CODE.NASA.GOV

Catalog of Open Source Software from NASA. Built using Polymer.

The code.json file feeds the code.nasa.gov website and is reflected in the NASA projects available on code.gov

Most of code projects listed in code.json have real open-source licenses. Some have licenses that constrain use to other US government agencies. The license type for each code project is flagged in the json.

Setup

Prerequisites

Install bower and polymer-cli:

npm install -g bower polymer-cli

Check that you are using Node v8+

node -v

Install dependencies

bower i

Start the development server

This command serves the app at http://localhost:8080 and provides basic URL routing for the app:

polymer serve --open

Build

This command performs HTML, CSS, and JS minification on the application dependencies, and generates a service-worker.js file with code to pre-cache the dependencies based on the entrypoint and fragments specified in polymer.json. The minified files are output to the build/unbundled folder, and are suitable for serving from a HTTP/2+Push compatible server.

In addition the command also creates a fallback build/bundled folder, generated using fragment bundling, suitable for serving from non H2/push-compatible servers or to clients that do not support H2/Push.

polymer build

Preview the build

This command serves the minified version of the app at http://localhost:8080 in an unbundled state, as it would be served by a push-compatible server:

polymer serve build/unbundled

This command serves the minified version of the app at http://localhost:8080 generated using fragment bundling:

polymer serve build/bundled

Deploying

When deploying to a static web server (with no HTTP/2+Push), be sure to copy the files from build/bundled (NOT the project directory) which contains a functional service worker and minified files.

Adding a new view

You can extend the app by adding more views that will be demand-loaded e.g. based on the route, or to progressively render non-critical sections of the application. Each new demand-loaded fragment should be added to the list of fragments in the included polymer.json file. This will ensure those components and their dependencies are added to the list of pre-cached components (and will have bundles created in the fallback bundled build).