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shaka-player/docs/tutorials/welcome.md
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Joey Parrish 1a2c88745e Upgrade the Closure compiler to v20171203
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# Welcome to Shaka Player
Shaka Player is a JavaScript library for adaptive video streaming.
It plays [DASH][] content without browser plugins using
[MediaSource Extensions][] and [Encrypted Media Extensions][].
Shaka Player is meant to be deployed after being compiled. The tools you need
to compile the sources and documentation are included in the sources:
[Closure Compiler][], [Closure Linter][], and [JSDoc][].
If you are integrating Shaka Player into another Closure-based project, our
build process will generate externs for Shaka Player itself.
If you installed Shaka Player via npm, the source has been compiled and the
externs have been generated.
[DASH]: http://dashif.org/
[MediaSource Extensions]: http://w3c.github.io/media-source/
[Encrypted Media Extensions]: https://w3c.github.io/encrypted-media/
[Closure Compiler]: https://developers.google.com/closure/compiler/
[Closure Linter]: https://developers.google.com/closure/utilities/docs/linter_howto
[JSDoc]: http://usejsdoc.org/
#### Prerequisites
You can build Shaka on Linux, Windows, or Mac.
To get the sources and compile the library, you will need:
* Git 1.7.10+ {@link https://git-scm.com/downloads}
* Python 2.7.x {@link https://www.python.org/downloads/}
* Java Runtime Environment 8+ {@link https://java.com/en/download/}
* A local web server
* _NOTE: A local web server is required because browsers place restrictions
on applications from file:/// URLs._
Additionally, to build the documentation and run the tests, you will need:
* npm v1.3.12+ {@link https://nodejs.org/en/download/}
To quickly install these prerequisites on Ubuntu or Debian, run:
```sh
sudo apt-get update
sudo apt-get install git python2.7 default-jre-headless npm
# Upgrade npm and node to the latest versions
sudo npm install -g n
sudo n stable
sudo npm install -g npm
```
Installation instructions for other operating systems are not provided here.
(We can't possibly document them all.) You can follow the links above to
download and install the prerequisites.
#### Get the source
```sh
git clone https://github.com/google/shaka-player.git
cd shaka-player
```
#### Compile the library
```sh
python build/all.py
```
The output is:
* dist/shaka-player.compiled.js (compiled bundle)
* dist/shaka-player.compiled.debug.js (debug bundle)
* dist/shaka-player.compiled.externs.js
(generated externs, for Closure-based projects)
#### Generate the documentation
```sh
python build/docs.py
```
The output will be in `docs/api/`.
#### Run the tests
The tests depend on a few third-party tools, which are installed automatically
via `npm` when you run the tests. Nothing will be installed globally.
Run the tests in your platform's browsers using `./build/test.py`. You can
specify particular browsers with the `--browsers` argument. For example:
```sh
./build/test.py --browsers Opera
# or:
./build/test.py --browsers Chrome,Firefox,Edge
```
You can find a full list of available browsers with `--browsers help`, and you
can find a complete list of testing options with `--help`.
#### Join the announcement list
If you want to receive release or survey announcements, you should join our
[mailing list](https://groups.google.com/forum/#!forum/shaka-player-users).
The list is very low volume.
#### Continue the Tutorials
Next, check out {@tutorial basic-usage}.