hl2.sh

#!/bin/bash

# figure out the absolute path to the script being run a bit
# non-obvious, the ${0%/*} pulls the path out of $0, cd's into the
# specified directory, then uses $PWD to figure out where that
# directory lives - and all this in a subshell, so we don't affect
# $PWD

GAMEROOT=$(cd "${0%/*}" && echo $PWD)

#determine platform
UNAME=`uname`
if [ "$UNAME" == "Darwin" ]; then
   # prepend our lib path to LD_LIBRARY_PATH
   export DYLD_LIBRARY_PATH="${GAMEROOT}"/bin:$DYLD_LIBRARY_PATH
elif [ "$UNAME" == "Linux" ]; then
   # prepend our lib path to LD_LIBRARY_PATH
   export LD_LIBRARY_PATH="${GAMEROOT}"/bin:$LD_LIBRARY_PATH
fi

if [ -z $GAMEEXE ]; then
    if [ "$UNAME" == "Darwin" ]; then
        GAMEEXE=hl2_osx
    elif [ "$UNAME" == "Linux" ]; then
        GAMEEXE=hl2_linux
    fi
fi

ulimit -n 2048

# enable nVidia threaded optimizations
export __GL_THREADED_OPTIMIZATIONS=1

# and launch the game
cd "$GAMEROOT"

# Enable path match if we are running with loose files
if [ -f pathmatch.inf ]; then
    export ENABLE_PATHMATCH=1
fi

# Do the following for strace:
#   GAME_DEBUGGER="strace -f -o strace.log"
# Do the following for tcmalloc
#   LD_PRELOAD=../src/thirdparty/gperftools-2.0/.libs/libtcmalloc_debug.so:$LD_PRELOAD

STATUS=42
while [ $STATUS -eq 42 ]; do
    if [ "${GAME_DEBUGGER}" == "gdb" ] || [ "${GAME_DEBUGGER}" == "cgdb" ]; then
        ARGSFILE=$(mktemp $USER.hl2.gdb.XXXX)
        echo b main > "$ARGSFILE"

        # Set the LD_PRELOAD varname in the debugger, and unset the global version. This makes it so that
        #   gameoverlayrenderer.so and the other preload objects aren't loaded in our debugger's process.
        echo set env LD_PRELOAD=$LD_PRELOAD >> "$ARGSFILE"
        echo show env LD_PRELOAD >> "$ARGSFILE"
        unset LD_PRELOAD

        echo run $@ >> "$ARGSFILE"
        echo show args >> "$ARGSFILE"
        ${GAME_DEBUGGER} "${GAMEROOT}"/${GAMEEXE} -x "$ARGSFILE"
        rm "$ARGSFILE"
    else
        ${GAME_DEBUGGER} "${GAMEROOT}"/${GAMEEXE} "$@"
    fi
    STATUS=$?
done
exit $STATUS