64 python3-all amd64 3.5.1-1ubuntu2 [984 B]
Get:8 http://br.archive.ubuntu.com/ubuntu xenial/main amd64 python3.5-dev amd64 3.5.1-6ubuntu2 [413 kB]
Get:9 http://br.archive.ubuntu.com/ubuntu xenial/main amd64 python3-dev amd64 3.5.1-1ubuntu2 [1,192 B]
Get:10 http://br.archive.ubuntu.com/ubuntu xenial/main amd64 python3-all-dev amd64 3.5.1-1ubuntu2 [1,006 B]
Get:11 http://br.archive.ubuntu.com/ubuntu xenial/universe amd64 python3-path all 8.1.2+dfsg-1 [24.7 kB]
Fetched 37.8 MB in 19s (1,948 kB/s)
Selecting previously unselected package libpython3.5-dev:amd64.
(Reading database ... 244205 files and directories currently installed.)
Preparing to unpack .../libpython3.5-dev_3.5.1-6ubuntu2_amd64.deb ...
Unpacking libpython3.5-dev:amd64 (3.5.1-6ubuntu2) ...
Selecting previously unselected package libpython3-dev:amd64.
Preparing to unpack .../libpython3-dev_3.5.1-1ubuntu2_amd64.deb ...
Unpacking libpython3-dev:amd64 (3.5.1-1ubuntu2) ...
Selecting previously unselected package libpython3-all-dev:amd64.
Preparing to unpack .../libpython3-all-dev_3.5.1-1ubuntu2_amd64.deb ...
Unpacking libpython3-all-dev:amd64 (3.5.1-1ubuntu2) ...
Selecting previously unselected package python3-all.
Preparing to unpack .../python3-all_3.5.1-1ubuntu2_amd64.deb ...
Unpacking python3-all (3.5.1-1ubuntu2) ...
Selecting previously unselected package python3.5-dev.
Preparing to unpack .../python3.5-dev_3.5.1-6ubuntu2_amd64.deb ...
Unpacking python3.5-dev (3.5.1-6ubuntu2) ...
Selecting previously unselected package python3-dev.
Preparing to unpack .../python3-dev_3.5.1-1ubuntu2_amd64.deb ...
Unpacking python3-dev (3.5.1-1ubuntu2) ...
Selecting previously unselected package python3-all-dev.
Preparing to unpack .../python3-all-dev_3.5.1-1ubuntu2_amd64.deb ...
Unpacking python3-all-dev (3.5.1-1ubuntu2) ...
Selecting previously unselected package python3-path.
Preparing to unpack .../python3-path_8.1.2+dfsg-1_all.deb ...
Unpacking python3-path (8.1.2+dfsg-1) ...
Selecting previously unselected package python3-charmworldlib.
Preparing to unpack .../python3-charmworldlib_0.4.2-0ubuntu1~ubuntu16.04.1~ppa1_all.deb ...
Unpacking python3-charmworldlib (0.4.2-0ubuntu1~ubuntu16.04.1~ppa1) ...
Preparing to unpack .../python3-path.py_7.2-1ubuntu2~ubuntu16.04.1~ppa1_all.deb ...
Unpacking python3-path.py (7.2-1ubuntu2~ubuntu16.04.1~ppa1) ...
dpkg: error processing archive /var/cache/apt/archives/python3-path.py_7.2-1ubuntu2~ubuntu16.04.1~ppa1_all.deb (--unpack):
 trying to overwrite '/usr/lib/python3/dist-packages/test_path.py', which is also in package python3-path 8.1.2+dfsg-1
Selecting previously unselected package python3-amulet.
Preparing to unpack .../python3-amulet_1.12.1-0ubuntu1~ubuntu16.04.1~ppa1_all.deb ...
Unpacking python3-amulet (1.12.1-0ubuntu1~ubuntu16.04.1~ppa1) ...
Processing triggers for man-db (2.7.5-1) ...
Errors were encountered while processing:
 /var/cache/apt/archives/python3-path.py_7.2-1ubuntu2~ubuntu16.04.1~ppa1_all.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)
root@nsn7:~#

python3-path.py comes from the juju stable ppa:

root@nsn7:~# apt-cache policy python3-path python3-path.py python3-amulet
python3-path:
  Installed: 8.1.2+dfsg-1
  Candidate: 8.1.2+dfsg-1
  Version table:
 *** 8.1.2+dfsg-1 500
        500 http://br.archive.ubuntu.com/ubuntu xenial/universe amd64 Packages
        500 http://br.archive.ubuntu.com/ubuntu xenial/universe i386 Packages
        100 /var/lib/dpkg/status
python3-path.py:
  Installed: (none)
  Candidate: 7.2-1ubuntu2~ubuntu16.04.1~ppa1
  Version table:
     7.2-1ubuntu2~ubuntu16.04.1~ppa1 500
        500 http://ppa.launchpad.net/juju/stable/ubuntu xenial/main amd64 Packages
        500 http://ppa.launchpad.net/juju/stable/ubuntu xenial/main i386 Packages
python3-amulet:
  Installed: 1.12.1-0ubuntu1~ubuntu16.04.1~ppa1
  Candidate: 1.12.1-0ubuntu1~ubuntu16.04.1~ppa1
  Version table:
 *** 1.12.1-0ubuntu1~ubuntu16.04.1~ppa1 500
        500 http://ppa.launchpad.net/juju/stable/ubuntu xenial/main amd64 Packages
        500 http://ppa.launchpad.net/juju/stable/ubuntu xenial/main i386 Packages
        100 /var/lib/dpkg/status

[Marco Ceppi (marcoceppi)]

Fixed in 1.12.1-0ubuntu3~ubuntu16.04.1~ppa1