repos: strip dot from layer name

when importing nested layer in combination with the top level layer like

meta-security
meta-security/meta-tpm

one can use

layers:
    .:
    meta-tpm:

in the spec file to import the parent layer.
This leads to the effect that

.
meta-tpm             = "HEAD:<hash>"

is shown in the build console and in /etc/build
when using image-buildinfo.bbclass.
To fix that just strip the trailing dot from each layer name.

Add test to avoid future regressions

Signed-off-by: Konrad Weihmann <kweihmann@outlook.com>
[Jan: use only a single rstrip call, fix style]
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>

kas/repos.py

@@ -52,7 +52,7 @@ class Repo:
 
     def __getattr__(self, item):
         if item == 'layers':
-            return [os.path.join(self.path, layer).rstrip(os.sep)
+            return [os.path.join(self.path, layer).rstrip(os.sep + '.')
                     for layer in self._layers]
         elif item == 'qualified_name':
             url = urlparse(self.url)

tests/test_layers.py

@@ -60,3 +60,10 @@ def test_layers_exclude(dokas):
     with open('build/conf/bblayers.conf', 'r') as f:
         for line in f:
             assert('test_layers/kas2' not in line)
+
+
+def test_layers_strip_dot(dokas):
+    with open('build/conf/bblayers.conf', 'r') as f:
+        lines = f.readlines()
+        assert(any('test_layers/kas3 ' in x for x in lines))
+        assert(any('test_layers/kas3/meta-bar' in x for x in lines))

tests/test_layers/test.yml

@@ -20,3 +20,10 @@ repos:
     refspec: master
     layers:
       .: excluded
+
+  kas3:
+    url: https://github.com/siemens/kas.git
+    refspec: master
+    layers:
+      .:
+      meta-bar: