Fix --release param check in bootstrap.bat

The following check will always fail silently due to batch `echo` always
taking strings literally - including double quotes:

    echo "public class JavacVersionCheck {}" >%CLASSDIR%\JavacVersionCheck.java
    "%JAVAC%" --release 8 -d %CLASSDIR% %CLASSDIR%\JavacVersionCheck.java >nul 2>&1

With the following error message:

    JavacVersionCheck.java:1: error: class, interface, or enum expected
    "public class JavacVersionCheck {}"
    ^
    1 error

Even with that fixed, the next statement will crash and burn on systems
that do not have Command Extensions enabled (e.g. invoked with `cmd /y`):

    IF %ERRORLEVEL% EQU 0 SET JAVAC_RELEASE_VERSION="--release 8"

With the following error message:

    EQU was unexpected at this time.

In order to accommodate that, those checks have been corrected.

Signed-off-by: Mateusz Kazimierczuk <[email protected]>

This closes apache#205 pull request at github.com/apache/ant

CONTRIBUTORS

@@ -278,6 +278,7 @@ Martin Landers
 Martin Poeschl
 Martin van den Bemt
 Martin von Gagern
+Mateusz Kazimierczuk
 Mathieu Champlon
 Mathieu Peltier
 Matt Albrecht

WHATSNEW

@@ -16,6 +16,10 @@ Fixed bugs:
    could result in an unexpected failure. This has now been fixed.
    Bugzilla Report 67417
 
+ * Fixes an issue in bootstrap.bat when trying to detect if the "javac"
+   command in the JDK supports the "--release" option.
+   Github Pull Request #205
+
 
 Changes from Ant 1.10.13 TO Ant 1.10.14
 =======================================

bootstrap.bat

@@ -60,21 +60,24 @@ if not exist build\nul mkdir build
 if not exist build\classes\nul mkdir build\classes
 
 rem Check if javac tool supports the --release param
-SET JAVAC_RELEASE_VERSION=""
-echo "public class JavacVersionCheck {}" > %CLASSDIR%\JavacVersionCheck.java
+SET JAVAC_RELEASE_VERSION=
+echo public class JavacVersionCheck {} >%CLASSDIR%\JavacVersionCheck.java
 "%JAVAC%" --release 8 -d %CLASSDIR% %CLASSDIR%\JavacVersionCheck.java >nul 2>&1
-IF %ERRORLEVEL% EQU 0 SET JAVAC_RELEASE_VERSION="--release 8"
+IF ERRORLEVEL 0 IF NOT ERRORLEVEL 1 SET JAVAC_RELEASE_VERSION=--release 8
 DEL %CLASSDIR%\JavacVersionCheck.java %CLASSDIR%\JavacVersionCheck.class >nul 2>&1
 echo.
-IF %JAVAC_RELEASE_VERSION% == "" (
+IF "%JAVAC_RELEASE_VERSION%" == "" (
   echo ... Compiling Ant Classes
   "%JAVAC%" %BOOTJAVAC_OPTS% -d %CLASSDIR% %TOOLS%\bzip2\*.java %TOOLS%\tar\*.java %TOOLS%\zip\*.java %TOOLS%\ant\*.java %TOOLS%\ant\types\*.java %TOOLS%\ant\taskdefs\*.java %TOOLS%\ant\util\regexp\RegexpMatcher.java %TOOLS%\ant\util\regexp\RegexpMatcherFactory.java %TOOLS%\ant\taskdefs\condition\*.java %TOOLS%\ant\taskdefs\compilers\*.java %TOOLS%\ant\types\resources\*.java %TOOLS%\ant\property\*.java
 ) ELSE (
-  echo ... Compiling Ant Classes with %JAVAC_RELEASE_VERSION%
+  echo ... Compiling Ant Classes with "%JAVAC_RELEASE_VERSION%"
   "%JAVAC%" %BOOTJAVAC_OPTS% -d %CLASSDIR% %JAVAC_RELEASE_VERSION% %TOOLS%\bzip2\*.java %TOOLS%\tar\*.java %TOOLS%\zip\*.java %TOOLS%\ant\*.java %TOOLS%\ant\types\*.java %TOOLS%\ant\taskdefs\*.java %TOOLS%\ant\util\regexp\RegexpMatcher.java %TOOLS%\ant\util\regexp\RegexpMatcherFactory.java %TOOLS%\ant\taskdefs\condition\*.java %TOOLS%\ant\taskdefs\compilers\*.java %TOOLS%\ant\types\resources\*.java %TOOLS%\ant\property\*.java
 )
 
-if ERRORLEVEL 1 goto mainend
+IF ERRORLEVEL 0 IF NOT ERRORLEVEL 1 goto build
+goto mainEnd
+
+:build
 
 echo.
 echo ... Copying Required Files

contributors.xml

@@ -1155,6 +1155,10 @@
     <first>Martin</first>
     <last>von Gagern</last>
   </name>
+  <name>
+    <first>Mateusz</first>
+    <last>Kazimierczuk</last>
+  </name>
   <name>
     <first>Mathieu</first>
     <last>Champlon</last>