rxvt-unicode: fix terminfo for minimal install

[lemmi]

System

• package:
  • rxvt-unicode-terminfo-9.22_9

Expected behavior

/usr/share/terminfo/r/ to be populated

Actual behavior

• Install script fails

Steps to reproduce the behavior

• Install void with base-minimal
• Install rxvt-unicode-terminfo
• use urxvt from remote host (ssh, run that minimal install in a container) and set TERM=rxvt-unicode-256color
• Check weird behaviour:
  • can't use backspace in terminal
  • htop won't work
  • ...

So rxvt-unicode-terminfo ships with this install script:

case "${ACTION}" in
post)
	tic -s usr/share/terminfo/r/rxvt-unicode.terminfo
	;;
esac

It uses tic, but that's contained in ncurses, which is not a dependency of rxvt-unicode-terminfo.
The obvious solution is to add ncurses as a dependency to rxvt-unicode-terminfo. But I wanted to ask If we can just compile the files during build and get rid of the scripts.

[maxice8]

please check #9633

[maxice8]

We can certainly do that, Alpine and Arch Linux do it.

[Duncaen]

I think ncurses should be a dependency of base-minimal, like it is in base-system.

[am11]

I think ncurses should be a dependency of base-minimal, like it is in base-system.

Yes please. At least, nano and bash do not function properly in Void's docker container without ncurses present.

Bash:
It took me a while to figure out why pressing [BACKSPACE] was printing [SPACE] in the interactive shell and ←, → arrow keys were not doing anything.

Nano:
in a fresh VoidLinux docker container, after installing nano when i ran it, it reported:
Error opening terminal: xterm..

Just installing ncurses fixed both of these issues. (everything else mentioned on google, check the output of $TERM, output of stty -a etc. was in accord; I have tested it couple of times just to be sure). :)