private static void addSourceDirectoriesFromLibraries(
@NotNull Project project,
@NotNull VirtualFile directory,
@NotNull Collection<VirtualFile> outSourceRoots) {
ProjectFileIndex index = ProjectFileIndex.SERVICE.getInstance(project);
VirtualFile classRoot = index.getClassRootForFile(directory);
if (classRoot == null) return;
String relativePath = VfsUtilCore.getRelativePath(directory, classRoot);
if (relativePath == null) return;
for (OrderEntry orderEntry : index.getOrderEntriesForFile(directory)) {
for (VirtualFile sourceRoot : orderEntry.getFiles(OrderRootType.SOURCES)) {
VirtualFile sourceFile = sourceRoot.findFileByRelativePath(relativePath);
if (sourceFile != null) {
outSourceRoots.add(sourceFile);
}
}
}
}
