feat: read just the first line

package.json

@@ -3,13 +3,15 @@
   "version": "0.0.0",
   "description": "Create mocks servers with its schemas",
   "main": "src/index.js",
+  "type": "module",
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1",
     "start": "node ."
   },
   "author": "",
   "license": "MPL-2.0",
   "dependencies": {
+    "n-readlines": "^1.0.1",
     "open-api-mocker": "github:adantoscano/open-api-mocker"
   }
 }

src/services/find-oas-from-dir.js

@@ -1,10 +1,12 @@
 import path from 'path';
 import * as fs from 'fs';
+import nReadlines from 'n-readlines'
 
 function isOas(filePath) {
-  const fileString = fs.readFileSync(filePath, 'utf8')
+  const line = new nReadlines(filePath);
+  const firstLine = line.next().toString();
   const oasRegEx = /^openapi/i
-  return oasRegEx.test(fileString);
+  return oasRegEx.test(firstLine);
 }
 
 export default function findOasFromDir(startPath) {
@@ -18,7 +20,7 @@ export default function findOasFromDir(startPath) {
     const filePath = path.join(startPath, file);
     const stat = fs.lstatSync(filePath);
     if (stat.isDirectory()) {
-      return [...acc, ...findOasFromDir(filePath)]; //recurse
+      return [...acc, ...findOasFromDir(filePath)];
     } 
     if (file.endsWith('.yaml') && isOas(filePath)) {
       console.log('-- found: ', filePath);