cli: allow to run even if config file is missing

grid5000/cli.py

@@ -20,23 +20,29 @@ MOTD = r"""
 \____/_/  /_/\__,_/  /_____/\____/\____/\____/
 
 
-* Configuration loaded from %s
-* A new client (variable gk) has been created for the user %s
+"""
+
+MOTD_END = """\
 * Start exploring the API through the gk variable
   # Example: Get all available sites
   $) gk.sites.list()
 
 """
 
-
 def main():
-
     path = pathlib.Path(CONF_PATH)
-    if not path.exists():
-        print("Configuration file %s is missing" % CONF_PATH)
-        return
-    gk = Grid5000.from_yaml(CONF_PATH)
-    motd = MOTD % (CONF_PATH, gk.username)
+    motd = MOTD
+    if path.exists():
+        gk = Grid5000.from_yaml(CONF_PATH)
+        motd += "* Configuration loaded from %s\n" % CONF_PATH
+    else:
+        gk = Grid5000()
+        motd += "* Warning: configuration file %s is missing, authentication might not work\n" % CONF_PATH
+    if gk.username:
+        motd += "* A new client (variable gk) has been created for the user %s\n" % gk.username
+    else:
+        motd += "* A new client (variable gk) has been created\n"
+    motd += MOTD_END
     IPython.embed(header=motd)