empty src dir error fix - fixes #7375

packages/babel-cli/src/babel/dir.js

@@ -63,6 +63,13 @@ export default function(commander, filenames, opts) {
     return path.join(commander.outDir, filename);
   }
 
+  function outputDestFolder(outDir) {
+    const outDirPath = path.resolve(outDir);
+    if (!fs.existsSync(outDirPath)) {
+      fs.mkdirSync(outDirPath);
+    }
+  }
+
   function handleFile(src, filename, base, callback) {
     if (typeof base === "function") {
       callback = base;
@@ -82,6 +89,11 @@ export default function(commander, filenames, opts) {
   }
 
   function sequentialHandleFile(files, dirname, index, callback) {
+    if (files.length === 0) {
+      outputDestFolder(commander.outDir);
+      return;
+    }
+
     if (typeof index === "function") {
       callback = index;
       index = 0;

packages/babel-cli/test/fixtures/babel/empty dir --out-dir/options.json

@@ -0,0 +1,3 @@
+{
+  "args": ["src", "--out-dir", "lib"]
+}