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---
title: Commands
permalink: /docs/plugins/commands/
---
As of version {% include docs_version_badge.html version="2.5.0"%}, Jekyll can be extended with plugins which provide
subcommands for the `jekyll` executable. This is possible by including the
relevant plugins in a `Gemfile` group called `:jekyll_plugins`:
```ruby
group :jekyll_plugins do
gem "my_fancy_jekyll_plugin"
end
```
Each `Command` must be a subclass of the `Jekyll::Command` class and must
contain one class method: `init_with_program`. An example:
```ruby
class MyNewCommand < Jekyll::Command
class << self
def init_with_program(prog)
prog.command(:new) do |c|
c.syntax "new [options]"
c.description 'Create a new Jekyll site.'
c.option 'dest', '-d DEST', 'Where the site should go.'
c.action do |args, options|
Jekyll::Site.new_site_at(options['dest'])
end
end
end
end
end
```
Commands should implement this single class method:
<div class="mobile-side-scroller">
<table>
<thead>
<tr>
<th>Method</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td>
<p><code>init_with_program</code></p>
</td>
<td><p>
This method accepts one parameter, the
<code><a href="https://github.com/jekyll/mercenary#readme">Mercenary::Program</a></code>
instance, which is the Jekyll program itself. Upon the program,
commands may be created using the above syntax. For more details,
visit the Mercenary repository on GitHub.com.
</p></td>
</tr>
</tbody>
</table>
</div>
|
