Log dev server access for log level verbose or more

packages/core/parcel-bundler/src/Server.js

@@ -40,6 +40,8 @@ function middleware(bundler) {
   });
 
   return function(req, res, next) {
+    logAccessIfVerbose();
+
     // Wait for the bundler to finish bundling if needed
     if (bundler.pending) {
       bundler.once('bundled', respond);
@@ -107,6 +109,13 @@ function middleware(bundler) {
       res.writeHead(404);
       res.end();
     }
+
+    function logAccessIfVerbose() {
+      const protocol = req.connection.encrypted ? 'https' : 'http';
+      const fullUrl = `${protocol}://${req.headers.host}${req.url}`;
+
+      logger.verbose(fullUrl);
+    }
   };
 }
 

packages/core/parcel-bundler/test/server.js

@@ -1,9 +1,11 @@
 const assert = require('assert');
 const path = require('path');
 const fs = require('@parcel/fs');
+const logger = require('@parcel/Logger');
 const {bundler} = require('./utils');
 const http = require('http');
 const https = require('https');
+const sinon = require('sinon');
 
 describe('server', function() {
   let server;
@@ -214,4 +216,39 @@ describe('server', function() {
       await fs.readFile(path.join(__dirname, '/dist/index.html'), 'utf8')
     );
   });
+
+  it('should not log dev server access for log level <= 3', async function() {
+    let b = bundler(path.join(__dirname, '/integration/html/index.html'), {
+      publicUrl: '/'
+    });
+    server = await b.serve(0);
+    const spy = sinon.spy(logger, 'verbose');
+    await get('/');
+
+    assert(!spy.called);
+
+    // restore back defaults
+    logger.verbose.restore();
+  });
+
+  it('should log dev server access for log level > 3', async function() {
+    let b = bundler(path.join(__dirname, '/integration/html/index.html'), {
+      publicUrl: '/'
+    });
+    server = await b.serve(0);
+    logger.setOptions({logLevel: 4});
+    const spy = sinon.spy(logger, 'verbose');
+
+    assert(!spy.called);
+
+    await get('/');
+
+    assert(spy.calledOnce);
+    // partial matching for call args, since port is a moving target
+    assert(spy.args[0][0].includes('http://localhost'));
+
+    // restore back defaults
+    logger.verbose.restore();
+    logger.setOptions({logLevel: 3});
+  });
 });