gh-preview

Github Markdown Preview

Preview Github markdown - as you type

The most exciting part in a project's lifetime is bragging about how awesome it is, usually in it's README file. However, to get the wording and formatting just right, one would need to write the file using Github's online editor, switching back and forth between editing and previewing, loosing all the efficiencies of using a copy of the vim text editor.

Features

• Preview rendered markdown as you type
• Output is rendered as if it was already on github
• Editor-friendly
• Since v0.2.2: Scroll synchronization, inspired by Ghost.

Getting started

The server is running on node and requires npm to install:

$ npm install -g gh-preview

To run the server manually, use the gh-preview command. Note that the vim plugin will start the server automatically if it is not already running at the given port.

Usage:
  gh-preview [--port=<port>]
 
Options:
  -p, --port=<port>  The port to bind to [Default: 1234]

Editor integration

• Vim via felixschl/vim-gh-preview

Where is my editor?

Feel free to contribute an editor plugin for your favourite editor and open an issue on github to have it mentioned here.

How to write an editor plugin?

Simply have your editor perform HTTP POST requests to the running gh-preview instance. The plugin may optionally start a new gh-preview server. For command line usage, refer to the README.

To see an example usage, check out the tests and the vim plugin. From the tests:

import request from 'request';
request.post({
  url:  'localhost:${ port }/api/doc'
, json: { 'file': '/bar/foo.md'
        , 'markdown': '# Foo!' }});

This will create a document titled foo.md, with the markdown being # Foo!. The markdown will then be rendered on the client, as served by the gh-preview server.

Caveats

Github uses pygments for their syntax highlighting, whereas this project uses highlight.js - which, while awesome - is not pygments and differences are bound to occur.

Random wishlist

Since this a very purpose-driven project - that is to be able to interactively preview markdown files before publishing to github - work on this project is not focused and hence the following items, albeit relatively simple tasks, are likely to remain wishes for the future to come.

• Show the caret in the output
• Anchor tag support for permalinks in headings
• Implement :GhPreviewOpenBrowser command for vim
• Implement :GhPreviewStart command for vim
• Implement :GhPreviewStop command for vim
• Improve error reporting if the server goes away, etc.
• Improve scroll synchronization

Contributing

Business as usual. Get started by running the test suite:

git clone [e-mail]:felixschl/gh-preview
cd gh-preview
npm install -g gulp
npm install
gulp
npm test

Then fix bug / add feature and submit a pull request.