UT99 ImprovedMakePKG

launch.sh

#!/bin/bash
cd "/opt/gog/gog-unreal-tournament-goty/System" && ./ut-bin

PKGBUILD

# Maintainer: Zacharias Knudsen <zachasme@gmail.com>
pkgname=gog-unreal-tournament-goty
pkgver=2.0.0.5
pkgrel=4
pkgdesc="Unreal Tournament (99): Game of the Year Edition. GOG Version."
arch=('x86_64')
url="https://www.gog.com/game/unreal_tournament_goty"
license=('custom')
depends=('lib32-sdl'
         'lib32-libgl')
makedepends=('innoextract')
source=("setup_ut_goty_$pkgver.exe::gogdownloader://unreal_tournament_goty/en1installer0"
        "https://github.com/OldUnreal/UnrealTournamentPatches/releases/download/v469a/OldUnreal-UTPatch469a-Linux.tar.bz2"
        "gog-unreal-tournament-goty"
	"launch.sh"
	"UT99.desktop")
noextract=("ut99v451-linux..tar.gz")
sha256sums=("4cc257d54d97659c5062f2bf186d0a8c6959561d11e42d8fcf2eac07f1926803"
            "d521a8339b80a4c86019c3648fb55cfc29edffeec73047ceb72784b159cc84f1"
            "2b70aa7a20d5b1fbfaf9561bd3cfc8c1d0f0dee2212b3914aed30a7c75e40566"
	    "0d22d3676808a7c9ca133d329571e735ed9944828ca2f8ac2c397b1bd1da87a5"
	    "1bc457392bafeae8a8f59795fd5a201087c75f855853dc6061e3a11a32a494b5")
DLAGENTS+=("gogdownloader::/usr/bin/echo %u Download the GOG file to \"$PWD\" or set up a gogdownloader:// DLAGENT.")

prepare() {
  # extract gog installer
  innoextract -em -d $srcdir setup_ut_goty_${pkgver}.exe
  # extract extra linux files
  tar -xf OldUnreal-UTPatch469a-Linux.tar.bz2 -C app
  # copy launcher and desktop file
  cp launch.sh app
  cp UT99.desktop app
    
  # To put extra content (extra levels/mods) into the game create an addons folder next to the PKGBUILD.
  # Whatever is in there will get copied to the root of the game's directory.
  # If nothing found we will ignore the error
  cp -r addons/* app 2>/dev/null || :
}

package() {
  # make destination directory
  mkdir -p $pkgdir/opt/gog/$pkgname
  # copy game files
  cp -r app/* $pkgdir/opt/gog/$pkgname
  # fix permissions
  chmod 777 -R $pkgdir/opt/gog/$pkgname
  # copy runner to /usr/bin
  install -D -m 755 $pkgname $pkgdir/usr/bin/$pkgname
  # copy desktop file to /usr/share/applications
  mkdir -p $pkgdir/usr/share/applications
  cp app/UT99.desktop $pkgname $pkgdir/usr/share/applications
}

UT99.desktop

[Desktop Entry]
Name=UT99
Exec=/opt/gog/gog-unreal-tournament-goty/launch.sh
Comment=UT99
Terminal=false
Icon=/opt/gog/gog-unreal-tournament-goty/System/Unreal.ico
Type=Application
Categories=Game;