bytesparadise / Libasciidoc
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= Libasciidoc
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Libasciidoc is an open source Go library to convert from Asciidoc to HTML.
== Supported syntax
Although it does not support the full Asciidoc/Asciidoctor syntax, Libasciidoc already provides users with the following features:
- Title and Sections level 1 to 6
- Document authors and revision
- Attribute declaration and substitution
- Paragraphs and admonition paragraphs
- Delimited Blocks (fenced blocks, listing blocks, example blocks, comment blocks, quoted blocks, sidebar blocks, verse blocks)
- Source code highlighting of delimited blocks (use either
chroma
orpygments
as thesource-highlighter
) - Literal blocks (paragraph starting with a space, with the
+++....+++
delimiter or with the[literal]
attribute) - Quoted text (bold, italic, monospace, marked, superscript and subscript) and substitution prevention using the backslash (
\
) character - Single and double quoted typographic quotes (e.g. '
single
' and "double
") - Explicit and implicit curved apostrophe
- Copyright (C), Registered (R), and Trademark (TM) symbols
- Passthrough (wrapping with a single plus or a triple plus, or using the
+++pass:[]+++
or+++pass:q[]+++
macros) - External links in paragraphs (
https://
,http://
,ftp://
,irc://
,mailto:
) - Inline images in paragraphs (
image:
) - Image blocks (
image::
) - Icons including font, graphic icons, both in admonition blocks and inline (
icon:
) - Element attributes (
ID
,link
,title
,role
, etc.) including short-hand ([#id.role1.role2]
) - Ordered lists including custom numbering types (
arabic
,upperroman
,lowergreek
, and so forth) - Unordered lists including bullet styles
- Labeled lists, including
[horizontal]
and[qanda]
styles - Nesting of links of different types & attributes
- Tables (basic support: header line and cells on multiple lines, top-level table styles)
- Horizontal rules (thematic breaks) and page breaks
- Table of contents
- YAML front-matter
See also the link:LIMITATIONS.adoc[known limitations] page for differences between Asciidoc/Asciidoctor and Libasciidoc.
Further elements will be supported in the future. Feel free to open issues https://github.com/bytesparadise/libasciidoc/issues[here] to help prioritizing the upcoming work.
== Output Formats (backend)
Using -b
(or --backend
) the following formats are supported:
-
html5
(alsohtml
), this is the default -
xhtml5
(alsoxhtml
)
== Installation
This is a standard Go package, and it installs like you might expect.
To install it in your $GOPATH
(assuming $GOPATH/bin
is on your path), just use go install
:
$ go get -u github.com/bytesparadise/libasciidoc
== Usage
=== Command Line
The libasciidoc library includes a minimalist command line interface to generate the HTML content from a given file:
$ libasciidoc -s content.adoc
use libasciidoc --help
to check all available options.
=== Code integration
Libasciidoc provides 2 functions to convert an Asciidoc content into HTML:
-
Converting an
io.Reader
into an HTML document:Convert(r io.Reader, output io.Writer, config configuration.Configuration) (types.Metadata, error)
-
Converting a file (given its name) into an HTML document:
ConvertFile(output io.Writer, config configuration.Configuration) (types.Metadata, error)
where the returned types.Metadata
object contains the document's title which is not part of the generated HTML <body>
part, as well as the other attributes of the source document.
All options/settings are passed via the config
parameter.
=== Macro definition
The user can define a macro by calling renderer.WithMacroTemplate()
and passing return value to conversion functions.
renderer.WithMacroTemplate()
defines a macro by the given name and associates the given template. The template is an implementation of renderer.MacroTemplate
interface (ex. text.Template
)
Libasciidoc calls Execute()
method and passes types.UserMacro
object to template when rendering.
An example the following:
var tmplStr = `<span>Example: {{.Value}}{{.Attributes.GetAsString "suffix"}}</span>`
var t = template.New("example")
var tmpl = template.Must(t.Parse(tmplStr))
output := &strings.Builder{}
content := strings.NewReader(`example::hello world[suffix=!!!!!]`)
libasciidoc.Convert(content, output, renderer.WithMacroTemplate(tmpl.Name(), tmpl))
== How to contribute
Please refer to the link:CONTRIBUTE.adoc[Contribute] page.
== License
Libasciidoc is available under the terms of the https://raw.githubusercontent.com/bytesparadise/libasciidoc/LICENSE[Apache License 2.0].
== Trademark
AsciiDoc is a trademark of the Eclipse Foundation