std::string makeRelativePath()

in facebook-clang-plugins/libtooling/FileUtils.cpp [69:93]

• 24 lines of code
• 8 McCabe index (conditional complexity)

std::string makeRelativePath(const std::string &repoRoot,
                             const std::string &sysRoot,
                             bool keepExternalPaths,
                             bool allowSiblingsToRepoRoot,
                             const std::string &path) {
  if (repoRoot != "") {
    if (llvm::StringRef(path).startswith(repoRoot + "/")) {
      return path.substr(repoRoot.size() + 1);
    }
    if (allowSiblingsToRepoRoot) {
      std::string parentOfRoot = llvm::sys::path::parent_path(repoRoot).str();
      if (llvm::StringRef(path).startswith(parentOfRoot + "/")) {
        return "../" + path.substr(parentOfRoot.size() + 1);
      }
    }
  }
  if (sysRoot != "" && llvm::StringRef(path).startswith(sysRoot + "/")) {
    // Intentionally keep the heading "/" in this case.
    return path.substr(sysRoot.size());
  }
  if (keepExternalPaths) {
    return path;
  }
  return "";
}