Parity

Shell commands for development, staging, and production parity for Heroku apps.

Install

On OS X, this installs everything you need:

brew tap thoughtbot/formulae
brew install parity

On Debian:

wget -qO - https://apt.thoughtbot.com/thoughtbot.gpg.key | sudo apt-key add -
echo "deb http://apt.thoughtbot.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/thoughtbot.list
sudo apt-get update
sudo apt-get install parity

On other systems you can:

Download the package for your system from the releases page
Extract the tarball and place it so that /bin is in your PATH

Parity requires these command-line programs:

git
heroku
pg_restore

On OS X, these programs are installed as Homebrew package dependencies of the parity Homebrew package.

Usage

Backup a database:

production backup
staging backup

Restore a production or staging database backup into development:

development restore production
development restore staging

Or, if restore-from reads better to you, it's the same thing:

development restore-from production
development restore-from staging

Note that the restore command will use the most recent backup (from staging or production). You may first need to create a more recent backup before restoring, to prevent download of a very old backup.

Push your local development database backup up to staging:

staging restore development

Deploy from master to production and migrate and restart the dynos if necessary:

production deploy

Deploy the current branch to staging or a feature branch and migrate and restart the dynos if necessary:

staging deploy

Note that deploys to non-production environments use git push --force.

Open a console:

production console
staging console

Migrate a database and restart the dynos:

production migrate
staging migrate

Tail a log:

production tail
staging tail

Use redis-cli with your REDIS_URL add-on:

production redis-cli
staging redis-cli

The scripts also pass through, so you can do anything with them that you can do with heroku ______ --remote staging or heroku ______ --remote production:

watch production ps
staging open

Convention

Parity expects:

A staging remote pointing to the staging Heroku app.
A production remote pointing to the production Heroku app.

heroku git:remote -r staging -a your-staging-app
heroku git:remote -r production -a your-production-app

There is a config/database.yml file that can be parsed as YAML for ['development']['database'].

Customization

If you have Heroku environments beyond staging and production (such as a feature environment for each developer), you can add a binstub to the bin folder of your application. Custom environments share behavior with staging: they can be backed up and can restore from production.

Using feature environments requires including Parity as a gem in your application's Gemfile.

gem "parity"

Here's an example binstub for a 'feature-geoff' environment, hosted at myapp-feature-geoff.herokuapp.com.

#!/usr/bin/env ruby

require "parity"

if ARGV.empty?
  puts Parity::Usage.new
else
  Parity::Environment.new("feature-geoff", ARGV).run
end

Issues

Please fill out our issues template if you are having problems.

Contributing

Please see CONTRIBUTING.md for details.

Version History

Please see the releases page for the version history, along with a description of the changes in each release.

Releasing

See guidelines in RELEASING.md for details

License

About thoughtbot

Parity is maintained and funded by thoughtbot, inc. The names and logos for thoughtbot are trademarks of thoughtbot, inc.

We are passionate about open source software. See our other projects. We are available for hire.

zachlatta / parity