Drop py2 support in various files

python3 is the only supported version of python in depot_tools.
Remove py2 support from files including:
  * cpplint.py
  * subprocess2.py
  * many tests and testing_support files

Bug: 1475402
Change-Id: I67a98188bc13c4dc119e6158a37bd236bfd6ea70
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/4824474
Commit-Queue: Gavin Mak <gavinmak@google.com>
Reviewed-by: Josip Sokcevic <sokcevic@chromium.org>
Reviewed-by: Scott Lee <ddoman@chromium.org>

cpplint.py

@@ -3949,9 +3949,8 @@ def CheckBraces(filename, clean_lines, linenum, error):
     # following line if it is part of an array initialization and would not fit
     # within the 80 character limit of the preceding line.
     prevline = GetPreviousNonBlankLine(clean_lines, linenum)[0]
-    if (not Search(r'[,;:}{(]\s*$', prevline) and
-        not Match(r'\s*#', prevline) and
-        not (GetLineWidth(prevline) > _line_length - 2 and '[]' in prevline)):
+    if (not Search(r'[,;:}{(]\s*$', prevline) and not Match(r'\s*#', prevline)
+        and not (len(prevline) > _line_length - 2 and '[]' in prevline)):
       error(filename, linenum, 'whitespace/braces', 4,
             '{ should almost always be at the end of the previous line')
 
@@ -4467,28 +4466,6 @@ def CheckAltTokens(filename, clean_lines, linenum, error):
               _ALT_TOKEN_REPLACEMENT[match.group(1)], match.group(1)))
 
 
-def GetLineWidth(line):
-  """Determines the width of the line in column positions.
-
-  Args:
-    line: A string, which may be a Unicode string.
-
-  Returns:
-    The width of the line in column positions, accounting for Unicode
-    combining characters and wide characters.
-  """
-  if sys.version_info == 2 and isinstance(line, unicode):
-    width = 0
-    for uc in unicodedata.normalize('NFC', line):
-      if unicodedata.east_asian_width(uc) in ('W', 'F'):
-        width += 2
-      elif not unicodedata.combining(uc):
-        width += 1
-    return width
-  else:
-    return len(line)
-
-
 def CheckStyle(filename, clean_lines, linenum, file_extension, nesting_state,
                error):
   """Checks rules from the 'C++ style rules' section of cppguide.html.
@@ -4574,8 +4551,7 @@ def CheckStyle(filename, clean_lines, linenum, file_extension, nesting_state,
       not Match(r'^\s*//.*http(s?)://\S*$', line) and
       not Match(r'^\s*//\s*[^\s]*$', line) and
       not Match(r'^// \$Id:.*#[0-9]+ \$$', line)):
-    line_width = GetLineWidth(line)
-    if line_width > _line_length:
+    if len(line) > _line_length:
       error(filename, linenum, 'whitespace/line_length', 2,
             'Lines should be <= %i characters long' % _line_length)
 

fetch.py

@@ -115,8 +115,7 @@ class GclientGitCheckout(GclientCheckout, GitCheckout):
 
   def _format_spec(self):
     def _format_literal(lit):
-      if isinstance(lit, str) or (sys.version_info.major == 2 and
-                                  isinstance(lit, unicode)):
+      if isinstance(lit, str):
         return '"%s"' % lit
       if isinstance(lit, list):
         return '[%s]' % ', '.join(_format_literal(i) for i in lit)

fix_encoding.py

@@ -14,10 +14,6 @@ import os
 import sys
 
 
-# Prevents initializing multiple times.
-_SYS_ARGV_PROCESSED = False
-
-
 def complain(message):
   """If any exception occurs in this file, we'll probably try to print it
   on stderr, which makes for frustrating debugging if stderr is directed
@@ -72,63 +68,6 @@ def fix_default_encoding():
 ###############################
 # Windows specific
 
-
-def fix_win_sys_argv(encoding):
-  """Converts sys.argv to 'encoding' encoded string.
-
-  utf-8 is recommended.
-
-  Works around <http://bugs.python.org/issue2128>.
-  """
-  global _SYS_ARGV_PROCESSED
-  if _SYS_ARGV_PROCESSED:
-    return False
-
-  if sys.version_info.major == 3:
-    _SYS_ARGV_PROCESSED = True
-    return True
-
-  # These types are available on linux but not Mac.
-  # pylint: disable=no-name-in-module,F0401
-  from ctypes import byref, c_int, POINTER, windll, WINFUNCTYPE
-  from ctypes.wintypes import LPCWSTR, LPWSTR
-
-  # <http://msdn.microsoft.com/en-us/library/ms683156.aspx>
-  GetCommandLineW = WINFUNCTYPE(LPWSTR)(('GetCommandLineW', windll.kernel32))
-  # <http://msdn.microsoft.com/en-us/library/bb776391.aspx>
-  CommandLineToArgvW = WINFUNCTYPE(POINTER(LPWSTR), LPCWSTR, POINTER(c_int))(
-      ('CommandLineToArgvW', windll.shell32))
-
-  argc = c_int(0)
-  argv_unicode = CommandLineToArgvW(GetCommandLineW(), byref(argc))
-  argv = [
-      argv_unicode[i].encode(encoding, 'replace') for i in range(0, argc.value)
-  ]
-
-  if not hasattr(sys, 'frozen'):
-    # If this is an executable produced by py2exe or bbfreeze, then it
-    # will have been invoked directly. Otherwise, unicode_argv[0] is the
-    # Python interpreter, so skip that.
-    argv = argv[1:]
-
-    # Also skip option arguments to the Python interpreter.
-    while len(argv) > 0:
-      arg = argv[0]
-      if not arg.startswith(b'-') or arg == b'-':
-        break
-      argv = argv[1:]
-      if arg == u'-m':
-        # sys.argv[0] should really be the absolute path of the
-        # module source, but never mind.
-        break
-      if arg == u'-c':
-        argv[0] = u'-c'
-        break
-  sys.argv = argv
-  _SYS_ARGV_PROCESSED = True
-  return True
-
-
 def fix_win_codec():
   """Works around <http://bugs.python.org/issue6058>."""
   # <http://msdn.microsoft.com/en-us/library/dd317756.aspx>
@@ -216,10 +155,7 @@ class WinUnicodeConsoleOutput(WinUnicodeOutputBase):
 
   def write(self, text):
     try:
-      if sys.version_info.major == 2 and not isinstance(text, unicode):
-        # Convert to unicode.
-        text = str(text).decode(self.encoding, 'replace')
-      elif sys.version_info.major == 3 and isinstance(text, bytes):
+      if isinstance(text, bytes):
         # Bytestrings need to be decoded to a string before being passed to
         # Windows.
         text = text.decode(self.encoding, 'replace')
@@ -270,10 +206,7 @@ class WinUnicodeOutput(WinUnicodeOutputBase):
 
   def write(self, text):
     try:
-      if sys.version_info.major == 2 and isinstance(text, unicode):
-        # Replace characters that cannot be printed instead of failing.
-        text = text.encode(self.encoding, 'replace')
-      if sys.version_info.major == 3 and isinstance(text, bytes):
+      if isinstance(text, bytes):
         # Replace characters that cannot be printed instead of failing.
         text = text.decode(self.encoding, 'replace')
       # When redirecting to a file or process any \n characters will be replaced
@@ -385,6 +318,5 @@ def fix_encoding():
 
   if sys.platform == 'win32':
     encoding = sys.getdefaultencoding()
-    ret &= fix_win_sys_argv(encoding)
     ret &= fix_win_console(encoding)
   return ret

recipes/recipe_modules/bot_update/resources/bot_update.py

@@ -533,11 +533,9 @@ def get_total_disk_space():
   if sys.platform.startswith('win'):
     _, total, free = (ctypes.c_ulonglong(), ctypes.c_ulonglong(), \
                       ctypes.c_ulonglong())
-    if sys.version_info >= (3,) or isinstance(cwd, unicode):
-      fn = ctypes.windll.kernel32.GetDiskFreeSpaceExW
-    else:
-      fn = ctypes.windll.kernel32.GetDiskFreeSpaceExA
-    ret = fn(cwd, ctypes.byref(_), ctypes.byref(total), ctypes.byref(free))
+    ret = ctypes.windll.kernel32.GetDiskFreeSpaceExW(cwd, ctypes.byref(_),
+                                                     ctypes.byref(total),
+                                                     ctypes.byref(free))
     if ret == 0:
       # WinError() will fetch the last error code.
       raise ctypes.WinError()

subprocess2.py

@@ -15,21 +15,11 @@ import subprocess
 import sys
 import threading
 
-# Cache the string-escape codec to ensure subprocess can find it later.
-# See crbug.com/912292#c2 for context.
-if sys.version_info.major == 2:
-  codecs.lookup('string-escape')
-  # Sends stdout or stderr to os.devnull.
-  DEVNULL = open(os.devnull, 'r+')
-else:
-  # pylint: disable=redefined-builtin
-  basestring = (str, bytes)
-  DEVNULL = subprocess.DEVNULL
-
 
 # Constants forwarded from subprocess.
 PIPE = subprocess.PIPE
 STDOUT = subprocess.STDOUT
+DEVNULL = subprocess.DEVNULL
 
 
 class CalledProcessError(subprocess.CalledProcessError):
@@ -122,7 +112,7 @@ class Popen(subprocess.Popen):
     env = get_english_env(kwargs.get('env'))
     if env:
       kwargs['env'] = env
-    if kwargs.get('env') is not None and sys.version_info.major != 2:
+    if kwargs.get('env') is not None:
       # Subprocess expects environment variables to be strings in Python 3.
       def ensure_str(value):
         if isinstance(value, bytes):
@@ -140,7 +130,7 @@ class Popen(subprocess.Popen):
       # the list.
       kwargs['shell'] = bool(sys.platform=='win32')
 
-    if isinstance(args, basestring):
+    if isinstance(args, (str, bytes)):
       tmp_str = args
     elif isinstance(args, (list, tuple)):
       tmp_str = ' '.join(args)
@@ -183,7 +173,7 @@ def communicate(args, **kwargs):
   stdin = None
   # When stdin is passed as an argument, use it as the actual input data and
   # set the Popen() parameter accordingly.
-  if 'stdin' in kwargs and isinstance(kwargs['stdin'], basestring):
+  if 'stdin' in kwargs and isinstance(kwargs['stdin'], (str, bytes)):
     stdin = kwargs['stdin']
     kwargs['stdin'] = PIPE
 
@@ -245,7 +235,6 @@ def check_output(args, **kwargs):
   Captures stdout of a process call and returns stdout only.
 
   - Throws if return code is not 0.
-  - Works even prior to python 2.7.
   - Blocks stdin by default if not specified since no output will be visible.
   - As per doc, "The stdout argument is not allowed as it is used internally."
   """

testing_support/filesystem_mock.py

@@ -6,11 +6,6 @@ import errno
 import fnmatch
 import os
 import re
-import sys
-
-if sys.version_info.major == 2:
-  from StringIO import StringIO
-else:
 from io import StringIO
 
 

testing_support/subprocess2_test_script.py

@@ -38,17 +38,9 @@ if args:
 
 def do(string):
   if options.stdout:
-    if sys.version_info.major == 2:
-      sys.stdout.write(string.upper())
-      sys.stdout.write(options.eol)
-    else:
     sys.stdout.buffer.write(string.upper().encode('utf-8'))
     sys.stdout.buffer.write(options.eol.encode('utf-8'))
   if options.stderr:
-    if sys.version_info.major == 2:
-      sys.stderr.write(string.lower())
-      sys.stderr.write(options.eol)
-    else:
     sys.stderr.buffer.write(string.lower().encode('utf-8'))
     sys.stderr.buffer.write(options.eol.encode('utf-8'))
     sys.stderr.flush()

tests/auth_test.py

@@ -11,13 +11,7 @@ import json
 import os
 import unittest
 import sys
-
-if sys.version_info.major == 2:
-  import mock
-  BUILTIN_OPEN = '__builtin__.open'
-else:
 from unittest import mock
-  BUILTIN_OPEN = 'builtins.open'
 
 sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
 
@@ -121,7 +115,7 @@ class AccessTokenTest(unittest.TestCase):
 class HasLuciContextLocalAuthTest(unittest.TestCase):
   def setUp(self):
     mock.patch('os.environ').start()
-    mock.patch(BUILTIN_OPEN, mock.mock_open()).start()
+    mock.patch('builtins.open', mock.mock_open()).start()
     self.addCleanup(mock.patch.stopall)
 
   def testNoLuciContextEnvVar(self):

tests/detect_host_arch_test.py

@@ -7,10 +7,6 @@ import os
 import platform
 import sys
 import unittest
-
-if sys.version_info.major == 2:
-  import mock
-else:
 from unittest import mock
 
 sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))

tests/fetch_test.py

@@ -13,13 +13,6 @@ import subprocess
 import sys
 import tempfile
 import unittest
-
-import distutils
-
-if sys.version_info.major == 2:
-  from StringIO import StringIO
-  import mock
-else:
 from io import StringIO
 from unittest import mock
 

tests/gclient_utils_test.py

@@ -39,10 +39,6 @@ class CheckCallAndFilterTestCase(unittest.TestCase):
     self.printfn = io.StringIO()
     self.stdout = io.BytesIO()
     self.kids = []
-    if sys.version_info.major == 2:
-      mock.patch('sys.stdout', self.stdout).start()
-      mock.patch('__builtin__.print', self.printfn.write).start()
-    else:
     mock.patch('sys.stdout', mock.Mock()).start()
     mock.patch('sys.stdout.buffer', self.stdout).start()
     mock.patch('sys.stdout.isatty', return_value=False).start()

tests/lockfile_test.py

@@ -11,13 +11,8 @@ import sys
 import tempfile
 import threading
 import unittest
-
-if sys.version_info.major == 2:
-  import mock
-  import Queue
-else:
 from unittest import mock
-  import queue as Queue
+import queue
 
 DEPOT_TOOLS_ROOT = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
 sys.path.insert(0, DEPOT_TOOLS_ROOT)
@@ -48,9 +43,9 @@ class LockTest(unittest.TestCase):
     to acquire the same file lock with timeout.'''
     # Queues q_f1 and q_sleep are used to controll execution of individual
     # threads.
-    q_f1 = Queue.Queue()
-    q_sleep = Queue.Queue()
-    results = Queue.Queue()
+    q_f1 = queue.Queue()
+    q_sleep = queue.Queue()
+    results = queue.Queue()
 
     def side_effect(arg):
       '''side_effect is called when with l.lock is blocked. In this unit test

tests/rdb_wrapper_test.py

@@ -11,15 +11,9 @@ import contextlib
 import json
 import logging
 import os
-import requests
 import sys
 import tempfile
-import time
 import unittest
-
-if sys.version_info.major == 2:
-  import mock
-else:
 from unittest import mock
 
 sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))

tests/scm_unittest.py

@@ -9,10 +9,6 @@ import logging
 import os
 import sys
 import unittest
-
-if sys.version_info.major == 2:
-  import mock
-else:
 from unittest import mock
 
 sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))

tests/subcommand_test.py

@@ -6,10 +6,6 @@
 import os
 import sys
 import unittest
-
-if sys.version_info.major == 2:
-  import mock
-else:
 from unittest import mock
 
 _ROOT = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))

tests/subprocess2_test.py

@@ -8,10 +8,6 @@
 import os
 import sys
 import unittest
-
-if sys.version_info.major == 2:
-  import mock
-else:
 from unittest import mock
 
 DEPOT_TOOLS = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
@@ -84,11 +80,8 @@ class DefaultsTest(unittest.TestCase):
 
   @mock.patch('subprocess.Popen.__init__')
   def test_env_type(self, mockPopen):
-    if sys.version_info.major != 2:
     subprocess2.Popen(['foo'], env={b'key': b'value'})
-      mockPopen.assert_called_with(['foo'],
-                                   env={'key': 'value'},
-                                   shell=mock.ANY)
+    mockPopen.assert_called_with(['foo'], env={'key': 'value'}, shell=mock.ANY)
 
 
 def _run_test(with_subprocess=True):
@@ -130,13 +123,8 @@ class SmokeTests(unittest.TestCase):
   def _check_exception(self, subp, e, stdout, stderr, returncode):
     """On exception, look if the exception members are set correctly."""
     self.assertEqual(returncode, e.returncode)
-    if subp is subprocess2 or sys.version_info.major == 3:
     self.assertEqual(stdout, e.stdout)
     self.assertEqual(stderr, e.stderr)
-    else:
-      # subprocess never save the output.
-      self.assertFalse(hasattr(e, 'stdout'))
-      self.assertFalse(hasattr(e, 'stderr'))
 
   def test_check_output_no_stdout(self):
     for subp in (subprocess, subprocess2):

tests/utils_test.py

@@ -7,10 +7,6 @@ import logging
 import os
 import sys
 import unittest
-
-if sys.version_info.major == 2:
-  import mock
-else:
 from unittest import mock
 
 DEPOT_TOOLS_ROOT = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))

tests/watchlists_unittest.py

@@ -10,10 +10,6 @@
 import os
 import sys
 import unittest
-
-if sys.version_info.major == 2:
-  import mock
-else:
 from unittest import mock
 
 sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))

win_toolchain/get_toolchain_if_necessary.py

@@ -31,10 +31,6 @@ import subprocess
 import sys
 import tempfile
 import time
-if sys.version_info[0] < 3:
-  from urllib2 import urlopen, URLError
-  from urlparse import urljoin
-else:
 from urllib.request import urlopen
 from urllib.parse import urljoin
 from urllib.error import URLError
@@ -185,9 +181,6 @@ def CalculateHash(root, expected_hash):
     if expected_hash:
       path_without_hash = path_without_hash.replace(
           os.path.join(root, expected_hash).replace('/', '\\'), root)
-    if sys.version_info[0] < 3:
-      digest.update(path_without_hash.lower())
-    else:
     digest.update(bytes(path_without_hash.lower(), 'utf-8'))
     with open(path, 'rb') as f:
       digest.update(f.read())