Scripts to help with examining middlewares

examine-middlewares.js

function examineMiddlewares(middlewares) {
    "use strict";

    let results = [];
    for (let middleware of middlewares) {
        let script = %FunctionGetScript(middleware);
        let position = %FunctionGetScriptSourcePosition(middleware);
        let line = script.source.slice(0, position).split("\n").length - 1;

        let source = %FunctionGetSourceCode(middleware);
        let functionScope = %GetFunctionScopeDetails(middleware, 0)[1];

        // Put any middleware-specific examining code here

        results.push(script.name + ":" + line + ": " + script.source.split("\n")[line].trim() + "\n" + source);
    }

    return results.join("\n");
}

koa-router.patch

--- a/lib/layer.js	2016-02-03 18:38:03.715769846 +1100
+++ b/lib/layer.js	2016-02-03 18:37:58.254769583 +1100
@@ -46,6 +46,27 @@
   this.regexp = pathToRegExp(path, this.paramNames, this.opts);
 
   debug('defined route %s %s', this.methods, this.opts.prefix + this.path);
+
+  if (!global.routes) {
+    global.routes = new Map();
+    setTimeout(function () {
+      console.warn(
+        Array.from(global.routes).sort((a, b) => a[0].localeCompare(b[0]))
+          .map((route) =>
+            `======> ${route[0]} <======\n` +
+            route[1].map((details) => [
+              "===> " + details.methods.join(" "),
+              examineMiddlewares(details.middleware),
+              details.stack.split("\n")[4]
+            ].join("\n")).join("\n")
+          ).join(`\n${"=".repeat(80)}\n`)
+      );
+    }, 5000);
+  }
+  var data = global.routes.get(this.opts.prefix + this.path);
+  if (!data)
+    global.routes.set(this.opts.prefix + this.path, data = []);
+  data.push({methods: this.methods, middleware: this.stack.slice(0), stack: new Error().stack});
 };
 
 /**