Self-updates and program list from the repo

Cli.py

@@ -5,12 +5,16 @@
     SaraSuite update <Name>
     SaraSuite options <Name> [--option Id=on|off ...]   (no --option: list them)
     SaraSuite remove <Name> [--configs] [--keep-runtime]
+    SaraSuite self-update                               (AppImage only)
 
 Install starts from your defaults (Settings, or the manifest's) unless set.
 """
 
 import argparse
 
+import SelfUpdate
+from Catalog import UpdateCatalog
+from Core import AppVersion
 from Installer import Apply, DefaultAnswers, DefaultOptions, FetchCommit, GetStatus, Remove
 from Manifests import LoadPrograms
 
@@ -45,8 +49,19 @@ def Run(Arguments: list[str]) -> int:
     RemoveCommand.add_argument("Name")
     RemoveCommand.add_argument("--configs", action="store_true")
     RemoveCommand.add_argument("--keep-runtime", action="store_true")
+    Commands.add_parser("self-update")
     Args = Parser.parse_args(Arguments)
 
+    if Args.Command == "self-update":
+        Latest = SelfUpdate.LatestRelease()
+        if Latest is None or not SelfUpdate.IsNewer(Latest.Version):
+            print(f"SaraSuite {AppVersion} is the latest.")
+            return 0
+        SelfUpdate.Install(Latest, print)
+        return 0
+
+    UpdateCatalog(print)  # the program list from the SaraSuite repo (AppImage only)
+
     Programs = {Program.Name.lower(): Program for Program in LoadPrograms()}
     if Args.Command == "list":
         for Program in Programs.values():