Returns a list of all the existing revision numbers for the node passed in.
Drupal\node\Node $node: The node entity.
An associative array keyed by node revision number.
function node_revision_list(Node $node) {
$revisions = array();
$result = db_query('SELECT r.vid, r.title, r.log, r.uid, n.vid AS current_vid, r.timestamp, u.name FROM {node_revision} r LEFT JOIN {node} n ON n.vid = r.vid INNER JOIN {users} u ON u.uid = r.uid WHERE r.nid = :nid ORDER BY r.vid DESC', array(
':nid' => $node->nid,
));
foreach ($result as $revision) {
$revisions[$revision->vid] = $revision;
}
return $revisions;
}