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‎.classpath

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<?xml version="1.0" encoding="UTF-8"?>
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<classpath>
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<classpathentry kind="src" output="bin/main" path="src">
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<attributes>
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<attribute name="gradle_scope" value="main"/>
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<attribute name="gradle_used_by_scope" value="main,test"/>
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</attributes>
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</classpathentry>
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<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8/"/>
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<classpathentry kind="con" path="org.eclipse.buildship.core.gradleclasspathcontainer"/>
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<classpathentry kind="output" path="bin/default"/>
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</classpath>

‎.gitattributes

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# Auto detect text files and perform LF normalization
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* text=auto
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*.java text eol=lf
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*.java diff=java

‎.gitignore

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/.gradle/
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/bin/
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/build/

‎.project

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<?xml version="1.0" encoding="UTF-8"?>
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<projectDescription>
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<name>JWebAssembly-Gradle</name>
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<comment></comment>
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<projects>
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</projects>
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<buildSpec>
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<buildCommand>
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<name>org.eclipse.jdt.core.javabuilder</name>
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<arguments>
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</arguments>
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</buildCommand>
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<buildCommand>
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<name>org.eclipse.buildship.core.gradleprojectbuilder</name>
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<arguments>
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</arguments>
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</buildCommand>
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</buildSpec>
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<natures>
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<nature>org.eclipse.jdt.core.javanature</nature>
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<nature>org.eclipse.buildship.core.gradleprojectnature</nature>
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</natures>
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</projectDescription>

‎.settings/org.eclipse.buildship.core.prefs

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connection.project.dir=
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eclipse.preferences.version=1

‎.settings/org.eclipse.jdt.core.prefs

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eclipse.preferences.version=1
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org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
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org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8
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org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
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org.eclipse.jdt.core.compiler.compliance=1.8
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org.eclipse.jdt.core.compiler.debug.lineNumber=generate
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org.eclipse.jdt.core.compiler.debug.localVariable=generate
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org.eclipse.jdt.core.compiler.debug.sourceFile=generate
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org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
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org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
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org.eclipse.jdt.core.compiler.source=1.8

‎src/META-INF/gradle-plugins/de.inetsoftware.jwebassembler.properties

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implementation-class=de.inetsoftware.jwebassembly.gradle.WasmPlugin

‎src/de/inetsoftware/jwebassembly/gradle/OutputFormat.java

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/*
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* Copyright 2018 Volker Berlin (i-net software)
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package de.inetsoftware.jwebassembly.gradle;
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/**
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* Possible output formats
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*
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* @author Volker Berlin
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*
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*/
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public enum OutputFormat {
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Binary, Text;
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}

‎src/de/inetsoftware/jwebassembly/gradle/WasmCompiler.java

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/*
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* Copyright 2018 Volker Berlin (i-net software)
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package de.inetsoftware.jwebassembly.gradle;
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import java.io.File;
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import java.io.FileOutputStream;
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import java.io.OutputStreamWriter;
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import java.lang.reflect.InvocationTargetException;
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import java.lang.reflect.Method;
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import java.net.URL;
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import java.net.URLClassLoader;
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import java.nio.charset.StandardCharsets;
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import java.util.ArrayList;
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import javax.annotation.Nonnull;
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import org.gradle.api.Project;
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import org.gradle.api.artifacts.Configuration;
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import org.gradle.api.tasks.TaskExecutionException;
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/**
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* A wrapper to the downloaded JWebAssembly via reflection.
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*
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* @author Volker Berlin
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*/
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class WasmCompiler {
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private static Class<?> jWebAssemblyClass;
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private static Method addFile;
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private static Method compileToBinary;
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private static Method compileToText;
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private WasmTask task;
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private Object instance;
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/**
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* Create a new instance of the compiler. To download the right version this must occur lazy after the
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* configuration.
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*
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* @param task
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* current task with configuration
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*/
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WasmCompiler( WasmTask task ) {
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this.task = task;
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try {
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instance = getCompilerClass( task ).newInstance();
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} catch( Exception ex ) {
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throw new TaskExecutionException( task, ex );
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}
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}
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/**
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* Get the class from JWebAssembly.
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*/
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private Class<?> getCompilerClass( WasmTask task ) throws Exception {
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if( jWebAssemblyClass == null ) {
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Project project = task.getProject();
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project.getDependencies().add( WasmPlugin.CONFIGURATION_NAME, "de.inetsoftware:jwebassembly-compiler:" + task.getCompilerVersion() );
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Configuration config = project.getConfigurations().getByName( WasmPlugin.CONFIGURATION_NAME );
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ArrayList<URL> urls = new ArrayList<>();
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for( File file : config.getFiles() ) {
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task.getLogger().lifecycle( "\tcompiler: " + file.getName() );
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urls.add( file.toURI().toURL() );
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}
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URLClassLoader cl = new URLClassLoader( urls.toArray( new URL[0] ) );
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jWebAssemblyClass = cl.loadClass( "de.inetsoftware.jwebassembly.JWebAssembly" );
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addFile = getMethod( "addFile", File.class );
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compileToBinary = getMethod( "compileToBinary", File.class );
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compileToText = getMethod( "compileToText", Appendable.class );
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}
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return jWebAssemblyClass;
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}
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/**
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* Load a method via reflection for later use.
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*
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* @param name
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* the method name
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* @param parameterTypes
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* the parameters
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* @return the requested method
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*/
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private static Method getMethod( String name, Class<?>... parameterTypes ) throws Exception {
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Method method = jWebAssemblyClass.getMethod( name, parameterTypes );
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method.setAccessible( true );
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return method;
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}
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/**
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* Add a single file to the compiler
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*
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* @param file
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* the file
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*/
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void addFile( @Nonnull File file ) {
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try {
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addFile.invoke( instance, file );
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} catch( InvocationTargetException ex ) {
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throw new TaskExecutionException( task, ex.getTargetException() );
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} catch( Exception ex ) {
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throw new TaskExecutionException( task, ex );
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}
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}
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/**
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* Do the compiling to a wasm file.
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*/
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void compile() {
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try {
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if( task.getFormat() == OutputFormat.Binary ) {
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compileToBinary.invoke( instance, task.getArchivePath() );
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} else {
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try (OutputStreamWriter output = new OutputStreamWriter( new FileOutputStream( task.getArchivePath() ), StandardCharsets.UTF_8 )) {
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compileToText.invoke( instance, output );
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}
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}
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} catch( InvocationTargetException ex ) {
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Throwable targetException = ex.getTargetException();
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String msg = "WasmException".equals( targetException.getClass().getSimpleName() ) ? targetException.getMessage() : targetException.toString();
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task.getLogger().error( "> WASM compile failed with: " + msg );
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throw new TaskExecutionException( task, targetException );
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} catch( Exception ex ) {
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throw new TaskExecutionException( task, ex );
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}
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}
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}

‎src/de/inetsoftware/jwebassembly/gradle/WasmPlugin.java

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/*
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* Copyright 2018 Volker Berlin (i-net software)
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package de.inetsoftware.jwebassembly.gradle;
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import org.gradle.api.Plugin;
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import org.gradle.api.Project;
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import org.gradle.api.Task;
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import org.gradle.api.artifacts.Configuration;
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import org.gradle.api.plugins.BasePlugin;
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import org.gradle.api.plugins.JavaPlugin;
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import org.gradle.api.plugins.JavaPluginConvention;
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import org.gradle.api.tasks.SourceSet;
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/**
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* The WASM Gradle Plugin class.
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*
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* @author Volker Berlin
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*/
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public class WasmPlugin implements Plugin<Project> {
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static final String CONFIGURATION_NAME = "wasmCompiler";
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/**
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* {@inheritDoc}
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*/
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@Override
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public void apply( Project project ) {
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project.getPlugins().apply( JavaPlugin.class );
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JavaPluginConvention javaConvention = project.getConvention().getPlugin( JavaPluginConvention.class );
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SourceSet main = javaConvention.getSourceSets().getByName( SourceSet.MAIN_SOURCE_SET_NAME );
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WasmTask wasm = project.getTasks().create( "wasm", WasmTask.class );
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wasm.setDescription( "Assembles a jar archive containing the main classes." );
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wasm.setGroup( BasePlugin.BUILD_GROUP );
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wasm.from( main.getOutput() );
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// Create dependencies
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wasm.dependsOn( "classes" );
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Task build = project.getTasks().getByName( "build" );
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build.dependsOn( wasm );
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// Creates the configurations used by plugin.
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Configuration config = project.getConfigurations().create( CONFIGURATION_NAME );
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config.setVisible( false );
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config.setTransitive( true );
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config.setDescription( "The WASM Compiler dependency." );
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}
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}

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