tools: bump cpplint.py to 1.4.4

Refs: https://github.com/cpplint/cpplint/releases/tag/1.4.4

PR-URL: https://github.com/nodejs/node/pull/27098
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Daniel Bevenius <daniel.bevenius@gmail.com>

1 files changed, 332 insertions, 272 deletions

diff --git a/tools/cpplint.py b/tools/cpplint.py
index aed35f3e0e..81bc98b7ac 100755
--- a/tools/cpplint.py
+++ b/tools/cpplint.py
@@ -52,46 +52,38 @@ import re
 import sre_compile
 import string
 import sys
+import sysconfig
 import unicodedata
 import xml.etree.ElementTree
 
 # if empty, use defaults
-_header_extensions = set([])
-
-# if empty, use defaults
 _valid_extensions = set([])
 
+__VERSION__ = '1.4.4'
 
-# Files with any of these extensions are considered to be
-# header files (and will undergo different style checks).
-# This set can be extended by using the --headers
-# option (also supported in CPPLINT.cfg)
-def GetHeaderExtensions():
-  if not _header_extensions:
-    return set(['h', 'hh', 'hpp', 'hxx', 'h++', 'cuh'])
-  return _header_extensions
-
-# The allowed extensions for file names
-# This is set by --extensions flag
-def GetAllExtensions():
-  if not _valid_extensions:
-    return GetHeaderExtensions().union(set(['c', 'cc', 'cpp', 'cxx', 'c++', 'cu']))
-  return _valid_extensions
-
-def GetNonHeaderExtensions():
-  return GetAllExtensions().difference(GetHeaderExtensions())
+try:
+  xrange          # Python 2
+except NameError:
+  #  -- pylint: disable=redefined-builtin
+  xrange = range  # Python 3
 
 
 _USAGE = """
 Syntax: cpplint.py [--verbose=#] [--output=emacs|eclipse|vs7|junit]
                    [--filter=-x,+y,...]
-                   [--counting=total|toplevel|detailed] [--repository=path]
-                   [--root=subdir] [--linelength=digits] [--recursive]
+                   [--counting=total|toplevel|detailed] [--root=subdir]
+                   [--repository=path]
+                   [--linelength=digits] [--headers=x,y,...]
+                   [--recursive]
                    [--exclude=path]
-                   [--headers=ext1,ext2]
                    [--extensions=hpp,cpp,...]
+                   [--quiet]
+                   [--version]
         <file> [file] ...
 
+  Style checker for C/C++ source files.
+  This is a fork of the Google style checker with minor extensions.
+
   The style guidelines this tries to follow are those in
     https://google.github.io/styleguide/cppguide.html
 
@@ -111,10 +103,10 @@ Syntax: cpplint.py [--verbose=#] [--output=emacs|eclipse|vs7|junit]
   Flags:
 
     output=emacs|eclipse|vs7|junit
-      By default, the output is formatted to ease emacs parsing.  Output
-      compatible with eclipse (eclipse), Visual Studio (vs7), and JUnit
-      XML parsers such as those used in Jenkins and Bamboo may also be
-      used.  Other formats are unsupported.
+      By default, the output is formatted to ease emacs parsing.  Visual Studio
+      compatible output (vs7) may also be used.  Further support exists for
+      eclipse (eclipse), and JUnit (junit). XML parsers such as those used
+      in Jenkins and Bamboo may also be used.  Other formats are unsupported.
 
     verbose=#
       Specify a number 0-5 to restrict errors to certain verbosity levels.
@@ -122,8 +114,7 @@ Syntax: cpplint.py [--verbose=#] [--output=emacs|eclipse|vs7|junit]
       likely to be false positives.
 
     quiet
-      Suppress output other than linting errors, such as information about
-      which files have been processed and excluded.
+      Don't print anything if no errors are found.
 
     filter=-x,+y,...
       Specify a comma-separated list of category-filters to apply: only
@@ -172,19 +163,21 @@ Syntax: cpplint.py [--verbose=#] [--output=emacs|eclipse|vs7|junit]
         Bob   => SRC_CHROME_BROWSER_UI_BROWSER_H_
 
     root=subdir
-      The root directory used for deriving header guard CPP variables. This
-      directory is relative to the top level directory of the repository which
-      by default is determined by searching for a directory that contains .git,
-      .hg, or .svn but can also be controlled with the --repository flag. If
-      the specified directory does not exist, this flag is ignored.
+      The root directory used for deriving header guard CPP variable.
+      This directory is relative to the top level directory of the repository
+      which by default is determined by searching for a directory that contains
+      .git, .hg, or .svn but can also be controlled with the --repository flag.
+      If the specified directory does not exist, this flag is ignored.
 
       Examples:
-        Assuming that src is the top level directory of the repository, the
-        header guard CPP variables for src/chrome/browser/ui/browser.h are:
+        Assuming that src is the top level directory of the repository (and
+        cwd=top/src), the header guard CPP variables for
+        src/chrome/browser/ui/browser.h are:
 
         No flag => CHROME_BROWSER_UI_BROWSER_H_
         --root=chrome => BROWSER_UI_BROWSER_H_
         --root=chrome/browser => UI_BROWSER_H_
+        --root=.. => SRC_CHROME_BROWSER_UI_BROWSER_H_
 
     linelength=digits
       This is the allowed line length for the project. The default value is
@@ -216,13 +209,15 @@ Syntax: cpplint.py [--verbose=#] [--output=emacs|eclipse|vs7|junit]
       Examples:
         --extensions=%s
 
-    headers=extension,extension,...
-      The allowed header extensions that cpplint will consider to be header files
-      (by default, only files with extensions %s
-      will be assumed to be headers)
+    headers=x,y,...
+      The header extensions that cpplint will treat as .h in checks. Values are
+      automatically added to --extensions list.
+     (by default, only files with extensions %s will be assumed to be headers)
 
       Examples:
         --headers=%s
+        --headers=hpp,hxx
+        --headers=hpp
 
     cpplint.py supports per-directory configurations specified in CPPLINT.cfg
     files. CPPLINT.cfg file can contain a number of key=value pairs.
@@ -233,6 +228,7 @@ Syntax: cpplint.py [--verbose=#] [--output=emacs|eclipse|vs7|junit]
       exclude_files=regex
       linelength=80
       root=subdir
+      headers=x,y,...
 
     "set noparent" option prevents cpplint from traversing directory tree
     upwards looking for more .cfg files in parent directories. This option
@@ -246,13 +242,16 @@ Syntax: cpplint.py [--verbose=#] [--output=emacs|eclipse|vs7|junit]
     a file name. If the expression matches, the file is skipped and not run
     through the linter.
 
-    "linelength" specifies the allowed line length for the project.
+    "linelength" allows to specify the allowed line length for the project.
 
     The "root" option is similar in function to the --root flag (see example
-    above).
+    above). Paths are relative to the directory of the CPPLINT.cfg.
+
+    The "headers" option is similar in function to the --headers flag
+    (see example above).
 
     CPPLINT.cfg has an effect on files in the same directory and all
-    subdirectories, unless overridden by a nested configuration file.
+    sub-directories, unless overridden by a nested configuration file.
 
       Example file:
         filter=-build/include_order,+build/include_alpha
@@ -261,11 +260,8 @@ Syntax: cpplint.py [--verbose=#] [--output=emacs|eclipse|vs7|junit]
     The above example disables build/include_order warning and enables
     build/include_alpha as well as excludes all .cc from being
     processed by linter, in the current directory (where the .cfg
-    file is located) and all subdirectories.
-""" % (list(GetAllExtensions()),
-       ','.join(list(GetAllExtensions())),
-       GetHeaderExtensions(),
-       ','.join(GetHeaderExtensions()))
+    file is located) and all sub-directories.
+"""
 
 # We categorize each error message we print.  Here are the categories.
 # We want an explicit list so we can list them all in cpplint --filter=.
@@ -282,10 +278,9 @@ _ERROR_CATEGORIES = [
     'build/forward_decl',
     'build/header_guard',
     'build/include',
+    'build/include_subdir',
     'build/include_alpha',
-    'build/include_inline',
     'build/include_order',
-    'build/include_subdir',
     'build/include_what_you_use',
     'build/namespaces_literals',
     'build/namespaces',
@@ -299,13 +294,11 @@ _ERROR_CATEGORIES = [
     'readability/constructors',
     'readability/fn_size',
     'readability/inheritance',
-    'readability/pointer_notation',
     'readability/multiline_comment',
     'readability/multiline_string',
     'readability/namespace',
     'readability/nolint',
     'readability/nul',
-    'readability/null_usage',
     'readability/strings',
     'readability/todo',
     'readability/utf8',
@@ -356,13 +349,7 @@ _LEGACY_ERROR_CATEGORIES = [
 # flag. By default all errors are on, so only add here categories that should be
 # off by default (i.e., categories that must be enabled by the --filter= flags).
 # All entries here should start with a '-' or '+', as in the --filter= flag.
-_DEFAULT_FILTERS = [
-    '-build/include_alpha',
-    '-build/include_subdir',
-    '-build/include_what_you_use',
-    '-legal/copyright',
-    '-readability/nolint',
-    ]
+_DEFAULT_FILTERS = ['-build/include_alpha']
 
 # The default list of categories suppressed for C (not C++) files.
 _DEFAULT_C_SUPPRESSED_CATEGORIES = [
@@ -635,12 +622,6 @@ _SEARCH_C_FILE = re.compile(r'\b(?:LINT_C_FILE|'
 # Match string that indicates we're working on a Linux Kernel file.
 _SEARCH_KERNEL_FILE = re.compile(r'\b(?:LINT_KERNEL_FILE)')
 
-_NULL_TOKEN_PATTERN = re.compile(r'\bNULL\b')
-
-_RIGHT_LEANING_POINTER_PATTERN = re.compile(r'[^=|(,\s><);&?:}]'
-                                            r'(?<!(sizeof|return))'
-                                            r'\s\*[a-zA-Z_][0-9a-zA-Z_]*')
-
 _regexp_compile_cache = {}
 
 # {str, set(int)}: a map from error categories to sets of linenumbers
@@ -650,6 +631,7 @@ _error_suppressions = {}
 # The root directory used for deriving header guard CPP variable.
 # This is set by --root flag.
 _root = None
+_root_debug = False
 
 # The top level repository directory. If set, _root is calculated relative to
 # this directory instead of the directory containing version control artifacts.
@@ -659,7 +641,7 @@ _repository = None
 # Files to exclude from linting. This is set by the --exclude flag.
 _excludes = None
 
-# Whether to suppress PrintInfo messages
+# Whether to supress PrintInfo messages
 _quiet = False
 
 # The allowed line length of files.
@@ -667,19 +649,13 @@ _quiet = False
 _line_length = 80
 
 try:
-  xrange(1, 0)
-except NameError:
-  #  -- pylint: disable=redefined-builtin
-  xrange = range
-
-try:
   unicode
 except NameError:
   #  -- pylint: disable=redefined-builtin
   basestring = unicode = str
 
 try:
-  long(2)
+  long
 except NameError:
   #  -- pylint: disable=redefined-builtin
   long = int
@@ -700,10 +676,38 @@ def unicode_escape_decode(x):
   else:
     return x
 
+# Treat all headers starting with 'h' equally: .h, .hpp, .hxx etc.
+# This is set by --headers flag.
+_hpp_headers = set(['h', 'hh', 'hpp', 'hxx', 'h++', 'cuh'])
+
 # {str, bool}: a map from error categories to booleans which indicate if the
 # category should be suppressed for every line.
 _global_error_suppressions = {}
 
+def ProcessHppHeadersOption(val):
+  global _hpp_headers
+  try:
+    _hpp_headers = set(val.split(','))
+    # Automatically append to extensions list so it does not have to be set 2 times
+    _valid_extensions.update(_hpp_headers)
+  except ValueError:
+    PrintUsage('Header extensions must be comma separated list.')
+
+def IsHeaderExtension(file_extension):
+  return file_extension in _hpp_headers
+
+def GetHeaderExtensions():
+  return _hpp_headers or ['h']
+
+# The allowed extensions for file names
+# This is set by --extensions flag
+def GetAllExtensions():
+  if not _valid_extensions:
+    return GetHeaderExtensions().union(set(['c', 'cc', 'cpp', 'cxx', 'c++', 'cu']))
+  return _valid_extensions
+
+def GetNonHeaderExtensions():
+  return GetAllExtensions().difference(GetHeaderExtensions())
 
 
 
@@ -837,9 +841,9 @@ class _IncludeState(object):
   # needs to move backwards, CheckNextIncludeOrder will raise an error.
   _INITIAL_SECTION = 0
   _MY_H_SECTION = 1
-  _OTHER_H_SECTION = 2
-  _C_SECTION = 3
-  _CPP_SECTION = 4
+  _C_SECTION = 2
+  _CPP_SECTION = 3
+  _OTHER_H_SECTION = 4
 
   _TYPE_NAMES = {
       _C_SYS_HEADER: 'C system header',
@@ -851,9 +855,9 @@ class _IncludeState(object):
   _SECTION_NAMES = {
       _INITIAL_SECTION: "... nothing. (This can't be an error.)",
       _MY_H_SECTION: 'a header this file implements',
-      _OTHER_H_SECTION: 'other header',
       _C_SECTION: 'C system header',
       _CPP_SECTION: 'C++ system header',
+      _OTHER_H_SECTION: 'other header',
       }
 
   def __init__(self):
@@ -1000,6 +1004,7 @@ class _CppLintState(object):
     self._filters_backup = self.filters[:]
     self.counting = 'total'  # In what way are we counting errors?
     self.errors_by_category = {}  # string to int dict storing error counts
+    self.quiet = False  # Suppress non-error messagess?
 
     # output format:
     # "emacs" - format that emacs can parse (default)
@@ -1017,6 +1022,12 @@ class _CppLintState(object):
     """Sets the output format for errors."""
     self.output_format = output_format
 
+  def SetQuiet(self, quiet):
+    """Sets the module's quiet settings, and returns the previous setting."""
+    last_quiet = self.quiet
+    self.quiet = quiet
+    return last_quiet
+
   def SetVerboseLevel(self, level):
     """Sets the module's verbosity, and returns the previous setting."""
     last_verbose_level = self.verbose_level
@@ -1089,7 +1100,7 @@ class _CppLintState(object):
 
   def PrintInfo(self, message):
     if not _quiet and self.output_format != 'junit':
-      sys.stderr.write(message)
+      sys.stdout.write(message)
 
   def PrintError(self, message):
     if self.output_format == 'junit':
@@ -1157,6 +1168,14 @@ def _SetOutputFormat(output_format):
   """Sets the module's output format."""
   _cpplint_state.SetOutputFormat(output_format)
 
+def _Quiet():
+  """Return's the module's quiet setting."""
+  return _cpplint_state.quiet
+
+def _SetQuiet(quiet):
+  """Set the module's quiet status, and return previous setting."""
+  return _cpplint_state.SetQuiet(quiet)
+
 
 def _VerboseLevel():
   """Returns the module's verbosity setting."""
@@ -1299,12 +1318,54 @@ class FileInfo(object):
     locations won't see bogus errors.
     """
     fullname = self.FullName()
-    # XXX(bnoordhuis) Expects that cpplint.py lives in the tools/ directory.
-    toplevel = os.path.abspath(os.path.join(os.path.dirname(__file__), '..')).replace('\\', '/')
-    toplevel = unicode_escape_decode(toplevel)
-    prefix = os.path.commonprefix([fullname, toplevel])
-    return fullname[len(prefix) + 1:]
-    # End Node.js patch
+
+    if os.path.exists(fullname):
+      project_dir = os.path.dirname(fullname)
+
+      # If the user specified a repository path, it exists, and the file is
+      # contained in it, use the specified repository path
+      if _repository:
+        repo = FileInfo(_repository).FullName()
+        root_dir = project_dir
+        while os.path.exists(root_dir):
+          # allow case insensitive compare on Windows
+          if os.path.normcase(root_dir) == os.path.normcase(repo):
+            return os.path.relpath(fullname, root_dir).replace('\\', '/')
+          one_up_dir = os.path.dirname(root_dir)
+          if one_up_dir == root_dir:
+            break
+          root_dir = one_up_dir
+
+      if os.path.exists(os.path.join(project_dir, ".svn")):
+        # If there's a .svn file in the current directory, we recursively look
+        # up the directory tree for the top of the SVN checkout
+        root_dir = project_dir
+        one_up_dir = os.path.dirname(root_dir)
+        while os.path.exists(os.path.join(one_up_dir, ".svn")):
+          root_dir = os.path.dirname(root_dir)
+          one_up_dir = os.path.dirname(one_up_dir)
+
+        prefix = os.path.commonprefix([root_dir, project_dir])
+        return fullname[len(prefix) + 1:]
+
+      # Not SVN <= 1.6? Try to find a git, hg, or svn top level directory by
+      # searching up from the current path.
+      root_dir = current_dir = os.path.dirname(fullname)
+      while current_dir != os.path.dirname(current_dir):
+        if (os.path.exists(os.path.join(current_dir, ".git")) or
+            os.path.exists(os.path.join(current_dir, ".hg")) or
+            os.path.exists(os.path.join(current_dir, ".svn"))):
+          root_dir = current_dir
+        current_dir = os.path.dirname(current_dir)
+
+      if (os.path.exists(os.path.join(root_dir, ".git")) or
+          os.path.exists(os.path.join(root_dir, ".hg")) or
+          os.path.exists(os.path.join(root_dir, ".svn"))):
+        prefix = os.path.commonprefix([root_dir, project_dir])
+        return fullname[len(prefix) + 1:]
+
+    # Don't know what to do; header guard warnings may be wrong...
+    return fullname
 
   def Split(self):
     """Splits the file into the directory, basename, and extension.
@@ -1390,14 +1451,14 @@ def Error(filename, linenum, category, confidence, message):
   if _ShouldPrintError(category, confidence, linenum):
     _cpplint_state.IncrementErrorCount(category)
     if _cpplint_state.output_format == 'vs7':
-      _cpplint_state.PrintError('%s(%s): warning: %s  [%s] [%d]\n' % (
-          filename, linenum, message, category, confidence))
+      _cpplint_state.PrintError('%s(%s): error cpplint: [%s] %s [%d]\n' % (
+          filename, linenum, category, message, confidence))
     elif _cpplint_state.output_format == 'eclipse':
       sys.stderr.write('%s:%s: warning: %s  [%s] [%d]\n' % (
           filename, linenum, message, category, confidence))
     elif _cpplint_state.output_format == 'junit':
-        _cpplint_state.AddJUnitFailure(filename, linenum, message, category,
-            confidence)
+      _cpplint_state.AddJUnitFailure(filename, linenum, message, category,
+          confidence)
     else:
       final_message = '%s:%s:  %s  [%s] [%d]\n' % (
           filename, linenum, message, category, confidence)
@@ -1913,7 +1974,7 @@ def CheckForCopyright(filename, lines, error):
 
   # We'll say it should occur by line 10. Don't forget there's a
   # dummy line at the front.
-  for line in range(1, min(len(lines), 11)):
+  for line in xrange(1, min(len(lines), 11)):
     if re.search(r'Copyright', lines[line], re.I): break
   else:                       # means no copyright line was found
     error(filename, 0, 'legal/copyright', 5,
@@ -1936,6 +1997,30 @@ def GetIndentLevel(line):
   else:
     return 0
 
+def PathSplitToList(path):
+  """Returns the path split into a list by the separator.
+
+  Args:
+    path: An absolute or relative path (e.g. '/a/b/c/' or '../a')
+
+  Returns:
+    A list of path components (e.g. ['a', 'b', 'c]).
+  """
+  lst = []
+  while True:
+    (head, tail) = os.path.split(path)
+    if head == path:  # absolute paths end
+      lst.append(head)
+      break
+    if tail == path:  # relative paths end
+      lst.append(tail)
+      break
+
+    path = head
+    lst.append(tail)
+
+  lst.reverse()
+  return lst
 
 def GetHeaderGuardCPPVariable(filename):
   """Returns the CPP variable that should be used as a header guard.
@@ -1958,11 +2043,58 @@ def GetHeaderGuardCPPVariable(filename):
 
   fileinfo = FileInfo(filename)
   file_path_from_root = fileinfo.RepositoryName()
-  if _root:
-    # Convert root path to unix format because file_path_from_root is also
-    # in that format and they wouldn't match otherwise on Windows machines
-    root = os.path.normpath(_root).replace('\\', '/')
-    file_path_from_root = re.sub('^' + root + '/', '', file_path_from_root)
+
+  def FixupPathFromRoot():
+    if _root_debug:
+      sys.stderr.write("\n_root fixup, _root = '%s', repository name = '%s'\n"
+          % (_root, fileinfo.RepositoryName()))
+
+    # Process the file path with the --root flag if it was set.
+    if not _root:
+      if _root_debug:
+        sys.stderr.write("_root unspecified\n")
+      return file_path_from_root
+
+    def StripListPrefix(lst, prefix):
+      # f(['x', 'y'], ['w, z']) -> None  (not a valid prefix)
+      if lst[:len(prefix)] != prefix:
+        return None
+      # f(['a, 'b', 'c', 'd'], ['a', 'b']) -> ['c', 'd']
+      return lst[(len(prefix)):]
+
+    # root behavior:
+    #   --root=subdir , lstrips subdir from the header guard
+    maybe_path = StripListPrefix(PathSplitToList(file_path_from_root),
+                                 PathSplitToList(_root))
+
+    if _root_debug:
+      sys.stderr.write(("_root lstrip (maybe_path=%s, file_path_from_root=%s," +
+          " _root=%s)\n") % (maybe_path, file_path_from_root, _root))
+
+    if maybe_path:
+      return os.path.join(*maybe_path)
+
+    #   --root=.. , will prepend the outer directory to the header guard
+    full_path = fileinfo.FullName()
+    root_abspath = os.path.abspath(_root)
+
+    maybe_path = StripListPrefix(PathSplitToList(full_path),
+                                 PathSplitToList(root_abspath))
+
+    if _root_debug:
+      sys.stderr.write(("_root prepend (maybe_path=%s, full_path=%s, " +
+          "root_abspath=%s)\n") % (maybe_path, full_path, root_abspath))
+
+    if maybe_path:
+      return os.path.join(*maybe_path)
+
+    if _root_debug:
+      sys.stderr.write("_root ignore, returning %s\n" % (file_path_from_root))
+
+    #   --root=FAKE_DIR is ignored
+    return file_path_from_root
+
+  file_path_from_root = FixupPathFromRoot()
   return re.sub(r'[^a-zA-Z0-9]', '_', file_path_from_root).upper() + '_'
 
 
@@ -2078,22 +2210,22 @@ def CheckHeaderFileIncluded(filename, include_state, error):
     return
 
   for ext in GetHeaderExtensions():
-      basefilename = filename[0:len(filename) - len(fileinfo.Extension())]
-      headerfile = basefilename + '.' + ext
-      if not os.path.exists(headerfile):
-        continue
-      headername = FileInfo(headerfile).RepositoryName()
-      first_include = None
-      for section_list in include_state.include_list:
-        for f in section_list:
-          if headername in f[0] or f[0] in headername:
-            return
-          if not first_include:
-            first_include = f[1]
+    basefilename = filename[0:len(filename) - len(fileinfo.Extension())]
+    headerfile = basefilename + '.' + ext
+    if not os.path.exists(headerfile):
+      continue
+    headername = FileInfo(headerfile).RepositoryName()
+    first_include = None
+    for section_list in include_state.include_list:
+      for f in section_list:
+        if headername in f[0] or f[0] in headername:
+          return
+        if not first_include:
+          first_include = f[1]
 
-      error(filename, first_include, 'build/include', 5,
-            '%s should include its header file %s' % (fileinfo.RepositoryName(),
-                                                      headername))
+    error(filename, first_include, 'build/include', 5,
+          '%s should include its header file %s' % (fileinfo.RepositoryName(),
+                                                    headername))
 
 
 def CheckForBadCharacters(filename, lines, error):
@@ -2121,21 +2253,6 @@ def CheckForBadCharacters(filename, lines, error):
       error(filename, linenum, 'readability/nul', 5, 'Line contains NUL byte.')
 
 
-def CheckInlineHeader(filename, include_state, error):
-  """Logs an error if both a header and its inline variant are included."""
-
-  all_headers = dict(item for sublist in include_state.include_list
-                     for item in sublist)
-  bad_headers = set('%s.h' % name[:-6] for name in all_headers.keys()
-                    if name.endswith('-inl.h'))
-  bad_headers &= set(all_headers.keys())
-
-  for name in bad_headers:
-    err =  '%s includes both %s and %s-inl.h' % (filename, name, name)
-    linenum = all_headers[name]
-    error(filename, linenum, 'build/include_inline', 5, err)
-
-
 def CheckForNewlineAtEOF(filename, lines, error):
   """Logs an error if there is no newline char at the end of the file.
 
@@ -2981,7 +3098,8 @@ def CheckForNonStandardConstructs(filename, clean_lines, linenum,
   # Look for single-argument constructors that aren't marked explicit.
   # Technically a valid construct, but against style.
   explicit_constructor_match = Match(
-      r'\s+(?:inline\s+)?(explicit\s+)?(?:inline\s+)?%s\s*'
+      r'\s+(?:(?:inline|constexpr)\s+)*(explicit\s+)?'
+      r'(?:(?:inline|constexpr)\s+)*%s\s*'
       r'\(((?:[^()]|\([^()]*\))*)\)'
       % re.escape(base_classname),
       line)
@@ -3192,7 +3310,7 @@ def CheckForFunctionLengths(filename, clean_lines, linenum,
 
   if starting_func:
     body_found = False
-    for start_linenum in range(linenum, clean_lines.NumLines()):
+    for start_linenum in xrange(linenum, clean_lines.NumLines()):
       start_line = lines[start_linenum]
       joined_line += ' ' + start_line.lstrip()
       if Search(r'(;|})', start_line):  # Declarations and trivial functions
@@ -3277,36 +3395,6 @@ def CheckComment(line, filename, linenum, next_line_start, error):
               'Should have a space between // and comment')
 
 
-def CheckAccess(filename, clean_lines, linenum, nesting_state, error):
-  """Checks for improper use of DISALLOW* macros.
-
-  Args:
-    filename: The name of the current file.
-    clean_lines: A CleansedLines instance containing the file.
-    linenum: The number of the line to check.
-    nesting_state: A NestingState instance which maintains information about
-                   the current stack of nested blocks being parsed.
-    error: The function to call with any errors found.
-  """
-  line = clean_lines.elided[linenum]  # get rid of comments and strings
-
-  matched = Match((r'\s*(DISALLOW_COPY_AND_ASSIGN|'
-                   r'DISALLOW_IMPLICIT_CONSTRUCTORS)'), line)
-  if not matched:
-    return
-  if nesting_state.stack and isinstance(nesting_state.stack[-1], _ClassInfo):
-    if nesting_state.stack[-1].access != 'private':
-      error(filename, linenum, 'readability/constructors', 3,
-            '%s must be in the private: section' % matched.group(1))
-
-  else:
-    # Found DISALLOW* macro outside a class declaration, or perhaps it
-    # was used inside a function when it should have been part of the
-    # class declaration.  We could issue a warning here, but it
-    # probably resulted in a compiler error already.
-    pass
-
-
 def CheckSpacing(filename, clean_lines, linenum, nesting_state, error):
   """Checks for the correctness of various spacing issues in the code.
 
@@ -4413,49 +4501,6 @@ def CheckAltTokens(filename, clean_lines, linenum, error):
           'Use operator %s instead of %s' % (
               _ALT_TOKEN_REPLACEMENT[match.group(1)], match.group(1)))
 
-def CheckNullTokens(filename, clean_lines, linenum, error):
-  """Check NULL usage.
-
-  Args:
-    filename: The name of the current file.
-    clean_lines: A CleansedLines instance containing the file.
-    linenum: The number of the line to check.
-    error: The function to call with any errors found.
-  """
-  line = clean_lines.elided[linenum]
-
-  # Avoid preprocessor lines
-  if Match(r'^\s*#', line):
-    return
-
-  if line.find('/*') >= 0 or line.find('*/') >= 0:
-    return
-
-  for match in _NULL_TOKEN_PATTERN.finditer(line):
-    error(filename, linenum, 'readability/null_usage', 2,
-          'Use nullptr instead of NULL')
-
-def CheckLeftLeaningPointer(filename, clean_lines, linenum, error):
-  """Check for left-leaning pointer placement.
-
-  Args:
-    filename: The name of the current file.
-    clean_lines: A CleansedLines instance containing the file.
-    linenum: The number of the line to check.
-    error: The function to call with any errors found.
-  """
-  line = clean_lines.elided[linenum]
-
-  # Avoid preprocessor lines
-  if Match(r'^\s*#', line):
-    return
-
-  if '/*' in line or '*/' in line:
-    return
-
-  for match in _RIGHT_LEANING_POINTER_PATTERN.finditer(line):
-    error(filename, linenum, 'readability/pointer_notation', 2,
-          'Use left leaning pointer instead of right leaning')
 
 def GetLineWidth(line):
   """Determines the width of the line in column positions.
@@ -4473,6 +4518,16 @@ def GetLineWidth(line):
       if unicodedata.east_asian_width(uc) in ('W', 'F'):
         width += 2
       elif not unicodedata.combining(uc):
+        # Issue 337
+        # https://mail.python.org/pipermail/python-list/2012-August/628809.html
+        if (sys.version_info.major, sys.version_info.minor) <= (3, 2):
+          # https://github.com/python/cpython/blob/2.7/Include/unicodeobject.h#L81
+          is_wide_build = sysconfig.get_config_var("Py_UNICODE_SIZE") >= 4
+          # https://github.com/python/cpython/blob/2.7/Objects/unicodeobject.c#L564
+          is_low_surrogate = 0xDC00 <= ord(uc) <= 0xDFFF
+          if not is_wide_build and is_low_surrogate:
+            width -= 1
+
         width += 1
     return width
   else:
@@ -4508,10 +4563,6 @@ def CheckStyle(filename, clean_lines, linenum, file_extension, nesting_state,
     error(filename, linenum, 'whitespace/tab', 1,
           'Tab found; better to use spaces')
 
-  if line.find('template<') != -1:
-    error(filename, linenum, 'whitespace/template', 1,
-          'Leave a single space after template, as in `template <...>`')
-
   # One or three blank spaces at the beginning of the line is weird; it's
   # hard to reconcile that with 2-space indents.
   # NOTE: here are the conditions rob pike used for his tests.  Mine aren't
@@ -4550,7 +4601,7 @@ def CheckStyle(filename, clean_lines, linenum, file_extension, nesting_state,
 
   # Check if the line is a header guard.
   is_header_guard = False
-  if file_extension in GetHeaderExtensions():
+  if IsHeaderExtension(file_extension):
     cppvar = GetHeaderGuardCPPVariable(filename)
     if (line.startswith('#ifndef %s' % cppvar) or
         line.startswith('#define %s' % cppvar) or
@@ -4596,7 +4647,6 @@ def CheckStyle(filename, clean_lines, linenum, file_extension, nesting_state,
   CheckBraces(filename, clean_lines, linenum, error)
   CheckTrailingSemicolon(filename, clean_lines, linenum, error)
   CheckEmptyBlockBody(filename, clean_lines, linenum, error)
-  CheckAccess(filename, clean_lines, linenum, nesting_state, error)
   CheckSpacing(filename, clean_lines, linenum, nesting_state, error)
   CheckOperatorSpacing(filename, clean_lines, linenum, error)
   CheckParenthesisSpacing(filename, clean_lines, linenum, error)
@@ -4605,8 +4655,6 @@ def CheckStyle(filename, clean_lines, linenum, file_extension, nesting_state,
   CheckSpacingForFunctionCall(filename, clean_lines, linenum, error)
   CheckCheck(filename, clean_lines, linenum, error)
   CheckAltTokens(filename, clean_lines, linenum, error)
-  CheckNullTokens(filename, clean_lines, linenum, error)
-  CheckLeftLeaningPointer(filename, clean_lines, linenum, error)
   classinfo = nesting_state.InnermostClass()
   if classinfo:
     CheckSectionSpacing(filename, clean_lines, classinfo, linenum, error)
@@ -4681,7 +4729,7 @@ def _ClassifyInclude(fileinfo, include, is_system):
 
   # Headers with C++ extensions shouldn't be considered C system headers
   if is_system and os.path.splitext(include)[1] in ['.hpp', '.hxx', '.h++']:
-      is_system = False
+    is_system = False
 
   if is_system:
     if is_cpp_h:
@@ -4771,10 +4819,11 @@ def CheckIncludeLine(filename, clean_lines, linenum, include_state, error):
       include_state.include_list[-1].append((include, linenum))
 
       # We want to ensure that headers appear in the right order:
-      # 1) for foo.cc, foo.h
-      # 2) other project headers
-      # 3) c system files
-      # 4) cpp system files
+      # 1) for foo.cc, foo.h  (preferred location)
+      # 2) c system files
+      # 3) cpp system files
+      # 4) for foo.cc, foo.h  (deprecated location)
+      # 5) other google headers
       #
       # We classify each include statement as one of those 5 types
       # using a number of techniques. The include_state object keeps
@@ -4920,7 +4969,7 @@ def CheckLanguage(filename, clean_lines, linenum, file_extension,
   CheckGlobalStatic(filename, clean_lines, linenum, error)
   CheckPrintf(filename, clean_lines, linenum, error)
 
-  if file_extension in GetHeaderExtensions():
+  if IsHeaderExtension(file_extension):
     # TODO(unknown): check that 1-arg constructors are explicit.
     #                How to tell it's a constructor?
     #                (handled in CheckForNonStandardConstructs for now)
@@ -5032,7 +5081,7 @@ def CheckLanguage(filename, clean_lines, linenum, file_extension,
   # Check for use of unnamed namespaces in header files.  Registration
   # macros are typically OK, so we allow use of "namespace {" on lines
   # that end with backslashes.
-  if (file_extension in GetHeaderExtensions()
+  if (IsHeaderExtension(file_extension)
       and Search(r'\bnamespace\s*{', line)
       and line[-1] != '\\'):
     error(filename, linenum, 'build/namespaces', 4,
@@ -5598,7 +5647,7 @@ _re_pattern_headers_maybe_templates = []
 for _header, _templates in _HEADERS_MAYBE_TEMPLATES:
   for _template in _templates:
     # Match max<type>(..., ...), max(..., ...), but not foo->max, foo.max or
-    # type::max().
+    # 'type::max()'.
     _re_pattern_headers_maybe_templates.append(
         (re.compile(r'[^>.]\b' + _template + r'(<.*?>)?\([^\)]'),
             _template,
@@ -5648,7 +5697,7 @@ def FilesBelongToSameModule(filename_cc, filename_h):
     return (False, '')
 
   fileinfo_h = FileInfo(filename_h)
-  if not fileinfo_h.Extension().lstrip('.') in GetHeaderExtensions():
+  if not IsHeaderExtension(fileinfo_h.Extension().lstrip('.')):
     return (False, '')
 
   filename_cc = filename_cc[:-(len(fileinfo_cc.Extension()))]
@@ -5720,7 +5769,7 @@ def CheckForIncludeWhatYouUse(filename, clean_lines, include_state, error,
   required = {}  # A map of header name to linenumber and the template entity.
                  # Example of required: { '<functional>': (1219, 'less<>') }
 
-  for linenum in range(clean_lines.NumLines()):
+  for linenum in xrange(clean_lines.NumLines()):
     line = clean_lines.elided[linenum]
     if not line or line[0] == '#':
       continue
@@ -6126,10 +6175,10 @@ def ProcessFileData(filename, file_extension, lines, error,
   RemoveMultiLineComments(filename, lines, error)
   clean_lines = CleansedLines(lines)
 
-  if file_extension in GetHeaderExtensions():
+  if IsHeaderExtension(file_extension):
     CheckForHeaderGuard(filename, clean_lines, error)
 
-  for line in range(clean_lines.NumLines()):
+  for line in xrange(clean_lines.NumLines()):
     ProcessLine(filename, file_extension, clean_lines, line,
                 include_state, function_state, nesting_state, error,
                 extra_check_functions)
@@ -6148,8 +6197,6 @@ def ProcessFileData(filename, file_extension, lines, error,
 
   CheckForNewlineAtEOF(filename, lines, error)
 
-  CheckInlineHeader(filename, include_state, error)
-
 def ProcessConfigOverrides(filename):
   """ Loads the configuration files and processes the config overrides.
 
@@ -6197,37 +6244,35 @@ def ProcessConfigOverrides(filename):
             if base_name:
               pattern = re.compile(val)
               if pattern.match(base_name):
-                _cpplint_state.PrintInfo('Ignoring "%s": file excluded by '
-                    '"%s". File path component "%s" matches pattern "%s"\n' %
-                    (filename, cfg_file, base_name, val))
+                if _cpplint_state.quiet:
+                  # Suppress "Ignoring file" warning when using --quiet.
+                  return False
+                _cpplint_state.PrintInfo('Ignoring "%s": file excluded by "%s". '
+                                 'File path component "%s" matches '
+                                 'pattern "%s"\n' %
+                                 (filename, cfg_file, base_name, val))
                 return False
           elif name == 'linelength':
             global _line_length
             try:
-                _line_length = int(val)
+              _line_length = int(val)
             except ValueError:
-                _cpplint_state.PrintError('Line length must be numeric.')
+              _cpplint_state.PrintError('Line length must be numeric.')
           elif name == 'extensions':
-              global _valid_extensions
-              try:
-                  extensions = [ext.strip() for ext in val.split(',')]
-                  _valid_extensions = set(extensions)
-              except ValueError:
-                  sys.stderr.write('Extensions should be a comma-separated list of values;'
-                                   'for example: extensions=hpp,cpp\n'
-                                   'This could not be parsed: "%s"' % (val,))
-          elif name == 'headers':
-              global _header_extensions
-              try:
-                  extensions = [ext.strip() for ext in val.split(',')]
-                  _header_extensions = set(extensions)
-              except ValueError:
-                  sys.stderr.write('Extensions should be a comma-separated list of values;'
-                                   'for example: extensions=hpp,cpp\n'
-                                   'This could not be parsed: "%s"' % (val,))
+            global _valid_extensions
+            try:
+              extensions = [ext.strip() for ext in val.split(',')]
+              _valid_extensions = set(extensions)
+            except ValueError:
+              sys.stderr.write('Extensions should be a comma-separated list of values;'
+                               'for example: extensions=hpp,cpp\n'
+                               'This could not be parsed: "%s"' % (val,))
           elif name == 'root':
             global _root
-            _root = val
+            # root directories are specified relative to CPPLINT.cfg dir.
+            _root = os.path.join(os.path.dirname(cfg_file), val)
+          elif name == 'headers':
+            ProcessHppHeadersOption(val)
           else:
             _cpplint_state.PrintError(
                 'Invalid configuration option (%s) in file %s\n' %
@@ -6241,7 +6286,7 @@ def ProcessConfigOverrides(filename):
   # Apply all the accumulated filters in reverse order (top-level directory
   # config options having the least priority).
   for cfg_filter in reversed(cfg_filters):
-     _AddFilters(cfg_filter)
+    _AddFilters(cfg_filter)
 
   return True
 
@@ -6262,6 +6307,7 @@ def ProcessFile(filename, vlevel, extra_check_functions=None):
 
   _SetVerboseLevel(vlevel)
   _BackupFilters()
+  old_errors = _cpplint_state.error_count
 
   if not ProcessConfigOverrides(filename):
     _RestoreFilters()
@@ -6330,7 +6376,10 @@ def ProcessFile(filename, vlevel, extra_check_functions=None):
         Error(filename, linenum, 'whitespace/newline', 1,
               'Unexpected \\r (^M) found; better to use only \\n')
 
-  _cpplint_state.PrintInfo('Done processing %s\n' % filename)
+  # Suppress printing anything if --quiet was passed unless the error
+  # count has increased after processing this file.
+  if not _cpplint_state.quiet or old_errors != _cpplint_state.error_count:
+    _cpplint_state.PrintInfo('Done processing %s\n' % filename)
   _RestoreFilters()
 
 
@@ -6340,13 +6389,21 @@ def PrintUsage(message):
   Args:
     message: The optional error message.
   """
-  sys.stderr.write(_USAGE)
+  sys.stderr.write(_USAGE  % (list(GetAllExtensions()),
+       ','.join(list(GetAllExtensions())),
+       GetHeaderExtensions(),
+       ','.join(GetHeaderExtensions())))
 
   if message:
     sys.exit('\nFATAL ERROR: ' + message)
   else:
     sys.exit(0)
 
+def PrintVersion():
+  sys.stdout.write('Cpplint fork (https://github.com/cpplint/cpplint)\n')
+  sys.stdout.write('cpplint ' + __VERSION__ + '\n')
+  sys.stdout.write('Python ' + sys.version + '\n')
+  sys.exit(0)
 
 def PrintCategories():
   """Prints a list of all the error-categories used by error messages.
@@ -6370,6 +6427,8 @@ def ParseArguments(args):
   """
   try:
     (opts, filenames) = getopt.getopt(args, '', ['help', 'output=', 'verbose=',
+                                                 'v=',
+                                                 'version',
                                                  'counting=',
                                                  'filter=',
                                                  'root=',
@@ -6377,27 +6436,32 @@ def ParseArguments(args):
                                                  'linelength=',
                                                  'extensions=',
                                                  'exclude=',
+                                                 'recursive',
                                                  'headers=',
-                                                 'quiet',
-                                                 'recursive'])
+                                                 'quiet'])
   except getopt.GetoptError:
     PrintUsage('Invalid arguments.')
 
   verbosity = _VerboseLevel()
   output_format = _OutputFormat()
   filters = ''
+  quiet = _Quiet()
   counting_style = ''
   recursive = False
 
   for (opt, val) in opts:
     if opt == '--help':
       PrintUsage(None)
+    if opt == '--version':
+      PrintVersion()
     elif opt == '--output':
       if val not in ('emacs', 'vs7', 'eclipse', 'junit'):
         PrintUsage('The only allowed output formats are emacs, vs7, eclipse '
                    'and junit.')
       output_format = val
-    elif opt == '--verbose':
+    elif opt == '--quiet':
+      quiet = True
+    elif opt == '--verbose' or opt == '--v':
       verbosity = int(val)
     elif opt == '--filter':
       filters = val
@@ -6429,18 +6493,11 @@ def ParseArguments(args):
       try:
         _valid_extensions = set(val.split(','))
       except ValueError:
-          PrintUsage('Extensions must be comma seperated list.')
-    elif opt == '--headers':
-      global _header_extensions
-      try:
-          _header_extensions = set(val.split(','))
-      except ValueError:
         PrintUsage('Extensions must be comma seperated list.')
+    elif opt == '--headers':
+      ProcessHppHeadersOption(val)
     elif opt == '--recursive':
       recursive = True
-    elif opt == '--quiet':
-      global _quiet
-      _quiet = True
 
   if not filenames:
     PrintUsage('No files were specified.')
@@ -6452,6 +6509,7 @@ def ParseArguments(args):
     filenames = _FilterExcludedFiles(filenames)
 
   _SetOutputFormat(output_format)
+  _SetQuiet(quiet)
   _SetVerboseLevel(verbosity)
   _SetFilters(filters)
   _SetCountingStyle(counting_style)
@@ -6472,21 +6530,21 @@ def _ExpandDirectories(filenames):
   """
   expanded = set()
   for filename in filenames:
-      if not os.path.isdir(filename):
-        expanded.add(filename)
-        continue
+    if not os.path.isdir(filename):
+      expanded.add(filename)
+      continue
 
-      for root, _, files in os.walk(filename):
-        for loopfile in files:
-          fullname = os.path.join(root, loopfile)
-          if fullname.startswith('.' + os.path.sep):
-            fullname = fullname[len('.' + os.path.sep):]
-          expanded.add(fullname)
+    for root, _, files in os.walk(filename):
+      for loopfile in files:
+        fullname = os.path.join(root, loopfile)
+        if fullname.startswith('.' + os.path.sep):
+          fullname = fullname[len('.' + os.path.sep):]
+        expanded.add(fullname)
 
   filtered = []
   for filename in expanded:
-      if os.path.splitext(filename)[1][1:] in GetAllExtensions():
-          filtered.append(filename)
+    if os.path.splitext(filename)[1][1:] in GetAllExtensions():
+      filtered.append(filename)
 
   return filtered
 
@@ -6508,7 +6566,9 @@ def main():
     _cpplint_state.ResetErrorCounts()
     for filename in filenames:
       ProcessFile(filename, _cpplint_state.verbose_level)
-    _cpplint_state.PrintErrorCounts()
+    # If --quiet is passed, suppress printing error count unless there are errors.
+    if not _cpplint_state.quiet or _cpplint_state.error_count > 0:
+      _cpplint_state.PrintErrorCounts()
 
     if _cpplint_state.output_format == 'junit':
       sys.stderr.write(_cpplint_state.FormatJUnitXML())