Ticket #4048: get_plugin_data.pre_activate-hooks.patch

plugin.php

@@ -28 +28 @@
                 $author = '<a href="' . trim( $author_uri[1] ) . '" title="'.__( 'Visit author homepage' ).'">' . trim( $author_name[1] ) . '</a>';
         }
 
-        return array('Name' => $name, 'Title' => $plugin, 'Description' => $description, 'Author' => $author, 'Version' => $version);
+        $plugin_data = apply_filters( 'get_plugin_data', array('Name' => $name, 'Title' => $plugin, 'Description' => $description, 'Author' => $author, 'Version' => $version) );
+
+        return $plugin_data;
 }
 
 function get_plugins() {
@@ -99 +101 @@
                         wp_redirect(add_query_arg('_error_nonce', wp_create_nonce('plugin-activation-error_' . $plugin), 'plugins.php?error=true&plugin=' . $plugin)); // we'll override this later if the plugin can be included without fatal error
                         ob_start();
                         @include(ABSPATH . PLUGINDIR . '/' . $plugin);
-                        $current[] = $plugin;
-                        sort($current);
-                        update_option('active_plugins', $current);
-                        do_action('activate_' . $plugin);
+                        $can_activate = apply_filters( 'before_activate_' . $plugin, true );
+                        if( $can_activate ) {
+                                $current[] = $plugin;
+                                sort($current);
+                                update_option('active_plugins', $current);
+                                do_action('activate_' . $plugin);
+                        }
                         ob_end_clean();
                 }