Not all of the GitLab-specific extensions to Markdown that are described in
this document currently work on our documentation website.
>
For the best result, we encourage you to check this document out as rendered
by GitLab: [markdown.md]
_GitLab uses the [Redcarpet Ruby library][redcarpet] for Markdown processing._
GitLab uses "GitLab Flavored Markdown" (GFM). It extends the 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/).
You can use GFM in the following areas:
- comments
- issues
- merge requests
- milestones
- snippets (the snippet must be named with a `.md` extension)
- wiki pages
- markdown documents inside the repository
You can also use other rich text files in GitLab. You might have to install a
dependency to do so. Please see the [github-markup gem readme](https://github.com/gitlabhq/markup#markups) for more information.
It is not reasonable to italicize just _part_ of a word, especially when you're dealing with code and names that often appear with multiple underscores. Therefore, GFM ignores multiple underscores in words:
Sometimes you want to :monkey: around a bit and add some :star2: to your :speech_balloon:. Well we have a gift for you:
:zap: You can use emoji anywhere GFM is supported. :v:
You can use it to point out a :bug: or warn about :speak_no_evil: patches. And if someone improves your really :snail: code, send them some :birthday:. People will :heart: you for that.
If you are new to this, don't be :fearful:. You can easily join the emoji :family:. All you need to do is to look up on the supported codes.
Consult the [Emoji Cheat Sheet](http://emoji.codes) for a list of all supported emoji codes. :thumbsup:
Sometimes you want to :monkey: around a bit and add some :star2: to your :speech_balloon:. Well we have a gift for you:
:zap: You can use emoji anywhere GFM is supported. :v:
You can use it to point out a :bug: or warn about :speak_no_evil: patches. And if someone improves your really :snail: code, send them some :birthday:. People will :heart: you for that.
If you are new to this, don't be :fearful:. You can easily join the emoji :family:. All you need to do is to look up on the supported codes.
Consult the [Emoji Cheat Sheet](http://emoji.codes) for a list of all supported emoji codes. :thumbsup:
## Special GitLab References
GFM recognizes special references.
You can easily reference e.g. an issue, a commit, a team member or even the whole team within a project.
GFM will turn that reference into a link so you can navigate between them easily.
You can add task lists to issues, merge requests and comments. To create a task list, add a specially-formatted Markdown list, like so:
```no-highlight
- [x] Completed task
- [ ] Incomplete task
- [ ] Sub-task 1
- [x] Sub-task 2
- [ ] Sub-task 3
```
- [x] Completed task
- [ ] Incomplete task
- [ ] Sub-task 1
- [x] Sub-task 2
- [ ] Sub-task 3
Task lists can only be created in descriptions, not in titles. Task item state can be managed by editing the description's Markdown or by toggling the rendered check boxes.
Relative links do not allow referencing project files in a wiki page or wiki page in a project file. The reason for this is that, in GitLab, wiki is always a separate git repository. For example:
`[I'm a reference-style link](style)`
will point the link to `wikis/style` when the link is inside of a wiki markdown file.
## Images
Here's our logo (hover to see the title text):
Inline-style:
Reference-style:
![alt text1][logo]
[logo]: img/markdown_logo.png
Here's our logo:
Inline-style:
Reference-style:
![alt text][logo]
[logo]: img/markdown_logo.png
## Blockquotes
```no-highlight
> Blockquotes are very handy in email to emulate reply text.
> This line is part of the same quote.
Quote break.
> This is a very long line that will still be quoted properly when it wraps. Oh boy let's keep writing to make sure this is long enough to actually wrap for everyone. Oh, you can *put* **Markdown** into a blockquote.
```
> Blockquotes are very handy in email to emulate reply text.
> This line is part of the same quote.
Quote break.
> This is a very long line that will still be quoted properly when it wraps. Oh boy let's keep writing to make sure this is long enough to actually wrap for everyone. Oh, you can *put* **Markdown** into a blockquote.
## Inline HTML
You can also use raw HTML in your Markdown, and it'll mostly work pretty well.
See the documentation for HTML::Pipeline's [SanitizationFilter](http://www.rubydoc.info/gems/html-pipeline/HTML/Pipeline/SanitizationFilter#WHITELIST-constant) class for the list of allowed HTML tags and attributes. In addition to the default `SanitizationFilter` whitelist, GitLab allows `span` elements.
```no-highlight
<dl>
<dt>Definition list</dt>
<dd>Is something people use sometimes.</dd>
<dt>Markdown in HTML</dt>
<dd>Does *not* work **very** well. Use HTML <em>tags</em>.</dd>
</dl>
```
<dl>
<dt>Definition list</dt>
<dd>Is something people use sometimes.</dd>
<dt>Markdown in HTML</dt>
<dd>Does *not* work **very** well. Use HTML <em>tags</em>.</dd>
</dl>
## Horizontal Rule
```
Three or more...
---
Hyphens
***
Asterisks
___
Underscores
```
Three or more...
---
Hyphens
***
Asterisks
___
Underscores
## Line Breaks
My basic recommendation for learning how line breaks work is to experiment and discover -- hit <Enter> once (i.e., insert one newline), then hit it twice (i.e., insert two newlines), see what happens. You'll soon learn to get what you want. "Markdown Toggle" is your friend.
Here are some things to try out:
```
Here's a line for us to start with.
This line is separated from the one above by two newlines, so it will be a *separate paragraph*.
This line is also a separate paragraph, but...
This line is only separated by a single newline, so it's a separate line in the *same paragraph*.
This line is also a separate paragraph, and...
This line is on its own line, because the previous line ends with two
spaces.
```
Here's a line for us to start with.
This line is separated from the one above by two newlines, so it will be a *separate paragraph*.
This line is also begins a separate paragraph, but...
This line is only separated by a single newline, so it's a separate line in the *same paragraph*.
This line is also a separate paragraph, and...
This line is on its own line, because the previous line ends with two
spaces.
## Tables
Tables aren't part of the core Markdown spec, but they are part of GFM and Markdown Here supports them.
```
| header 1 | header 2 |
| -------- | -------- |
| cell 1 | cell 2 |
| cell 3 | cell 4 |
```
Code above produces next output:
| header 1 | header 2 |
| -------- | -------- |
| cell 1 | cell 2 |
| cell 3 | cell 4 |
**Note**
The row of dashes between the table header and body must have at least three dashes in each column.
By including colons in the header row, you can align the text within that column:
```
| Left Aligned | Centered | Right Aligned | Left Aligned | Centered | Right Aligned |
The following examples show how links inside wikis behave.
### Wiki - Direct page link
A link which just includes the slug for a page will point to that page,
_at the base level of the wiki_.
This snippet would link to a `documentation` page at the root of your wiki:
```markdown
[Link to Documentation](documentation)
```
### Wiki - Direct file link
Links with a file extension point to that file, _relative to the current page_.
If this snippet was placed on a page at `<your_wiki>/documentation/related`,
it would link to `<your_wiki>/documentation/file.md`:
```markdown
[Link to File](file.md)
```
### Wiki - Hierarchical link
A link can be constructed relative to the current wiki page using `./<page>`,
`../<page>`, etc.
- If this snippet was placed on a page at `<your_wiki>/documentation/main`,
it would link to `<your_wiki>/documentation/related`:
```markdown
[Link to Related Page](./related)
```
- If this snippet was placed on a page at `<your_wiki>/documentation/related/content`,
it would link to `<your_wiki>/documentation/main`:
```markdown
[Link to Related Page](../main)
```
- If this snippet was placed on a page at `<your_wiki>/documentation/main`,
it would link to `<your_wiki>/documentation/related.md`:
```markdown
[Link to Related Page](./related.md)
```
- If this snippet was placed on a page at `<your_wiki>/documentation/related/content`,
it would link to `<your_wiki>/documentation/main.md`:
```markdown
[Link to Related Page](../main.md)
```
### Wiki - Root link
A link starting with a `/` is relative to the wiki root.
- This snippet links to `<wiki_root>/documentation`:
```markdown
[Link to Related Page](/documentation)
```
- This snippet links to `<wiki_root>/miscellaneous.md`:
```markdown
[Link to Related Page](/miscellaneous.md)
```
## References
- This document leveraged heavily from the [Markdown-Cheatsheet](https://github.com/adam-p/markdown-here/wiki/Markdown-Cheatsheet).
- The [Markdown Syntax Guide](https://daringfireball.net/projects/markdown/syntax) at Daring Fireball is an excellent resource for a detailed explanation of standard markdown.
- [Dillinger.io](http://dillinger.io) is a handy tool for testing standard markdown.
