Simplify handling of LEIN_JAVA_CMD to support parens in paths, such a…

…s with "Program Files (x86)"

bin/lein.bat

@@ -66,10 +66,13 @@ if exist "%~dp0..\src\leiningen\version.clj" (
 if not "x%DEBUG%" == "x" echo CLASSPATH=!CLASSPATH!
 :: ##################################################
 
+if "x!JAVA_CMD!" == "x" set JAVA_CMD=java
+if "x!LEIN_JAVA_CMD!" == "x" set LEIN_JAVA_CMD=%JAVA_CMD%
+
+rem ensure a single set of quotes around java commands
+for /f "usebackq delims=" %%i in ('!JAVA_CMD!') do set JAVA_CMD="%%~i"
+for /f "usebackq delims=" %%i in ('!LEIN_JAVA_CMD!') do set LEIN_JAVA_CMD="%%~i"
 
-call :EnsureIsSet JAVA_CMD java
-call :EnsureIsSet LEIN_JAVA_CMD %JAVA_CMD%
-rem if "x%JAVA_CMD%" == "x" set JAVA_CMD="java"
 if "x%JVM_OPTS%" == "x" set JVM_OPTS=%JAVA_OPTS%
 goto RUN
 
@@ -91,29 +94,6 @@ if NOT ERRORLEVEL 9009 (
 
 goto EOF
 
-:EnsureIsSet 
-rem parameters: Variable DefaultValue
-rem Variable's value can be empty, if it is then it will be set to the DefaultValue(which is not modified/stripped)
-rem it will strip all encountered double quotes from Variable and from Variable's value
-rem this script will fail if Variable contains characters like >, <, |, & or even parentheses or even number of double quotes
-rem the Variable's value will be surrounded by double quotes (no inner double quotes though, they're all stripped)
-rem  except in the case of DefaultValue which is set as it is
-
-SETLOCAL
-set _var=%~1
-
-call set _result=%%%_var%%%
-
-for /f "useback tokens=*" %%a in ('%_result%') do (
-set _result=%%~a
-set _result=%_result:"=%
-)
-
-( ENDLOCAL
-  if "x%_result%" == "x" (set %_var%=%2) ELSE (set %_var%="%_result%")
-)
-goto :eof
-
 
 :NO_LEIN_JAR
 echo.