Getting Started

This guide explains now to install and use Markly.

Installation

Add the gem to your project:

$ bundle add async

Usage

Markly's most basic usage is to convert Markdown to HTML. You can do this in a few ways:

require 'markly'

Markly.render_html('Hi *there*')
# <p>Hi <em>there</em></p>\n

You can also parse a string to receive a Document node. You can then print that node to HTML, iterate over the children, and other fun node stuff. For example:

require 'markly'

document = Markly.parse('*Hello* world')
puts(document.to_html) # <p>Hi <em>there</em></p>\n

document.walk do |node|
	puts node.type # [:document, :paragraph, :text, :emph, :text]
end

Options

Markly accepts integer flags which control how the Markdown is parsed and rendered.

Parse Options

Name	Description
`Markly::DEFAULT`	The default parsing system.
`Markly::UNSAFE`	Allow raw/custom HTML and unsafe links.
`Markly::FOOTNOTES`	Parse footnotes.
`Markly::LIBERAL_HTML_TAG`	Support liberal parsing of inline HTML tags.
`Markly::SMART`	Use smart punctuation (curly quotes, etc.).
`Markly::STRIKETHROUGH_DOUBLE_TILDE`	Parse strikethroughs by double tildes (compatibility with redcarpet)
`Markly::VALIDATE_UTF8`	Replace illegal sequences with the replacement character `U+FFFD`.

Render Options

Name	Description
`Markly::DEFAULT`	The default rendering system.
`Markly::UNSAFE`	Allow raw/custom HTML and unsafe links.
`Markly::GITHUB_PRE_LANG`	Use GitHub-style `<pre lang>` for fenced code blocks.
`Markly::HARD_BREAKS`	Treat `\n` as hardbreaks (by adding `<br/>`).
`Markly::NO_BREAKS`	Translate `\n` in the source to a single whitespace.
`Markly::SOURCE_POSITION`	Include source position in rendered HTML.
`Markly::TABLE_PREFER_STYLE_ATTRIBUTES`	Use `style` insted of `align` for table cells.
`Markly::FULL_INFO_STRING`	Include full info strings of code blocks in separate attribute.

Passing Options

To apply a single option, pass it in as a flags option:

Markly.parse("\"Hello,\" said the spider.", flags: Markly::SMART)
# <p>“Hello,” said the spider.</p>\n

To have multiple options applied, | (or) the flags together:

Markly.render_html("\"'Shelob' is my name.\"", flags: Markly::HARD_BREAKS|Markly::SOURCE_POSITION)

Extensions

Both render_html and parse take an optional third argument defining the extensions you want enabled as your CommonMark document is being processed. The documentation for these extensions are defined in this spec, and the rationale is provided in this blog post.

The available extensions are:

:table - This provides support for tables.
:tasklist - This provides support for task list items.
:strikethrough - This provides support for strikethroughs.
:autolink - This provides support for automatically converting URLs to anchor tags.
:tagfilter - This escapes several "unsafe" HTML tags, causing them to not have any effect.

Developing Locally

After cloning the repo:

$ bake build test