[ux] rename 'yunohost domain maindomain' to 'yunohost domain main-domain'

data/actionsmap/yunohost.yml

@@ -442,8 +442,10 @@ domain:
                             - "pattern_positive_number"
 
         ### domain_maindomain()
-        maindomain:
+        main-domain:
             action_help: Check the current main domain, or change it
+            deprecated_alias:
+                - maindomain
             api:
                 - GET /domains/main
                 - PUT /domains/main

src/yunohost/domain.py

@@ -236,7 +236,7 @@ def domain_dns_conf(domain, ttl=None):
 
 
 @is_unit_operation()
-def domain_maindomain(operation_logger, new_main_domain=None):
+def domain_main_domain(operation_logger, new_main_domain=None):
     """
     Check the current main domain, or change it
 

src/yunohost/tools.py

@@ -166,7 +166,8 @@ def tools_adminpw(new_password, check_strength=True):
 
 @is_unit_operation()
 def tools_maindomain(operation_logger, new_main_domain=None):
-    from yunohost.domain import domain_maindomain
+    from yunohost.domain import domain_main_domain
+    logger.warning(m18n.g("deprecated_command_alias", prog="yunohost", old="tools maindomain", new="domain main-domain"))
     return domain_main_domain(new_main_domain=new_main_domain)