Tidy Markdown
Beautify Markdown, fixing formatting mistakes and converting basic HTML & Unicode into their Markdown equivalents. Based on the conventions in Carrot Creative's Markdown Styleguide and built on Marked.
There is also an Atom Plugin to run this entirely within your editor.
Install
Tidy Markdown is an npm package, so it can be installed like this:
npm install tidy-markdown -gCLI
Tidy Markdown includes a simple CLI. It operates entirely over STDIN/STDOUT. For example:
$ echo "# a header #" | tidy-markdown
# a headerOr using a file:
$ tidy-markdown < ./ugly-markdown
# Some markdown
Lorem ipsum dolor adipiscing
- one
- two
- threeAnd, of course, we can output to a file too:
$ tidy-markdown < ./ugly-markdown > ./clean-markdownEditing In-place
If you want to rewrite a file in-place, you can use sponge from moreutils. If you did tidy-markdown < ./README.md > ./README.md you'd end up with an empty file.
$ tidy-markdown < ./README.md | sponge ./README.mdDocs
The --help arg will make it show a usage page:
$ tidy-markdown --help
usage: tidy-markdown [-h] [-v] [--no-ensure-first-header-is-h1]
Fix ugly markdown. Unformatted Markdown is read from STDIN, formatted, and
written to STDOUT.
Optional arguments:
-h, --help Show this help message and exit.
-v, --version Show program's version number and exit.
--no-ensure-first-header-is-h1
Disable fixing the first header when it isn't an H1.
This is useful if the markdown you're processing
isn't a full document, but rather a piece of a larger
document.
API
Tidy Markdown only exports one function. Here's an example of how it can be used:
tidyMarkdown = require 'tidy-markdown'
uglyMarkdown = '''
# Some markdown #
Lorem ipsum dolor adipiscing
- one
* two
+ three
'''
cleanMarkdown = tidyMarkdown(uglyMarkdown)
console.log cleanMarkdownwhich outputs:
# Some markdown
Lorem ipsum dolor adipiscing
- one
- two
- threeYou can also pass options through a 2nd arg, like tidyMarkdown(uglyMarkdown, {ensureFirstHeaderIsH1: false}). The option ensureFirstHeaderIsH1 is the only one right now.
Features
- Standardize syntactical elements to use a single way of being written (for example, all unordered lists are formatted to start with hyphens, rather than allowing asterisks and/or addition signs to be mixed in).
- Fix numbering - making ordered lists count naturally from 1 to n and reference links do the same (based on first occurance).
- Make headers move from
h1to smaller without gaps (like anh1followed by anh4would be corrected to anh1followed by anh2). - Decode Unicode characters that have markdown equivalents (like a horizontal ellipsis becomes "..." and an em-dash becomes "--").
- Format YAML front-matter and Markdown tables.
- Convert HTML elements into their Markdown equivalents. For example,
<em>text</em>becomes_text_.
Minimal Configuration
Tidy Markdown works hard to keep configuration to a minimum. The goal is to create a highly readable, canonical representation of Markdown, much like gofmt has done for Go. Having extra configuration would defeat that purpose and add extra maintenance work.
That's not to say you shouldn't open issues if you find the output ugly, that's encouraged, especially in the styleguide repo because without criticism it won't get better. However, you should provide examples and a good argument to support the change.
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