Support attribute substitution in span message

Author: petyosi

examples/cloudflare-worker/package.json

@@ -6,7 +6,6 @@
 		"deploy": "wrangler deploy",
 		"dev": "wrangler dev",
 		"start": "wrangler dev",
-		"test": "vitest",
 		"cf-typegen": "wrangler types"
 	},
 	"devDependencies": {

examples/express/app.ts

@@ -1,6 +1,6 @@
-import type { Express, Response, Request } from 'express'
+import type { Express, Request, Response } from "express";
 import express from "express";
-import * as logfire from 'logfire';
+import * as logfire from "logfire";
 
 const PORT: number = parseInt(process.env.EXPRESS_PORT || "8080");
 const app: Express = express();
@@ -9,29 +9,32 @@ function getRandomNumber(min: number, max: number) {
   return Math.floor(Math.random() * (max - min) + min);
 }
 
-
 app.get("/rolldice", (req, res) => {
   // read the query parameter error
   const error = req.query.error;
   if (error) {
     throw new Error("An error occurred");
   }
 
-
-  logfire.startActiveSpan(logfire.Level.Info, "parent-span", {}, {}, async (parentSpan) => {
-    logfire.info('child span')
-    parentSpan.end();
-  });
+  logfire.span(
+    "parent-span",
+    {},
+    {},
+    async (parentSpan) => {
+      logfire.info("child span");
+      parentSpan.end();
+    },
+  );
 
   res.send(getRandomNumber(1, 6).toString());
 });
 
 // Report an error to Logfire, using the Express error handler.
 app.use((err: Error, _req: Request, res: Response, _next: () => unknown) => {
-  logfire.reportError(err.message, err)
-  res.status(500)
-  res.send('An error occured')
-})
+  logfire.reportError(err.message, err);
+  res.status(500);
+  res.send("An error occured");
+});
 
 app.listen(PORT, () => {
   console.log(`Listening for requests on http://localhost:${PORT}/rolldice`);

package-lock.json

@@ -6,7 +6,7 @@
   "scripts": {
     "dev": "turbo watch dev",
     "build": "turbo build",
-    "test": "echo \"Error: no test specified\" && exit 1",
+    "test": "turbo test",
     "release": "turbo build && npx @changesets/cli publish",
     "changeset-add": "npx @changesets/cli add",
     "ci": "turbo typecheck lint"

package.json

@@ -46,7 +46,8 @@
     "preview": "vite preview",
     "typecheck": "tsc",
     "prepack": "cp ../../LICENSE .",
-    "postpack": "rm LICENSE"
+    "postpack": "rm LICENSE",
+    "test": "vitest"
   },
   "devDependencies": {
     "@opentelemetry/api": "^1.9.0",
@@ -56,7 +57,7 @@
     "typescript": "^5.8.2",
     "vite": "^6.2.0",
     "vite-plugin-dts": "^4.5.3",
-    "vitest": "^3.0.8"
+    "vitest": "^3.1.1"
   },
   "peerDependencies": {
     "@opentelemetry/api": "^1.9.0"