Make dosep.py PEP8 compliant. NFC.

[chaoren]

Rebase on top of D11910.

[clayborg]

Looks fine.

test/dosep.py

 
 E.g., export LLDB_TESTCONCURRENTEVENTS_TIMEOUT=2m
 
 Set to "0" to run without time limit.
 
 E.g., export LLDB_TEST_TIMEOUT=0
 or    export LLDB_TESTCONCURRENTEVENTS_TIMEOUT=0
 
-To collect core files for timed out tests, do the following before running dosep.py
+To collect core files for timed out tests,
+do the following before running dosep.py
 
 OSX
 ulimit -c unlimited
 sudo sysctl -w kern.corefile=core.%P
 
 Linux:
 ulimit -c unlimited
 echo core.%p | sudo tee /proc/sys/kernel/core_pattern
 """
 
 import multiprocessing
 import os
 import fnmatch
 import platform
 import re
 import dotest_args
 import shlex
 import subprocess
 import sys
 
 from optparse import OptionParser
 
+
 def get_timeout_command():
     """Search for a suitable timeout command."""
     if not sys.platform.startswith("win32"):
         try:
             subprocess.call("timeout", stderr=subprocess.PIPE)
             return "timeout"
         except OSError:
             pass

 
 output_lock = None
 test_counter = None
 total_tests = None
 test_name_len = None
 dotest_options = None
 output_on_success = False
 
+
 def setup_global_variables(lock, counter, total, name_len, options):
     global output_lock, test_counter, total_tests, test_name_len
     global dotest_options
     output_lock = lock
     test_counter = counter
     total_tests = total
     test_name_len = name_len
     dotest_options = options
 
+
 def report_test_failure(name, command, output):
     global output_lock
     with output_lock:
         print >> sys.stderr
         print >> sys.stderr, output
         print >> sys.stderr, "[%s FAILED]" % name
         print >> sys.stderr, "Command invoked: %s" % ' '.join(command)
         update_progress(name)
 
+
 def report_test_pass(name, output):
     global output_lock, output_on_success
     with output_lock:
         if output_on_success:
             print >> sys.stderr
             print >> sys.stderr, output
             print >> sys.stderr, "[%s PASSED]" % name
         update_progress(name)
 
+
 def update_progress(test_name=""):
     global output_lock, test_counter, total_tests, test_name_len
     with output_lock:
         counter_len = len(str(total_tests))
         sys.stderr.write(
             "\r%*d out of %d test suites processed - %-*s" %
             (counter_len, test_counter.value, total_tests,
              test_name_len.value, test_name))
         if len(test_name) > test_name_len.value:
             test_name_len.value = len(test_name)
         test_counter.value += 1
         sys.stdout.flush()
         sys.stderr.flush()
 
+
 def parse_test_results(output):
     passes = 0
     failures = 0
     for result in output:
-        pass_count = re.search("^RESULT:.*([0-9]+) passes", result, re.MULTILINE)
-        fail_count = re.search("^RESULT:.*([0-9]+) failures", result, re.MULTILINE)
-        error_count = re.search("^RESULT:.*([0-9]+) errors", result, re.MULTILINE)
+        pass_count = re.search("^RESULT:.*([0-9]+) passes",
+                               result, re.MULTILINE)
+        fail_count = re.search("^RESULT:.*([0-9]+) failures",
+                               result, re.MULTILINE)
+        error_count = re.search("^RESULT:.*([0-9]+) errors",
+                                result, re.MULTILINE)
         this_fail_count = 0
         this_error_count = 0
-        if pass_count != None:
+        if pass_count is not None:
             passes = passes + int(pass_count.group(1))
-        if fail_count != None:
+        if fail_count is not None:
             failures = failures + int(fail_count.group(1))
-        if error_count != None:
+        if error_count is not None:
             failures = failures + int(error_count.group(1))
         pass
     return passes, failures
 
+
 def call_with_timeout(command, timeout, name):
     """Run command with a timeout if possible."""
     """-s QUIT will create a coredump if they are enabled on your system"""
     process = None
     if timeout_command and timeout != "0":
         command = [timeout_command, '-s', 'QUIT', timeout] + command
-    # Specifying a value for close_fds is unsupported on Windows when using subprocess.PIPE
+    # Specifying a value for close_fds is unsupported on Windows when using
+    # subprocess.PIPE
     if os.name != "nt":
-        process = subprocess.Popen(command, stdin=subprocess.PIPE,
-                                            stdout=subprocess.PIPE,
-                                            stderr=subprocess.PIPE,
-                                            close_fds=True)
+        process = subprocess.Popen(command,
+                                   stdin=subprocess.PIPE,
     else:
-        process = subprocess.Popen(command, stdin=subprocess.PIPE,
-                                            stdout=subprocess.PIPE,
-                                            stderr=subprocess.PIPE)
+        process = subprocess.Popen(command,
+                                   stdin=subprocess.PIPE,
     output = process.communicate()
     exit_status = process.returncode
     passes, failures = parse_test_results(output)
     if exit_status == 0:
-        # stdout does not have any useful information from 'dotest.py', only stderr does.
+        # stdout does not have any useful information from 'dotest.py',
+        # only stderr does.
         report_test_pass(name, output[1])
     else:
         report_test_failure(name, command, output[1])
     return name, exit_status, passes, failures
 
+
 def process_dir(root, files, test_root, dotest_argv):
     """Examine a directory for tests, and invoke any found within it."""
     results = []
     for name in files:
         script_file = os.path.join(test_root, "dotest.py")
         command = ([sys.executable, script_file] +
                    dotest_argv +
                    ["-p", name, root])
 
         timeout_name = os.path.basename(os.path.splitext(name)[0]).upper()
 
-        timeout = os.getenv("LLDB_%s_TIMEOUT" % timeout_name) or getDefaultTimeout(dotest_options.lldb_platform_name)
+        timeout = (os.getenv("LLDB_%s_TIMEOUT" % timeout_name) or
+                   getDefaultTimeout(dotest_options.lldb_platform_name))
 
         results.append(call_with_timeout(command, timeout, name))
 
     # result = (name, status, passes, failures)
     timed_out = [name for name, status, _, _ in results
                  if status == eTimedOut]
     passed = [name for name, status, _, _ in results
               if status == ePassed]
     failed = [name for name, _, _, _ in results
               if name not in timed_out + passed]
     pass_count = sum([result[2] for result in results])
     fail_count = sum([result[3] for result in results])
 
     return (timed_out, passed, failed, pass_count, fail_count)
 
 in_q = None
 out_q = None
 
+
 def process_dir_worker(arg_tuple):
     """Worker thread main loop when in multithreaded mode.
     Takes one directory specification at a time and works on it."""
     return process_dir(*arg_tuple)
 
+
 def walk_and_invoke(test_directory, test_subdir, dotest_argv, num_threads):
     """Look for matched files and invoke test driver on each one.
     In single-threaded mode, each test driver is invoked directly.
     In multi-threaded mode, submit each test driver to a worker
     queue, and then wait for all to complete.
 
     test_directory - lldb/test/ directory
-    test_subdir - lldb/test/ or a subfolder with the tests we're interested in running
+    test_subdir - lldb/test/ or a subfolder with the tests we're interested in
+                  running
     """
 
     # Collect the test files that we'll run.
     test_work_items = []
     for root, dirs, files in os.walk(test_subdir, topdown=False):
         def is_test(name):
             # Not interested in symbolically linked files.
             if os.path.islink(os.path.join(root, name)):
def walk_and_invoke(test_directory, test_subdir, dotest_argv, num_threads):
     timed_out = sum([result[0] for result in test_results], [])
     passed = sum([result[1] for result in test_results], [])
     failed = sum([result[2] for result in test_results], [])
     pass_count = sum([result[3] for result in test_results])
     fail_count = sum([result[4] for result in test_results])
 
     return (timed_out, passed, failed, pass_count, fail_count)
 
+
 def getExpectedTimeouts(platform_name):
     # returns a set of test filenames that might timeout
     # are we running against a remote target?
     if platform_name is None:
         target = sys.platform
         remote = False
     else:
         m = re.search('remote-(\w+)', platform_name)
         target = m.group(1)
         remote = True
 
     expected_timeout = set()
 
     if target.startswith("linux"):
         expected_timeout |= {
             "TestAttachDenied.py",
             "TestAttachResume.py",
             "TestProcessAttach.py",
             "TestConnectRemote.py",
             "TestCreateAfterAttach.py",
             "TestEvents.py",
             "TestExitDuringStep.py",
-            "TestHelloWorld.py", # Times out in ~10% of the times on the build bot
+
+            # Times out in ~10% of the times on the build bot
+            "TestHelloWorld.py",
             "TestMultithreaded.py",
-            "TestRegisters.py", # ~12/600 dosep runs (build 3120-3122)
+            "TestRegisters.py",  # ~12/600 dosep runs (build 3120-3122)
             "TestThreadStepOut.py",
         }
     elif target.startswith("android"):
         expected_timeout |= {
             "TestExitDuringStep.py",
             "TestHelloWorld.py",
         }
     elif target.startswith("freebsd"):
         expected_timeout |= {
             "TestBreakpointConditions.py",
             "TestChangeProcessGroup.py",
             "TestValueObjectRecursion.py",
             "TestWatchpointConditionAPI.py",
         }
     elif target.startswith("darwin"):
         expected_timeout |= {
-            "TestThreadSpecificBreakpoint.py", # times out on MBP Retina, Mid 2012
+            # times out on MBP Retina, Mid 2012
+            "TestThreadSpecificBreakpoint.py",
         }
     return expected_timeout
 
+
 def getDefaultTimeout(platform_name):
     if os.getenv("LLDB_TEST_TIMEOUT"):
         return os.getenv("LLDB_TEST_TIMEOUT")
 
     if platform_name is None:
         platform_name = sys.platform
 
     if platform_name.startswith("remote-"):
         return "10m"
     else:
         return "4m"
 
 
 def touch(fname, times=None):
     with open(fname, 'a'):
         os.utime(fname, times)
 
+
 def find(pattern, path):
     result = []
     for root, dirs, files in os.walk(path):
         for name in files:
             if fnmatch.fnmatch(name, pattern):
                 result.append(os.path.join(root, name))
     return result
 
+
 def main():
     # We can't use sys.path[0] to determine the script directory
     # because it doesn't work under a debugger
     test_directory = os.path.dirname(os.path.realpath(__file__))
     parser = OptionParser(usage="""\
 Run lldb test suite using a separate process for each test file.
 
        Each test will run with a time limit of 10 minutes by default.
 
        Override the default time limit of 10 minutes by setting
        the environment variable LLDB_TEST_TIMEOUT.
 
        E.g., export LLDB_TEST_TIMEOUT=10m
 
        Override the time limit for individual tests by setting
        the environment variable LLDB_[TEST NAME]_TIMEOUT.
 
        E.g., export LLDB_TESTCONCURRENTEVENTS_TIMEOUT=2m
 
        Set to "0" to run without time limit.
 
        E.g., export LLDB_TEST_TIMEOUT=0
        or    export LLDB_TESTCONCURRENTEVENTS_TIMEOUT=0
 """)
-    parser.add_option('-o', '--options',
-                      type='string', action='store',
-                      dest='dotest_options',
-                      help="""The options passed to 'dotest.py' if specified.""")
+    parser.add_option(
+        '-o', '--options',
 
-    parser.add_option('-s', '--output-on-success',
-                      action='store_true',
-                      dest='output_on_success',
-                      default=False,
-                      help="""Print full output of 'dotest.py' even when it succeeds.""")
+    parser.add_option(
+        '-s', '--output-on-success',
 
-    parser.add_option('-t', '--threads',
-                      type='int',
-                      dest='num_threads',
-                      help="""The number of threads to use when running tests separately.""")
+    parser.add_option(
+        '-t', '--threads',
 
     opts, args = parser.parse_args()
     dotest_option_string = opts.dotest_options
 
     is_posix = (os.name == "posix")
-    dotest_argv = shlex.split(dotest_option_string, posix=is_posix) if dotest_option_string else []
+    dotest_argv = (shlex.split(dotest_option_string, posix=is_posix)
+                   if dotest_option_string
+                   else [])
 
     parser = dotest_args.create_parser()
     global dotest_options
     global output_on_success
     output_on_success = opts.output_on_success
     dotest_options = dotest_args.parse_args(parser, dotest_argv)
 
     if not dotest_options.s:
         # no session log directory, we need to add this to prevent
         # every dotest invocation from creating its own directory
         import datetime
         # The windows platforms don't like ':' in the pathname.
-        timestamp_started = datetime.datetime.now().strftime("%Y-%m-%d-%H_%M_%S")
+        timestamp_started = datetime.datetime.now().strftime("%F-%H_%M_%S")
         dotest_argv.append('-s')
         dotest_argv.append(timestamp_started)
         dotest_options.s = timestamp_started
 
     session_dir = os.path.join(os.getcwd(), dotest_options.s)
 
     # The root directory was specified on the command line
     if len(args) == 0: