Improve error messages to make misconfigurations easier to understand (…

…#500)

Make misconfigurations easier to understand for:
- multi kustomization with naming conflict 
- failing to find HelmRepository

#492

flux_local/git_repo.py

@@ -439,8 +439,12 @@ async def visit_kustomization(
     )
     unique = {ks.namespaced_name for ks in kustomizations}
     if len(unique) != len(kustomizations):
+        ks_names = [ks.namespaced_name for ks in kustomizations]
+        dupes = list(filter(lambda x: ks_names.count(x) > 1, ks_names))
         raise FluxException(
-            "Detected multiple Fluxtomizations with the same name indicating a multi-cluster setup. Please run with a more strict path"
+            f"Detected multiple Fluxtomizations with the same name: {dupes}. "
+            "This indicates either (1) an incorrect Kustomization which needs to be fixed "
+            "or (2) a multi-cluster setup which requires flux-local to run with a more strict --path."
         )
     return kustomizations
 

flux_local/helm.py

@@ -211,7 +211,8 @@ async def template(
         if not repo:
             raise HelmException(
                 f"Unable to find HelmRepository for {release.chart.chart_name} for "
-                f"HelmRelease {release.name}"
+                f"HelmRelease {release.name} "
+                f"({len(self._repos)} other HelmRepositories in --path)"
             )
         args: list[str] = [
             HELM_BIN,