Sync BaseTools Trunk (version r2518) to EDKII main trunk.

Signed-off-by: Liming Gao <liming.gao@intel.com>


git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13178 6f19259b-4bc3-4df7-8a09-765794883524

BaseTools/Source/Python/AutoGen/BuildEngine.py

@@ -354,6 +354,7 @@ class BuildRule:
         self._FamilyList = []
         self._TotalToolChainFamilySet = set()
         self._RuleObjectList = [] # FileBuildRule object list
+        self._FileVersion = ""
 
         self.Parse()
 
@@ -368,7 +369,11 @@ class BuildRule:
             # Clean up the line and replace path separator with native one
             Line = self.RuleContent[Index].strip().replace(self._PATH_SEP, os.path.sep)
             self.RuleContent[Index] = Line
-
+            
+            # find the build_rule_version
+            if Line and Line[0] == "#" and Line.find(TAB_BUILD_RULE_VERSION) <> -1:
+                if Line.find("=") <> -1 and Line.find("=") < (len(Line)-1) and (Line[(Line.find("=") + 1):]).split():
+                    self._FileVersion = (Line[(Line.find("=") + 1):]).split()[0]
             # skip empty or comment line
             if Line == "" or Line[0] == "#":
                 continue