unixsuperhero / mkclicmd.rb

CLI Test

Basically, I have my own, personal concept of what the idea cli cmd is and how it is designed. That is what this project is about. I have written several variations of this over the years, but eventually I'll make an overhaul of a change and get too lazy to revert back to what it was like before.

Basic Design and Flow

• Build the high-level command.
• Require the ruby lib into ruby file that will be running
• Include the Lib into the class or module with the code for the comman

Actual Lib's Flow

• Process arguments
  • Store a frozen version of the original ARGV
  • Store a version of ARGV we will use and modify
  • Check to see if we've been piped any data, if so:
    • dupe the original ARGV (argv_clone = ARGV.clone)
    • temporarily clear out the original ARGV (ARGV.clear)
    • read the data piped in (piped_data = ARGF.read)
    • reset ARGV args (ARGV.concat(argv_clone))
  • shift the subcommand off of the args list
  • look for the handler that processes the given subcommand (normally is a part of the current file)
    • sometimes it will be in an separate file following a certain naming convention. the format, is "[main-cmd][hyphen][subcommand]".
    • For example, if our main command is video and we want to convert a video file from HD to SD so it will run smoother on older machines. So the filename would be: video-sd to run an command that looks like: #> video sd some-hd-file.mkv

I HAVE NO IDEA WHAT THIS IS OR WHY IT IS HERE

require "dry/cli"

module Foo

module Commands

extend Dry::CLI::Registry

class Hello < Dry::CLI::Command

def call(*)

puts "hello"

end

end

register "hello", Hello

before "hello", -> { puts "I'm about to say.." }

end

end