handle linting a project in pwd

When calling "django-migration-linter ."
be able to handle it (especially with cache)

django_migration_linter/cache.py

@@ -22,7 +22,7 @@
 class Cache(dict):
     def __init__(self, django_folder, cache_path):
         self.django_folder = django_folder
-        project_name = split_path(django_folder)[-2]
+        project_name = split_path(django_folder)[-1]
         self.filename = os.path.join(cache_path, "{0}.pickle".format(project_name))
 
         if not os.path.exists(os.path.dirname(self.filename)):

django_migration_linter/migration_linter.py

@@ -45,7 +45,7 @@ def __init__(self, project_path, **kwargs):
             )
 
         # Store parameters and options
-        self.django_path = project_path
+        self.django_path = os.path.abspath(project_path)
         self.ignore_name_contains = kwargs.get("ignore_name_contains", None)
         self.ignore_name = kwargs.get("ignore_name", None) or tuple()
         self.include_apps = kwargs.get("include_apps", None)

django_migration_linter/utils.py

@@ -49,7 +49,7 @@ def find_project_settings_module(path):
 
 def split_path(path):
     a, b = os.path.split(path)
-    return (split_path(a) if (len(a) > 0 and a != "/") else []) + [b]
+    return (split_path(a) if (len(a) > 0 and a != "/") else []) + ([b] if b else [])
 
 
 def split_migration_path(migration_path):

tests/functional/test_cmd_line_call.py

@@ -220,3 +220,24 @@ def test_call_linter_with_deleted_migrations(self):
         self.assertEqual(len(lines), 3)
         self.assertTrue(lines[0].endswith('OK'))
         self.assertTrue(lines[1].startswith('*** Summary'))
+
+    def test_call_from_within_project(self):
+        cmd = 'cd {0} && {1} --no-cache .'.format(
+            fixtures.CORRECT_PROJECT,
+            self.linter_exec)
+
+        process = Popen(
+            cmd, shell=True, stdout=PIPE, stderr=PIPE)
+        process.wait()
+        self.assertEqual(process.returncode, 0)
+        lines = list(map(utils.clean_bytes_to_str, process.stdout.readlines()))
+        self.assertEqual(len(lines), 6)
+        self.assertEqual(
+            sorted(lines[:4]),
+            sorted([
+                 "(test_app1, 0001_initial)... OK",
+                 "(test_app1, 0002_a_new_null_field)... OK",
+                 "(test_app2, 0001_foo)... OK",
+                 "(test_app3, 0001_initial)... OK",
+             ])
+        )

tests/unit/test_utils.py

@@ -58,6 +58,12 @@ def test_split_full_path(self):
         self.assertEqual(splitted[1], 'bar')
         self.assertEqual(splitted[2], 'fuz.py')
 
+    def test_split_folder_path(self):
+        splitted = split_path('/foo/bar')
+        self.assertEqual(len(splitted), 2)
+        self.assertEqual(splitted[0], 'foo')
+        self.assertEqual(splitted[1], 'bar')
+
     def test_split_migration_long_path(self):
         input_path = 'apps/the_app/migrations/0001_stuff.py'
         app, mig = split_migration_path(input_path)