".dfhackrc" user config file

If the file ".dfhackrc" exists in the user's home directory or in the
game directory it will be sourced, so the user can set environmental
variables like LD_LIBRARY_PATH.  There's also a few shell variables it
can set to alter the behavior of the dfhack script.

package/linux/dfhack

@@ -4,28 +4,53 @@
 # 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 -x gdbcmd.tmp ./libs/Dwarf_Fortress $*
+    gdb $DF_GDB_OPTS -x gdbcmd.tmp ./libs/Dwarf_Fortress $*
     rm gdbcmd.tmp
     ret=$?
     ;;
   -h | --helgrind)
     shift
-    LD_PRELOAD=./libdfhack.so valgrind --tool=helgrind --log-file=helgrind.log ./libs/Dwarf_Fortress $*
+    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 --log-file=valgrind.log ./libs/Dwarf_Fortress $*
+    LD_PRELOAD=./libdfhack.so valgrind $DF_VALGRIND_OPTS --log-file=valgrind.log ./libs/Dwarf_Fortress $*
     ret=$?
     ;;
   *)
@@ -35,6 +60,10 @@ case "$1" in
 esac
 
 # Reset terminal to sane state in case of a crash
-reset
+reset $DF_RESET_OPTS
+
+if [ -n "$DF_POST_CMD" ]; then
+    eval $DF_POST_CMD
+fi
 
 exit $ret