UPDATE (10/31/17): This project is no longer actively maintained since https://signal.org/blog/standalone-signal-desktop/ is out now.
THIS IS NOT PRODUCTION READY. Use at your own risk. I am in no way affiliated with WhisperSystems.
You must have git, node 7.x, and either npm or Yarn installed. Then:
git clone --recursive https://github.com/diracdeltas/signal-muon.git cd signal-muon npm install
npm run build
yarn run build
Then open the app in the build directory logged in the console. Ex:
open Signal-darwin-x64/Signal.app/ on MacOS.
First fetch changes:
git pull origin master git submodule update --recursive
If you are updating by a MAJOR or MINOR version number (ex: 0.0.3 to 0.1.0, or 0.1.0 to 1.0.0), run the following step to get an updated version of chromium. If you are updating by a PATCH version (ex: 0.0.2 to 0.0.3), skip the following step.
npm run muon-update
Then re-build the package.
Running in development mode
To run in development mode with the Signal staging server (no need to pair
with a mobile device), do
npm/yarn start instead of
npm/yarn run build.
In development mode, you can only message accounts that are registered on the Signal staging server, so you will probably be very lonely unless you want to talk to other Signal contributors. If you want someone to talk to, my test number is (oldest telephone area code in San Francisco) + (decimal char code of capital Epsilon) + (the 513th prime).
If you want to link Signal-Muon to your mobile device so that you can talk to your contacts, you need to do a build.