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Contents
# OptionParser
OptionParser is a class for command-line option analysis. It is much more
advanced, yet also easier to use, than GetoptLong, and is a more Ruby-oriented
solution.
## Features
1. The argument specification and the code to handle it are written in the
same place.
2. It can output an option summary; you don't need to maintain this string
separately.
3. Optional and mandatory arguments are specified very gracefully.
4. Arguments can be automatically converted to a specified class.
5. Arguments can be restricted to a certain set.
## Installation
Add this line to your application's Gemfile:
```ruby
gem 'optparse'
```
And then execute:
$ bundle install
Or install it yourself as:
$ gem install optparse
## Usage
```ruby
require 'optparse'
options = {}
OptionParser.new do |opts|
opts.banner = "Usage: example.rb [options]"
opts.on("-v", "--[no-]verbose", "Run verbosely") do |v|
options[:verbose] = v
end
end.parse!
p options
p ARGV
```
## Development
After checking out the repo, run `bin/setup` to install dependencies. Then, run `rake test` to run the tests. You can also run `bin/console` for an interactive prompt that will allow you to experiment.
To install this gem onto your local machine, run `bundle exec rake install`. To release a new version, update the version number in `version.rb`, and then run `bundle exec rake release`, which will create a git tag for the version, push git commits and tags, and push the `.gem` file to [rubygems.org](https://rubygems.org).
## Contributing
Bug reports and pull requests are welcome on GitHub at https://github.com/ruby/optparse.
Version data entries
13 entries across 13 versions & 3 rubygems