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template: overrides/main.html
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# Setting up versioning

Material for MkDocs makes it easy to deploy multiple versions of your project
documentation by integrating with external utilities that add those capabilities
to MkDocs, i.e. [mike][1]. When deploying a new version, older versions of your
documentation remain untouched.

  [1]: https://github.com/jimporter/mike

## Configuration

### Versioning

[:octicons-file-code-24: Source][2] ·
[:octicons-package-24: Utility][1]

[mike][1] makes it easy to deploy multiple versions of your project
documentation. It integrates natively with Material for MkDocs and can be
enabled via `mkdocs.yml`:

``` yaml
extra:
  version:
    provider: mike
```

This will render a version selector in the header next to the title of your
project:

<figure markdown>

[![Version selection][3]][3]

  <figcaption markdown>

A demo is worth a thousand words — check it out at
[squidfunk.github.io/mkdocs-material-example-versioning][4]

  </figcaption>
</figure>

!!! quote "[Why use mike?][5]"

    mike is built around the idea that once you've generated your docs for a
    particular version, you should never need to touch that version again. This
    means you never have to worry about breaking changes in MkDocs, since your
    old docs (built with an old version of MkDocs) are already generated and
    sitting in your `gh-pages` branch.

    While mike is flexible, it's optimized around putting your docs in a
    `<major>.<minor>` directory, with optional aliases (e.g. `latest` or `dev`)
    to particularly notable versions. This makes it easy to make permalinks to
    whatever version of the documentation you want to direct people to.

_Note that you don't need to run_ `mike install-extras` _as noted in the
[official documentation][6], as [mike][1] is now natively integrated with
Material for MkDocs._

  [2]: https://github.com/squidfunk/mkdocs-material/blob/master/src/partials/header.html
  [3]: ../assets/screenshots/versioning.png
  [4]: https://squidfunk.github.io/mkdocs-material-example-versioning/
  [5]: https://github.com/jimporter/mike#why-use-mike
  [6]: https://github.com/jimporter/mike#usage

### Version warning

[:octicons-heart-fill-24:{ .mdx-heart } Insiders][Insiders]{ .mdx-insiders } ·
:octicons-file-symlink-file-24: Customization ·
[:octicons-tag-24: insiders-2.5.0 ... present][Insiders]

If you're using versioning, you might want to display a warning when the user
visits any other version than the latest version. Using [theme extension][8],
you can [define the `outdated` block][9]:

``` html
{% extends "base.html" %}

{% block outdated %}
  You're not viewing the latest version.
  <a href="{{ '../' ~ base_url }}"> <!-- (1) -->
    <strong>Click here to go to latest.</strong>
  </a>
{% endblock %}
```

1. Given this value for the `href` attribute, the link will always redirect to 
   the root of your site, which will then redirect to the latest version. This
   ensures that older versions of your site do not depend on a specific alias,
   e.g. `latest`, to allow for changing the alias later on without breaking
   earlier versions.

This will render a version warning above the header:

[![Version warning][10]][10]

By default, the default version is identified by the `latest` alias. If you
wish to set another alias as the latest version, e.g. `stable`, add the
following to `mkdocs.yml`:

``` yaml
extra:
  version:
    default: stable
```

Make sure that this matches the [default version][11].

  [Insiders]: ../insiders/index.md
  [7]: ../insiders/index.md
  [8]: ../customization.md#extending-the-theme
  [9]: ../customization.md#overriding-blocks-recommended
  [10]: ../assets/screenshots/version-warning.png
  [11]: #setting-a-default-version

### Stay on page

[:octicons-heart-fill-24:{ .mdx-heart } Insiders][Insiders]{ .mdx-insiders } ·
[:octicons-tag-24: insiders-2.6.0 ... present][Insiders]

Insiders improves the user experience when switching between versions: if
version A and B contain a page with the same path name, the user will stay on
the current page:

=== "New behavior"

    ```
    docs.example.com/0.1/     -> docs.example.com/0.2/
    docs.example.com/0.1/foo/ -> docs.example.com/0.2/foo/
    docs.example.com/0.1/bar/ -> docs.example.com/0.2/bar/
    ```

=== "Old behavior"

    ```
    docs.example.com/0.1/     -> docs.example.com/0.2/
    docs.example.com/0.1/foo/ -> docs.example.com/0.2/
    docs.example.com/0.1/bar/ -> docs.example.com/0.2/
    ```

<figure markdown>
  <figcaption markdown>

A demo is worth a thousand words — check it out at
[squidfunk.github.io/mkdocs-material-example-versioning][4]

  </figcaption>
</figure>


## Usage

While this section outlines the basic workflow for publishing new versions, 
it's best to check out the [official documentation][6] to make yourself familar
with [mike][1].

### Publishing a new version

If you want to publish a new version of your project documentation, choose a
version identifier and update the alias set as the default version with:

```
mike deploy --push --update-aliases 0.1 latest
```

Note that every version will be deployed as a subdirectory of your `site_url`,
e.g.:

- _docs.example.com/0.1/_
- _docs.example.com/0.2/_
- ...

### Setting a default version

When starting with [mike][1], a good idea is to set an alias as a default
version, e.g. `latest`, and when publishing a new version, always update the
alias to point to the latest version:

```
mike set-default --push latest
```

When publishing a new version, [mike][1] will create a redirect in the root of
your project documentation to the version associated with the alias:

_docs.example.com_ :octicons-arrow-right-24: _docs.example.com/0.1_