cleanup: fixes of checking for None

Don't update repoinfo for all repos if an invalid repo is specified.

kallithea/lib/paster_commands/update_repoinfo.py

@@ -63,7 +63,7 b' class Command(BasePasterCommand):'
                                self.options.repo_update_list.split(',')) \
                                if self.options.repo_update_list else None
 
-        if repo_update_list:
+        if repo_update_list is not None:
             repo_list = list(Repository.query()\
                 .filter(Repository.repo_name.in_(repo_update_list)))
         else:

kallithea/lib/vcs/backends/git/changeset.py

@@ -287,7 +287,7 b' class GitChangeset(BaseChangeset):'
         cs_id = safe_str(self.id)
         f_path = safe_str(path)
 
-        if limit:
+        if limit is not None:
             cmd = ['log', '-n', str(safe_int(limit, 0)),
                    '--pretty=format:%H', '-s', cs_id, '--', f_path]
 

kallithea/lib/vcs/backends/hg/changeset.py

@@ -256,7 +256,7 b' class MercurialChangeset(BaseChangeset):'
         for cs in reversed([x for x in fctx.filelog()]):
             cnt += 1
             hist.append(hex(fctx.filectx(cs).node()))
-            if limit and cnt == limit:
+            if limit is not None and cnt == limit:
                 break
 
         return [self.repository.get_changeset(node) for node in hist]

kallithea/model/repo.py

@@ -175,7 +175,7 b' class RepoModel(BaseModel):'
 
     @classmethod
     def update_repoinfo(cls, repositories=None):
-        if not repositories:
+        if repositories is None:
             repositories = Repository.getAll()
         for repo in repositories:
             repo.update_changeset_cache()