first commit

LICENSE

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+Copyright (c) 2021 Marco "eukara" Hladik
+
+Permission to use, copy, modify, and distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
+IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 

README.md

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+# Steam Play - reGTA
+
+Come and get me, you fools.
+
+# Dependencies
+None, it expects your /bin/sh to handle arrays and things though.
+
+# Installation
+In order to install it, you just clone
+the repository into your $HOME/.steam/steam/compatibilitytools.d/ directory.
+
+If the directory 'compatibilitytools.d' does not exist, make sure to create it.
+
+# License
+
+Copyright (c) 2021 Marco "eukara" Hladik
+
+Permission to use, copy, modify, and distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
+IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 

compatibilitytool.vdf

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+"compatibilitytools"
+{
+	"compat_tools"
+	{
+		"regta_wrapper" // Internal name of this tool
+		{
+			"install_path" "."
+			"display_name" "ReGTA"
+			"from_oslist"  "windows"
+			"to_oslist"    "linux"
+		}
+	}
+}

regta_wrapper

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+#!/bin/sh
+
+# there's run & wait-before-run, we only care about the latter.
+COMMANDTYPE=$1
+
+# this is how Steam tries to run the game
+if [ "$COMMANDTYPE" == "wait-before-run" ]; then
+	# used to decipher which game we'll play
+	GAMEBINARY=$(basename "$2")
+	# steam game dir
+	GAMEDIR=$(dirname "$2")
+
+	PARMARR=( "$@" )
+	ARGLEN=${#PARMARR[@]}
+	GAMEARGS=${PARMARR[@]:2:$ARGLEN-1}
+
+	if [ "$GAMEBINARY" == "gta-vc.exe" ]; then
+		cd "$GAMEDIR"
+		if ! [ -f ./reVC ]; then
+			if ! [ -f ./revc-linux.tar.gz ]; then
+				wget https://www.frag-net.com/dl/saved/revc-linux.tar.gz
+			fi
+			tar xvfz ./revc-linux.tar.gz
+		fi
+		./run-reVC.sh
+	elif [ "$GAMEBINARY" == "gta3.exe" ]; then
+		cd "$GAMEDIR"
+		if ! [ -f ./re3 ]; then
+			if ! [ -f ./re3-linux.tar.gz ]; then
+				wget https://www.frag-net.com/dl/saved/re3-linux.tar.gz
+			fi
+			tar xvfz ./re3-linux.tar.gz
+		fi
+		./run-re3.sh
+	fi
+fi

toolmanifest.vdf

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+"manifest"
+{
+	"commandline"			"/regta_wrapper run"
+	"commandline_waitforexitandrun"	"/regta_wrapper wait-before-run"
+	"commandline_getnativepath"	"/regta_wrapper get-native-path"
+	"commandline_getcompatpath"	"/regta_wrapper get-compat-path"
+}