[FEATURE] Allow to disable the "Core Updater" through an env-variable

By setting the environment variable "TYPO3_DISABLE_CORE_UPDATER=1" the
Core Updater functionality is disabled in the Install Tool. This can
be useful for providers which have it's own means of upgrading the
Core.

Resolves: #52639
Releases: 6.2
Change-Id: I88272ea613d95512ad780cefa5e261cf2dc6a60c
Reviewed-on: https://review.typo3.org/24629
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn
Reviewed-by: Anja Leichsenring
Tested-by: Anja Leichsenring

typo3/sysext/install/Classes/Controller/Action/Tool/ImportantActions.php

@@ -79,6 +79,7 @@ class ImportantActions extends Action\AbstractAction implements Action\ActionInt
 			: FALSE;
 
 		$this->view
+			->assign('enableCoreUpdate', $this->isCoreUpdateEnabled())
 			->assign('operatingSystem', $operatingSystem)
 			->assign('cgiDetected', $cgiDetected)
 			->assign('databaseName', $GLOBALS['TYPO3_CONF_VARS']['DB']['database'])
@@ -92,6 +93,15 @@ class ImportantActions extends Action\AbstractAction implements Action\ActionInt
 		return $this->view->render();
 	}
 
+	/**
+	 * Check if this installation wants to enable the core updater
+	 *
+	 * @return boolean
+	 */
+	protected function isCoreUpdateEnabled() {
+		return (getenv('TYPO3_DISABLE_CORE_UPDATER') !== '1');
+	}
+
 	/**
 	 * Set new password if requested
 	 *

typo3/sysext/install/Resources/Private/Partials/Action/Tool/ImportantActions/CoreUpdateButton.html

@@ -4,28 +4,45 @@
 	The install tool can automatically update the TYPO3 CMS core to its latest
 	minor release if certain criteria are met.
 </p>
+
 <div id="coreUpdate">
-	<div id="messageTemplate">
-		<div class="typo3-message">
-			<div class="header-container">
-				<div class="message-header">
-					<strong></strong>
+	<f:if condition="{enableCoreUpdate}">
+		<f:then>
+			<div id="messageTemplate">
+				<div class="typo3-message">
+					<div class="header-container">
+						<div class="message-header">
+							<strong></strong>
+						</div>
+					</div>
+					<div class="message-body">
+					</div>
 				</div>
+				<p></p>
+			</div>
+			<div id="buttonTemplate">
+				<fieldset class="t3-install-form-submit">
+					<ol>
+						<li>
+							<button class="btn" type="submit" name="coreUpdateCheckForUpdate" data-action="checkForUpdate">
+								Check for core updates
+							</button>
+						</li>
+					</ol>
+				</fieldset>
 			</div>
-			<div class="message-body">
+		</f:then>
+		<f:else>
+			<div class="typo3-message message-notice">
+				<div class="header-container">
+					<div class="message-header">
+						<strong>Disabled</strong>
+					</div>
+				</div>
+				<div class="message-body">
+					This feature is disabled in this installation (through the environment variable <code>TYPO3_DISABLE_CORE_UPDATER=1</code>)
+				</div>
 			</div>
-		</div>
-		<p></p>
-	</div>
-	<div id="buttonTemplate">
-		<fieldset class="t3-install-form-submit">
-			<ol>
-				<li>
-					<button class="btn" type="submit" name="coreUpdateCheckForUpdate" data-action="checkForUpdate">
-						Check for core updates
-					</button>
-				</li>
-			</ol>
-		</fieldset>
-	</div>
+		</f:else>
+	</f:if>
 </div>
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