From 9c1b30860c3d3af7985e342956cff5a1eada4e31 Mon Sep 17 00:00:00 2001
From: Dion Hulse <dd32@git.wordpress.org>
Date: Fri, 13 Sep 2013 12:52:28 +0000
Subject: [PATCH] Upgrader: Allow plugins to short-circuit the package
 download. Props rmccue and DrewAPicture. Fixes #22378

git-svn-id: https://develop.svn.wordpress.org/trunk@25427 602fd350-edb4-49c9-b593-d223f7449a82
---
 src/wp-admin/includes/class-wp-upgrader.php | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/src/wp-admin/includes/class-wp-upgrader.php b/src/wp-admin/includes/class-wp-upgrader.php
index d1bc082059..657e4fa88c 100644
--- a/src/wp-admin/includes/class-wp-upgrader.php
+++ b/src/wp-admin/includes/class-wp-upgrader.php
@@ -108,6 +108,19 @@ class WP_Upgrader {
 
 	function download_package($package) {
 
+		/**
+		 * Filter whether to return the package.
+		 *
+		 * @since 3.7.0
+		 *
+		 * @param bool    $reply   Whether to bail without returning the package. Default is false.
+		 * @param string  $package The package file name.
+		 * @param object  $this    The WP_Upgrader instance.
+		 */
+		$reply = apply_filters( 'upgrader_pre_download', false, $package, $this );
+		if ( false !== $reply )
+			return $reply;
+
 		if ( ! preg_match('!^(http|https|ftp)://!i', $package) && file_exists($package) ) //Local file or remote?
 			return $package; //must be a local file..