Passing arguments to a ruby script

Question

I run a file like this:

ruby hello.rb world.csv data.csv

How would the start file look? I have this.

require 'daemons'

pwd  = File.dirname(File.expand_path(__FILE__))

wFile = "#{pwd}/world.csv"
dFile = "#{pwd}/data.csv" 

Daemons.run("hello.rb #{wFile} #{dFile}")

score 4 · Accepted Answer · answered Jun 28 '13 at 05:55

You must create a file hello_daemon.rb like this:

require 'daemons'

Daemons.run("hello.rb")

And run it (you can use one of start, restart or run):

ruby hello_daemon.rb start -- world.csv data.csv

And daemons will run your hello.rb as

ruby hello.rb world.csv data.csv

score 2 · Answer 2 · answered Feb 24 '12 at 22:29

2

Use global constant ARGV (although there's not much to learn) to receive an array of strings with the parameters.
So for your case:

require 'daemons'

files = []
ARGV.each do |arg|
  files << File.expand_path(arg)
end

This should give you absolute paths to every argument, so that you can open them from anywhere.

answered Feb 24 '12 at 22:29

farnoy

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I think you might be misunderstanding me. In hello.rb I have it set to accept the arguments as ARGV[0] and ARGV[1] but it Daemons doesn't pass it correctly. – sunnyrjuneja Feb 28 '12 at 04:17
1

`ARGV[0]` is probably the name of the current file – farnoy Feb 28 '12 at 05:34
Likely, he misunderstood your question. – Jiemurat Jun 28 '13 at 05:56

Passing arguments to a ruby script

2 Answers2