buildSrc/src/main/java/com/uber/okbuck/wrapper/BuckWrapperTask.java [21:147]:
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@SuppressWarnings({"WeakerAccess", "CanBeFinal", "unused", "ResultOfMethodCallIgnored", "NewApi"})
public class BuckWrapperTask extends DefaultTask {

  @Input public String repo;

  @Input public Set<String> watch;

  @Input public Set<String> sourceRoots;

  @Input public Set<String> ignoredDirs;

  private final File wrapper = getProject().file("buckw");

  @Inject
  public BuckWrapperTask(
      String repo, Set<String> watch, Set<String> sourceRoots, Set<String> ignoredDirs) {
    this.repo = repo;
    this.watch = watch;
    this.sourceRoots = sourceRoots;
    this.ignoredDirs = ignoredDirs;
  }

  @TaskAction
  void installWrapper() {
    new BuckWrapper()
        .customBuckRepo(repo)
        .watch(toWatchmanMatchers(watch))
        .sourceRoots(toWatchmanMatchers(sourceRoots))
        .ignoredDirs(toWatchmanIgnoredDirs(ignoredDirs))
        .render(wrapper);
    wrapper.setExecutable(true);

    File watchmanConfig = getProject().file(".watchmanconfig");
    if (!watchmanConfig.exists()) {
      FileUtil.copyResourceToProject(
          "wrapper/WATCHMAN_CONFIG", getProject().file(".watchmanconfig"));
    }
  }

  @Override
  @Internal
  public String getDescription() {
    return "Create buck wrapper";
  }

  @Override
  @Internal
  public String getGroup() {
    return OkBuckGradlePlugin.GROUP;
  }

  private static String toWatchmanIgnoredDirs(Set<String> ignoredDirs) {
    if (ignoredDirs.isEmpty()) {
      return "";
    }

    String ignoreExprs =
        ignoredDirs
            .stream()
            .map(ignoredDir -> "            [\"dirname\", \"" + ignoredDir + "\"]")
            .collect(Collectors.joining(",\n"));

    return "        [\"not\",\n" + ignoreExprs + "\n        ]";
  }

  private static String toWatchmanMatchers(Set<String> wildcardPatterns) {
    List<String> matches = new ArrayList<>();
    List<String> suffixes = new ArrayList<>();
    List<String> names = new ArrayList<>();

    for (String wildcardPattern : wildcardPatterns) {
      String simplifiedPattern =
          wildcardPattern.startsWith("**/")
              ? wildcardPattern.replaceAll("\\*\\*/", "")
              : wildcardPattern;
      String basename = FilenameUtils.getBaseName(simplifiedPattern);
      String extension = FilenameUtils.getExtension(simplifiedPattern);
      if (!simplifiedPattern.contains("/")) {
        // simple file name with no path prefixes
        if (basename.equals("*")) { // suffix
          suffixes.add(extension);
        } else { // name
          names.add(simplifiedPattern);
        }
      } else {
        matches.add(wildcardPattern);
      }
    }

    String matchExprs =
        matches
            .stream()
            .map(match -> "            [\"match\", \"" + match + "\", \"wholename\"]")
            .collect(Collectors.joining(",\n"));

    String suffixExprs =
        suffixes
            .stream()
            .map(suffix -> "            [\"suffix\", \"" + suffix + "\"]")
            .collect(Collectors.joining(",\n"));

    @Var
    String nameExpr =
        names.stream().map(name -> "\"" + name + "\"").collect(Collectors.joining(", "));
    if (!nameExpr.isEmpty()) {
      nameExpr = "            [\"name\", [" + nameExpr + "]]";
    }

    return Stream.of(suffixExprs, nameExpr, matchExprs)
        .filter(StringUtils::isNotEmpty)
        .collect(Collectors.joining(",\n"));
  }

  public String getRepo() {
    return repo;
  }

  public Set<String> getWatch() {
    return watch;
  }

  public Set<String> getSourceRoots() {
    return sourceRoots;
  }

  public Set<String> getIgnoredDirs() {
    return ignoredDirs;
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plugin/src/main/java/com/uber/okbuck/wrapper/BuckWrapperTask.java [21:147]:
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@SuppressWarnings({"WeakerAccess", "CanBeFinal", "unused", "ResultOfMethodCallIgnored", "NewApi"})
public class BuckWrapperTask extends DefaultTask {

  @Input public String repo;

  @Input public Set<String> watch;

  @Input public Set<String> sourceRoots;

  @Input public Set<String> ignoredDirs;

  private final File wrapper = getProject().file("buckw");

  @Inject
  public BuckWrapperTask(
      String repo, Set<String> watch, Set<String> sourceRoots, Set<String> ignoredDirs) {
    this.repo = repo;
    this.watch = watch;
    this.sourceRoots = sourceRoots;
    this.ignoredDirs = ignoredDirs;
  }

  @TaskAction
  void installWrapper() {
    new BuckWrapper()
        .customBuckRepo(repo)
        .watch(toWatchmanMatchers(watch))
        .sourceRoots(toWatchmanMatchers(sourceRoots))
        .ignoredDirs(toWatchmanIgnoredDirs(ignoredDirs))
        .render(wrapper);
    wrapper.setExecutable(true);

    File watchmanConfig = getProject().file(".watchmanconfig");
    if (!watchmanConfig.exists()) {
      FileUtil.copyResourceToProject(
          "wrapper/WATCHMAN_CONFIG", getProject().file(".watchmanconfig"));
    }
  }

  @Override
  @Internal
  public String getDescription() {
    return "Create buck wrapper";
  }

  @Override
  @Internal
  public String getGroup() {
    return OkBuckGradlePlugin.GROUP;
  }

  private static String toWatchmanIgnoredDirs(Set<String> ignoredDirs) {
    if (ignoredDirs.isEmpty()) {
      return "";
    }

    String ignoreExprs =
        ignoredDirs
            .stream()
            .map(ignoredDir -> "            [\"dirname\", \"" + ignoredDir + "\"]")
            .collect(Collectors.joining(",\n"));

    return "        [\"not\",\n" + ignoreExprs + "\n        ]";
  }

  private static String toWatchmanMatchers(Set<String> wildcardPatterns) {
    List<String> matches = new ArrayList<>();
    List<String> suffixes = new ArrayList<>();
    List<String> names = new ArrayList<>();

    for (String wildcardPattern : wildcardPatterns) {
      String simplifiedPattern =
          wildcardPattern.startsWith("**/")
              ? wildcardPattern.replaceAll("\\*\\*/", "")
              : wildcardPattern;
      String basename = FilenameUtils.getBaseName(simplifiedPattern);
      String extension = FilenameUtils.getExtension(simplifiedPattern);
      if (!simplifiedPattern.contains("/")) {
        // simple file name with no path prefixes
        if (basename.equals("*")) { // suffix
          suffixes.add(extension);
        } else { // name
          names.add(simplifiedPattern);
        }
      } else {
        matches.add(wildcardPattern);
      }
    }

    String matchExprs =
        matches
            .stream()
            .map(match -> "            [\"match\", \"" + match + "\", \"wholename\"]")
            .collect(Collectors.joining(",\n"));

    String suffixExprs =
        suffixes
            .stream()
            .map(suffix -> "            [\"suffix\", \"" + suffix + "\"]")
            .collect(Collectors.joining(",\n"));

    @Var
    String nameExpr =
        names.stream().map(name -> "\"" + name + "\"").collect(Collectors.joining(", "));
    if (!nameExpr.isEmpty()) {
      nameExpr = "            [\"name\", [" + nameExpr + "]]";
    }

    return Stream.of(suffixExprs, nameExpr, matchExprs)
        .filter(StringUtils::isNotEmpty)
        .collect(Collectors.joining(",\n"));
  }

  public String getRepo() {
    return repo;
  }

  public Set<String> getWatch() {
    return watch;
  }

  public Set<String> getSourceRoots() {
    return sourceRoots;
  }

  public Set<String> getIgnoredDirs() {
    return ignoredDirs;
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