Get current version from appmanifest_${appid}.acf

forceUpdate had a window of time between initiating the
update and getting the current version where it could
miss an update.  Close that window by getting the installed
version from the appmanifest file.

tools/arkmanager

@@ -85,22 +85,12 @@ function isUpdateNeeded(){
 }
 
 #
-# Return the current version number
+# Parse an ACF structure
+# $1 is the desired path
+# $2 is the desired property
+# $3 is the current path
 #
-function getCurrentVersion(){
-  cd "$arkserverroot"
-  if ! [ -f arkversion ];then
-    touch arkversion
-  fi
-  instver=`cat "arkversion"`
-  return $instver
-
-}
-
-#
-# Parse the buildid from steamcmd
-#
-function parseSteamAppVer(){
+function parseSteamACF(){
   local sname
   while read name val; do
     name="${name#\"}"
@@ -110,9 +100,9 @@ function parseSteamAppVer(){
     if [ "$name" = "}" ]; then
       break
     elif [ "$name" == "{" ]; then
-      parseSteamAppVer "${1}.${sname}"
+      parseSteamACF "$1" "$2" "${3}.${sname}"
     else
-      if [ "$1" == ".depots.branches.public" -a "$name" == "buildid" ]; then
+      if [ "$3" == "$1" -a "$name" == "$2" ]; then
         echo "$val"
         break
       fi
@@ -121,11 +111,23 @@ function parseSteamAppVer(){
   done
 }
 
+#
+# Return the current version number
+#
+function getCurrentVersion(){
+  if [ -f "${arkserverroot}/steamapps/appmanifest_${appid}.acf" ]; then
+    instver=`while read name val; do if [ "${name}" == "{" ]; then parseSteamACF "" "buildid"; break; fi; done <"${arkserverroot}/steamapps/appmanifest_${appid}.acf"`
+  else
+    instver=""
+  fi
+  return $instver
+}
+
 #
 # Get the current available server version on steamdb
 #
 function getAvailableVersion(){
-  bnumber=`$steamcmdroot/$steamcmdexec +login anonymous +app_info_print "$appid" +quit | while read name val; do if [ "${name}" == "{" ]; then parseSteamAppVer; break; fi; done`
+  bnumber=`$steamcmdroot/$steamcmdexec +login anonymous +app_info_print "$appid" +quit | while read name val; do if [ "${name}" == "{" ]; then parseSteamACF ".depots.branches.public" "buildid"; break; fi; done`
   return $bnumber
 }