[enh] Set main domain as hostname (#219)

locales/en.json

@@ -81,6 +81,7 @@
     "domain_dyndns_invalid": "Invalid domain to use with DynDNS",
     "domain_dyndns_root_unknown": "Unknown DynDNS root domain",
     "domain_exists": "Domain already exists",
+    "domain_hostname_failed": "Failed to set new hostname",
     "domain_uninstall_app_first": "One or more apps are installed on this domain. Please uninstall them before proceeding to domain removal",
     "domain_unknown": "Unknown domain",
     "domain_zone_exists": "DNS zone file already exists",

src/yunohost/tools.py

@@ -163,6 +163,28 @@ def tools_maindomain(auth, new_domain=None):
         logger.warning("%s" % e, exc_info=1)
         raise MoulinetteError(errno.EPERM, m18n.n('maindomain_change_failed'))
 
+    # Set hostname
+    pretty_hostname = "(YunoHost/%s)" % new_domain
+    commands = [
+        "sudo hostnamectl --static    set-hostname".split() + [new_domain],
+        "sudo hostnamectl --transient set-hostname".split() + [new_domain],
+        "sudo hostnamectl --pretty    set-hostname".split() + [pretty_hostname]
+    ]
+
+    for command in commands:
+        p = subprocess.Popen(command,
+                             stdout=subprocess.PIPE,
+                             stderr=subprocess.STDOUT)
+
+        out, _ = p.communicate()
+
+        if p.returncode != 0:
+            logger.warning(command)
+            logger.warning(out)
+            raise MoulinetteError(errno.EIO, m18n.n('domain_hostname_failed'))
+        else:
+            logger.info(out)
+
     # Regen configurations
     try:
         with open('/etc/yunohost/installed', 'r') as f: