gist-txt

A minimal text adventure engine.

Usage

Create a new public gist at https://gist.github.com/.

The gist should contain at least an index.markdown file used as a starting point for your text adventure, also called the main scene.

See more about markdown syntax at http://daringfireball.net/projects/markdown/syntax.

Scenes

Every new *.markdown file is a scene.

Example: the file city.markdown is the city scene.

Links

Links between scenes are relative links to the scene name.

Example: to make the string "go to the city" a link to the city scene add the markdown code:

[go to the city](city)

You can make links to the main scene using the index name, example:

[Restart the game](index)

Story state and Mustache tags

The story has a global state that could be set using YAML Front Matter blocks.

YAML Front Matter blocks are blocks of YAML at the top of each scene file. You can alter story's state by adding an object associated to the state property.

Story's state can be used to change the behavior of the scene by adding Mustache tags.

For example the scene:

---
state:
  name: John
---

Hi {{name}}!

compiles to the following HTML:

<p>Hi John!</p>

You can learn more about Mustache tags and syntax at https://github.com/janl/mustache.js.

Custom styles

The global stylesheet is determined by the existence on the gist of a file named style.css. Rules in this file get applied during the initialization of the story before the first scene is rendered.

Scene's stylesheet are associated to the style property of the YAML Front Matter of every scene. The stylesheet is enabled when the scene is active and disabled when the scene is not active.

Scene initialization

You can run JavaScript code at every new visit of a scene by implementing a function associated to YAML Front Matter's init property.

Hosting

Your text adventures are already hosted by default at GitHub Gist.

You can share your games by sharing a link with the format http://potomak.github.io/gist-txt/#<your-gist-id>.

An example text adventure is stored in the gist acebd8fe14942fab4e8e (https://gist.github.com/potomak/acebd8fe14942fab4e8e) and could be shared with a link to http://potomak.github.io/gist-txt/#acebd8fe14942fab4e8e

Documentation

You can find the documentation at http://potomak.github.io/gist-txt/docs/gist-txt.html.

Generate documentation for the project by running:

npm run doc

Testing

There is a suite of tests you can execute by running:

npm test

Type checker

This project uses Flow for type checking the JS source code.

You can run:

npm run flow

to verify that types check.

Linting

Run:

npm run lint

Building the bundle

Run:

npm run build

to build a minimized bundle that contains the game engine all its dependencies.

Development

During development you want to be able to debug your code and continuously rebuild the bundle after any change to your code.

Run:

npm run watch

to build a development version of the bundle that includes source maps and to automatically rebuild the bundle on code changes.

HTTP server

Run the HTTP server:

npm run serve

and open http://localhost:8080.

Story development environment

If you want to develop your text adventure locally, you can use the special DEV gist id to tell the tool to search for project files inside the /dist/dev directory instead of making external HTTP requests.

Acknowledgements

This project has been inspired by Twine and bl.ocks.org.