private static Map<String, String> buildClassToSourceMap(
     ModuleChunk chunk,
     CompileContext context,
     Set<String> toCompilePaths,
     String moduleOutputPath)
     throws IOException {
   final Map<String, String> class2Src = new HashMap<String, String>();
   for (Module module : chunk.getModules()) {
     final String moduleName = module.getName().toLowerCase(Locale.US);
     final SourceToOutputMapping srcToOut =
         context.getDataManager().getSourceToOutputMap(moduleName, context.isCompilingTests());
     for (String src : srcToOut.getKeys()) {
       if (!toCompilePaths.contains(src) && isGroovyFile(src)) {
         final Collection<String> outs = srcToOut.getState(src);
         if (outs != null) {
           for (String out : outs) {
             if (out.endsWith(".class") && out.startsWith(moduleOutputPath)) {
               final String className =
                   out.substring(moduleOutputPath.length(), out.length() - ".class".length())
                       .replace('/', '.');
               class2Src.put(className, src);
             }
           }
         }
       }
     }
   }
   return class2Src;
 }
  private static boolean doCaching(
      @NotNull CompileContext context,
      @NotNull Collection<Module> modules,
      @NotNull Map<Module, AndroidFileSetState> module2state)
      throws IOException {
    boolean success = true;
    final File dataStorageRoot = context.getDataManager().getDataStorageRoot();
    final AndroidFileSetStorage storage =
        new AndroidFileSetStorage(dataStorageRoot, "resource_caching");

    try {
      for (Module module : modules) {
        final AndroidFileSetState state = module2state.get(module);

        try {
          if (!runPngCaching(context, module, storage, state)) {
            success = false;
          }
        } catch (IOException e) {
          AndroidJpsUtil.reportExceptionError(context, null, e, BUILDER_NAME);
        }
      }
    } finally {
      storage.close();
    }
    return success;
  }
  private static boolean doPackaging(
      @NotNull CompileContext context, @NotNull Collection<Module> modules) throws IOException {
    final boolean release = AndroidJpsUtil.isReleaseBuild(context);
    final File dataStorageRoot = context.getDataManager().getDataStorageRoot();

    boolean success = true;

    AndroidFileSetStorage apkFileSetStorage = null;
    AndroidApkBuilderConfigStateStorage apkBuilderConfigStateStorage = null;
    try {
      final String apkFileSetStorageName = "apk_builder_file_set" + (release ? "_release" : "_dev");
      apkFileSetStorage = new AndroidFileSetStorage(dataStorageRoot, apkFileSetStorageName);

      final String apkBuilderStateStorageName =
          "apk_builder_config" + (release ? "_release" : "_dev");
      apkBuilderConfigStateStorage =
          new AndroidApkBuilderConfigStateStorage(dataStorageRoot, apkBuilderStateStorageName);

      for (Module module : modules) {
        try {
          if (!doPackagingForModule(
              context, module, apkFileSetStorage, apkBuilderConfigStateStorage, release)) {
            success = false;
          }
        } catch (IOException e) {
          AndroidJpsUtil.reportExceptionError(context, null, e, BUILDER_NAME);
          success = false;
        }
      }
    } finally {
      if (apkFileSetStorage != null) {
        apkFileSetStorage.close();
      }

      if (apkBuilderConfigStateStorage != null) {
        apkBuilderConfigStateStorage.close();
      }
    }

    return success;
  }
  private boolean updateDependencies(
      CompileContext context,
      ModuleChunk chunk,
      List<File> toCompile,
      String moduleOutputPath,
      List<GroovycOSProcessHandler.OutputItem> successfullyCompiled)
      throws IOException {
    final Mappings delta = context.createDelta();
    final List<File> successfullyCompiledFiles = new ArrayList<File>();
    if (!successfullyCompiled.isEmpty()) {

      final Callbacks.Backend callback = delta.getCallback();
      final FileGeneratedEvent generatedEvent = new FileGeneratedEvent();

      for (GroovycOSProcessHandler.OutputItem item : successfullyCompiled) {
        final String sourcePath = FileUtil.toSystemIndependentName(item.sourcePath);
        final String outputPath = FileUtil.toSystemIndependentName(item.outputPath);
        final RootDescriptor moduleAndRoot = context.getModuleAndRoot(new File(sourcePath));
        if (moduleAndRoot != null) {
          final String moduleName = moduleAndRoot.module.getName().toLowerCase(Locale.US);
          context
              .getDataManager()
              .getSourceToOutputMap(moduleName, moduleAndRoot.isTestRoot)
              .appendData(sourcePath, outputPath);
        }
        callback.associate(
            outputPath,
            Callbacks.getDefaultLookup(sourcePath),
            new ClassReader(FileUtil.loadFileBytes(new File(outputPath))));
        successfullyCompiledFiles.add(new File(sourcePath));

        generatedEvent.add(
            moduleOutputPath, FileUtil.getRelativePath(moduleOutputPath, outputPath, '/'));
      }

      context.processMessage(generatedEvent);
    }

    return updateMappings(context, delta, chunk, toCompile, successfullyCompiledFiles);
  }
  private static boolean doResourcePackaging(
      @NotNull CompileContext context,
      @NotNull Collection<Module> modules,
      @NotNull Map<Module, AndroidFileSetState> resourcesStates,
      @NotNull Map<Module, AndroidFileSetState> assetsStates)
      throws IOException {
    boolean success = true;

    final File dataStorageRoot = context.getDataManager().getDataStorageRoot();
    final boolean releaseBuild = AndroidJpsUtil.isReleaseBuild(context);
    AndroidFileSetStorage resourcesStorage = null;
    AndroidFileSetStorage assetsStorage = null;

    try {
      final String resourcesStorageName =
          releaseBuild ? "resources_packaging_release" : "resources_packaging_dev";
      resourcesStorage = new AndroidFileSetStorage(dataStorageRoot, resourcesStorageName);

      final String assetsStorageName =
          releaseBuild ? "assets_packaging_release" : "assets_packaging_dev";
      assetsStorage = new AndroidFileSetStorage(dataStorageRoot, assetsStorageName);

      final Set<Module> modulesToUpdateState = new HashSet<Module>();

      for (Module module : modules) {
        final AndroidFacet facet = AndroidJpsUtil.getFacet(module);
        if (facet == null) {
          continue;
        }

        boolean updateState = true;

        if (!facet.isLibrary()
            && !(context.isMake()
                && checkUpToDate(module, resourcesStates, resourcesStorage)
                && checkUpToDate(module, assetsStates, assetsStorage))) {

          updateState = packageResources(facet, context);

          if (!updateState) {
            success = false;
          }
        }
        if (updateState) {
          modulesToUpdateState.add(module);
        }
      }

      for (Module module : modules) {
        final boolean updateState = modulesToUpdateState.contains(module);
        resourcesStorage.update(module.getName(), updateState ? resourcesStates.get(module) : null);
        assetsStorage.update(module.getName(), updateState ? assetsStates.get(module) : null);
      }
    } finally {
      if (resourcesStorage != null) {
        resourcesStorage.close();
      }

      if (assetsStorage != null) {
        assetsStorage.close();
      }
    }
    return success;
  }
  public Builder.ExitCode build(final CompileContext context, ModuleChunk chunk)
      throws ProjectBuildException {
    ExitCode exitCode = ExitCode.OK;
    final Map<File, Module> toCompile = new HashMap<File, Module>();
    try {
      context.processFilesToRecompile(
          chunk,
          new FileProcessor() {
            @Override
            public boolean apply(Module module, File file, String sourceRoot) throws Exception {
              final String path = file.getPath();
              if (isGroovyFile(path)) { // todo file type check
                toCompile.put(file, module);
              }
              return true;
            }
          });

      if (toCompile.isEmpty()) {
        return exitCode;
      }

      final Set<String> cp = new LinkedHashSet<String>();
      // groovy_rt.jar
      // IMPORTANT! must be the first in classpath
      cp.add(ClasspathBootstrap.getResourcePath(GroovyCompilerWrapper.class).getPath());

      for (File file :
          context
              .getProjectPaths()
              .getClasspathFiles(chunk, ClasspathKind.compile(context.isCompilingTests()), false)) {
        cp.add(FileUtil.toCanonicalPath(file.getPath()));
      }
      for (File file :
          context
              .getProjectPaths()
              .getClasspathFiles(chunk, ClasspathKind.runtime(context.isCompilingTests()), false)) {
        cp.add(FileUtil.toCanonicalPath(file.getPath()));
      }

      final File tempFile = FileUtil.createTempFile("ideaGroovyToCompile", ".txt", true);
      final Module representativeModule = chunk.getModules().iterator().next();
      File moduleOutputDir =
          context
              .getProjectPaths()
              .getModuleOutputDir(representativeModule, context.isCompilingTests());
      final File dir =
          myForStubs
              ? FileUtil.createTempDirectory(/*new File("/tmp/stubs/"), */ "groovyStubs", null)
              : moduleOutputDir;
      assert dir != null;

      final Set<String> toCompilePaths = new LinkedHashSet<String>();
      for (File file : toCompile.keySet()) {
        toCompilePaths.add(FileUtil.toSystemIndependentName(file.getPath()));
      }

      String moduleOutputPath = FileUtil.toCanonicalPath(moduleOutputDir.getPath());
      if (!moduleOutputPath.endsWith("/")) {
        moduleOutputPath += "/";
      }
      Map<String, String> class2Src =
          buildClassToSourceMap(chunk, context, toCompilePaths, moduleOutputPath);

      String encoding = "UTF-8"; // todo encoding
      List<String> patchers = Collections.emptyList(); // todo patchers
      GroovycOSProcessHandler.fillFileWithGroovycParameters(
          tempFile,
          FileUtil.toCanonicalPath(dir.getPath()),
          toCompilePaths,
          FileUtil.toSystemDependentName(moduleOutputPath),
          class2Src,
          encoding,
          patchers);

      if (myForStubs) {
        JavaBuilder.addTempSourcePathRoot(context, dir);
      }

      // todo CompilerUtil.addLocaleOptions()
      // todo different outputs in a chunk
      // todo module jdk path
      final List<String> cmd =
          ExternalProcessUtil.buildJavaCommandLine(
              SystemProperties.getJavaHome() + "/bin/java",
              "org.jetbrains.groovy.compiler.rt.GroovycRunner",
              Collections.<String>emptyList(),
              new ArrayList<String>(cp),
              Arrays.asList(
                  "-Xmx384m" /*, "-Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=5858"*/),
              Arrays.<String>asList(myForStubs ? "stubs" : "groovyc", tempFile.getPath()));

      deleteCorrespondingOutputFiles(context, toCompile);

      List<GroovycOSProcessHandler.OutputItem> successfullyCompiled = Collections.emptyList();
      try {
        final Process process = Runtime.getRuntime().exec(cmd.toArray(new String[cmd.size()]));
        GroovycOSProcessHandler handler =
            new GroovycOSProcessHandler(process, null) {
              @Override
              protected void updateStatus(@Nullable String status) {
                context.processMessage(
                    new ProgressMessage(status == null ? GROOVY_COMPILER_IN_OPERATION : status));
              }
            };
        handler.startNotify();
        handler.waitFor();

        successfullyCompiled = handler.getSuccessfullyCompiled();

        final List<CompilerMessage> messages = handler.getCompilerMessages();
        for (CompilerMessage message : messages) {
          context.processMessage(message);
        }

        boolean hasMessages = !messages.isEmpty();

        final StringBuffer unparsedBuffer = handler.getStdErr();
        if (unparsedBuffer.length() != 0) {
          context.processMessage(
              new CompilerMessage(BUILDER_NAME, BuildMessage.Kind.INFO, unparsedBuffer.toString()));
        }

        final int exitValue = handler.getProcess().exitValue();
        if (!hasMessages && exitValue != 0) {
          context.processMessage(
              new CompilerMessage(
                  BUILDER_NAME,
                  BuildMessage.Kind.ERROR,
                  "Internal groovyc error: code " + exitValue));
        }
      } finally {
        if (!myForStubs) {
          final Mappings delta = context.createDelta();
          final List<File> successfullyCompiledFiles = new ArrayList<File>();
          if (!successfullyCompiled.isEmpty()) {
            final Callbacks.Backend callback = delta.getCallback();

            for (GroovycOSProcessHandler.OutputItem item : successfullyCompiled) {
              final String sourcePath = FileUtil.toSystemIndependentName(item.sourcePath);
              final String outputPath = FileUtil.toSystemIndependentName(item.outputPath);
              final RootDescriptor moduleAndRoot = context.getModuleAndRoot(new File(sourcePath));
              if (moduleAndRoot != null) {
                final String moduleName = moduleAndRoot.module.getName().toLowerCase(Locale.US);
                context
                    .getDataManager()
                    .getSourceToOutputMap(moduleName, moduleAndRoot.isTestRoot)
                    .appendData(sourcePath, outputPath);
              }
              callback.associate(
                  outputPath,
                  Callbacks.getDefaultLookup(sourcePath),
                  new ClassReader(FileUtil.loadFileBytes(new File(outputPath))));
              successfullyCompiledFiles.add(new File(sourcePath));
            }
          }

          final boolean needSecondPass =
              updateMappings(context, delta, chunk, toCompile.keySet(), successfullyCompiledFiles);
          if (needSecondPass) {
            exitCode = ExitCode.ADDITIONAL_PASS_REQUIRED;
          }
        }
      }

      return exitCode;
    } catch (Exception e) {
      throw new ProjectBuildException(e);
    }
  }