private Compiler createCompiler(
List<SourceFile> inputs, List<SourceFile> externs, CompilerOptions compilerOptions) {
Compiler compiler = new Compiler();
compiler.disableThreads();
compiler.compile(externs, inputs, compilerOptions);
return compiler;
}
/**
* Minimize the output using google closure compiler.
*
* @param output The input file to minimize.
* @throws IOException If something goes wrong.
* @throws MojoFailureException If something goes wrong.
*/
private void minimize(final File output) throws IOException, MojoFailureException {
final CompilerOptions options = new CompilerOptions();
options.setCodingConvention(new ClosureCodingConvention());
options.setOutputCharset("UTF-8");
options.setWarningLevel(DiagnosticGroups.CHECK_VARIABLES, CheckLevel.WARNING);
CompilationLevel.SIMPLE_OPTIMIZATIONS.setOptionsForCompilationLevel(options);
Compiler.setLoggingLevel(Level.SEVERE);
Compiler compiler = new Compiler();
compiler.disableThreads();
compiler.initOptions(options);
Result result =
compiler.compile(
Collections.<SourceFile>emptyList(),
Arrays.asList(SourceFile.fromFile(output)),
options);
if (result.success) {
FileUtils.fileWrite(output, compiler.toSource());
} else {
JSError[] errors = result.errors;
throw new MojoFailureException(errors[0].toString());
}
}