core: node版本需求降至node10.4

packages/hydrooj/bin/hydrooj.js

@@ -10,7 +10,11 @@ const argv = require('cac')().parse();
 const child = require('child_process');
 const esbuild = require('esbuild');
 
+const major = +process.version.split('.')[0].split('v')[1];
+const minor = +process.version.split('.')[1];
+
 let transformTimeUsage = 0;
+let transformCount = 0;
 let displayTimeout;
 function transform(type, filename) {
     const start = new Date();
@@ -19,16 +23,22 @@ function transform(type, filename) {
         sourcemap: 'inline',
         platform: 'node',
         format: 'cjs',
-        target: `node${process.version.split('.')[0].split('v')[1]}`,
+        target: `node${major}.${minor}`,
         jsx: 'transform',
         write: false,
     });
     if (result.warnings.length) console.warn(result.warnings);
     transformTimeUsage += new Date().getTime() - start.getTime();
+    transformCount++;
     if (displayTimeout) clearTimeout(displayTimeout);
-    displayTimeout = setTimeout(() => console.log(`Code transform took ${transformTimeUsage}ms`), 1000);
+    displayTimeout = setTimeout(() => console.log(`Transformed ${transformCount} files. (${transformTimeUsage}ms)`), 1000);
     return result.outputFiles[0].text;
 }
+if (major < 14) {
+    require.extensions['.js'] = function loader(module, filename) {
+        return module._compile(transform('js', filename), filename);
+    };
+}
 require.extensions['.ts'] = function loader(module, filename) {
     return module._compile(transform('ts', filename), filename);
 };