markd
Yet another markdown parser built for speed, written in Crystal, Compliant to CommonMark specification (v0.27
). Copy from commonmark.js.
Installation
Add this to your application's shard.yml
:
dependencies:
markd:
github: icyleaf/markd
Quick start
require "markd"
markdown = <<-MD
# Hello Markd
> Yet another markdown parser built for speed, written in Crystal, Compliant to CommonMark specification.
MD
html = Markd.to_html(markdown)
Also here are options to configure the parse and render.
options = Markd::Options.new(smart: true, safe: true)
Markd.to_html(markdown, options)
Options
| Name | Type | Default value | Description |
| ----------- | ------ | ------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| time | Bool
| false | render parse cost time during read source, parse blocks, parse inline. |
| smart | Bool
| false | if true, straight quotes will be made curly,--
will be changed to an en dash,---
will be changed to an em dash, and...
will be changed to ellipses. |
| source_pos | Bool
| false | if true, source position information for block-level elements
will be rendered in the data-sourcepos attribute (for HTML) |
| safe | Bool
| false | if true, raw HTML will not be passed through to HTML output (it will be replaced by comments) |
| prettyprint | Bool
| false | if true, code tags generated by code blocks will have a prettyprint
class added to them, to be used by Google code-prettify. |
| gfm | Bool
| false | Not supported for now |
| toc | Bool
| false | Not supported for now |
| base_url | URI?
| nil | if not nil, relative URLs of links are resolved against this URI
. It act's like HTML's <base href="base_url">
in the context of a Markdown document. |
Advanced
If you want to use a custom renderer, it can!
class CustomRenderer < Markd::Renderer
def strong(node, entering)
end
# more methods following in render.
end
options = Markd::Options.new(time: true)
document = Markd::Parser.parse(markdown, options)
renderer = CustomRenderer.new(options)
html = renderer.render(document)
Performance
First of all, Markd is slower than Crystal Built-in Markdown which it is a lite version, only apply for generte Cystal documents (#4496, #4613).
Here is the result of a sample markdown file parse at MacBook Pro Retina 2015 (2.2 GHz):
Crystal Markdown 3.28k (305.29µs) (± 0.92%) fastest
Markd 305.36 ( 3.27ms) (± 5.52%) 10.73× slower
Recently, I'm working to compare the other popular commonmark parser, the code is stored in benchmarks.
Donate
Markd is an open source, collaboratively funded project. If you run a business and are using Markd in a revenue-generating product, it would make business sense to sponsor Markd development. Individual users are also welcome to make a one time donation if Markd has helped you in your work or personal projects.
You can donate via Paypal.
How to Contribute
Your contributions are always welcome! Please submit a pull request or create an issue to add a new question, bug or feature to the list.
All Contributors are on the wall.
You may also like
- halite - HTTP Requests Client with a chainable REST API, built-in sessions and middlewares.
- totem - Load and parse a configuration file or string in JSON, YAML, dotenv formats.
- poncho - A .env parser/loader improved for performance.
- popcorn - Easy and Safe casting from one type to another.
- fast-crystal - 💨 Writing Fast Crystal 😍 -- Collect Common Crystal idioms.
License
MIT License © icyleaf