repo: Cleaned up pylint/pep8 violations

I noticed when running pylint (as the SUBMITTING_PATCHES file directs)
that there were a number of violations reported. This makes it difficult
to see violations I might have introduced. This commit corrects all
pylint violations in the repo script.

First I ran this to clean up the formatting:

 autopep8 --max-line-length=80 --indent-size 2 repo

Following that the following violations remained:

% pylint --rcfile=.pylintrc repo
************* Module repo
W:220,21: Redefining name 'init_optparse' from outer scope (line 156)
(redefined-outer-name)
W:482, 2: No exception type(s) specified (bare-except)
C:704, 0: Old-style class defined. (old-style-class)

For line 220, the parameter to _GitcInitOptions was renamed so as not to
mask the init_optparse global.

For line 482, a pylint directive was added to disable the bare-execpt
violation for just that line.

For line 704, the _Options class was changed to subclass object.

Additionally, the comments at lines 107-113 were spaced out to line up
with the comment at line 112 that autopep8 moved.

This script now has a pylint score of 10.0

Change-Id: I779b66eb6b061a195d3c4372b99dec1b6d2a214f

repo

@@ -1,7 +1,7 @@
 #!/usr/bin/env python
 
-## repo default configuration
-##
+# repo default configuration
+#
 import os
 REPO_URL = os.environ.get('REPO_URL', None)
 if not REPO_URL:
@@ -216,9 +216,10 @@ group.add_option('--config-name',
                  dest='config_name', action="store_true", default=False,
                  help='Always prompt for name/e-mail')
 
-def _GitcInitOptions(init_optparse):
-  init_optparse.set_usage("repo gitc-init -u url -c client [options]")
-  g = init_optparse.add_option_group('GITC options')
+
+def _GitcInitOptions(init_optparse_arg):
+  init_optparse_arg.set_usage("repo gitc-init -u url -c client [options]")
+  g = init_optparse_arg.add_option_group('GITC options')
   g.add_option('-f', '--manifest-file',
                dest='manifest_file',
                help='Optional manifest file to use for this GITC client.')
@@ -227,6 +228,8 @@ def _GitcInitOptions(init_optparse):
                help='The name of the gitc_client instance to create or modify.')
 
 _gitc_manifest_dir = None
+
+
 def get_gitc_manifest_dir():
   global _gitc_manifest_dir
   if _gitc_manifest_dir is None:
@@ -241,6 +244,7 @@ def get_gitc_manifest_dir():
       pass
   return _gitc_manifest_dir
 
+
 def gitc_parse_clientdir(gitc_fs_path):
   """Parse a path in the GITC FS and return its client name.
 
@@ -263,7 +267,9 @@ def gitc_parse_clientdir(gitc_fs_path):
     return gitc_fs_path.split(manifest_dir)[1].split('/')[0]
   return gitc_fs_path.split(GITC_FS_ROOT_DIR)[1].split('/')[0]
 
+
 class CloneFailure(Exception):
+
   """Indicate the remote clone of repo itself failed.
   """
 
@@ -473,7 +479,7 @@ def _InitHttp():
       p = n.hosts[host]
       mgr.add_password(p[1], 'http://%s/' % host, p[0], p[2])
       mgr.add_password(p[1], 'https://%s/' % host, p[0], p[2])
-  except:
+  except:  # pylint: disable=bare-except
     pass
   handlers.append(urllib.request.HTTPBasicAuthHandler(mgr))
   handlers.append(urllib.request.HTTPDigestAuthHandler(mgr))
@@ -486,6 +492,7 @@ def _InitHttp():
     handlers.append(urllib.request.HTTPSHandler(debuglevel=1))
   urllib.request.install_opener(urllib.request.build_opener(*handlers))
 
+
 def _Fetch(url, local, src, quiet):
   if not quiet:
     _print('Get %s' % url, file=sys.stderr)
@@ -507,6 +514,7 @@ def _Fetch(url, local, src, quiet):
   if proc.wait() != 0:
     raise CloneFailure()
 
+
 def _DownloadBundle(url, local, quiet):
   if not url.endswith('/'):
     url += '/'
@@ -557,6 +565,7 @@ def _DownloadBundle(url, local, quiet):
   finally:
     dest.close()
 
+
 def _ImportBundle(local):
   path = os.path.join(local, '.git', 'clone.bundle')
   try:
@@ -564,6 +573,7 @@ def _ImportBundle(local):
   finally:
     os.remove(path)
 
+
 def _Clone(url, local, quiet):
   """Clones a git repository to a new subdirectory of repodir
   """
@@ -591,7 +601,8 @@ def _Clone(url, local, quiet):
 
   _InitHttp()
   _SetConfig(local, 'remote.origin.url', url)
-  _SetConfig(local, 'remote.origin.fetch',
+  _SetConfig(local,
+             'remote.origin.fetch',
              '+refs/heads/*:refs/remotes/origin/*')
   if _DownloadBundle(url, local, quiet):
     _ImportBundle(local)
@@ -690,7 +701,7 @@ def _FindRepo():
   return (repo, os.path.join(curdir, repodir))
 
 
-class _Options:
+class _Options(object):
   help = False
 
 
@@ -814,7 +825,8 @@ def main(orig_args):
   if get_gitc_manifest_dir() and cwd.startswith(get_gitc_manifest_dir()):
     _print('error: repo cannot be used in the GITC local manifest directory.'
            '\nIf you want to work on this GITC client please rerun this '
-           'command from the corresponding client under /gitc/', file=sys.stderr)
+           'command from the corresponding client under /gitc/',
+           file=sys.stderr)
     sys.exit(1)
   if not repo_main:
     if opt.help: