New review comment by classabbyamp on void-packages repository

https://github.com/void-linux/void-packages/pull/50713#discussion_r1629465388

Comment:
jars are archives, so we can do shenanigans:
```
bsdtar xOf lib/app-client.jar entry.desktop
[Desktop Entry]
Version=1.0
Type=Application
Name=$NAME$
Icon=$ICON$
Exec=$SCRIPT$ %f
Comment=$COMMENT$
Categories=Development;IDE;
Terminal=false
StartupWMClass=$WM_CLASS$
StartupNotify=true
```
Use this as a base. run the application to grab what it replaces the `$templates$` with.

e.g.:
```bash
post_extract() {
	bsdtar xf lib/app-client.jar entry.desktop
}

post_patch() {
	vsed -i -e 's/$NAME$/whatever/; s/$ICON$/whatever/; ...' entry.desktop
}

do_install() {
	vinstall entry.desktop 644 usr/share/applications idea-ultimate.desktop
}
```