chatbot.php

<?php
function chatbot_civicrm_alterSettingsFolders(&$metaDataFolders = NULL) {
  var_dump('calling chatbot_civicrm_alterSettingsFolders');
  _chatbot_civix_civicrm_alterSettingsFolders($metaDataFolders);
}

commentary.md

The output of testScript.sh shows that chatbot_civicrm_alterSettingsFolders is being called but for some reason, the folder is not always added to $metaDataFolders.

Next step is to dig into \Civi::dispatcher()->dispatch('hook_' . $fnSuffix, $event);

I have had a look at Civi\Core\Event\GenericHookEvent but am struggling to work outwhere the dispatch method is (would be nice to step through with a debugger but do not have one configured).

CRM_Utils_Hook.php

<?php
public function invoke(
    $names,
    &$arg1, &$arg2, &$arg3, &$arg4, &$arg5, &$arg6,
    $fnSuffix
  ) {
    if (is_array($names) && !defined('CIVICRM_FORCE_LEGACY_HOOK') && \Civi\Core\Container::isContainerBooted()) {
      $event = \Civi\Core\Event\GenericHookEvent::createOrdered(
        $names,
        array(&$arg1, &$arg2, &$arg3, &$arg4, &$arg5, &$arg6)
      );
      \Civi::dispatcher()->dispatch('hook_' . $fnSuffix, $event);

      if ($names[0] == 'settingsFolders') { //added some debugging code
        var_dump($arg1);
      }
      return $event->getReturnValues();
    }
    else {
      $count = is_array($names) ? count($names) : $names;
      return $this->invokeViaUF($count, $arg1, $arg2, $arg3, $arg4, $arg5, $arg6, $fnSuffix);
    }
  }

testScript.sh

# Output of 
cv ext:enable angularex
cv ext:uninstall angularex

# is as follows
Enabling extension "org.civicrm.angularex"
/buildkit/build/chatbot/sites/all/modules/civicrm/tools/extensions/civicrm-chatbot/chatbot.php:154:
string(44) "calling chatbot_civicrm_alterSettingsFolders"
/buildkit/build/chatbot/sites/all/modules/civicrm/CRM/Utils/Hook.php:166:
array(2) {
  [0] =>
  string(59) "/buildkit/build/chatbot/sites/all/modules/civicrm//settings"
  [1] =>
  string(91) "/buildkit/build/chatbot/sites/all/modules/civicrm/tools/extensions/civicrm-chatbot/settings"
}
Uninstalling extension "org.civicrm.angularex"
/buildkit/build/chatbot/sites/all/modules/civicrm/tools/extensions/civicrm-chatbot/chatbot.php:154:
string(44) "calling chatbot_civicrm_alterSettingsFolders"
/buildkit/build/chatbot/sites/all/modules/civicrm/CRM/Utils/Hook.php:166:
array(2) {
  [0] =>
  string(59) "/buildkit/build/chatbot/sites/all/modules/civicrm//settings"
  [1] =>
  string(91) "/buildkit/build/chatbot/sites/all/modules/civicrm/tools/extensions/civicrm-chatbot/settings"
}
/buildkit/build/chatbot/sites/all/modules/civicrm/tools/extensions/civicrm-chatbot/chatbot.php:154:
string(44) "calling chatbot_civicrm_alterSettingsFolders"
/buildkit/build/chatbot/sites/all/modules/civicrm/CRM/Utils/Hook.php:166:
array(1) {
  [0] =>
  string(59) "/buildkit/build/chatbot/sites/all/modules/civicrm//settings"
}