com.google.code.play2.provider.play26.Play26JavascriptCompiler Maven / Gradle / Ivy
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Play! 2.x Provider for Play! 2.6.x
/*
* Copyright 2013-2018 Grzegorz Slowikowski (gslowikowski at gmail dot com)
*
* 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.
*/
package com.google.code.play2.provider.play26;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileFilter;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
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.Result;
import com.google.javascript.jscomp.SourceFile;
//import org.mozilla.javascript.Context;
//import org.mozilla.javascript.Function;
//import org.mozilla.javascript.NativeArray;
//import org.mozilla.javascript.NativeJavaObject;
//import org.mozilla.javascript.Scriptable;
//import org.mozilla.javascript.ScriptableObject;
//import org.mozilla.javascript.tools.shell.Global;
//import org.mozilla.javascript.*;
//import org.mozilla.javascript.tools.shell.*;
import com.google.code.play2.provider.api.AssetCompilationException;
import com.google.code.play2.provider.api.JavascriptCompilationResult;
import com.google.code.play2.provider.api.Play2JavascriptCompiler;
public class Play26JavascriptCompiler
implements Play2JavascriptCompiler
{
private List compilerOptions = Collections.emptyList();
@Override
public void setCompilerOptions( List compilerOptions )
{
this.compilerOptions = compilerOptions;
}
@Override
public CompileResult compile( File source )
throws AssetCompilationException, IOException
{
boolean requireJsMode = compilerOptions.contains( "rjs" );
boolean commonJsMode = compilerOptions.contains( "commonJs" ) && !requireJsMode;
String origin = readFileContent( source );
CompilerOptions options = getOptions( source, commonJsMode );
Compiler compiler = new Compiler();
List all = allSiblings( source );
// In commonJsMode, we use all JavaScript sources in the same directory for some reason.
// Otherwise, we only look at the current file.
List inputs = new ArrayList();
if ( commonJsMode )
{
for ( File f : all )
{
inputs.add( SourceFile.fromFile( f ) );
}
}
else
{
inputs.add( SourceFile.fromFile( source ) );
}
try
{
List externs = Collections.emptyList();
Result result = compiler.compile( externs, inputs, options );
if ( result.success )
{
String minifiedJs = null;
if ( !requireJsMode )
{
minifiedJs = compiler.toSource();
}
return new CompileResult( origin, minifiedJs, null );
}
else
{
// val error = compiler.getErrors().head
// val errorFile = all.find(f => f.getAbsolutePath() == error.sourceName)
// throw AssetCompilationException(errorFile, error.description, Some(error.lineNumber), None)
JSError error = compiler.getErrors()[0];
File errorFile = null;
for ( File f: all )
{
if ( f.getAbsolutePath().equals( error.sourceName ) )
{
errorFile = f;
break;
}
}
throw new AssetCompilationException( errorFile, error.description, error.lineNumber, 0/*null*/ );
}
}
catch ( Exception e )
{
throw new AssetCompilationException( e, source, "Internal Closure Compiler error (see logs)", 0/*null*/, 0/*null*/ );
}
}
private CompilerOptions getOptions( File source, boolean commonJsMode )
{
//TODO - add a possibility to specify "fullCompilerOptions"
CompilerOptions defaultOptions = new CompilerOptions();
defaultOptions.closurePass = true;
if ( commonJsMode )
{
defaultOptions.setProcessCommonJSModules( true );
// The compiler always expects forward slashes even on Windows.
defaultOptions.setCommonJSModulePathPrefix( ( source.getParent() + File.separator ).replaceAll( "\\\\",
"/" ) );
List entryPoints = new ArrayList( 1 );
entryPoints.add( toModuleName( source.getName() ) );
defaultOptions.setManageClosureDependencies( entryPoints );
}
for ( String opt : compilerOptions )
{
if ( "advancedOptimizations".equals( opt ) )
{
CompilationLevel.ADVANCED_OPTIMIZATIONS.setOptionsForCompilationLevel( defaultOptions );
}
/*???else if ( "checkCaja".equals( opt ) )
{
defaultOptions.setCheckCaja( true );
}
else if ( "checkControlStructures".equals( opt ) )
{
defaultOptions.setCheckControlStructures( true );
}???*/
else if ( "checkTypes".equals( opt ) )
{
defaultOptions.setCheckTypes( true );
}
else if ( "checkSymbols".equals( opt ) )
{
defaultOptions.setCheckSymbols( true );
}
else if ( "ecmascript5".equals( opt ) )
{
defaultOptions.setLanguageIn( CompilerOptions.LanguageMode.ECMASCRIPT5 );
}
}
return defaultOptions;
}
@Override
public String minify( String source, String name )
throws AssetCompilationException
{
Compiler compiler = new Compiler();
CompilerOptions options = new CompilerOptions();
if ( name == null )
{
name = "unknown";
}
List inputs = new ArrayList( 1 );
inputs.add( SourceFile.fromCode( name, source ) );
List externs = Collections.emptyList();
if ( compiler.compile( externs, inputs, options ).success )
{
return compiler.toSource();
}
else
{
JSError error = compiler.getErrors()[0];
throw new AssetCompilationException( null/*???*/, error.description, error.lineNumber, 0/*null*/ );
}
/*
* compiler.compile(Array[SourceFile](), input, options).success match { case true => compiler.toSource() case
* false => { val error = compiler.getErrors().head throw AssetCompilationException(None, error.description,
* Some(error.lineNumber), None) } }
*/
}
/**
* Turns a filename into a JS identifier that is used for moduleNames in rewritten code. Removes leading ./,
* replaces / with $, removes trailing .js and replaces - with _. All moduleNames get a "module$" prefix.
*/
private String toModuleName( String filename )
{
return "module$"
+ filename.replaceAll( "^\\./", "" ).replaceAll( "/", "\\$" ).replaceAll( "\\.js$", "" ).replaceAll( "-",
"_" );
}
/**
* Return all Javascript files in the same directory than the input file, or subdirectories
*/
private List allSiblings( File source )
{
return allJsFilesIn( source.getParentFile() );
}
private List allJsFilesIn( File dir )/* : Seq[File] = */
{
List result = new ArrayList();
// import scala.collection.JavaConversions._
File[] jsFiles = dir.listFiles( new FileFilter()
{
public boolean accept( File f )
{
return f.getName().endsWith( ".js" );
}
} );
result.addAll( Arrays.asList( jsFiles ) );
File[] directories = dir.listFiles( new FileFilter()
{
public boolean accept( File f )
{
return f.isDirectory();
}
} );
for ( File directory : directories )
{
result.addAll( allJsFilesIn( directory ) );
}
// val jsFilesChildren = directories.map(d => allJsFilesIn(d)).flatten
// jsFiles ++ jsFilesChildren
return result;
}
private String readFileContent( File file )
throws IOException
{
String result = null;
BufferedReader is = new BufferedReader( new InputStreamReader( new FileInputStream( file ), "UTF-8" ) );
try
{
StringBuilder sb = new StringBuilder();
String line = is.readLine();
while ( line != null )
{
sb.append( line ).append( '\n' );
line = is.readLine();
}
result = sb.toString();
}
finally
{
is.close();
}
return result;
}
public static class CompileResult
implements JavascriptCompilationResult
{
private String js;
private String minifiedJs;
private List dependencies;
public CompileResult( String js, String minifiedJs, List dependencies )
{
this.js = js;
this.minifiedJs = minifiedJs;
this.dependencies = dependencies;
}
@Override
public String getJs()
{
return js;
}
@Override
public String getMinifiedJs()
{
return minifiedJs;
}
@Override
public List getDependencies()
{
return dependencies;
}
}
}