Function CheckIncludeLine

tools/cpplint.py:5830–5946

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

(filename, clean_lines, linenum, include_state, error)

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"
    # Only do this check if the included header follows google naming
    # conventions.  If not, assume that it's a 3rd party API that
    # requires special include conventions.
    #
    # We also make an exception for Lua headers, which follow google
    # naming convention but not the include convention.
    match = re.match(r'#include\s*"([^/]+\.(.*))"', line)
    if (
        match
        and IsHeaderExtension(match.group(2))
        and not _third_party_headers_pattern.match(match.group(1))
    ):
        error(
            filename,
            linenum,
            "build/include_subdir",
            4,
            "Include the directory when naming header 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)
        used_angle_brackets = match.group(1) == "<"
        duplicate_line = include_state.FindHeader(include)
        if duplicate_line >= 0:
            error(
                filename,
                linenum,
                "build/include",
                4,
                f'"{include}" already included at {filename}:{duplicate_line}',
            )
            return

        for extension in GetNonHeaderExtensions():
            if include.endswith("." + extension) and os.path.dirname(