Pause backup scheduling and atomically deploy workstation updates

tests/test_backup.py

@@ -175,6 +175,30 @@ class BackupTests(unittest.TestCase):
             with self.assertRaises(m.BackupError):
                 self.runner.validate_final_inventory(before, after)
 
+    def test_installer_preserves_config_and_key_and_pauses_timer(self):
+        home = self.root/'install-home'
+        config = home/'.config/nextcloud-borg-backup'
+        config.mkdir(parents=True)
+        (config/'config').write_text('# preserved custom config\n')
+        (config/'passphrase').write_text('existing-test-key')
+        fake = self.root/'fake-bin'
+        fake.mkdir()
+        commands = self.root/'systemctl-calls'
+        (fake/'systemctl').write_text('#!/bin/sh\nprintf "%s\\n" "$*" >> "$CALL_LOG"\nexit 0\n')
+        (fake/'systemctl').chmod(0o755)
+        env = dict(os.environ, HOME=str(home), XDG_CONFIG_HOME=str(home/'.config'),
+                   XDG_STATE_HOME=str(home/'.local/state'), PATH=str(fake)+':'+os.environ['PATH'],
+                   CALL_LOG=str(commands))
+        subprocess.run([str(ROOT/'scripts/install.sh')], env=env, check=True, stdout=subprocess.DEVNULL)
+        self.assertEqual((config/'config').read_text(), '# preserved custom config\n')
+        self.assertEqual((config/'passphrase').read_text(), 'existing-test-key')
+        calls = commands.read_text()
+        self.assertIn('stop nextcloud-borg-backup.service nextcloud-borg-backup.timer', calls)
+        self.assertIn('restart nextcloud-borg-backup.timer nextcloud-borg-health.timer', calls)
+        self.assertEqual((home/'.local/libexec/nextcloud-borg-runner.py').read_bytes(),
+                         (ROOT/'scripts/nextcloud-borg-runner.py').read_bytes())
+        self.assertEqual(list(home.rglob('*.new')), [])
+
     def test_pending_maintenance_survives_interrupted_attempt_record(self):
         import time
         self.runner.success = {'completed_at': time.time(), 'maintenance_pending': True}