Refactor code to comply with flake8 and isort

Signed-off-by: Filipe Laíns <lains@archlinux.org>
Signed-off-by: Lukas Fleischer <lfleischer@archlinux.org>

aurweb/git/auth.py

@@ -1,8 +1,7 @@
 #!/usr/bin/env python3
 
-import os
-import shlex
 import re
+import shlex
 import sys
 
 import aurweb.config

aurweb/git/serve.py

@@ -175,11 +175,11 @@ def pkgbase_set_comaintainers(pkgbase, userlist, user, privileged):
         i += 1
 
     for userid in uids_rem:
-            cur = conn.execute("DELETE FROM PackageComaintainers " +
-                               "WHERE PackageBaseID = ? AND UsersID = ?",
-                               [pkgbase_id, userid])
-            subprocess.Popen((notify_cmd, 'comaintainer-remove',
-                              str(userid), str(pkgbase_id)))
+        cur = conn.execute("DELETE FROM PackageComaintainers " +
+                           "WHERE PackageBaseID = ? AND UsersID = ?",
+                           [pkgbase_id, userid])
+        subprocess.Popen((notify_cmd, 'comaintainer-remove',
+                         str(userid), str(pkgbase_id)))
 
     conn.commit()
     conn.close()
@@ -268,7 +268,7 @@ def pkgbase_disown(pkgbase, user, privileged):
     cur = conn.execute("SELECT ID FROM Users WHERE Username = ?", [user])
     userid = cur.fetchone()[0]
     if userid == 0:
-            raise aurweb.exceptions.InvalidUserException(user)
+        raise aurweb.exceptions.InvalidUserException(user)
 
     subprocess.Popen((notify_cmd, 'disown', str(userid), str(pkgbase_id)))
 
@@ -472,7 +472,7 @@ def checkarg(cmdargv, *argdesc):
     checkarg_atmost(cmdargv, *argdesc)
 
 
-def serve(action, cmdargv, user, privileged, remote_addr):
+def serve(action, cmdargv, user, privileged, remote_addr):  # noqa: C901
     if enable_maintenance:
         if remote_addr not in maintenance_exc:
             raise aurweb.exceptions.MaintenanceException

aurweb/git/update.py

@@ -1,12 +1,12 @@
 #!/usr/bin/env python3
 
 import os
-import pygit2
 import re
 import subprocess
 import sys
 import time
 
+import pygit2
 import srcinfo.parse
 import srcinfo.utils
 
@@ -75,7 +75,7 @@ def create_pkgbase(conn, pkgbase, user):
     return pkgbase_id
 
 
-def save_metadata(metadata, conn, user):
+def save_metadata(metadata, conn, user):  # noqa: C901
     # Obtain package base ID and previous maintainer.
     pkgbase = metadata['pkgbase']
     cur = conn.execute("SELECT ID, MaintainerUID FROM PackageBases "
@@ -232,7 +232,7 @@ def die_commit(msg, commit):
     exit(1)
 
 
-def main():
+def main():  # noqa: C901
     repo = pygit2.Repository(repo_path)
 
     user = os.environ.get("AUR_USER")