maven: Discard templated origin URLs

swh/lister/maven/lister.py

@@ -303,6 +303,13 @@ class MavenLister(Lister[MavenListerState, RepoPage]):
         if not url:
             return None
 
+        if "${" in url:
+            # A handful of URLs contain templated strings (21, as of 2023-01-30)
+            # We could implement support for
+            # https://maven.apache.org/guides/introduction/introduction-to-the-pom.html#Project_Interpolation_and_Variables
+            # but most of them seem to use variables not defined in this spec.
+            return None
+
         assert visit_type is not None
         assert self.lister_obj.id is not None
         return ListedOrigin(