# AsciiDoc GitLab uses the [Asciidoctor](https://asciidoctor.org) gem to convert AsciiDoc content to HTML5. Consult the [Asciidoctor User Manual](https://asciidoctor.org/docs/user-manual/) for a complete Asciidoctor reference. ## Syntax Here's a brief reference of the most commonly used AsciiDoc syntax. You can find the full documentation for the AsciiDoc syntax at . ### Paragraphs ```asciidoc A normal paragraph. Line breaks are not preserved. ``` Line comments, which are lines that start with `//`, are skipped: ``` // this is a comment ``` A blank line separates paragraphs. A paragraph with the `[%hardbreaks]` option will preserve line breaks: ```asciidoc [%hardbreaks] This paragraph carries the `hardbreaks` option. Notice how line breaks are now preserved. ``` An indented (literal) paragraph disables text formatting, preserves spaces and line breaks, and is displayed in a monospaced font: ```asciidoc This literal paragraph is indented with one space. As a consequence, *text formatting*, spaces, and lines breaks will be preserved. ``` An admonition paragraph grabs the reader's attention: ```asciidoc NOTE: This is a brief reference, please read the full documentation at https://asciidoctor.org/docs/. TIP: Lists can be indented. Leading whitespace is not significant. ``` ### Text Formatting **Constrained (applied at word boundaries)** ```asciidoc *strong importance* (aka bold) _stress emphasis_ (aka italic) `monospaced` (aka typewriter text) "`double`" and '`single`' typographic quotes +passthrough text+ (substitutions disabled) `+literal text+` (monospaced with substitutions disabled) ``` **Unconstrained (applied anywhere)** ```asciidoc **C**reate+**R**ead+**U**pdate+**D**elete fan__freakin__tastic ``mono``culture ``` **Replacements** ```asciidoc A long time ago in a galaxy far, far away... (C) 1976 Arty Artisan I believe I shall--no, actually I won't. ``` **Macros** ```asciidoc // where c=specialchars, q=quotes, a=attributes, r=replacements, m=macros, p=post_replacements, etc. The European icon:flag[role=blue] is blue & contains pass:[************] arranged in a icon:circle-o[role=yellow]. The pass:c[->] operator is often referred to as the stabby lambda. Since `pass:[++]` has strong priority in AsciiDoc, you can rewrite pass:c,a,r[C++ => C{pp}]. // activate stem support by adding `:stem:` to the document header stem:[sqrt(4) = 2] ``` ### Attributes ```asciidoc // define attributes in the document header :name: value ``` ```asciidoc :url-gem: https://rubygems.org/gems/asciidoctor You can download and install Asciidoctor {asciidoctor-version} from {url-gem}. C{pp} is not required, only Ruby. Use a leading backslash to output a word enclosed in curly braces, like \{name}. ``` ### Links ```asciidoc https://example.org/page[A webpage] link:../path/to/file.txt[A local file] xref:document.adoc[A sibling document] mailto:hello@example.org[Email to say hello!] ``` ### Anchors ```asciidoc [[idname,reference text]] // or written using normal block attributes as `[#idname,reftext=reference text]` A paragraph (or any block) with an anchor (aka ID) and reftext. See <> or <>. xref:document.adoc#idname[Jumps to anchor in another document]. This paragraph has a footnote.footnote:[This is the text of the footnote.] ``` ### Lists #### Unordered ```asciidoc * level 1 ** level 2 *** level 3 **** level 4 ***** etc. * back at level 1 + Attach a block or paragraph to a list item using a list continuation (which you can enclose in an open block). .Some Authors [circle] - Edgar Allen Poe - Sheri S. Tepper - Bill Bryson ``` #### Ordered ```asciidoc . Step 1 . Step 2 .. Step 2a .. Step 2b . Step 3 .Remember your Roman numerals? [upperroman] . is one . is two . is three ``` #### Checklist ```asciidoc * [x] checked * [ ] not checked ``` #### Callout ```asciidoc // enable callout bubbles by adding `:icons: font` to the document header [,ruby] ---- puts 'Hello, World!' # <1> ---- <1> Prints `Hello, World!` to the console. ``` #### Description ```asciidoc first term:: description of first term second term:: description of second term ``` ### Document Structure #### Header ```asciidoc = Document Title Author Name v1.0, 2019-01-01 ``` #### Sections ```asciidoc = Document Title (Level 0) == Level 1 === Level 2 ==== Level 3 ===== Level 4 ====== Level 5 == Back at Level 1 ``` #### Includes ```asciidoc include::basics.adoc[] // define -a allow-uri-read to allow content to be read from URI include::https://example.org/installation.adoc[] ``` To guarantee good system performance and prevent malicious documents causing problems, GitLab enforces a **maximum limit** on the number of include directives processed in any one document. Currently a total of 32 documents can be included, a number that is inclusive of transitive dependencies. ### Blocks ```asciidoc -- open - a general-purpose content wrapper; useful for enclosing content to attach to a list item -- ``` ```asciidoc // recognized types include CAUTION, IMPORTANT, NOTE, TIP, and WARNING // enable admonition icons by setting `:icons: font` in the document header [NOTE] ==== admonition - a notice for the reader, ranging in severity from a tip to an alert ==== ``` ```asciidoc ==== example - a demonstration of the concept being documented ==== ``` ```asciidoc .Toggle Me [%collapsible] ==== collapsible - these details are revealed by clicking the title ==== ``` ```asciidoc **** sidebar - auxiliary content that can be read independently of the main content **** ``` ```asciidoc .... literal - an exhibit that features program output .... ``` ```asciidoc ---- listing - an exhibit that features program input, source code, or the contents of a file ---- ``` ```asciidoc [,language] ---- source - a listing that is embellished with (colorized) syntax highlighting ---- ``` ~~~asciidoc \```language fenced code - a shorthand syntax for the source block \``` ~~~ ```asciidoc [,attribution,citetitle] ____ quote - a quotation or excerpt; attribution with title of source are optional ____ ``` ```asciidoc [verse,attribution,citetitle] ____ verse - a literary excerpt, often a poem; attribution with title of source are optional ____ ``` ```asciidoc ++++ pass - content passed directly to the output document; often raw HTML ++++ ``` ```asciidoc // activate stem support by adding `:stem:` to the document header [stem] ++++ x = y^2 ++++ ``` ```asciidoc //// comment - content which is not included in the output document //// ``` ### Tables ```asciidoc .Table Attributes [cols=>1h;2d,width=50%,frame=topbot] |=== | Attribute Name | Values | options | header,footer,autowidth | cols | colspec[;colspec;...] | grid | all \| cols \| rows \| none | frame | all \| sides \| topbot \| none | stripes | all \| even \| odd \| none | width | (0%..100%) | format | psv {vbar} csv {vbar} dsv |=== ``` ### Multimedia ```asciidoc image::screenshot.png[block image,800,450] Press image:reload.svg[reload,16,opts=interactive] to reload the page. video::movie.mp4[width=640,start=60,end=140,options=autoplay] video::aHjpOzsQ9YI[youtube] video::300817511[vimeo] ``` ### Breaks ```asciidoc // thematic break (aka horizontal rule) --- ``` ```asciidoc // page break <<< ```