Ruby Cookbook

Use mise to select Ruby and tasks to run the application's Bundler and Rails commands. This recipe assumes an existing Rails project with Gemfile, Gemfile.lock, and bin/rails. Add RuboCop to the development bundle before using the lint task. Install Ruby's platform dependencies as described in the Ruby guide.

A Ruby on Rails Project

toml

min_version = "2024.9.5"

[env]
# Project information
PROJECT_NAME = "{{ config_root | basename }}"

[tools]
# Install Ruby with the specified version
ruby = "{{ get_env(name='RUBY_VERSION', default='3.3.3') }}"

[tasks."bundle:install"]
description = "Install gem dependencies"
run = "bundle install"

[tasks.server]
description = "Start the Rails server"
alias = "s"
run = "bundle exec rails server"

[tasks.test]
description = "Run tests"
alias = "t"
run = "bundle exec rails test"

[tasks.lint]
description = "Run lint using Rubocop"
alias = "l"
run = "bundle exec rubocop"

Run mise run bundle:install after cloning, then mise run test or mise run server. bundle exec selects the executables from the project's bundle, including its locked Rails and RuboCop versions. Application setup such as database creation remains part of the Rails project's own instructions.