How to use the cpplint.FileInfo function in cpplint

def get_header_guard_dmlc(filename):
    """Get Header Guard Convention for DMLC Projects.

    For headers in include, directly use the path
    For headers in src, use project name plus path

    Examples: with project-name = dmlc
        include/dmlc/timer.h -> DMLC_TIMTER_H_
        src/io/libsvm_parser.h -> DMLC_IO_LIBSVM_PARSER_H_
    """
    fileinfo = cpplint.FileInfo(filename)
    file_path_from_root = fileinfo.RepositoryName()
    inc_list = ['include', 'api', 'wrapper', 'contrib']
    if os.name == 'nt':
        inc_list.append("mshadow")

    if file_path_from_root.find('src/') != -1 and _HELPER.project_name is not None:
        idx = file_path_from_root.find('src/')
        file_path_from_root = _HELPER.project_name +  file_path_from_root[idx + 3:]
    else:
        idx = file_path_from_root.find("include/")
        if idx != -1:
            file_path_from_root = file_path_from_root[idx + 8:]
        for spath in inc_list:
            prefix = spath + '/'
            if file_path_from_root.startswith(prefix):
                file_path_from_root = re.sub('^' + prefix, '', file_path_from_root)

def get_header_guard_dmlc(filename):
    """Get Header Guard Convention for DMLC Projects.

    For headers in include, directly use the path
    For headers in src, use project name plus path

    Examples: with project-name = dmlc
        include/dmlc/timer.h -> DMLC_TIMTER_H_
        src/io/libsvm_parser.h -> DMLC_IO_LIBSVM_PARSER_H_
    """
    fileinfo = cpplint.FileInfo(filename)
    file_path_from_root = fileinfo.RepositoryName()
    inc_list = ['include', 'api', 'wrapper', 'contrib']
    if os.name == 'nt':
        inc_list.append("mshadow")

    if file_path_from_root.find('src/') != -1 and _HELPER.project_name is not None:
        idx = file_path_from_root.find('src/')
        file_path_from_root = _HELPER.project_name +  file_path_from_root[idx + 3:]
    else:
        idx = file_path_from_root.find("include/")
        if idx != -1:
            file_path_from_root = file_path_from_root[idx + 8:]
        for spath in inc_list:
            prefix = spath + '/'
            if file_path_from_root.startswith(prefix):
                file_path_from_root = re.sub('^' + prefix, '', file_path_from_root)

def get_header_guard_dmlc(filename):
    """Get Header Guard Convention for DMLC Projects.

    For headers in include, directly use the path
    For headers in src, use project name plus path

    Examples: with project-name = dmlc
        include/dmlc/timer.h -> DMLC_TIMTER_H_
        src/io/libsvm_parser.h -> DMLC_IO_LIBSVM_PARSER_H_
    """
    fileinfo = cpplint.FileInfo(filename)
    file_path_from_root = fileinfo.RepositoryName()
    inc_list = ['include', 'api', 'wrapper', 'contrib']
    if os.name == 'nt':
        inc_list.append("mshadow")

    if file_path_from_root.find('src/') != -1 and _HELPER.project_name is not None:
        idx = file_path_from_root.find('src/')
        file_path_from_root = _HELPER.project_name +  file_path_from_root[idx + 3:]
    else:
        idx = file_path_from_root.find("include/")
        if idx != -1:
            file_path_from_root = file_path_from_root[idx + 8:]
        for spath in inc_list:
            prefix = spath + '/'
            if file_path_from_root.startswith(prefix):
                file_path_from_root = re.sub('^' + prefix, '', file_path_from_root)

"""Returns the CPP variable that should be used as a header guard.

  Args:
    filename: The name of a C++ header file.

  Returns:
    The CPP variable that should be used as a header guard in the
    named file.

  """

  # Restores original filename in case that cpplint is invoked from Emacs's
  # flymake.
  filename = re.sub(r'_flymake\.h$', '.h', filename)

  fileinfo = FileInfo(filename)
  return re.sub(r'[-./\s]', '_', fileinfo.RepositoryName()).upper() + '_'

def CheckIncludeLine(filename, clean_lines, linenum, include_state, error):
  """Check rules that are applicable to #include lines.

  Strings on #include lines are NOT removed from elided line, to make
  certain tasks easier. However, to prevent false positives, checks
  applicable to #include lines in CheckLanguage must be put here.

  Args:
    filename: The name of the current file.
    clean_lines: A CleansedLines instance containing the file.
    linenum: The number of the line to check.
    include_state: An _IncludeState instance in which the headers are inserted.
    error: The function to call with any errors found.
  """
  fileinfo = FileInfo(filename)

  line = clean_lines.lines[linenum]

  # "include" should use the new style "foo/bar.h" instead of just "bar.h"
  if _RE_PATTERN_INCLUDE_NEW_STYLE.search(line):
    error(filename, linenum, 'build/include', 4,
          'Include the directory when naming .h files')

  # we shouldn't include a file more than once. actually, there are a
  # handful of instances where doing so is okay, but in general it's
  # not.
  match = _RE_PATTERN_INCLUDE.search(line)
  if match:
    include = match.group(2)
    is_system = (match.group(1) == '<')
    if include in include_state:

def _CheckChangeLintsClean(input_api, output_api):
  class PrefixedFileInfo(cpplint.FileInfo):
    def RepositoryName(self):
      fullname = self.FullName()
      repo_pos = fullname.find('xwalk/')
      if repo_pos == -1:
        # Something weird happened, bail out.
        return [output_api.PresubmitError(
            'Cannot find "xwalk/" in %s.' % fullname)]
      return fullname[repo_pos:]
  input_api.cpplint.FileInfo = PrefixedFileInfo
  source_filter = lambda filename: input_api.FilterSourceFile(
    filename, white_list=(r'.+\.(cc|h)$',))
  return input_api.canned_checks.CheckChangeLintsClean(
    input_api, output_api, source_filter)

def get_header_guard_dmlc(filename):
    """Get Header Guard Convention for DMLC Projects.

    For headers in include, directly use the path
    For headers in src, use project name plus path

    Examples: with project-name = dmlc
        include/dmlc/timer.h -> DMLC_TIMTER_H_
        src/io/libsvm_parser.h -> DMLC_IO_LIBSVM_PARSER_H_
    """
    fileinfo = cpplint.FileInfo(filename)
    file_path_from_root = fileinfo.RepositoryName()
    inc_list = ['include', 'api', 'wrapper']
    if file_path_from_root.startswith('src') and _HELPER.project_name is not None:
        file_path_from_root = re.sub('^src', _HELPER.project_name, file_path_from_root)
    else:
        for spath in inc_list:
            prefix = spath + '/'
            if file_path_from_root.startswith(prefix):
                file_path_from_root = re.sub('^' + prefix, '', file_path_from_root)
                break
    return re.sub(r'[-./\s]', '_', file_path_from_root).upper() + '_'