markd

THIS PROJECT IS LOOKING FOR MAINTAINER

Unfortunately, the maintainer no longer has the time and/or resources to work on markd further. This means that bugs will not be fixed and features will not be added unless someone else does so.

If you're interested in fixing up markd, please file an issue let me know.

---

Yet another markdown parser built for speed, written in Crystal, Compliant to CommonMark specification (v0.29). 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

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)

Use tartrazine shards to render code block.

Added and require tartrazine before markd will use it to render code block.

By default, it use formatter like following:

formatter = Tartrazine::Html.new(
  theme: Tartrazine.theme("catppuccin-macchiato"),
  line_numbers: true,
  standalone: true,
)

You can passing a formatter instead.

e.g.

require "tartrazine" # require it before markd
require "markd"

formatter = Tartrazine::Html.new(
  theme: Tartrazine.theme("emacs"),
  
  # Disable print line number
  line_numbers: false,
  
  # Set standalone to false for better performace.
  #
  # You need generate css file use `bin/tartrazine -f html -t "emacs" --css`, 
  # then link it in you site.
  standalone: false,
)

html = Markd.to_html(markdown,formatter: formatter)

If you don't care about the formatter config, you can just passing a string instead.

require "tartrazine" # require it before markd
require "markd"

html = Markd.to_html(markdown, formatter: "emacs")

Currently Tartrazine supports 247 languages and 331 themes, you can retrieve the supported languages use Tartrazine::LEXERS_BY_NAME.values.uniq.sort, for now the result is:

[
  "LiquidLexer", "VelocityLexer", 
  
  "abap", "abnf", "actionscript", "actionscript_3", "ada", "agda", "al", "alloy", "angular2", 
  "antlr",   "apacheconf", "apl", "applescript", "arangodb_aql", "arduino", "armasm", 
  "autohotkey", "autoit", "awk", 
  
  "ballerina", "bash", "bash_session", "batchfile", "bbcode", "bibtex", "bicep", "blitzbasic", 
  "bnf", "bqn", "brainfuck", 
  
  "c", "c#", "c++", "cap_n_proto", "cassandra_cql", "ceylon", "cfengine3", "cfstatement", 
  "chaiscript", "chapel",   "cheetah", "clojure", "cmake", "cobol", "coffeescript", 
  "common_lisp", "coq", "crystal", "css", "cue", "cython", 
  
  "d", "dart", "dax", "desktop_entry", "diff", "django_jinja", "dns", "docker", "dtd", "dylan", 
  
  "ebnf", "elixir", "elm", "emacslisp", "erlang", 
  
  "factor", "fennel", "fish", "forth", "fortran", "fortranfixed", "fsharp", 
  
  "gas", "gdscript", "gdscript3", "gherkin", "gleam", "glsl", "gnuplot", "go_template", 
  "graphql", "groff", "groovy", 
  
  "handlebars", "hare", "haskell", "hcl", "hexdump", "hlb", "hlsl", "holyc", "html", "hy", 
  
  "idris", "igor", "ini", "io", "iscdhcpd", 
  
  "j", "java", "javascript", "json", "jsonata", "julia", "jungle", 
  
  "kotlin", 
  
  "lighttpd_configuration_file", "llvm", "lua", 
  
  "makefile", "mako", "markdown", "mason", "materialize_sql_dialect", "mathematica", "matlab", 
  "mcfunction", "meson", "metal", "minizinc", "mlir", "modula-2", "moinwiki", "monkeyc", 
  "morrowindscript", "myghty", "mysql", 
  
  "nasm", "natural", "ndisasm", "newspeak", "nginx_configuration_file", "nim", "nix", 
  
  "objective-c", "objectpascal", "ocaml", "octave", "odin", "onesenterprise", "openedge_abl", 
  "openscad", "org_mode", 
  
  "pacmanconf", "perl", "php", "pig", "pkgconfig", "pl_pgsql", "plaintext", "plutus_core", 
  "pony", "postgresql_sql_dialect", "postscript", "povray", "powerquery", "powershell", 
  "prolog", "promela", "promql", "properties", "protocol_buffer",   "prql", "psl", "puppet", 
  "python", "python_2", 
  
  "qbasic", "qml", 
  
  "r", "racket", "ragel", "react", "reasonml", "reg", "rego", "rexx", "rpm_spec", "rst", 
  "ruby", "rust", 
  
  "sas", "sass", "scala", "scheme", "scilab", "scss", "sed", "sieve", "smali", "smalltalk", 
  "smarty", "snobol", "solidity", "sourcepawn", "sparql", "sql", "squidconf", "standard_ml", 
  "stas", "stylus", "swift", "systemd", "systemverilog", 
  
  "tablegen", "tal", "tasm", "tcl", "tcsh", "termcap", "terminfo", "terraform", "tex", 
  "thrift",  "toml", "tradingview", "transact-sql", "turing", "turtle", "twig", "typescript", 
  "typoscript", "typoscriptcssdata", "typoscripthtmldata", 
  
  "ucode", 
  
  "v", "v_shell", "vala", "vb_net", "verilog", "vhdl", "vhs", "viml", "vue", "wdte", 
  
  "webgpu_shading_language", "whiley", 
  
  "xml", "xorg", 
  
  "yaml", "yang", "z80_assembly", 
  
  "zed", "zig"
]

For details usage, check tartrazine documents.

Performance

Here is the result of a sample markdown file parse at MacBook Pro Retina 2015 (2.2 GHz):

Crystal Markdown (no longer present)   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.

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.

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License

MIT License © icyleaf