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CONTRIBUTING.md

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Contributing

OpenSeadragon is truly a community project; we welcome your involvement!

When contributing, please attempt to match the code style already in the codebase. However, we are in the process of changing our code style (see issue #456), so avoid spaces inside parentheses and square brackets. Note that we use four spaces per indentation stop. For easier setup you can also install EditorConfig if your IDE is supported. For more thoughts on code style, see idiomatic.js.

When fixing bugs and adding features, when appropriate please also:

  • Update related doc comments (we use JSDoc 3)
  • Add/update related unit tests

If you're new to the project, check out our good first bug issues for some places to dip your toe in the water.

If you're new to open source in general, check out GitHub's open source intro guide.

First Time Setup

All command-line operations for building and testing OpenSeadragon are scripted using Grunt which is based on Node.js. To get set up:

  1. Install Node, if you haven't already (available at the link above)
  2. Install the Grunt command line runner (if you haven't already); on the command line, run npm install -g grunt-cli
  3. Clone the openseadragon repository
  4. On the command line, go in to the openseadragon folder
  5. Run npm install

You're set, all development dependencies should have been installed and the project built... continue reading for build and test instructions.

Building from Source

To build, just run (on the command line, in the openseadragon folder):

grunt

If you want Grunt to watch your source files and rebuild every time you change one, use:

grunt watch

To have it watch your source files and also run a server for you to test in:

grunt dev

The built files appear in the build folder.

If you want to build tar and zip files for distribution (they will also appear in the build folder), use:

grunt package

Note that the build folder is masked with .gitignore; it's just for your local use, and won't be checked in to the repository.

You can also publish the built version to the site-build repository. This assumes you have cloned it next to this repository. The command is:

grunt publish

... which will delete the existing openseadragon folder, along with the .zip and .tar.gz files, out of the site-build folder and replace them with newly built ones from the source in this repository; you'll then need to commit the changes to site-build.

Testing

Our tests are based on QUnit and PhantomJS; they're both installed when you run npm install. To run on the command line:

grunt test

If you wish to work interactively with the tests or test your changes:

grunt connect watch

and open http://localhost:8000/test/test.html in your browser.

Another good page, if you want to interactively test out your changes, is http://localhost:8000/test/demo/basic.html.

You can also get a report of the tests' code coverage:

grunt coverage

The report shows up at coverage/html/index.html viewable in a browser.