[MCOMPILER-322] Set the JPMS module version

Author: rfscholte

src/it/MCOMPILER-268_modulepath/verify.groovy

@@ -19,3 +19,7 @@
 def log = new File( basedir, 'build.log').text
 
 assert log.count( " --module-path" ) == 2
+
+def descriptor = java.lang.module.ModuleFinder.of(basedir.toPath().resolve("target/classes")).find( "M.N" ).get().descriptor()
+assert '1.0-SNAPSHOT' == descriptor.version().get() as String
+assert 'M.N@1.0-SNAPSHOT' == descriptor.toNameAndVersion()

src/main/java/org/apache/maven/plugin/compiler/CompilerMojo.java

@@ -305,6 +305,14 @@ protected void preparePaths( Set<File> sourceFiles )
                 {
                     modulepathElements.add( file.getPath() );
                 }
+                
+                if ( compilerArgs == null )
+                {
+                    compilerArgs = new ArrayList<String>();
+                }
+                compilerArgs.add( "--module-version" );
+                compilerArgs.add( getProject().getVersion() );
+                
             }
             catch ( IOException e )
             {