# Wiki formatting (Markdown)

## Links

### Redmine links

Redmine allows hyperlinking between resources (issues, changesets, wiki pages...) from anywhere wiki formatting is used.

- Link to an issue: #124 (displays #124, link is striked-through if the issue is closed)
- Link to an issue including tracker name and subject: ##124 (displays Bug #124: bulk edit doesn't change the category or fixed version properties)
- Link to an issue note: #124-6, or #124#note-6

Wiki links:

- [[Guide]] displays a link to the page named 'Guide': Guide
- [[Guide#further-reading]] takes you to the anchor "further-reading". Headings get automatically assigned anchors so that you can refer to them: Guide
- [[#further-reading]] link to the anchor "further-reading" of the current page: #further-reading
- [[Guide|User manual]] displays a link to the same page but with a different text: User manual

You can also link to pages of an other project wiki:

- [[sandbox:some page]] displays a link to the page named 'Some page' of the Sandbox wiki
- [[sandbox:]] displays a link to the Sandbox wiki main page

Wiki links are displayed in red if the page doesn't exist yet, eg: Nonexistent page.

Links to other resources:

- Documents:
  - document#17 (link to document with id 17)
  - document:Greetings (link to the document with title "Greetings")
  - document:"Some document" (double quotes can be used when document title contains spaces)
  - sandbox:document:"Some document" (link to a document with title "Some document" in other project "sandbox")

- Versions:
  - version#3 (link to version with id 3)
  - version:1.0.0 (link to version named "1.0.0")
  - version:"1.0 beta 2"
  - sandbox:version:1.0.0 (link to version "1.0.0" in the project "sandbox")

- Attachments:
  - attachment:file.zip (link to the attachment of the current object named file.zip)
  - For now, attachments of the current object can be referenced only (if you're on an issue, it's possible to reference attachments of this issue only)

- Changesets:
  - r758 (link to a changeset)
  - commit:c6f4d0fd (link to a changeset with a non-numeric hash)
  - svn1|r758 (link to a changeset of a specific repository, for projects with multiple repositories)
  - commit:hg|c6f4d0fd (link to a changeset with a non-numeric hash of a specific repository)
  - sandbox:r758 (link to a changeset of another project)
  - sandbox:commit:c6f4d0fd (link to a changeset with a non-numeric hash of another project)

- Repository files:
  - source:some/file (link to the file located at /some/file in the project's repository)
  - source:some/file@52 (link to the file's revision 52)
  - source:some/file#L120 (link to line 120 of the file)
  - source:some/file@52#L120 (link to line 120 of the file's revision 52)
  - source:"some file@52#L120" (use double quotes when the URL contains spaces
  - export:some/file (force the download of the file)
  - source:svn1|some/file (link to a file of a specific repository, for projects with multiple repositories)
  - sandbox:source:some/file (link to the file located at /some/file in the repository of the project "sandbox")
  - sandbox:export:some/file (force the download of the file)

- Forums:
  - forum#1 (link to forum with id 1
  - forum:Support (link to forum named Support)
  - forum:"Technical Support" (use double quotes if forum name contains spaces)

- Forum messages:
  - message#1218 (link to message with id 1218)

- Projects:
  - project#3 (link to project with id 3)
  - project:some-project (link to project with name or slug of "some-project")
  - project:"Some Project" (use double quotes for project name containing spaces)

- News:
  - news#2 (link to news item with id 2)
  - news:Greetings (link to news item named "Greetings")
  - news:"First Release" (use double quotes if news item name contains spaces)

- Users:
  - user#2 (link to user with id 2)
  - user:jsmith (Link to user with login jsmith)
  - @jsmith (Link to user with login jsmith)

Escaping:

- You can prevent Redmine links from being parsed by preceding them with an exclamation mark: !

### External links

URLs (starting with: www, http, https, ftp, ftps, sftp and sftps) and email addresses are automatically turned into clickable links:

    http://www.redmine.org, someone@foo.bar

displays: http://www.redmine.org, someone@foo.bar

If you want to display a specific text instead of the URL, you can use the standard markdown syntax:

    [Redmine web site](http://www.redmine.org)

displays: Redmine web site

## Text formatting

For things such as headlines, bold, tables, lists, Redmine supports Markdown syntax. See http://daringfireball.net/projects/markdown/syntax for information on using any of these features. A few samples are included below, but the engine is capable of much more of that.

### Font style

    * **bold**
    * *Italic*
    * ***bold italic***
    * _underline_
    * ~~strike-through~~

Display:

- bold
- italic
- bold italic
- strike-through

### Inline images

- ![](image_url) displays an image located at image_url (markdown syntax)
- If you have an image attached to your wiki page, it can be displayed inline using its filename: ![](attached_image)

### Headings

    # Heading
    ## Subheading
    ### Subsubheading

Redmine assigns an anchor to each of those headings thus you can link to them with "#Heading", "#Subheading" and so forth.

### Blockquotes

Start the paragraph with >

    > Rails is a full-stack framework for developing database-backed web applications according to the Model-View-Control pattern.
    To go live, all you need to add is a database and a web server.

Display:

> Rails is a full-stack framework for developing database-backed web applications according to the Model-View-Control pattern.
> To go live, all you need to add is a database and a web server.

### Table of content

    {{toc}} => left aligned toc
    {{>toc}} => right aligned toc

### Horizontal Rule

    ---

## Macros

Redmine has the following builtin macros:

`hello_world`

  Sample macro.

`macro_list`

  Displays a list of all available macros, including description if available.

`child_pages`

  Displays a list of child pages. With no argument, it displays the child pages of the current wiki page. Examples:

      {{child_pages}} -- can be used from a wiki page only
      {{child_pages(depth=2)}} -- display 2 levels nesting only

`include`

  Include a wiki page. Example:

      {{include(Foo)}}

  or to include a page of a specific project wiki:

      {{include(projectname:Foo)}}

`collapse`

  Inserts of collapsed block of text. Example:

      {{collapse(View details...)
      This is a block of text that is collapsed by default.
      It can be expanded by clicking a link.
      }}

`thumbnail`

  Displays a clickable thumbnail of an attached image. Examples:

      {{thumbnail(image.png)}}
      {{thumbnail(image.png, size=300, title=Thumbnail)}}

## Code highlighting

Default code highlightment relies on Rouge, a syntax highlighting library written in pure Ruby. It supports many commonly used languages such as c, cpp (c++), csharp (c#, cs), css, diff (patch, udiff), go (golang), groovy, html, java, javascript (js), kotlin, objective_c (objc), perl (pl), php, python (py), r, ruby (rb), sass, scala, shell (bash, zsh, ksh, sh), sql, swift, xml and yaml (yml) languages, where the names inside parentheses are aliases. Please refer to https://www.redmine.org/projects/redmine/wiki/RedmineCodeHighlightingLanguages for the full list of supported languages.

You can highlight code at any place that supports wiki formatting using this syntax (note that the language name or alias is case-insensitive):

    ``` ruby
      Place your code here.
    ```

Example:

    # The Greeter class
    class Greeter
      def initialize(name)
        @name = name.capitalize
      end

      def salute
        puts "Hello #{@name}!"
      end
    end