shellcheck launch scripts

(thanks, dogerish)

server.sh

@@ -1,7 +1,7 @@
 #!/bin/sh
 # SAUER_DIR should refer to the directory in which Sauerbraten data files are placed.
 #SAUER_DIR=~/sauerbraten
-if [ -z ${SAUER_DIR} ]
+if [ -z "${SAUER_DIR}" ]
 then
   if [ -x ~/sauerbraten-code ]
   then
@@ -21,11 +21,11 @@ SAUER_OPTIONS="-q${HOME}/.p1xbraten -k${SAUER_DIR}"
 
 # SYSTEM_NAME should be set to the name of your operating system.
 #SYSTEM_NAME=Linux
-SYSTEM_NAME=`uname -s`
+SYSTEM_NAME=$(uname -s)
 
 # MACHINE_NAME should be set to the name of your processor.
 #MACHINE_NAME=i686
-MACHINE_NAME=`uname -m`
+MACHINE_NAME=$(uname -m)
 
 case ${SYSTEM_NAME} in
 Linux)
@@ -44,24 +44,24 @@ x86_64|amd64)
   MACHINE_NAME=64_
   ;;
 *)
-  if [ ${SYSTEM_NAME} != native_ ]
+  if [ "${SYSTEM_NAME}" != native_ ]
   then
     SYSTEM_NAME=native_
   fi
   MACHINE_NAME=
   ;;
 esac
 
-if [ -x ${SAUER_BIN}/native_server ]
+if [ -x "${SAUER_BIN}/native_server" ]
 then
   SYSTEM_NAME=native_
   MACHINE_NAME=
 fi
 
-if [ -x ${SAUER_BIN}/${SYSTEM_NAME}${MACHINE_NAME}server ]
+if [ -x "${SAUER_BIN}/${SYSTEM_NAME}${MACHINE_NAME}server" ]
 then
   #exec gdb --args ${SAUER_BIN}/${SYSTEM_NAME}${MACHINE_NAME}server ${SAUER_OPTIONS} "$@"
-  exec ${SAUER_BIN}/${SYSTEM_NAME}${MACHINE_NAME}server ${SAUER_OPTIONS} "$@"
+  exec "${SAUER_BIN}/${SYSTEM_NAME}${MACHINE_NAME}server" ${SAUER_OPTIONS} "$@"
 else
   echo "Your platform does not have a pre-compiled Sauerbraten client."
   echo "Please follow the following steps to build a native client:"

start.sh

@@ -1,7 +1,7 @@
 #!/bin/sh
 # SAUER_DIR should refer to the directory in which Sauerbraten data files are placed.
 #SAUER_DIR=~/sauerbraten
-if [ -z ${SAUER_DIR} ]
+if [ -z "${SAUER_DIR}" ]
 then
   if [ -x ~/sauerbraten-code ]
   then
@@ -21,11 +21,11 @@ SAUER_OPTIONS="-q${HOME}/.p1xbraten -k${SAUER_DIR}"
 
 # SYSTEM_NAME should be set to the name of your operating system.
 #SYSTEM_NAME=Linux
-SYSTEM_NAME=`uname -s`
+SYSTEM_NAME=$(uname -s)
 
 # MACHINE_NAME should be set to the name of your processor.
 #MACHINE_NAME=i686
-MACHINE_NAME=`uname -m`
+MACHINE_NAME=$(uname -m)
 
 case ${SYSTEM_NAME} in
 Linux)
@@ -58,15 +58,15 @@ then
   MACHINE_NAME=
 fi
 
-if [ ${XDG_SESSION_TYPE} == wayland ]
+if [ "${XDG_SESSION_TYPE}" = wayland ]
 then
   export SDL_VIDEODRIVER=wayland
 fi
 
-if [ -x ${SAUER_BIN}/${SYSTEM_NAME}${MACHINE_NAME}client ]
+if [ -x "${SAUER_BIN}/${SYSTEM_NAME}${MACHINE_NAME}client" ]
 then
   #exec gdb --args ${SAUER_BIN}/${SYSTEM_NAME}${MACHINE_NAME}client ${SAUER_OPTIONS} "$@"
-  exec ${SAUER_BIN}/${SYSTEM_NAME}${MACHINE_NAME}client ${SAUER_OPTIONS} "$@"
+  exec "${SAUER_BIN}/${SYSTEM_NAME}${MACHINE_NAME}client" ${SAUER_OPTIONS} "$@"
 else
   echo "Your platform does not have a pre-compiled Sauerbraten client."
   echo "Please follow the following steps to build a native client:"