To get an deployment of NOI running quickly on a Linux box with Docker installed (for example, a DigitalOcean droplet), run the following in terminal:

curl -L https://github.com/docker/compose/releases/download/1.4.2/docker-compose-`uname -s`-`uname -m` > /usr/local/bin/docker-compose
chmod +x /usr/local/bin/docker-compose
git clone https://github.com/GovLab/noi2.git
cd noi2
cp app/config/local_config.sample.yml app/config/local_config.yml

Now read app/config/local_config.yml and optionally edit it to taste.

Build necessary images with:

docker-compose build

Then, get the database ready:

./manage.sh db upgrade

You may also want to seed the database with a bunch of random users and other data, which can be done via:

./manage.sh populate_db

To get everything running:

docker-compose up

For information on deploying to production, including setting up SSL and more, see DEPLOYING.md.

Please install Docker Toolbox. This will ensure that you have Docker, Docker Machine, and Docker Compose on your system.

Since Docker Machine doesn't expose containers to localhost or 127.0.0.1, you will need to go to the IP address you get from

docker-machine ip default

The server should be running on port 80.

Unfortunately, because Docker Compose isn't currently available for Windows at the time of this writing, the only way to develop NoI is to set up a Linux virtual machine using a tool like VirtualBox.

• with psql:

	docker-compose run db psql -h db -p 5432 -U postgres -d postgres

• with python and sqlalchemy:

	docker-compose run app python

	from app.models import db

	from sqlalchemy import create_engine

	from sqlalchemy.orm import sessionmaker

	engine = create_engine('postgres://postgres:@db:5432/postgres')

	Session = sessionmaker(bind=engine)

	session = Session()

start querying with session.query()

Whenever you make changes to model.py, you will need to generate a migration for the database. Alembic can generate one automatically, which you will most likely need to tweak:

./manage.sh db migrate

If the generation is successful, you should receive a message like:

Generating /migrations/versions/<migration hash>_.py ... done

Then, you should edit the migration at migrations/versions/<migration hash>.py, at the very least adding a human-readable description of the purpose of the migration.

You'll need to manually restart the server using docker-compose up or ./deploy.sh. The migration will run automatically upon restart.

Don't forget to commit the migration in git with your new code!

Running this will generate all necessary translation files for locales that are in deployments.yaml.

./manage.sh translate

You'll need to populate the resulting .po file for each locale in translations/<locale>/LC_MESSAGES/messages.po, then run

./manage.sh translate_compile

To generate the .mo file used in actual translation. Successive runs of the script won't destroy any data in the .po file, which is kept in version control.

To run the unit tests, simply run:

./nosetests.sh

This just executes nosetests inside the web application's Docker container.

Tests are located in app/tests. Please feel free to add more!

This app uses two different Dockerfiles:

• app/Dockerfile is the "base" container for the app; it's hosted on Docker Hub and retrieved from there. It's fairly large, takes a long time to build; it's also versioned and shouldn't change very often.
• app/docker-quick/Dockerfile sits atop the base container and is built on development/production infrastructure. It shouldn't take long to build, and its contents should regularly be moved over to app/Dockerfile and tagged as a new version on Docker Hub.

This is done to make it fast to get new deploys and Travis CI builds up and running, while also making it easy to experiment with new dependencies.

This Dockerfile is easy to update; just change the file or requirements.quick.txt as needed and re-run docker-compose build to rebuild the container.

You may want to run docker-compose run app bash to poke into your newly-built container and make sure things work.

Updating this Dockerfile takes more work:

1. Find the current version of the base dockerfile by looking at the FROM directive of app/docker-quick/Dockerfile. The rest of these instructions assume it is docker-base-0.1 for the sake of example.
2. Move lines from app/docker-quick/Dockerfile and requirements.quick.txt over to app/Dockerfile and requirements.txt as needed.
3. Commit the changes and tag the revision with git tag docker-base-0.2.
4. Push the changes to GovLab/noi2 on GitHub with git push git@github.com:GovLab/noi2.git docker-base-0.2. This will trigger a new build of the container on Docker Hub, which you can monitor at Docker Hub's Build Details page.
5. Once Docker Hub is finished, update the FROM directive of app/docker-quick/Dockerfile to point to docker-base-0.2.

We use SASS for our styles; all files are contained in app/static/sass.

We also use the PostCSS Autoprefixer to post-process the compiled CSS and ensure that it works across all browsers.

When DEBUG is True (i.e., during development), we use SASS middleware to dynamically recompile SASS to CSS on-the-fly; however, this middleware has a few drawbacks.

For technical reasons, the dynamically-compiled CSS is actually served from a different directory than the precompiled CSS is served from in production. Because of this, links to compiled SASS in templates need to use the COMPILED_SASS_ROOT global, while links to static assets (like images) in SASS need to use the $path-to-static variable.

For more details on how we write our SASS, see the project's SASS README.