From 09156af47563a91c10c0ecef15479a27a3ab15c0 Mon Sep 17 00:00:00 2001
From: Jermolene <jeremy@osmosoft.com>
Date: Sat, 3 May 2014 19:49:50 +0100
Subject: [PATCH] Add support for "before" field on startup modules

---
 boot/boot.js                                          | 11 +++++++++++
 .../tw5.com/tiddlers/mechanisms/StartupMechanism.tid  |  9 +++++----
 2 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/boot/boot.js b/boot/boot.js
index 14b9b4615..1e15653d0 100644
--- a/boot/boot.js
+++ b/boot/boot.js
@@ -1750,6 +1750,7 @@ $tw.boot.executeNextStartupTask = function() {
 		if($tw.boot.isStartupTaskEligible(task)) {
 			// Remove this task from the list
 			$tw.boot.remainingStartupModules.splice(taskIndex,1);
+console.log("Executing task",task.name);
 			// Execute it
 			if(!$tw.utils.hop(task,"synchronous") || task.synchronous) {
 				task.startup();
@@ -1783,6 +1784,16 @@ $tw.boot.isStartupTaskEligible = function(taskModule) {
 			}
 		}
 	}
+	// Check that no other outstanding tasks must be executed before this one
+	var name = taskModule.name,
+		remaining = $tw.boot.remainingStartupModules;
+	if(name) {
+		for(t=0; t<remaining.length; t++) {
+			if(remaining[t].before && remaining[t].before.indexOf(name) !== -1) {
+				return false;
+			}
+		}
+	}
 	// Check that all of the tasks that we must be performed after has been done
 	var after = taskModule.after;
 	if(after) {
diff --git a/editions/tw5.com/tiddlers/mechanisms/StartupMechanism.tid b/editions/tw5.com/tiddlers/mechanisms/StartupMechanism.tid
index 9838f6203..33502fbf6 100644
--- a/editions/tw5.com/tiddlers/mechanisms/StartupMechanism.tid
+++ b/editions/tw5.com/tiddlers/mechanisms/StartupMechanism.tid
@@ -10,11 +10,12 @@ The startup mechanism runs the installed startup modules at the end of the [[boo
 
 Modules with their ''module-type'' field set to `startup`:
 
-* Must expose a `startup` function
+* Must export a `startup` function
 ** For synchronous startup modules the startup function is called as `startup()`, asynchronous modules are passed a callback they must invoke on completion: `startup(callback)`
-* May expose a `name` property that is used to identify the task
-* May expose a `after` property containing an array of names of dependent tasks that must be run before this one
-* May expose a `platforms` property containing an array of names of platforms that are required in order for the startup module to be executed. The defined platforms are ''node'' and ''browser''
+* May export a `name` property that is used to identify the task
+* May export a `after` property containing an array of names of dependent tasks that must be run before this one
+* May export a `before` property containing an array of names of tasks that must be run after this one
+* May export a `platforms` property containing an array of names of platforms that are required in order for the startup module to be executed. The defined platforms are ''node'' and ''browser''
 
 ! Startup Processing