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Provide response for zero/unmatched/invalid args #102

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merged 1 commit into from
Jan 10, 2019
Merged

Provide response for zero/unmatched/invalid args #102

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17 changes: 17 additions & 0 deletions bin/cmd.js
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Original file line number Diff line number Diff line change
Expand Up @@ -58,4 +58,21 @@ program
});
});

// error on unknown commands
// ref: https://github.com/tj/commander.js#custom-event-listeners
program
.on('command:*', function () {
console.error('Invalid command: %s\nSee --help for a list of available commands.', program.args.join(' '));
process.exit(1);
});

program.parse(process.argv);

// check if no command line args are provided
// ref: https://github.com/tj/commander.js/issues/7#issuecomment-32448653
var NO_COMMAND_SPECIFIED = program.args.length === 0;

if (NO_COMMAND_SPECIFIED) {
// user did not supply args, so show --help
program.help();
}