#!/bin/sh

# NOTE: This is dfhack's modification of the normal invocation script,
# changed to properly set LD_PRELOAD so as to run DFHACK.
#
# You can run DF under gdb by passing -g or --gdb as the first argument.
#
# If the file ".dfhackrc" exists in the DF directory or your home directory
# it will be sourced by this script, to let you set environmental variables.
# If it exists in both places it will first source the one in your home
# directory, then the on in the game directory.
#
# Shell variables .dfhackrc can set to affect this script:
#     DF_GDB_OPTS: Options to pass to gdb, if it's being run
#     DF_VALGRIND_OPTS: Options to pass to valgrind, if it's being run
#     DF_HELGRIND_OPTS: Options to pass to helgrind, if it's being run
#     DF_RESET_OPTS: Options to pass the reset command at the end of
#       this script
#     DF_POST_CMD: Shell command to be run at very end of script

DF_DIR=$(dirname "$0")
cd "${DF_DIR}"
export SDL_DISABLE_LOCK_KEYS=1 # Work around for bug in Debian/Ubuntu SDL patch.
#export SDL_VIDEO_CENTERED=1 # Centre the screen.  Messes up resizing.

# User config files
RC=".dfhackrc"

if [ -r "$HOME/$RC" ]; then
    . $HOME/$RC
fi
if [ -r "./$RC" ]; then
    . "./$RC"
fi

# Now run

case "$1" in
  -g | --gdb)
    shift
    echo "set environment LD_PRELOAD=./libdfhack.so" > gdbcmd.tmp
    gdb $DF_GDB_OPTS -x gdbcmd.tmp ./libs/Dwarf_Fortress $*
    rm gdbcmd.tmp
    ret=$?
    ;;
  -h | --helgrind)
    shift
    LD_PRELOAD=./libdfhack.so valgrind $DF_HELGRIND_OPTS --tool=helgrind --log-file=helgrind.log ./libs/Dwarf_Fortress $*
    ret=$?
    ;;
  -v | --valgrind)
    shift
    LD_PRELOAD=./libdfhack.so valgrind $DF_VALGRIND_OPTS --log-file=valgrind.log ./libs/Dwarf_Fortress $*
    ret=$?
    ;;
  -c | --callgrind)
    shift
    LD_PRELOAD=./libdfhack.so valgrind $DF_CALLGRIND_OPTS --tool=callgrind --separate-threads=yes --dump-instr=yes --instr-atstart=no --log-file=callgrind.log ./libs/Dwarf_Fortress $*
    ret=$?
    ;;
  *)
    LD_PRELOAD=./libdfhack.so ./libs/Dwarf_Fortress $*
    ret=$?
    ;;
esac

# Reset terminal to sane state in case of a crash
reset $DF_RESET_OPTS

if [ -n "$DF_POST_CMD" ]; then
    eval $DF_POST_CMD
fi

exit $ret