Merge branch 'unstable' into stretch-unstable

data/actionsmap/yunohost.yml

@@ -788,7 +788,7 @@ backup:
                     help: Name of the backup archive
                     extra:
                         pattern: &pattern_backup_archive_name
-                            - !!str ^[\w\-\._]{1,30}(?<!\.)$
+                            - !!str ^[\w\-\._]{1,50}(?<!\.)$
                             - "pattern_backup_archive_name"
                 -d:
                     full: --description

data/templates/yunohost/services.yml

@@ -16,6 +16,7 @@ redis-server:
   log: /var/log/redis/redis-server.log
 mysql:
   log: [/var/log/mysql.log,/var/log/mysql.err]
+  alternates: ['mariadb']
 glances: {}
 ssh:
   log: /var/log/auth.log

src/yunohost/service.py

@@ -227,6 +227,27 @@ def service_status(names=[]):
 
         status = _get_service_information_from_systemd(name)
 
+        # try to get status using alternative version if they exists
+        # this is for mariadb/mysql but is generic in case of
+        alternates = services[name].get("alternates", [])
+        while status is None and alternates:
+            status = _get_service_information_from_systemd(alternates.pop())
+
+        if status is None:
+            logger.error("Failed to get status information via dbus for service %s, systemctl didn't recognize this service ('NoSuchUnit')." % name)
+            result[name] = {
+                'status': "unknown",
+                'loaded': "unknown",
+                'active': "unknown",
+                'active_at': {
+                    "timestamp": "unknown",
+                    "human": "unknown",
+                },
+                'description': "Error: failed to get information for this service, it doesn't exists for systemd",
+                'service_file_path': "unknown",
+            }
+
+        else:
             translation_key = "service_description_%s" % name
             description = m18n.n(translation_key)
 
@@ -242,7 +263,7 @@ def service_status(names=[]):
                 'active': str(status.get("ActiveState", "unknown")),
                 'active_at': {
                     "timestamp": str(status.get("ActiveEnterTimestamp", "unknown")),
-                "human": datetime.fromtimestamp(status.get("ActiveEnterTimestamp") / 1000000).strftime("%F %X"),
+                    "human": datetime.fromtimestamp(status["ActiveEnterTimestamp"] / 1000000).strftime("%F %X") if "ActiveEnterTimestamp" in status else "unknown",
                 },
                 'description': description,
                 'service_file_path': str(status.get("FragmentPath", "unknown")),
@@ -256,13 +277,20 @@ def service_status(names=[]):
 def _get_service_information_from_systemd(service):
     "this is the equivalent of 'systemctl status $service'"
     import dbus
+    from dbus.exceptions import DBusException
 
     d = dbus.SystemBus()
 
     systemd = d.get_object('org.freedesktop.systemd1','/org/freedesktop/systemd1')
     manager = dbus.Interface(systemd, 'org.freedesktop.systemd1.Manager')
 
+    try:
         service_path = manager.GetUnit(service + ".service")
+    except DBusException as exception:
+        if exception.get_dbus_name() == 'org.freedesktop.systemd1.NoSuchUnit':
+            return None
+        raise
+
     service_proxy = d.get_object('org.freedesktop.systemd1', service_path)
 
     # unit_proxy = dbus.Interface(service_proxy, 'org.freedesktop.systemd1.Unit',)
@@ -698,11 +726,18 @@ def _get_files_diff(orig_file, new_file, as_string=False, skip_header=True):
     header can also be removed if skip_header is True.
 
     """
+
+    if os.path.exists(orig_file):
         with open(orig_file, 'r') as orig_file:
             orig_file = orig_file.readlines()
+    else:
+        orig_file = []
 
+    if not os.path.exists(new_file):
         with open(new_file, 'r') as new_file:
             new_file.readlines()
+    else:
+        new_file = []
 
     # Compare files and format output
     diff = unified_diff(orig_file, new_file)