index: add version reporting, support for `engines`

lib/index.js

@@ -72,7 +72,7 @@ export default class Now extends EventEmitter {
     this._files = hashes;
 
     const nowProperties = pkg.now || {};
-    const engines = nowProperties.engines;
+    const engines = nowProperties.engines || pkg.engines;
 
     const deployment = await retry(async (bail) => {
       if (this._debug) console.time('> [debug] /now/create');
@@ -115,6 +115,7 @@ export default class Now extends EventEmitter {
     }, { retries: 3, minTimeout: 2500, onRetry: this._onRetry });
 
     // we report about files whose sizes are too big
+    let missingVersion = false;
     if (deployment.warnings) {
       let sizeExceeded = 0;
       deployment.warnings.forEach((warning) => {
@@ -129,10 +130,11 @@ export default class Now extends EventEmitter {
           sizeExceeded++;
         } else if ('node_version_not_found' === warning.reason) {
           const { wanted, used } = warning;
-          console.error('> \u001b[31mWarning!\u001b[39m Requested node version %s is not available, using default version %s',
+          console.error('> \u001b[31mWarning!\u001b[39m Requested node version %s is not available',
             wanted,
             used
           );
+          missingVersion = true;
         }
       });
 
@@ -143,6 +145,16 @@ export default class Now extends EventEmitter {
       }
     }
 
+    if (engines.node) {
+      if (missingVersion) {
+        console.log(`> Using Node.js ${chalk.bold(deployment.nodeVersion)} (default)`);
+      } else {
+        console.log(`> Using Node.js ${chalk.bold(deployment.nodeVersion)} (requested: ${chalk.dim(`\`${engines.node}\``)})`);
+      }
+    } else {
+      console.log(`> Using Node.js ${chalk.bold(deployment.nodeVersion)} (default)`);
+    }
+
     this._id = deployment.deploymentId;
     this._host = deployment.url;
     this._missing = deployment.missing || [];