public BuildTarget parse()

in src/com/facebook/buck/parser/BuildTargetParser.java [52:119]
58 lines of code
15 McCabe index (conditional complexity)

  public BuildTarget parse(String buildTargetName, ParseContext parseContext)
      throws NoSuchBuildTargetException {
    Preconditions.checkNotNull(buildTargetName);
    Preconditions.checkNotNull(parseContext);

    for (String invalidSubstring : INVALID_BUILD_RULE_SUBSTRINGS) {
      if (buildTargetName.contains(invalidSubstring)) {
        throw new BuildTargetParseException(
            String.format("%s cannot contain %s", buildTargetName, invalidSubstring));
      }
    }

    if (buildTargetName.endsWith(BUILD_RULE_SEPARATOR) &&
        parseContext.getType() != ParseContext.Type.VISIBILITY) {
      throw new BuildTargetParseException(
          String.format("%s cannot end with a colon", buildTargetName));
    }

    List<String> parts = ImmutableList.copyOf(BUILD_RULE_SEPARATOR_SPLITTER.split(buildTargetName));
    if (parts.size() != 2) {
      throw new BuildTargetParseException(String.format(
          "%s must contain exactly one colon (found %d)", buildTargetName, parts.size() - 1));
    }

    String baseName = parts.get(0).isEmpty() ? parseContext.getBaseName() : parts.get(0);
    String shortName = parts.get(1);

    String fullyQualifiedName = String.format("%s:%s", baseName, shortName);
    if (!fullyQualifiedName.startsWith(BUILD_RULE_PREFIX)) {
      throw new BuildTargetParseException(
          String.format("%s must start with %s", fullyQualifiedName, BUILD_RULE_PREFIX));
    }

    // Make sure the directory that contains the build file exists.
    String buildFileDirectory = baseName.substring(BUILD_RULE_PREFIX.length());
    String buildFilePath = (buildFileDirectory.isEmpty() ? "" : buildFileDirectory + "/")
        + BUILD_RULES_FILE_NAME;
    if (!projectFilesystem.exists(buildFileDirectory)) {
      if (parseContext.getType() == ParseContext.Type.BUILD_FILE &&
          baseName.equals(parseContext.getBaseName())) {
        throw new BuildTargetParseException(String.format(
            "Internal error: Parsing in the context of %s, but %s does not exist",
            buildFilePath,
            buildFileDirectory));
      } else {
        throw NoSuchBuildTargetException.createForMissingDirectory(buildFileDirectory,
            buildTargetName,
            parseContext);
      }
    }

    // Make sure the build file exists.
    if (!projectFilesystem.exists(buildFilePath)) {
      if (parseContext.getType() == ParseContext.Type.BUILD_FILE &&
          baseName.equals(parseContext.getBaseName())) {
        throw new BuildTargetParseException(String.format(
            "Internal error: Parsing in the context of %s, but %s does not exist",
            buildFilePath,
            buildFilePath));
      } else {
        throw NoSuchBuildTargetException.createForMissingBuildFile(buildFilePath,
            buildTargetName,
            parseContext);
      }
    }

    return new BuildTarget(baseName, shortName);
  }