Hacker News Reader

Are you asking how to do this in Go or how to do it in general?

Here's how the hk app does it: https://github.com/heroku/hk/blob/master/main.go#L120

Basically it reads the arguments to the executable and matches them against a built-in list of supported commands and dispatches appropriately.

View on HN

Thanks for the link to the source, I was asking in general though.

Principle is the same in any language. They all provide a way to parse the arguments passed in. You need to examine those and call the right code based on the argument name. Look for something called ARGV or similar in your language. For example:

node.js - http://nodejs.org/docs/latest/api/process.html#process_proce...

python - http://docs.python.org/2/library/sys.html

ruby - http://www.ruby-doc.org/core-2.0.0/ARGF.html#method-i-argv

You're looking for the "flag" package, in the standard library: http://golang.org/pkg/flag/

Reply on news.ycombinator.com