playerctl ( mpris ) does not work with musikcube on systemd-free distribution

I tried to use playerctl to control musikcube playback, but on Artix musikcube didn't provide any mpris interface. Muiskcube mpris plugin supports libelogind instead of libsystemd but you need to replace it manually.

Installation of musikcube with mpris support on systemd-free distribution (originals of changed files will be saved as <filename>.<extention>.bak):

Install musikcube from source:

git clone https://github.com/clangen/musikcube.git --recursive 
cd musikcube

Replace libsystemd requirement with libelogind:

sed -i.bak 's/libsystemd/libelogind/g' src/plugins/mpris/CMakeLists.txt

optional:

sed -i.bak 's/libsystemd-dev/libelogind/g' script/install-deps.sh

Build according to this instruction: Install dependencies.
```
cmake -G "Unix Makefiles" .
make
```
Troubleshooting:

3.1 itemListMap

Solution: replace itemListMap with itemMap in src/plugins/taglib_plugin/TaglibMetadataReader.cpp:
```
   sed -i.bak 's/itemListMap/itemMap/g' src/plugins/taglib_plugin/TaglibMetadataReader.cpp
   make
```
3.2 <ncursesw/curses.h> / <ncursesw/panel.h>

Solution: According to the instruction "you should invoke CMake with the -DNO_NCURSESW flag as follows: cmake -DNO_NCURSESW . instead of the more standard cmake . ", but it gives error:
```
   CMake Error: Parse error in command line argument: NO_NCURSESW
   Should be: VAR:type=value
```
so you should remove ncursesw/ from #include:
```
   sed -i.bak 's/ncursesw\///g' src/musikcube/cursespp/cursespp/curses_config.h 
   make   
```
After make completed:
```
sudo make install      
```

After installation libmpris.so may not appear in /usr/local/share/musikcube/plugins or /usr/share/musikcube/plugins. In this case:

sudo cp bin/plugins/libmpris.so /usr/local/share/musikcube/plugins 
sudo cp bin/plugins/libmpris.so /usr/share/musikcube/plugins 
reboot

You can check if mpris plugin is running in musikcube: settings>configure plugins - it should contain string:

[x] MPRIS interface (libmpris.so)  ...

That's it. I hope this helps someone. Also share improvements of my instruction if you faced any other issues.

clangen / musikcube

playerctl ( mpris ) does not work with musikcube on systemd-free distribution #668