Issue #2971699 by amateescu, timmillwood, catch, plach, Sam152: Content...

Issue #2971699 by amateescu, timmillwood, catch, plach, Sam152: Content Moderation and Workspace don't work together

core/modules/content_moderation/content_moderation.install

@@ -5,6 +5,21 @@
  * Install, update and uninstall functions for the Content Moderation module.
  */
 
+/**
+ * Implements hook_requirements().
+ */
+function content_moderation_requirements($phase) {
+  $requirements = [];
+  if ($phase === 'install' && \Drupal::moduleHandler()->moduleExists('workspace')) {
+    $requirements['workspace_incompatibility'] = [
+      'severity' => REQUIREMENT_ERROR,
+      'description' => t('Content Moderation can not be installed when Workspace is also installed.'),
+    ];
+  }
+
+  return $requirements;
+}
+
 /**
  * Remove the 'content_revision_tracker' table.
  */

core/modules/workspace/workspace.install

@@ -7,6 +7,21 @@
 
 use Drupal\workspace\Entity\Workspace;
 
+/**
+ * Implements hook_requirements().
+ */
+function workspace_requirements($phase) {
+  $requirements = [];
+  if ($phase === 'install' && \Drupal::moduleHandler()->moduleExists('content_moderation')) {
+    $requirements['workspace_incompatibility'] = [
+      'severity' => REQUIREMENT_ERROR,
+      'description' => t('Workspace can not be installed when Content Moderation is also installed.'),
+    ];
+  }
+
+  return $requirements;
+}
+
 /**
  * Implements hook_install().
  */