assemble: Ignore exception yielded by fetched apps checking

If there is an error or exception occurs during checking whether
apps were fetched before then ignore it and let the assemble do its own
app fetching.

Signed-off-by: Mike Sul <[email protected]>

assemble.py

@@ -276,21 +276,24 @@ def fetch_restorable_apps(target: FactoryClient.Target, dst_dir: str, shortlist:
 def check_and_get_fetched_apps_uri(target: FactoryClient.Target, shortlist: [str] = None):
     fetched_apps = None
     fetched_apps_uri = None
-    if "fetched-apps" in target.json.get("custom", {}):
-        fetched_apps_str = target.json["custom"]["fetched-apps"].get("shortlist")
-        if fetched_apps_str:
-            fetched_apps = set(
-                x.strip() for x in fetched_apps_str.split(',') if x)
-        else:
-            # if `shortlist` is not defined or empty then all target apps were fetched
-            fetched_apps = set(app[0] for app in target.apps())
-
-        apps_to_fetch = set(shortlist) if shortlist else set(app[0] for app in target.apps())
-
-        if fetched_apps.issubset(apps_to_fetch):
-            # if the previously fetched apps is a sub-set of the apps to be fetched then
-            # enable getting and reusing the previously fetched apps
-            fetched_apps_uri = target.json["custom"]["fetched-apps"]["uri"]
+    try:
+        if "fetched-apps" in target.json.get("custom", {}):
+            fetched_apps_str = target.json["custom"]["fetched-apps"].get("shortlist")
+            if fetched_apps_str:
+                fetched_apps = set(
+                    x.strip() for x in fetched_apps_str.split(',') if x)
+            else:
+                # if `shortlist` is not defined or empty then all target apps were fetched
+                fetched_apps = set(app[0] for app in target.apps())
+
+            apps_to_fetch = set(shortlist) if shortlist else set(app[0] for app in target.apps())
+
+            if fetched_apps.issubset(apps_to_fetch):
+                # if the previously fetched apps is a sub-set of the apps to be fetched then
+                # enable getting and reusing the previously fetched apps
+                fetched_apps_uri = target.json["custom"]["fetched-apps"]["uri"]
+    except Exception as err:
+        logger.error(f"Failed to get info about fetched apps: {err}")
 
     return fetched_apps_uri, fetched_apps