Svelte On Rails

A sample project that demonstrates using webpacker-svelte to add Svelte components to a Rails app for a smaller, simpler alternative to React.

Generated with Raygun.

Development

Getting Started

Requirements

To run the specs or fire up the server, be sure you have these installed (and running):

• Ruby 2.6 (see .ruby-version).
• PostgreSQL 11.2+ (brew install postgresql).
• Heroku CLI (brew install heroku).

First Time Setup

bin/setup

After cloning, run ./bin/setup to install missing gems and prepare the database.

Note, rake db:sample_data (run as part of setup) loads a small set of data for development. Check out db/sample_data.rb for details.

.env

The bin/setup script will create a .env file that defines settings for your local environment. Do not check this into source control. Refer to the environment variables section below for what can be specified in .env.

Running the Specs

To run all Ruby and Javascript specs.

$ ./bin/rake

Note: ./bin/rake runs the springified version of rake (there's a ./bin/rspec and ./bin/rails too). You can add ./bin to your PATH too, then you'll always use the springified bins when they exist. See rails/spring for additional information.

Running the Application Locally

The easiest way to run the app is using heroku local. This starts all the processes defined in Procfile, including the Rails server.

$ heroku local
$ open http://localhost:3000

Conventions

Git

• Branch development is auto-deployed to acceptance.
• Branch master is auto-deployed to production.
• Create feature branches off of development using the naming convention (features|chores|bugs)/a-brief-description-######, where ###### is the tracker id.
• Rebase your feature branch before merging into development to produce clean/compact merge bubbles.
• Always retain merge commits when merging into development (e.g. git merge --no-ff branchname).
• Use git merge development (fast-forward, no merge commit) from master.
• Craft atomic commits that make sense on their own and can be easily cherry-picked or reverted if necessary.

Code Style

Rubocop is configured to enforce the style guide for this project.

Additional/Optional Development Details

Code Coverage (local)

Coverage for the ruby specs:

$ COVERAGE=true rspec

Code coverage is reported to Code Climate on every CI build so there's a record of trending.

Using Guard

Guard is configured to run ruby specs, and also listen for livereload connections.

$ bundle exec guard

Using Mailcatcher

$ gem install mailcatcher
$ mailcatcher
$ open http://localhost:1080/

Learn more at mailcatcher.me. And please don't add mailcatcher to the Gemfile.

Using ChromeDriver

The ChromeDriver version used in this project is maintained by the webdrivers gem. This is means that the feature specs are not running against the ChromeDriver installed previously on the machine, such as by Homebrew.

Headed vs headless Chrome

System specs marked with js: true run using headless Chrome by default, in the interest of speed. When writing or troubleshooting specs, you may want to run the normal (i.e. "headed") version of Chrome so you can see what is being rendered and use the Chrome developer tools.

To do so, specify HEADLESS=false in your environment when running the specs. For example:

$ HEADLESS=false bin/rspec spec/system

Continuous Integration/Deployment with CircleCI and Heroku

This project is configured for continuous integration with CircleCI, see .circleci/config.yml for details.

On successful builds, Heroku will trigger a deployment via its GitHub Integration.

Server Environments

Hosting

Acceptance and Production are hosted on Heroku under the email@example.com account.

Environment Variables

Several common features and operational parameters can be set using environment variables.

Required

• SECRET_KEY_BASE - Secret key base for verifying signed cookies. Should be 30+ random characters and secret!

Optional

• HOSTNAME - Canonical hostname for this application. Other incoming requests will be redirected to this hostname.
• FORCE_SSL - Require all requests to come over a secure connection (default: false).
• BASIC_AUTH_PASSWORD - Enable basic auth with this password.
• BASIC_AUTH_USER - Set a basic auth username (not required, password enables basic auth).
• RACK_TIMEOUT_SERVICE_TIMEOUT - Terminate requests that take longer than this time (default: 15s).
• ASSET_HOST - Asset host for static assets (e.g. CDN) (default: none).
• PORT - Port to listen on (default: 3000).
• WEB_CONCURRENCY - Number of puma workers to spawn (default: 1).
• RAILS_MAX_THREADS - Threads per worker (default: 5).
• RAILS_MIN_THREADS - Threads per worker (default: 5).
• DB_POOL - Number of DB connections per pool (i.e. per worker) (default: RAILS_MAX_THREADS or 5).
• RAILS_LOG_TO_STDOUT - Log to standard out, good for Heroku (default: false).
• RAILS_SERVE_STATIC_FILES - Serve static assets, good for Heroku (default: false).

Third Party Services

• Heroku for hosting.
• CircleCI for continuous integration.