Use /nul when checkign for the existence of directories on Windows

(Although it doesn't work if the directory name is quoted - woohoo)
Check for Ant in C:\Ant for Windows 9X users

PR:	2101
Based on suggestion by eswierk@cs.stanford.edu (Ed Swierk)


git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@269331 13f79535-47bb-0310-9956-ffa450edef68

bootstrap.bat

@@ -18,10 +18,10 @@ if "" == "%JAVAC%"                        set JAVAC=%JAVA_HOME%\bin\javac
 echo.
 echo ... Bootstrapping Ant Distribution
 
-if     "%OS%" == "Windows_NT" if exist bootstrap rmdir/s/q bootstrap
-if not "%OS%" == "Windows_NT" if exist bootstrap deltree/y bootstrap
-if     "%OS%" == "Windows_NT" if exist build\classes rmdir/s/q build\classes
-if not "%OS%" == "Windows_NT" if exist build\classes deltree/y build\classes
+if     "%OS%" == "Windows_NT" if exist bootstrap\nul rmdir/s/q bootstrap
+if not "%OS%" == "Windows_NT" if exist bootstrap\nul deltree/y bootstrap
+if     "%OS%" == "Windows_NT" if exist build\classes\nul rmdir/s/q build\classes
+if not "%OS%" == "Windows_NT" if exist build\classes\nul deltree/y build\classes
 
 SET LOCALCLASSPATH=lib\crimson.jar;lib\jaxp.jar;lib\optional\junit.jar
 
@@ -41,9 +41,9 @@ echo CLASSPATH=%CLASSPATH%
 if     "%OS%" == "Windows_NT" if exist %CLASSDIR%\nul rmdir/s/q %CLASSDIR%
 if not "%OS%" == "Windows_NT" if exist %CLASSDIR%\nul deltree/y %CLASSDIR%
 
-if not exist %CLASSDIR% mkdir %CLASSDIR%
-if not exist build mkdir build
-if not exist build\classes mkdir build\classes
+if not exist %CLASSDIR%\nul mkdir %CLASSDIR%
+if not exist build\nul mkdir build
+if not exist build\classes\nul mkdir build\classes
 
 echo.
 echo ... Compiling Ant Classes

src/script/ant.bat

@@ -52,10 +52,16 @@ goto checkJava
 
 :checkSystemDrive
 rem check for ant in root directory of system drive
-if not exist "%SystemDrive%\ant" goto noAntHome
+if not exist %SystemDrive%\ant\nul goto checkCDrive
 set ANT_HOME=%SystemDrive%\ant
 goto checkJava
 
+:checkCDrive
+rem check for ant in C:\ant for Win9X users
+if not exist C:\ant\nul goto noAntHome
+set ANT_HOME=C:\ant
+goto checkJava
+
 :noAntHome
 echo ANT_HOME is not set and ant could not be located. Please set ANT_HOME.
 goto end