service: add systemd template support

library/service

@@ -369,10 +369,20 @@ class LinuxService(Service):
         elif location.get('systemctl', None):
 
             # verify service is managed by systemd
-            rc, out, err = self.execute_command("%s --all" % (location['systemctl']))
-            look_for = "%s.service" % self.name
-            if look_for in out:
-                self.enable_cmd = location['systemctl']
+            rc, out, err = self.execute_command("%s list-unit-files" % (location['systemctl']))
+
+            # adjust the service name to account for template service unit files
+            index = self.name.find('@')
+            if index == -1:
+                name = self.name
+            else:
+                name = self.name[:index+1]
+
+            look_for = "%s.service" % name
+            for line in out.splitlines():
+               if line.startswith(look_for):
+                   self.enable_cmd = location['systemctl']
+                   break
 
         # Locate a tool for runtime service management (start, stop etc.)
         self.svc_cmd = ''
@@ -473,10 +483,15 @@ class LinuxService(Service):
                 return
 
         if self.enable_cmd.endswith("systemctl"):
-            (rc, out, err) = self.execute_command("%s is-enabled %s.service" % (self.enable_cmd, self.name))
-            if self.enable and rc == 0:
-                return
-            elif not self.enable and rc == 1:
+            (rc, out, err) = self.execute_command("%s show %s.service" % (self.enable_cmd, self.name))
+
+            d = dict(line.split('=', 1) for line in out.splitlines())
+            if "UnitFileState" in d:
+                if self.enable and d["UnitFileState"] == "enabled":
+                    return
+                elif not self.enable and d["UnitFileState"] == "disabled":
+                    return
+            elif not self.enable:
                 return
 
         # we change argument depending on real binary used