[scm-wrapper] Report when file wrapper did not match anything

Signed-off-by: Lubomír Sedlář <lsedlar@redhat.com>

pungi/wrappers/scm.py

@@ -76,6 +76,8 @@ class FileWrapper(ScmBase):
         if scm_root:
             raise ValueError("FileWrapper: 'scm_root' should be empty.")
         dirs = glob.glob(scm_dir)
+        if not dirs:
+            raise RuntimeError('No directories matched, can not export.')
         for i in dirs:
             _copy_all(i, target_dir)
 
@@ -83,6 +85,8 @@ class FileWrapper(ScmBase):
         if scm_root:
             raise ValueError("FileWrapper: 'scm_root' should be empty.")
         files = glob.glob(scm_file)
+        if not files:
+            raise RuntimeError('No files matched, can not export.')
         for i in files:
             target_path = os.path.join(target_dir, os.path.basename(i))
             shutil.copy2(i, target_path)

tests/test_scm.py

@@ -69,6 +69,24 @@ class FileSCMTestCase(unittest.TestCase):
         self.assertTrue(os.path.isfile(os.path.join(self.destdir, 'first')))
         self.assertTrue(os.path.isfile(os.path.join(self.destdir, 'second')))
 
+    def test_get_missing_file(self):
+        with self.assertRaises(RuntimeError) as ctx:
+            scm.get_file_from_scm({'scm': 'file',
+                                   'repo': None,
+                                   'file': 'this-is-really-not-here.txt'},
+                                  self.destdir)
+
+        self.assertIn('No files matched', str(ctx.exception))
+
+    def test_get_missing_dir(self):
+        with self.assertRaises(RuntimeError) as ctx:
+            scm.get_dir_from_scm({'scm': 'file',
+                                  'repo': None,
+                                  'dir': 'this-is-really-not-here'},
+                                 self.destdir)
+
+        self.assertIn('No directories matched', str(ctx.exception))
+
 
 class GitSCMTestCase(unittest.TestCase):
     def setUp(self):