static ImmutableSet getPathToSourceFolders()

in src/com/facebook/buck/cli/TestCommand.java [196:260]
45 lines of code
13 McCabe index (conditional complexity)

  static ImmutableSet<String> getPathToSourceFolders(
      JavaLibraryRule rule,
      Optional<DefaultJavaPackageFinder> defaultJavaPackageFinderOptional,
      ProjectFilesystem projectFilesystem) {
    ImmutableSet<String> javaSrcPaths = rule.getJavaSrcs();

    // A Java library rule with just resource files has an empty javaSrcPaths.
    if (javaSrcPaths.isEmpty()) {
      return ImmutableSet.of();
    }

    // If defaultJavaPackageFinderOptional is not present, then it could mean that there was an
    // error reading from the buck configuration file.
    if (!defaultJavaPackageFinderOptional.isPresent()) {
      throw new HumanReadableException(
          "Please include a [java] section with src_root property in the .buckconfig file.");
    }

    DefaultJavaPackageFinder defaultJavaPackageFinder = defaultJavaPackageFinderOptional.get();

    // Iterate through all source paths to make sure we are generating a complete set of source
    // folders for the source paths.
    Set<String> srcFolders = Sets.newHashSet();
    loopThroughSourcePath:
    for (String javaSrcPath : javaSrcPaths) {
      if (!JavaTestRule.isGeneratedFile(javaSrcPath)) {

        // If the source path is already under a known source folder, then we can skip this
        // source path.
        for (String srcFolder : srcFolders) {
          if (javaSrcPath.startsWith(srcFolder)) {
            continue loopThroughSourcePath;
          }
        }

        // If the source path is under one of the source roots, then we can just add the source
        // root.
        ImmutableSortedSet<String> pathsFromRoot = defaultJavaPackageFinder.getPathsFromRoot();
        for (String root : pathsFromRoot) {
          if (javaSrcPath.startsWith(root)) {
            srcFolders.add(root);
            continue loopThroughSourcePath;
          }
        }

        // Traverse the file system from the parent directory of the java file until we hit the
        // parent of the src root directory.
        ImmutableSet<String> pathElements = defaultJavaPackageFinder.getPathElements();
        File directory = projectFilesystem.getFileForRelativePath(javaSrcPath).getParentFile();
        while (directory != null && !pathElements.contains(directory.getName())) {
          directory = directory.getParentFile();
        }

        if (directory != null) {
          String directoryPath = directory.getPath();
          if (!directoryPath.endsWith("/")) {
            directoryPath += "/";
          }
          srcFolders.add(directoryPath);
        }
      }
    }

    return ImmutableSet.copyOf(srcFolders);
  }