Support passing just a single project name

This allows you to pass just the project name, like 'nova',
to the --project option so you don't have to actually know
the underlying file structure.

Change-Id: I9f0f7f54ff5f5c1d99f391fc0706c00ccbe8886f

reviewstats/tests/test_projectinfo.py

@@ -18,3 +18,11 @@ class TestProjectInfo(base.TestCase):
 
     def test_project_definitions_load(self):
         utils.get_projects_info('', True)
+
+    def test_get_projects_info_single_name(self):
+        projects = utils.get_projects_info('nova')
+        self.assertEqual(1, len(projects))
+
+    def test_get_projects_info_single_name_projects_prefixed(self):
+        projects = utils.get_projects_info('projects/stable.json')
+        self.assertEqual(1, len(projects))

reviewstats/utils.py

@@ -31,7 +31,8 @@ import paramiko
 LOG = logging.getLogger(__name__)
 
 
-def get_projects_info(project=None, all_projects=False, base_dir='./projects'):
+def get_projects_info(project=None, all_projects=False,
+                      base_dir='./projects/'):
     """Return the list of project dict objects.
 
     :param project: pathname of the JSON project info file.
@@ -57,6 +58,12 @@ def get_projects_info(project=None, all_projects=False, base_dir='./projects'):
     if all_projects:
         files = glob.glob('%s/*.json' % base_dir)
     else:
+        # handle just passing the project name
+        if not os.path.isfile(project):
+            if not project.startswith(base_dir):
+                project = base_dir + project
+            if not project.endswith('.json'):
+                project = project + '.json'
         files = [project]
 
     projects = []