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diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
--- a/src/__phutil_library_map__.php
+++ b/src/__phutil_library_map__.php
@@ -2014,6 +2014,7 @@
'PhabricatorDaemonManagementStatusWorkflow' => 'applications/daemon/management/PhabricatorDaemonManagementStatusWorkflow.php',
'PhabricatorDaemonManagementStopWorkflow' => 'applications/daemon/management/PhabricatorDaemonManagementStopWorkflow.php',
'PhabricatorDaemonManagementWorkflow' => 'applications/daemon/management/PhabricatorDaemonManagementWorkflow.php',
+ 'PhabricatorDaemonOverseerModule' => 'infrastructure/daemon/overseer/PhabricatorDaemonOverseerModule.php',
'PhabricatorDaemonReference' => 'infrastructure/daemon/control/PhabricatorDaemonReference.php',
'PhabricatorDaemonTaskGarbageCollector' => 'applications/daemon/garbagecollector/PhabricatorDaemonTaskGarbageCollector.php',
'PhabricatorDaemonTasksTableView' => 'applications/daemon/view/PhabricatorDaemonTasksTableView.php',
@@ -6076,6 +6077,7 @@
'PhabricatorDaemonManagementStatusWorkflow' => 'PhabricatorDaemonManagementWorkflow',
'PhabricatorDaemonManagementStopWorkflow' => 'PhabricatorDaemonManagementWorkflow',
'PhabricatorDaemonManagementWorkflow' => 'PhabricatorManagementWorkflow',
+ 'PhabricatorDaemonOverseerModule' => 'PhutilDaemonOverseerModule',
'PhabricatorDaemonReference' => 'Phobject',
'PhabricatorDaemonTaskGarbageCollector' => 'PhabricatorGarbageCollector',
'PhabricatorDaemonTasksTableView' => 'AphrontView',
diff --git a/src/infrastructure/daemon/overseer/PhabricatorDaemonOverseerModule.php b/src/infrastructure/daemon/overseer/PhabricatorDaemonOverseerModule.php
new file mode 100644
--- /dev/null
+++ b/src/infrastructure/daemon/overseer/PhabricatorDaemonOverseerModule.php
@@ -0,0 +1,41 @@
+<?php
+
+final class PhabricatorDaemonOverseerModule
+ extends PhutilDaemonOverseerModule {
+
+ private $configVersion;
+
+ public function __construct() {
+ $this->configVersion = $this->getConfigVersion();
+ }
+
+ public function shouldRestartDaemons() {
+ $config_version = $this->getConfigVersion();
+
+ if ($this->configVersion != $config_version) {
+ $this->configVersion = $config_version;
+ return true;
+ }
+
+ return false;
+ }
+
+ /**
+ * Calculate a version number for the current Phabricator configuration.
+ *
+ * The version number has no real meaning and does not provide any real
+ * indication of whether a configuration entry has been changed. The config
+ * version is intended to be a rough indicator that "something has changed",
+ * which indicates to the overseer that the daemons should be reloaded.
+ *
+ * @return int
+ */
+ private function getConfigVersion() {
+ $conn_r = id(new PhabricatorConfigEntry())->establishConnection('r');
+ return head(queryfx_one(
+ $conn_r,
+ 'SELECT MAX(id) FROM %T',
+ 'config_transaction'));
+ }
+
+}

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