From 18c2cf9263afd4f3f9ef2f11c60012470c7058af Mon Sep 17 00:00:00 2001
From: Yaakov Selkowitz <yselkowi@redhat.com>
Date: Jun 10 2024 17:42:10 +0000
Subject: Provide error message on depchase failure


This assertion was triggered after F39 final freeze lifted, and one of
the many updates included the splitting out of a -libs subpackage from a
runtime dependency.  At least in that case, the solution is to update
the runtime, but without a message it is difficult to debug.

---

diff --git a/flatpak_module_tools/depchase/cli.py b/flatpak_module_tools/depchase/cli.py
index 2c8e065..4d4170a 100644
--- a/flatpak_module_tools/depchase/cli.py
+++ b/flatpak_module_tools/depchase/cli.py
@@ -205,7 +205,10 @@ def collate_packages(
     for package in packages.values():
         if not requested_packages or package.name not in requested_packages:
             package.explanation = get_explanation(package.name)
-            assert package.explanation is not None
+            if not package.explanation:
+                raise RuntimeError(
+                    f"{package.name} dependency cannot be resolved, may be missing from runtime"
+                )
             package.explanation.append(package.name)
 
     return packages