Add didyoumean (#31)

* Add didyoumean

* Add comment

* Fix style issues

* Implement like in linked comment

Author: LapinoLapidus

Diff for: bin/index.js

@@ -4,6 +4,7 @@
 
 const chalk = require('chalk');
 const program = require('commander');
+const didYouMean = require('didyoumean');
 
 const { version } = require('../package');
 
@@ -44,11 +45,22 @@ program
   .description('Shows all commands available')
   .action(showCommands);
 
+const suggestCommands = cmd => {
+  const availableCommands = program.commands.map(c => c._name);
+
+  // Get a suggestion from didyoumean.js based on the input.
+  const suggestion = didYouMean(cmd, availableCommands);
+  if (suggestion) {
+    console.log(`  ` + chalk.red(`Did you mean ${chalk.yellow(suggestion)}?`));
+  }
+};
+
 // Validates any random command fired in
 program.arguments('<command>').action(cmd => {
   program.outputHelp();
   console.log(`  ` + chalk.red(`\n  Unknown command ${chalk.yellow(cmd)}.`));
   console.log();
+  suggestCommands(cmd);
 });
 
 program.parse(process.argv);

Diff for: package-lock.json

@@ -46,6 +46,7 @@
     "chalk": "^2.4.1",
     "cli-table3": "^0.5.1",
     "commander": "^2.18.0",
+    "didyoumean": "^1.2.1",
     "execa": "^1.0.0",
     "inquirer": "^6.2.0",
     "node-banner": "^1.3.2",