metadata: remove non-values from Builds: entries

fdroidserver/metadata.py

@@ -1077,8 +1077,14 @@ def _format_multiline(value):
     return str(value)
 
 
+def _format_list(value):
+    """TYPE_LIST should not contain null values."""
+    return [v for v in value if v]
+
+
 def _format_script(value):
     """TYPE_SCRIPT with one value are converted to YAML string values."""
+    value = [v for v in value if v]
     if len(value) == 1:
         return value[0]
     return value
@@ -1175,6 +1181,8 @@ def _builds_to_yaml(app):
             _flagtype = flagtype(field)
             if _flagtype == TYPE_MULTILINE:
                 v = _format_multiline(v)
+            elif _flagtype == TYPE_LIST:
+                v = _format_list(v)
             elif _flagtype == TYPE_SCRIPT:
                 v = _format_script(v)
             elif _flagtype == TYPE_STRINGMAP:

tests/metadata.TestCase

@@ -1943,6 +1943,24 @@ class MetadataTest(unittest.TestCase):
             '\none\ntwo\nthree\n',
         )
 
+    def test_format_list_empty(self):
+        self.assertEqual(metadata._format_list(['', None]), list())
+
+    def test_format_list_one_empty(self):
+        self.assertEqual(metadata._format_list(['foo', None]), ['foo'])
+
+    def test_format_list_two(self):
+        self.assertEqual(metadata._format_list(['2', '1']), ['2', '1'])
+
+    def test_format_list_newline(self):
+        self.assertEqual(metadata._format_list(['one\ntwo']), ['one\ntwo'])
+
+    def test_format_list_newline_char(self):
+        self.assertEqual(metadata._format_list(['one\\ntwo']), ['one\\ntwo'])
+
+    def test_format_script_empty(self):
+        self.assertEqual(metadata._format_script(['', None]), list())
+
     def test_format_script_newline(self):
         self.assertEqual(metadata._format_script(['one\ntwo']), 'one\ntwo')
 
@@ -2086,6 +2104,18 @@ class MetadataTest(unittest.TestCase):
             metadata._builds_to_yaml(app), [{'versionCode': 0, 'gradle': ['false']}]
         )
 
+    def test_builds_to_yaml_stripped(self):
+        self.assertEqual(
+            metadata._builds_to_yaml(
+                {
+                    'Builds': [
+                        metadata.Build({'versionCode': 0, 'rm': [None], 'init': ['']})
+                    ]
+                }
+            ),
+            [{'versionCode': 0}],
+        )
+
     def test_builds_to_yaml(self):
         """Include one of each flag type with a valid value."""
         app = {