code: def is_installable_file(path):
      # type: (PipfileType) -> bool
      
      from packaging import specifiers
  
      if isinstance(path, Mapping):
          path = convert_entry_to_path(path)
  
      # If the string starts with a valid specifier operator, test if it is a valid
      # specifier set before making a path object (to avoid breaking windows)
      if any(path.startswith(spec) for spec in "!=<>~"):
          try:
              specifiers.SpecifierSet(path)
          # If this is not a valid specifier, just move on and try it as a path
          except specifiers.InvalidSpecifier:
              pass
          else:
              return False
  
      parsed = urlparse(path)
      is_local = (
          not parsed.scheme
          or parsed.scheme == "file"
          or (len(parsed.scheme) == 1 and os.name == "nt")
      )
      if parsed.scheme and parsed.scheme == "file":
          path = vistir.compat.fs_decode(vistir.path.url_to_path(path))
      normalized_path = vistir.path.normalize_path(path)
      if is_local and not os.path.exists(normalized_path):
          return False
  
      is_archive = pip_shims.shims.is_archive_file(normalized_path)
      is_local_project = os.path.isdir(normalized_path) and is_installable_dir(
          normalized_path
      )
      if is_local and is_local_project or is_archive:
          return True
  
      if not is_local and pip_shims.shims.is_archive_file(parsed.path):
          return True
  
      return False
docs: Determine if a path can potentially be installed