Fix #8326, add back --quiet option. (#10399)

* Fix issue #8326, quiet the @babel/cli with --quiet cli option.

* --quiet and --verbose options now conflict with each other.

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

@@ -129,11 +129,13 @@ export default async function({
       compiledFiles += await handle(filename);
     }
 
-    console.log(
-      `Successfully compiled ${compiledFiles} ${
-        compiledFiles !== 1 ? "files" : "file"
-      } with Babel.`,
-    );
+    if (!cliOptions.quiet) {
+      console.log(
+        `Successfully compiled ${compiledFiles} ${
+          compiledFiles !== 1 ? "files" : "file"
+        } with Babel.`,
+      );
+    }
   }
 
   if (cliOptions.watch) {

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

@@ -144,7 +144,14 @@ commander.option(
   "--include-dotfiles",
   "Include dotfiles when compiling and copying non-compilable files",
 );
-commander.option("--verbose", "Log everything");
+commander.option(
+  "--verbose",
+  "Log everything. This option conflicts with --quiet",
+);
+commander.option(
+  "--quiet",
+  "Don't log anything. This option conflicts with --verbose",
+);
 commander.option(
   "--delete-dir-on-start",
   "Delete the out directory before compilation",
@@ -207,6 +214,10 @@ export default function parseArgv(args: Array<string>): CmdOptions | null {
     errors.push("--delete-dir-on-start requires --out-dir");
   }
 
+  if (commander.verbose && commander.quiet) {
+    errors.push("--verbose and --quiet cannot be used together");
+  }
+
   if (
     !commander.outDir &&
     filenames.length === 0 &&
@@ -282,6 +293,7 @@ export default function parseArgv(args: Array<string>): CmdOptions | null {
       copyFiles: opts.copyFiles,
       includeDotfiles: opts.includeDotfiles,
       verbose: opts.verbose,
+      quiet: opts.quiet,
       deleteDirOnStart: opts.deleteDirOnStart,
       sourceMapTarget: opts.sourceMapTarget,
     },