musicserver apt install check error

[bernhard]

the musicserver backend checks if the package "mt-daapd" is installed.

But the command throws an exception
SategaFault: <Fault 10005: 'Error reading output from command: Return code: 1 Command: dpkg -l mt-daapd | grep mt-daapd stderr: No package fround that matches mt-daapd '>

The output from
berni@zero:~$ apt-cache search mt-daapd
mt-daapd - iTunes-compatible DAAP server

berni@zero:~$ dpkg -l mt-daapd
No package found that matches mt-daapd
berni@zero:~$

(error message of dpkg translated into english)

For example the php5 package (which is not installed)

berni@zero:~$ dpkg -l php5
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Installed/Config-f/Unpacked/Failed-cfg/Half-inst/t-aWait/T-pend
|/ Err?=(none)/Hold/Reinst-required/X=both-problems (Status,Err: uppercase=bad)
||/ Name Version Beschreibung
+++-==============-==============-============================================
un php5 <keine> (keine Beschreibung vorhanden)

[bernhard (bernhardredl)]

ok imho there are 2 possibilities:

A: just use a try catch

B: Use dpkg -s instead.

berni@zero:~$ dpkg -s apache2
Package: apache2
Status: install ok installed
Priority: optional
Section: web
Installed-Size: 100
Maintainer: Ubuntu Core Developers <email address hidden>
Architecture: all
...
berni@zero:~$

[Svein Hansen (sveinhansen)]

I'm not able to re-produce this on my system. I also do not get this error on a fresh ubuntu server install.

1) Could you please try to to dpkg -s mt-daadp. Does that work as with your apache example above?

2) Also, please try to do:

sudo apt-get purge mt-daapd
sudo apt-get clean
sudo apt-get autoclean

Then try installing the music server from the configuration page again.

Thanks!

[Svein Hansen (sveinhansen)]

Investigating

[bernhard (bernhardredl)]

ok the strange thing is that dpkg -i mt-daapd does also not work
> package / file not found

but i have an idea. Is it possible that apt-cache and dpkg maintan different packages infos?

For example if you search with apt-cache search php
you get about 100 results with php in the package name.

If you do an dpkg -l *php* you just get 7 results.
maybe dpkg -l is the false way to check if a package is installed.

i added a patch which solves the problem

[bernhard (bernhardredl)]

any updates on this bug ?

[bernhard (bernhardredl)]

fixed the bug by implementing the patch

[bernhard (bernhardredl)]

thus we dont have any release version