Make ant install-maven work on windows as well

build.xml

@@ -33,7 +33,11 @@ the common tasks and can be called on to run the main aspects of all the sub-scr
 	<available file="${rt-openjdk6}" property="rt-openjdk6.available" />
 	<available file="${rt-openjdk8}" property="rt-openjdk8.available" />
 	<property environment="env"/>
-
+	
+	<condition property="isWindows">
+		<os family="windows" />
+	</condition>
+	
 	<path id="build.path">
 		<fileset dir="lib/build">
 			<include name="*.jar" />
@@ -368,31 +372,33 @@ lombok.launch.AnnotationProcessorHider$ClaimingProcessor,isolating</echo>
 		<property name="lombok.dist.built" value="true" />
 	</target>
 	
-	<target name="install-maven" depends="version,dist" description="Install THE lombok.jar into the local maven repository using Apache Maven">
+	<target name="-mvn-ext" if="isWindows">
+		<property name="mvn-ext" value=".cmd" />
+	</target>
+	
+	<target name="install-maven" depends="version,dist,-mvn-ext" description="Install THE lombok.jar into the local maven repository using Apache Maven">
 		<fail unless="env.MAVEN_HOME" message="MAVEN_HOME environment variable must be set. "/>
 		<echo message="MAVEN_HOME: ${env.MAVEN_HOME}"  />
 		<echo message="Lombok version: ${lombok.version}-SNAPSHOT"  />
-	
+		
 		<echo file="pom.xml"><![CDATA[<project>
-			    <modelVersion>4.0.0</modelVersion>
-			    <groupId>org.projectlombok</groupId>
-			    <artifactId>lombok</artifactId>
-			    <version>]]>${lombok.version}-SNAPSHOT<![CDATA[</version>
+			<modelVersion>4.0.0</modelVersion>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<version>]]>${lombok.version}-SNAPSHOT<![CDATA[</version>
 </project>]]></echo>
 
-		<exec executable="${env.MAVEN_HOME}/bin/mvn">
-		    <arg value="install:install-file"/>
-		    <arg value="-Dfile=dist/lombok-${lombok.version}.jar"/>
-		    <arg value="-DgroupId=org.projectlombok"/>
-		    <arg value="-DartifactId=lombok"/>
-		    <arg value="-Dversion=${lombok.version}-SNAPSHOT"/>
-		    <arg value="-Dpackaging=jar"/>
-	  	</exec>
-
-	  	<delete file="pom.xml" quiet="true" />
-
+		<exec executable="${env.MAVEN_HOME}/bin/mvn${mvn-ext}">
+			<arg value="install:install-file"/>
+			<arg value="-Dfile=dist/lombok-${lombok.version}.jar"/>
+			<arg value="-DgroupId=org.projectlombok"/>
+			<arg value="-DartifactId=lombok"/>
+			<arg value="-Dversion=${lombok.version}-SNAPSHOT"/>
+			<arg value="-Dpackaging=jar"/>
+		</exec>
+		<delete file="pom.xml" quiet="true" />
 	</target>
-
+	
 	<target name="dist-utils" description="Builds lombok-utils.jar, which is a library used by i.e. lombok.ast project." depends="version, compile">
 		<mkdir dir="dist" />
 		<jar destfile="dist/lombok-utils-${lombok.version}.jar">