dovecot: set TZ=:/etc/localtime to improve performance

cmdeploy/src/cmdeploy/__init__.py

@@ -410,6 +410,13 @@ def _configure_dovecot(config: Config, debug: bool = False) -> bool:
             persist=True,
         )
 
+    timezone_env = files.line(
+        name="Set TZ environment variable",
+        path="/etc/environment",
+        line="TZ=:/etc/localtime",
+    )
+    need_restart |= timezone_env.changed
+
     return need_restart
 
 

cmdeploy/src/cmdeploy/tests/online/test_1_basic.py

@@ -65,6 +65,14 @@ class TestSSHExecutor:
         assert (now - since_date).total_seconds() < 60 * 60 * 51
 
 
+def test_timezone_env(remote):
+    for line in remote.iter_output("env"):
+        print(line)
+        if line == "tz=:/etc/localtime":
+            return True
+    pytest.fail("TZ is not set")
+
+
 def test_remote(remote, imap_or_smtp):
     lineproducer = remote.iter_output(imap_or_smtp.logcmd)
     imap_or_smtp.connect()