Add helion (#2087)

Helion

A modern Doom engine written from the ground up with a focus on performance.

Content creators have created maps that struggle to render at high framerates with even the latest and most expensive hardware. With Helion, Doom’s most complex maps are no longer stressful on modern GPUs and playable on old hardware that was previously impossible.

Helion uses static rendering with a state management system to reconcile dynamic map changes in Doom. In contrast to the typical BSP tree rendering that requires significant CPU processing, Helion is able to manage dynamic changes and optimally utilize the GPU resulting in dramatic performance increases.

Helion supports WADs targeting vanilla, Boom, MBF, MBF21, UDMF (partial support), and ID24.

Minimum requirements are Windows 7 or Linux and an Open GL 3.3 capable GPU.

Source: https://github.com/Helion-Engine/Helion

Author: spinktvis

programs/x86_64-apps

@@ -1,3 +1,4 @@
+◆ helion : A modern fast paced Doom FPS engine.
 ◆ 0ad : Unofficial. FOSS historical Real Time Strategy, RTS game of ancient warfare.
 ◆ 0ad-prerelease : Unofficial. FOSS historical Real Time Strategy, RTS game of ancient warfare (Pre-release).
 ◆ 12to11 : Unofficial, tool for running Wayland applications on an X server.

programs/x86_64/helion

@@ -0,0 +1,77 @@
+#!/bin/sh
+
+# AM INSTALL SCRIPT VERSION 3.5
+set -u
+APP=helion
+SITE="Helion-Engine/Helion"
+
+# CREATE DIRECTORIES AND ADD REMOVER
+[ -n "$APP" ] && mkdir -p "/opt/$APP/tmp" "/opt/$APP/icons" && cd "/opt/$APP/tmp" || exit 1
+printf "#!/bin/sh\nset -e\nrm -f /usr/local/bin/$APP\nrm -R -f /opt/$APP" > ../remove
+printf '\n%s' "rm -f /usr/local/share/applications/$APP-AM.desktop" >> ../remove
+chmod a+x ../remove || exit 1
+
+# DOWNLOAD AND PREPARE THE APP, $version is also used for updates
+version=$(curl -Ls https://api.github.com/repos/Helion-Engine/Helion/releases/latest | sed 's/[()",{} ]/\n/g' | grep -oi "https.*mage$" | grep -vi "i386\|i686\|aarch64\|arm64\|armv7l" | head -1)
+wget "$version" || exit 1
+# Keep this space in sync with other installation scripts
+# Use tar fx ./*tar* here for example in this line in case a compressed file is downloaded.
+cd ..
+mv ./tmp/*mage ./"$APP"
+# Keep this space in sync with other installation scripts
+rm -R -f ./tmp || exit 1
+echo "$version" > ./version
+chmod a+x ./"$APP" || exit 1
+
+# LINK TO PATH
+ln -s "/opt/$APP/$APP" "/usr/local/bin/$APP"
+
+# SCRIPT TO UPDATE THE PROGRAM
+cat >> ./AM-updater << 'EOF'
+#!/bin/sh
+set -u
+APP=helion
+SITE="Helion-Engine/Helion"
+version0=$(cat "/opt/$APP/version")
+version=$(curl -Ls https://api.github.com/repos/Helion-Engine/Helion/releases/latest | sed 's/[()",{} ]/\n/g' | grep -oi "https.*mage$" | grep -vi "i386\|i686\|aarch64\|arm64\|armv7l" | head -1)
+[ -n "$version" ] || { echo "Error getting link"; exit 1; }
+if command -v appimageupdatetool >/dev/null 2>&1; then
+	cd "/opt/$APP" || exit 1
+	appimageupdatetool -Or ./"$APP" && chmod a+x ./"$APP" && echo "$version" > ./version && exit 0
+fi
+if [ "$version" != "$version0" ]; then
+	mkdir "/opt/$APP/tmp" && cd "/opt/$APP/tmp" || exit 1
+	notify-send "A new version of $APP is available, please wait"
+	wget "$version" || exit 1
+	# Use tar fx ./*tar* here for example in this line in case a compressed file is downloaded.
+	cd ..
+	mv --backup=t ./tmp/*mage ./"$APP"
+	chmod a+x ./"$APP" || exit 1
+	echo "$version" > ./version
+	rm -R -f ./*zs-old ./*.part ./tmp ./*~
+	notify-send "$APP is updated!"
+else
+	echo "Update not needed!"
+fi
+EOF
+chmod a+x ./AM-updater || exit 1
+
+# LAUNCHER & ICON
+./"$APP" --appimage-extract *.desktop 1>/dev/null && mv ./squashfs-root/*.desktop ./"$APP".desktop
+./"$APP" --appimage-extract .DirIcon 1>/dev/null && mv ./squashfs-root/.DirIcon ./DirIcon
+COUNT=0
+while [ "$COUNT" -lt 10 ]; do # Tries to get the actual icon/desktop if it is a symlink to another symlink
+	if [ -L ./"$APP".desktop ]; then
+		LINKPATH="$(readlink ./"$APP".desktop | sed 's|^\./||' 2>/dev/null)"
+		./"$APP" --appimage-extract "$LINKPATH" 1>/dev/null && mv ./squashfs-root/"$LINKPATH" ./"$APP".desktop
+	fi
+	if [ -L ./DirIcon ]; then
+		LINKPATH="$(readlink ./DirIcon | sed 's|^\./||' 2>/dev/null)"
+		./"$APP" --appimage-extract "$LINKPATH" 1>/dev/null && mv ./squashfs-root/"$LINKPATH" ./DirIcon
+	fi
+	[ ! -L ./"$APP".desktop ] && [ ! -L ./DirIcon ] && break
+	COUNT=$((COUNT + 1))
+done
+sed -i "s#Exec=[^ ]*#Exec=$APP#g; s#Icon=.*#Icon=/opt/$APP/icons/$APP#g; s# --no-sandbox##g" ./"$APP".desktop
+mv ./"$APP".desktop /usr/local/share/applications/"$APP"-AM.desktop && mv ./DirIcon ./icons/"$APP" 1>/dev/null
+rm -R -f ./squashfs-root