Prevent ignored files in out dir (#10831)

Co-Authored-By: Brian Ng <bng412@gmail.com>

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

@@ -84,8 +84,16 @@ export default async function({
 
   async function handleFile(src: string, base: string): Promise<boolean> {
     const written = await write(src, base);
-
-    if (!written && cliOptions.copyFiles) {
+    const relative = path.relative(base, src);
+    const isCompilableExtension = util.isCompilableExtension(
+      relative,
+      cliOptions.extensions,
+    );
+    if (
+      !written &&
+      ((!isCompilableExtension && cliOptions.copyFiles) ||
+        cliOptions.includeIgnored)
+    ) {
       const filename = path.relative(base, src);
       const dest = getDest(filename, base);
       outputFileSync(dest, fs.readFileSync(src));

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

@@ -161,6 +161,11 @@ commander.option(
   "Delete the out directory before compilation.",
 );
 
+commander.option(
+  "--include-ignored",
+  "Include ignored files when copying non-compilable files.",
+);
+
 commander.version(pkg.version + " (@babel/core " + version + ")");
 commander.usage("[options] <files ...>");
 // register an empty action handler so that commander.js can throw on
@@ -304,6 +309,7 @@ export default function parseArgv(args: Array<string>): CmdOptions | null {
       quiet: opts.quiet,
       deleteDirOnStart: opts.deleteDirOnStart,
       sourceMapTarget: opts.sourceMapTarget,
+      includeIgnored: opts.includeIgnored,
     },
   };
 }