Commit 662e55d7 authored by Evan Read's avatar Evan Read

Merge branch 'docs/frontmatter-delimiters' into 'master'

Add docs for frontmatter delimiters

See merge request gitlab-org/gitlab-ce!23876
parents 95d4e979 91192264
...@@ -5,11 +5,11 @@ It is not valid for the [GitLab documentation website](https://docs.gitlab.com) ...@@ -5,11 +5,11 @@ It is not valid for the [GitLab documentation website](https://docs.gitlab.com)
nor [GitLab's main website](https://about.gitlab.com), as they both use nor [GitLab's main website](https://about.gitlab.com), as they both use
[Kramdown](https://kramdown.gettalong.org) as their markdown engine. [Kramdown](https://kramdown.gettalong.org) as their markdown engine.
The documentation website uses an extended Kramdown gem, [GitLab Kramdown](https://gitlab.com/gitlab-org/gitlab_kramdown). The documentation website uses an extended Kramdown gem, [GitLab Kramdown](https://gitlab.com/gitlab-org/gitlab_kramdown).
Consult the [GitLab Kramdown Guide](https://about.gitlab.com/handbook/product/technical-writing/markdown-guide/) for a complete Kramdown reference._ Consult the [GitLab Kramdown Guide](https://about.gitlab.com/handbook/product/technical-writing/markdown-guide/) for a complete Kramdown reference.
## GitLab Flavored Markdown (GFM) ## GitLab Flavored Markdown (GFM)
GitLab uses "GitLab Flavored Markdown" (GFM). It extends the [CommonMark specification][commonmark-spec] (which is based on standard Markdown) in a few significant ways to add some useful functionality. It was inspired by [GitHub Flavored Markdown](https://help.github.com/articles/basic-writing-and-formatting-syntax/). GitLab uses "GitLab Flavored Markdown" (GFM). It extends the [CommonMark specification][commonmark-spec] (which is based on standard Markdown) in a few significant ways to add additional useful functionality. It was inspired by [GitHub Flavored Markdown](https://help.github.com/articles/basic-writing-and-formatting-syntax/).
You can use GFM in the following areas: You can use GFM in the following areas:
...@@ -26,8 +26,7 @@ dependency to do so. Please see the [`github-markup` gem readme](https://github. ...@@ -26,8 +26,7 @@ dependency to do so. Please see the [`github-markup` gem readme](https://github.
> **Notes:** > **Notes:**
> >
> For the best result, we encourage you to check this document out as [rendered > We encourage you to view this document as [rendered by GitLab itself](markdown.md).
> by GitLab itself](markdown.md).
> >
> As of 11.1, GitLab uses the [CommonMark Ruby Library][commonmarker] for Markdown > As of 11.1, GitLab uses the [CommonMark Ruby Library][commonmarker] for Markdown
processing of all new issues, merge requests, comments, and other Markdown content processing of all new issues, merge requests, comments, and other Markdown content
...@@ -142,7 +141,7 @@ GFM will autolink almost any URL you copy and paste into your text: ...@@ -142,7 +141,7 @@ GFM will autolink almost any URL you copy and paste into your text:
* <a href="irc://irc.freenode.net/gitlab">irc://irc.freenode.net/gitlab</a> * <a href="irc://irc.freenode.net/gitlab">irc://irc.freenode.net/gitlab</a>
* http://localhost:3000 * http://localhost:3000
### Multiline Blockquote ### Multiline blockquote
> If this is not rendered correctly, see > If this is not rendered correctly, see
https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/user/markdown.md#multiline-blockquote https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/user/markdown.md#multiline-blockquote
...@@ -172,7 +171,7 @@ you can quote that without having to manually prepend `>` to every line! ...@@ -172,7 +171,7 @@ you can quote that without having to manually prepend `>` to every line!
<p>you can quote that without having to manually prepend <code>&gt;</code> to every line!</p> <p>you can quote that without having to manually prepend <code>&gt;</code> to every line!</p>
</blockquote> </blockquote>
### Code and Syntax Highlighting ### Code and syntax highlighting
> If this is not rendered correctly, see > If this is not rendered correctly, see
https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/user/markdown.md#code-and-syntax-highlighting https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/user/markdown.md#code-and-syntax-highlighting
...@@ -242,7 +241,7 @@ s = "There is no highlighting for this." ...@@ -242,7 +241,7 @@ s = "There is no highlighting for this."
But let's throw in a <b>tag</b>. But let's throw in a <b>tag</b>.
``` ```
### Inline Diff ### Inline diff
> If this is not rendered correctly, see > If this is not rendered correctly, see
https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/user/markdown.md#inline-diff https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/user/markdown.md#inline-diff
...@@ -309,7 +308,7 @@ On Linux, you can download [Noto Color Emoji](https://www.google.com/get/noto/he ...@@ -309,7 +308,7 @@ On Linux, you can download [Noto Color Emoji](https://www.google.com/get/noto/he
Ubuntu 18.04 (like many modern Linux distros) has this font installed by default. Ubuntu 18.04 (like many modern Linux distros) has this font installed by default.
### Special GitLab References ### Special GitLab references
GFM recognizes special references. GFM recognizes special references.
...@@ -363,7 +362,7 @@ It also has a shorthand version to reference other projects from the same namesp ...@@ -363,7 +362,7 @@ It also has a shorthand version to reference other projects from the same namesp
| `project@9ba12248...b19a04f5` | commit range comparison | | `project@9ba12248...b19a04f5` | commit range comparison |
| `project~"Some label"` | issues with given label | | `project~"Some label"` | issues with given label |
### Task Lists ### Task lists
> If this is not rendered correctly, see > If this is not rendered correctly, see
https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/user/markdown.md#task-lists https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/user/markdown.md#task-lists
...@@ -505,6 +504,66 @@ Becomes: ...@@ -505,6 +504,66 @@ Becomes:
For details see the [Mermaid official page][mermaid]. For details see the [Mermaid official page][mermaid].
### Front matter
> [Introduced](https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/23331)
in GitLab 11.6.
Front matter is metadata included at the beginning of a markdown document, preceding
its content. This data can be used by static site generators such as [Jekyll](https://jekyllrb.com/docs/front-matter/) and [Hugo](https://gohugo.io/content-management/front-matter/),
and many other applications.
In GitLab, front matter is only used in Markdown files and wiki pages, not the other places where Markdown formatting is supported.
When you view a Markdown file rendered by GitLab, any front matter is displayed as-is, in a box at the top of the document, before the rendered HTML content.
To view an example, you can toggle between the source and rendered version of a [GitLab documentation file](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/README.md).
The following delimeters are supported:
- YAML (`---`):
```
---
title: About Front Matter
example:
language: yaml
---
```
- TOML (`+++`):
```
+++
title = "About Front Matter"
[example]
language = "toml"
+++
```
- JSON (`;;;`):
```
;;;
{
"title": "About Front Matter"
"example": {
"language": "json"
}
}
;;;
```
Other languages are supported by adding a specifier to any of the existing
delimiters. For example:
```
---php
$title = "About Front Matter";
$example = array(
'language' => "php",
);
---
```
## Standard Markdown ## Standard Markdown
### Headers ### Headers
......
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