/*******************************************************************************
*
* Copyright 2011 Spiffy UI Team
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
/* forked from https://github.com/gli/closure-compiler-maven-plugin/blob/34c2d4395db1b88e606e06bb19e9a6e6cdf9d9f0/src/main/java/glisoft/ClosureCompilerMojo.java */
package org.spiffyui.maven.plugins;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;
import org.apache.commons.io.FileUtils;
import org.apache.maven.plugin.AbstractMojo;
import org.apache.maven.plugin.MojoExecutionException;
import org.apache.maven.plugin.MojoFailureException;
import org.apache.maven.project.MavenProject;
import com.google.common.base.Charsets;
import com.google.common.io.Files;
import com.google.javascript.jscomp.CompilationLevel;
import com.google.javascript.jscomp.Compiler;
import com.google.javascript.jscomp.CompilerOptions;
import com.google.javascript.jscomp.JSError;
import com.google.javascript.jscomp.JSSourceFile;
import com.google.javascript.jscomp.Result;
/**
* Invokes the Google Closure compiler for the project .js source
*
* @goal closure-compile
* @phase compile
*/
public class ClosureMojo extends AbstractMojo
{
/**
* {@link MavenProject} to process.
*
* @parameter expression="${project}"
* @required
* @readonly
*/
private MavenProject project;
/**
* Set the compilation level passed to the compiler
*
* @parameter expression="${spiffyui.closurecompiler.level}"
* default-value="SIMPLE_OPTIMIZATIONS"
* @required
*/
private String compilationLevel;
/**
* Path to the project .js source for compilation
*
* @parameter expression="${spiffyui.src.js}"
* default-value="${basedir}/src/main/js"
* @required
*/
private File sourceDirectory;
/**
* The compressed/aggregate javascript output file
*
* @parameter default-value="${spiffyui.www}/${project.artifactId}.min.js"
* @required
*/
private File outputFile;
/**
* @parameter default-value="${spiffyui.gwt.module.path}"
* @required
* @readonly
*/
private File gwtModulePath;
@Override
public void execute()
throws MojoExecutionException,
MojoFailureException
{
if (!sourceDirectory.exists()) {
getLog().debug("Source directory doesn't exist, skipping");
return;
}
/*
* The first step is to copy the uncompressed files into the
* target directory so users can see the real source for debugging
*/
File jsDir = new File(outputFile.getParentFile(), "js");
jsDir.mkdirs();
try {
FileUtils.copyDirectory(sourceDirectory, jsDir);
} catch (IOException ioe) {
throw new MojoFailureException("Unable to copy JavaScripot source" + ioe.getMessage());
}
String[] exts = {
"js"
};
List<File> files = new ArrayList<File>(FileUtils.listFiles(sourceDirectory, exts, true));
if (files.size() == 0) {
getLog().debug("No source files detected, skipping");
return;
}
CompilationLevel compLevel = null;
try {
compLevel = CompilationLevel.valueOf(compilationLevel);
} catch (IllegalArgumentException e) {
throw new MojoFailureException("Compilation level invalid" + e.getMessage());
}
CompilerOptions compilerOptions = new CompilerOptions();
compLevel.setOptionsForCompilationLevel(compilerOptions);
List<JSSourceFile> sources = new ArrayList<JSSourceFile>();
long lastMod = -1;
/* spiffyui.min.js _must_ be first */
sources.add(JSSourceFile.fromFile(new File(gwtModulePath, "spiffyui.min.js")));
for (File file : files) {
lastMod = Math.max(lastMod, file.lastModified());
sources.add(JSSourceFile.fromFile(file));
}
if (outputFile.exists() && lastMod < outputFile.lastModified()) {
/*
If the newest source file is older then the output file then
everything is up to date and we don't need to compile anything.
*/
getLog().info("Skipping JavaScript compilation. The compiled JavaScript file is up to date.");
return;
}
Compiler compiler = new Compiler();
compiler.setLoggingLevel(Level.WARNING);
Result result = compiler.compile(new ArrayList<JSSourceFile>(), sources, compilerOptions);
for (JSError warning : result.warnings) {
getLog().warn(warning.toString());
}
for (JSError error : result.errors) {
getLog().error(error.toString());
}
if (!result.success) {
throw new MojoFailureException("Compilation failure");
}
try {
Files.createParentDirs(outputFile);
Files.touch(outputFile);
Files.write(compiler.toSource(), outputFile, Charsets.UTF_8);
} catch (IOException e) {
throw new MojoFailureException(outputFile != null ? outputFile.toString() : e.getMessage());
}
}
}