I've read through tons of variations of my question, but I can't seem to find one that really matches up with what I'm trying to do.
I have a script that essentially has two versions: the "default" would run through a series of mandatory methods, and the second version would run through those same methods, then tack on a series of secondary methods. I would like the second version to be triggered from the command line (something like $ script.rb second_version), and the "default" option to be triggered by no argument input at all (since it's going to be used more frequently, so just $ script.rb).
I tried this with ARGV:
second_version = ARGV[0]
if second_version
second_version_methods
else
main_version
end
This technically works, but the problem is that the very first method that runs in the main_version script is a method that requires user input. What ends up happening is that the string "second_version" is automatically passed to that method as the value, which I don't want.
Essentially, is there a way to have a command line argument that will only specify a condition to run in a particular way, and then once that's done, it just drops the input? I've looked into optparse but its functionality seems a bit superfluous for this purpose.
Thank you!
ARGV isn't readonly, so you could consume the first input like this:
if ARGV[0] == 'second_version'
ARGV.shift # removes the first element
second_version_methods
else
main_version
end
If you want to keep ARGV intact (which is a better idea), you can do this:
arguments = ARGV.dup
if arguments[0] == 'second_thing'
arguments.shift
# ...