public void visit()

in java/com/google/gerrit/plugins/codeowners/backend/CodeOwnerConfigScanner.java [99:171]
62 lines of code
10 McCabe index (conditional complexity)

  public void visit(
      BranchNameKey branchNameKey,
      CodeOwnerConfigVisitor codeOwnerConfigVisitor,
      InvalidCodeOwnerConfigCallback invalidCodeOwnerConfigCallback,
      @Nullable String pathGlob) {
    requireNonNull(branchNameKey, "branchNameKey");
    requireNonNull(codeOwnerConfigVisitor, "codeOwnerConfigVisitor");
    requireNonNull(invalidCodeOwnerConfigCallback, "invalidCodeOwnerConfigCallback");

    CodeOwnerBackend codeOwnerBackend =
        codeOwnersPluginConfiguration
            .getProjectConfig(branchNameKey.project())
            .getBackend(branchNameKey.branch());
    logger.atFine().log(
        "scanning code owner files in branch %s of project %s (path glob = %s)",
        branchNameKey.branch(), branchNameKey.project(), pathGlob);

    if (includeDefaultCodeOwnerConfig && !RefNames.REFS_CONFIG.equals(branchNameKey.branch())) {
      logger.atFine().log("Scanning code owner config file in %s", RefNames.REFS_CONFIG);
      Optional<CodeOwnerConfig> metaCodeOwnerConfig =
          codeOwnerBackend.getCodeOwnerConfig(
              CodeOwnerConfig.Key.createWithFileName(
                  codeOwnerBackend, branchNameKey.project(), RefNames.REFS_CONFIG, "/"),
              /** revision */
              null);
      if (metaCodeOwnerConfig.isPresent()) {
        boolean visitFurtherCodeOwnerConfigFiles =
            codeOwnerConfigVisitor.visit(metaCodeOwnerConfig.get());
        if (!visitFurtherCodeOwnerConfigFiles) {
          // By returning false the callback told us to not visit any further code owner config
          // files, hence we are done and do not need to search for further code owner config files
          // in the branch.
          return;
        }
      }
    }

    try (Repository repository = repoManager.openRepository(branchNameKey.project());
        RevWalk rw = new RevWalk(repository);
        CodeOwnerConfigTreeWalk treeWalk =
            new CodeOwnerConfigTreeWalk(
                codeOwnerBackend, branchNameKey, repository, rw, pathGlob)) {
      while (treeWalk.next()) {
        CodeOwnerConfig codeOwnerConfig;
        try {
          codeOwnerConfig = treeWalk.getCodeOwnerConfig();
        } catch (CodeOwnersInternalServerErrorException codeOwnersInternalServerErrorException) {
          Optional<InvalidCodeOwnerConfigException> invalidCodeOwnerConfigException =
              getInvalidCodeOwnerConfigCause(codeOwnersInternalServerErrorException);
          if (!invalidCodeOwnerConfigException.isPresent()) {
            // Propagate any failure that is not related to the contents of the code owner config.
            throw codeOwnersInternalServerErrorException;
          }

          // The code owner config is invalid and cannot be parsed.
          invalidCodeOwnerConfigCallback.onInvalidCodeOwnerConfig(
              treeWalk.getFilePath(), invalidCodeOwnerConfigException.get());
          continue;
        }

        boolean visitFurtherCodeOwnerConfigFiles = codeOwnerConfigVisitor.visit(codeOwnerConfig);
        if (!visitFurtherCodeOwnerConfigFiles) {
          break;
        }
      }
    } catch (IOException e) {
      throw new CodeOwnersInternalServerErrorException(
          String.format(
              "Failed to scan for code owner configs in branch %s of project %s",
              branchNameKey.branch(), branchNameKey.project()),
          e);
    }
  }