# Technical Documentation: rails/thor

> ℹ️ **Provenance:** Standard README.md · [CodeWiki Reference](https://codewiki.google/github.com/rails/thor) · Recency: Active (< 180 days)

Thor
====

[][gem]

[gem]: https://rubygems.org/gems/thor

Description
-----------
Thor is a simple and efficient tool for building self-documenting command line
utilities.  It removes the pain of parsing command line options, writing
"USAGE:" banners, and can also be used as an alternative to the [Rake][rake]
build tool.  The syntax is Rake-like, so it should be familiar to most Rake
users.

Please note: Thor, by design, is a system tool created to allow seamless file and url
access, which should not receive application user input. It relies on [open-uri][open-uri],
which, combined with application user input, would provide a command injection attack
vector.

[rake]: https://github.com/ruby/rake
[open-uri]: https://ruby-doc.org/stdlib-2.5.1/libdoc/open-uri/rdoc/index.html

Installation
------------
    gem install thor

Usage and documentation
-----------------------
Please see the [wiki][] for basic usage and other documentation on using Thor.

[wiki]: https://github.com/rails/thor/wiki

Contributing
------------
If you would like to help, please read the [CONTRIBUTING][] file for suggestions.

[contributing]: CONTRIBUTING.md

License
-------
Released under the MIT License.  See the [LICENSE][] file for further details.

[license]: LICENSE.md

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