fix(web): return port from http-server process

packages/web/src/executors/file-server/file-server.impl.ts

@@ -203,19 +203,52 @@ export default async function* fileServerExecutor(
   };
   process.on('exit', processExitListener);
   process.on('SIGTERM', processExitListener);
-  serve.stdout.on('data', (chunk) => {
-    if (chunk.toString().indexOf('GET') === -1) {
-      process.stdout.write(chunk);
-    }
-  });
+
+  // TODO(caleb): should this be in devkit?
+  function stripConsoleColors(log: string): string {
+    return log?.replace(
+      /[\u001b\u009b][[()#;?]*(?:[0-9]{1,4}(?:;[0-9]{0,4})*)?[0-9A-ORZcf-nqry=><]/g,
+      ''
+    );
+  }
+
+  const getPortFromOuput = async () => {
+    return new Promise((res, rej) => {
+      serve.stdout.on('data', (chunk) => {
+        const str = chunk.toString();
+        // need to strip colors other wise the port includes color codes
+        // which cause cypress to throw reading the url;
+        const lines = stripConsoleColors(str).split('\n');
+        // Available on:
+        //   http://localhost:8081
+        // Hit CTRL-C to stop the server
+        const line = lines?.find((l) => l.includes(options.host))?.trim();
+        if (line) {
+          const u = new URL(line);
+
+          if (u.port) {
+            res(u.port);
+          } else {
+            rej('Could not find port');
+          }
+        }
+
+        if (str.indexOf('GET') === -1) {
+          process.stdout.write(chunk);
+        }
+      });
+    });
+  };
   serve.stderr.on('data', (chunk) => {
     process.stderr.write(chunk);
   });
 
+  const port = await getPortFromOuput();
+
   yield {
     success: true,
     baseUrl: `${options.ssl ? 'https' : 'http'}://${options.host}:${
-      options.port
+      port || options.port
     }`,
   };