added quiet flag (#167)

Author: sujaygarlanka

src/box-command.js

@@ -779,7 +779,9 @@ class BoxCommand extends Command {
 	 * @returns {void}
 	 */
 	info(content) {
-		process.stderr.write(`${content}${os.EOL}`);
+		if (!this.flags.quiet) {
+			process.stderr.write(`${content}${os.EOL}`);
+		}
 	}
 
 	/**
@@ -1131,12 +1133,17 @@ BoxCommand.flags = {
 		char: 'y',
 		description: 'Automatically respond yes to all confirmation prompts',
 	}),
+	quiet: flags.boolean({
+		char: 'q',
+		description: 'Suppress any non-error output to stderr',
+	})
 };
 
 BoxCommand.minFlags = _.pick(BoxCommand.flags, [
 	'no-color',
 	'help',
-	'verbose'
+	'verbose',
+	'quiet'
 ]);
 
 module.exports = BoxCommand;

test/commands/files.test.js

@@ -243,6 +243,22 @@ describe('Files', () => {
 				assert.equal(ctx.stderr, `Deleted file ${fileId}${os.EOL}`);
 			});
 
+		test
+			.nock(TEST_API_ROOT, api => api
+				.delete(`/2.0/files/${fileId}`)
+				.reply(204)
+			)
+			.stderr()
+			.command([
+				'files:delete',
+				fileId,
+				'--quiet',
+				'--token=test',
+			])
+			.it('should delete a file, but output no information to stderr', ctx => {
+				assert.equal(ctx.stderr, '');
+			});
+
 		test
 			.nock(TEST_API_ROOT, api => api
 				.delete(`/2.0/files/${fileId}`)