kevinburke / chroma-markdown

Combined Markdown + syntax highlight HTML compiler

chroma-markdown

This binary compiles Markdown files into HTML. In particular, code blocks of the following format:

# Section Title

```go
fmt.Println("hello world")
```

Will be parsed and compiled to HTML using chroma, a tool for generating syntax highlights. The rest of the file will be compiled from markdown to HTML.

<h1>Section Title</h1>
<pre class="chroma"><span class="nx">fmt</span><span class="p">.</span><span class="nx">Println</span><span class="p">(</span><span class="s">&#34;hello world&#34;</span><span class="p">)</span>
</pre>

Input can be sent either on standard input or by specifying a filename at the command line. All outputs are printed to standard output, where they can be redirected to a file:

cat index.md | chroma-markdown > output.html

Why?

You can use this with content management systems that want you to use an HTML editor, like WordPress. There are tools that do Markdown compilation and tools that do syntax highlighting but few that do both.

Requirements

This requires either Commonmark (cmark) or Markdown (markdown) binaries to be present on your $PATH. The Go markdown renderer has a critical error that prevents in-memory Markdown compilation.

Installation

Find your target operating system (darwin, windows, linux) and desired bin directory, and modify the command below as appropriate:

curl --silent --location --output=/usr/local/bin/chroma-markdown https://github.com/kevinburke/chroma-markdown/releases/download/0.1/chroma-markdown-linux-amd64 && chmod 755 /usr/local/bin/chroma-markdown

The latest version is 0.1.

If you have a Go development environment, you can also install via source code:

go get -u github.com/kevinburke/chroma-markdown

This should place a chroma-markdown binary in $GOPATH/bin, so for me, ~/bin/chroma-markdown.