cmds.cr

Yet another CLI Builder library for Crystal (0.26.1).

features

• Simple and readable syntax for command and task
• Automatic generation of command candidates
• Automatic generation of task candidates
• Around filter to commands

Usage

hello world

Writing logics into run method provides a command.

Cmds.command "hello" do
  def run
    puts "Hello world!"
  end
end

Cmds.run(ARGV)

$ prog hello
Hello world!

with args

• args[0] is automatically saved as task_name
• args[1..-1] can be used as args

with tasks

Writing logics as task provides sub commands.

Cmds.command "json" do
  usage "pretty file.json"

  task "pretty" do
    path = args.shift? || abort "specify file"
    puts Pretty.json(File.read(path))
  end
end

Cmds.run(ARGV)

$ prog
Error: unknown command: ''
Possible commands are: ["json"]

$ prog json
Error: unknown task: ''
Possible tasks are: ["pretty"]
  prog json pretty file.json

$ prog json pretty
specify file

around filter

before and after methods will be automatically fired. See examples/hello.cr.

Installation

Add this to your application's shard.yml:

dependencies:
  cmds:
    github: maiha/cmds.cr
    version: 0.3.2

require "cmds"

Development

make test

Contributing

1. Fork it (https://github.com/maiha/cmds.cr/fork)
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request

Contributors

• maiha maiha - creator, maintainer