[enh] Add reboot/shutdown actions in tools (#190)

* [enh] Implements shutdown/reboot helpers.
* [enh] Improve reboot/shutdown help.

data/actionsmap/yunohost.yml

@@ -1478,6 +1478,26 @@ tools:
                     extra:
                         pattern: *pattern_port
 
+        ### tools_shutdown()
+        shutdown:
+            action_help: Shutdown the server
+            api: PUT /shutdown
+            arguments:
+                -f:
+                    help: skip the shutdown confirmation
+                    full: --force
+                    action: store_true
+
+        ### tools_reboot()
+        reboot:
+            action_help: Reboot the server
+            api: PUT /reboot
+            arguments:
+                -f:
+                    help: skip the reboot confirmation
+                    full: --force
+                    action: store_true
+
     subcategories:
 
       migrations:

locales/en.json

@@ -276,6 +276,10 @@
     "restore_running_app_script": "Running restore script of app '{app:s}'...",
     "restore_running_hooks": "Running restoration hooks...",
     "restore_system_part_failed": "Unable to restore the '{part:s}' system part",
+    "server_shutdown": "The server will shutdown",
+    "server_shutdown_confirm": "The server will shutdown immediatly, are you sure? [{answers:s}]",
+    "server_reboot": "The server will reboot",
+    "server_reboot_confirm": "The server will reboot immediatly, are you sure? [{answers:s}]",
     "service_add_failed": "Unable to add service '{service:s}'",
     "service_added": "The service '{service:s}' has been added",
     "service_already_started": "Service '{service:s}' has already been started",

src/yunohost/tools.py

@@ -39,7 +39,7 @@ from importlib import import_module
 import apt
 import apt.progress
 
-from moulinette import msettings, m18n
+from moulinette import msettings, msignals, m18n
 from moulinette.core import MoulinetteError, init_authenticator
 from moulinette.utils.log import getActionLogger
 from moulinette.utils.filesystem import read_json, write_to_json
@@ -632,6 +632,39 @@ def tools_port_available(port):
         return False
 
 
+def tools_shutdown(force=False):
+    shutdown = force
+    if not shutdown:
+        try:
+            # Ask confirmation for server shutdown
+            i = msignals.prompt(m18n.n('server_shutdown_confirm', answers='y/N'))
+        except NotImplemented:
+            pass
+        else:
+            if i.lower() == 'y' or i.lower() == 'yes':
+                shutdown = True
+
+    if shutdown:
+        logger.warn(m18n.n('server_shutdown'))
+        subprocess.check_call(['systemctl', 'poweroff'])
+
+
+def tools_reboot(force=False):
+    reboot = force
+    if not reboot:
+        try:
+            # Ask confirmation for restoring
+            i = msignals.prompt(m18n.n('server_reboot_confirm', answers='y/N'))
+        except NotImplemented:
+            pass
+        else:
+            if i.lower() == 'y' or i.lower() == 'yes':
+                reboot = True
+    if reboot:
+        logger.warn(m18n.n('server_reboot'))
+        subprocess.check_call(['systemctl', 'reboot'])
+
+
 def tools_migrations_list():
     """
     List existing migrations