Improved messaging of variables in run_server.sh

This change improves the messaging for each variable in
that the run_server.sh script expects. Running ther script
with any value missing will yield a usage message.

Author: vaage

run_server.sh

@@ -17,26 +17,41 @@
 TEAM_ID="$1"
 TEAM_SECRET="$2"
 PORT="$3"
-PERSISTENT="$4"
+PERSISTENT_DIR="$4"
 RELAY_ADDRESS="$5"
 
-if [[ "TEAM_ID" == "" || "$TEAM_SECRET" == "" || "$PORT" == "" || "$PERSISTENT" == "" ]] ; then
-  echo 'usage: <TEAM ID> <TEAM SECRET> <PORT> <PERSISENT> [RELAY ADDRESS]'
+if [[ "$TEAM_ID" == "" || "$TEAM_SECRET" == "" || "$PORT" == "" || "$PERSISTENT_DIR" == "" ]] ; then
+  echo 'usage: <TEAM ID> <TEAM SECRET> <PORT> <PERSISTENT> [RELAY ADDRESS]'
+  echo ''
+  echo 'TEAM ID :        The id registered with the relay server. If you are'
+  echo '                 not connecting to a relay server, use "100".'
+  echo 'TEAM SECRET :    The secret registerd with the relay server. If you are'
+  echo '                 not connecting to a relay server, use "ABABAB".'
+  echo 'PORT :           The port that the server will listen to for incoming '
+  echo '                 connections. This can be anything from 1024 to 65535.'
+  echo 'PERSISTENT DIR : The directory where the server can save data that will'
+  echo '                 exists between runs.'
+  echo 'RELAY ADDRESS  : This value is optional. If you want to connect to a '
+  echo '                 relay server, the address must be IP@PORT where IP is'
+  echo '                 the ip address of the relay server and PORT is the port'
+  echo '                 the relay server is listing on.'
+  echo ''
   exit 1
 fi
 
+
 cd './bin'
 if [ "$RELAY_ADDRESS" == "" ] ; then
   java codeu.chat.ServerMain \
       "$TEAM_ID" \
       "$TEAM_SECRET" \
       "$PORT" \
-      "$PERSISTENT"
+      "$PERSISTENT_DIR"
 else
   java codeu.chat.ServerMain \
       "$TEAM_ID" \
       "$TEAM_SECRET" \
       "$PORT" \
-      "$PERSISTENT" \
+      "$PERSISTENT_DIR" \
       "$RELAY_ADDRESS"
 fi