From 2c7bbef8b26590f040ee4f855cc3885a1287748c Mon Sep 17 00:00:00 2001
From: Darek Kay <darekkay@gmail.com>
Date: Thu, 31 Oct 2019 10:33:47 +0100
Subject: [PATCH] Show an error and help if a CLI command is missing

See also: https://github.com/tj/commander.js/issues/432
---
 bin/static-marks.js | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/bin/static-marks.js b/bin/static-marks.js
index 0971f52..4199390 100644
--- a/bin/static-marks.js
+++ b/bin/static-marks.js
@@ -10,7 +10,7 @@ const importBookmarks = require("./import");
 
 program
   .description(pkg.description)
-  .usage("[options] <command>")
+  .usage("<command> [options]")
   .version(pkg.version);
 
 // build
@@ -44,6 +44,11 @@ program
 
 program.parse(process.argv);
 
-if (program.args.length === 0) {
+// eslint-disable-next-line no-underscore-dangle
+const commands = program.args.filter(argument => argument._name);
+
+// missing/unknown subcommand
+if (program.args.length === 0 || commands.length === 0) {
+  console.error(`Error: Missing or unknown command.\n`);
   program.help();
 }