Support rebuild event from dev server

Author: antgel

server.js

@@ -34,6 +34,8 @@ const DEFAULT_OPTIONS = {
   pathPrefix: "/",      // May be overridden by Eleventy, adds a virtual base directory to your project
   watch: [],            // Globs to pass to separate dev server chokidar for watching
   aliases: {},          // Aliasing feature
+  rebuildUrl: null,     // POST URL to trigger rebuild
+  rebuildUrlToken: "",  // Secret token in x-11ty-rebuild-token header
   indexFileName: "index.html", // Allow custom index file name
   useCache: false,      // Use a cache for file contents
   headers: {},          // Set default response headers
@@ -117,6 +119,10 @@ class EleventyDevServer {
     this.options.pathPrefix = this.cleanupPathPrefix(this.options.pathPrefix);
   }
 
+  setEventBus(_eventBus) {
+    this.eventBus = _eventBus;
+  }
+
   get watcher() {
     if(this.#watcher) {
       return this.#watcher;
@@ -481,6 +487,18 @@ class EleventyDevServer {
       return res.end("");
     }
 
+    if (this.options.rebuildUrl && req.url === this.options.rebuildUrl && req.method === 'POST') {
+      const token = req.headers['x-11ty-rebuild-token'];
+      if (token !== this.options.rebuildUrlToken) {
+        res.writeHead(403, { 'Content-Type': 'text/plain' });
+        return res.end('Forbidden');
+      }
+
+      this.eventBus.emit('eleventyDevServer.rebuild');
+      res.writeHead(200);
+      return res.end();
+    }
+
     for(let urlPatternString in this.options.onRequest) {
       let fn = this.options.onRequest[urlPatternString];
       let fullPath = this.getServerPath(urlPatternString);