ports-mgmt/pkg installs unneeded packages

[Miroslav Lachman]

Sometimes (very often in my case with about 20 machines) "pkg install" 
or "pkg upgrade" installed some packages which were not needed and 
running "pkg autoremove" imediately after previsou upgrade / install 
command just uninstall those packages.

This is simple example from today. I just need to install "pgtop", along 
with dependencies "libnghttp2" were also installed:



root at fido ~/# pkg install pgtop
Updating codelab repository catalogue...
Fetching meta.txz: 100%    820 B   0.8kB/s    00:01
Fetching packagesite.txz: 100%  136 KiB 139.5kB/s    00:01
Processing entries: 100%
codelab repository update completed. 470 packages processed.
Updating e2efa repository catalogue...
Fetching meta.txz: 100%    820 B   0.8kB/s    00:01
Fetching packagesite.txz: 100%   37 KiB  37.6kB/s    00:01
Processing entries: 100%
e2efa repository update completed. 114 packages processed.
All repositories are up to date.
The following 4 package(s) will be affected (of 0 checked):

New packages to be INSTALLED:
         pgtop: 0.05_3 [e2efa]
         libnghttp2: 1.22.0 [codelab]
         p5-DBI: 1.636_1 [e2efa]
         p5-DBD-Pg: 3.6.2 [e2efa]

Number of packages to be installed: 4

The process will require 3 MiB more space.
977 KiB to be downloaded.

Proceed with this action? [y/N]: y
[1/4] Fetching pgtop-0.05_3.txz: 100%   24 KiB  24.9kB/s    00:01
[2/4] Fetching libnghttp2-1.22.0.txz: 100%  105 KiB 107.1kB/s    00:01
[3/4] Fetching p5-DBI-1.636_1.txz: 100%  685 KiB 701.6kB/s    00:01
[4/4] Fetching p5-DBD-Pg-3.6.2.txz: 100%  163 KiB 166.6kB/s    00:01
Checking integrity... done (0 conflicting)
[1/4] Installing p5-DBI-1.636_1...
[1/4] Extracting p5-DBI-1.636_1: 100%
[2/4] Installing p5-DBD-Pg-3.6.2...
[2/4] Extracting p5-DBD-Pg-3.6.2: 100%
[3/4] Installing pgtop-0.05_3...
[3/4] Extracting pgtop-0.05_3: 100%
[4/4] Installing libnghttp2-1.22.0...
Extracting libnghttp2-1.22.0: 100%


But nobody needs "libnghttpd2"

root at fido ~/# pkg info -r -d libnghttp2
libnghttp2-1.22.0


root at fido ~/# pkg autoremove
Checking integrity... done (0 conflicting)
Deinstallation has been requested for the following 1 packages:

Installed packages to be REMOVED:
         libnghttp2-1.22.0

Number of packages to be removed: 1

Proceed with deinstalling packages? [y/N]: y
[1/1] Deinstalling libnghttp2-1.22.0...
[1/1] Deleting files for libnghttp2-1.22.0: 100%


Similar issue was encountered on last "pkg upgrade" on almost all our 
machines where "libarchive" was installed and immediately deleted by 
"pkg autoremove".

We are using own Poudriere repo, FreeBSD 10.3, pkg 1.10.1

Let me know how can I debug this issue and I will provide more details.

I created PR https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=220049

Miroslav Lachman