CoffeeScript - Execute bash script with arguments

Question

I am playing around with GitHub's Hubot, and I try to execute a bash script inside my robot work.
I succeed executing my script, but cannot get it working if I add some arguments to this script.

{ spawn } = require 'child_process'
s = spawn './myScript.sh' + " url" + " title"     <------- doesn't work due to args
s = spawn './myScript.sh'                         <------- alright without args
s.stdout.on 'data', ( data ) -> console.log "Output: #{ data }"
s.stderr.on 'data', ( data ) -> console.error "Error: #{ data }"
s.on 'close', -> console.log "'s' has finished executing."

How do I pass arguments to my script ?
Thanks for help

You could say spawn "./myScript.sh #{url} #{title}" but that would leave you open to all sorts of unpleasant quoting and injection problems. Never ever use the single argument form of spawn, system, or similar "launch a shell to do things for me" commands, there's almost always a multi-argument form that bypasses the shell completely. Aurélien's answer is the right way. — mu is too short
– mu is too short, Commented Feb 17, 2014 at 14:18

Aurélien Thieriot · Accepted Answer · 2014-02-17 14:06:38Z

8

As explained in the documentation:

http://nodejs.org/api/child_process.html#child_process_child_process_spawn_command_args_options

Spawn take, as second parameter, an array made of your different arguments. It would look like this:

s = spawn './myScript.sh', [url, title]

answered Feb 17, 2014 at 14:06

Aurélien Thieriot

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