Constrain Ruby to only supported versions

.tool-versions

@@ -1 +1,2 @@
 nodejs 24.10.0
+ruby 3.2.2

rails/Gemfile

@@ -1,5 +1,5 @@
 source 'https://rubygems.org'
-ruby '>= 3.0'
+ruby '>= 3.0', '< 3.4'
 
 gem 'rails', '7.0.7.2'
 
@@ -20,4 +20,4 @@ gem 'puma'
 
 gem 'pry'
 
-gem 'tzinfo-data', platforms: [:x64_mingw, :mingw, :mswin]
+gem 'tzinfo-data', platforms: [:x64_mingw, :mingw, :mswin]

rails/bin/determinator

@@ -1,29 +1,39 @@
 #!/usr/bin/env ruby
 
-gemfile = File.read("./Gemfile")
-REQUIRED_RUBY_VERSION = gemfile[/ruby ['"]>=(.+)['"]/, 1]
 ACTUAL_RUBY_VERSION = RUBY_VERSION
+PREFERRED_RUBY_VERSION = File.read("../.ruby-version").strip
 
 HOMEBREW_INSTALLATION_COMMAND = '/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"'
 RY_INSTALLATION_COMMAND = "brew update && brew install ry"
 
 RUBY_VERSION_MANAGER_INSTALLATION_INSTRUCTIONS = {
+  "asdf" => {
+    "install" => "asdf install ruby #{PREFERRED_RUBY_VERSION}",
+    "use" => "asdf set ruby #{PREFERRED_RUBY_VERSION}",
+  },
   "rbenv" => {
-    "install" => "rbenv install #{REQUIRED_RUBY_VERSION}",
-    "use" => "rbenv shell #{REQUIRED_RUBY_VERSION}",
+    "install" => "rbenv install #{PREFERRED_RUBY_VERSION}",
+    "use" => "rbenv shell #{PREFERRED_RUBY_VERSION}",
   },
   "rvm" => {
-    "install" => "rvm install #{REQUIRED_RUBY_VERSION}",
-    "use" => "rvm #{REQUIRED_RUBY_VERSION}",
+    "install" => "rvm install #{PREFERRED_RUBY_VERSION}",
+    "use" => "rvm #{PREFERRED_RUBY_VERSION}",
   },
   "ry" => {
-    "install" => "ry install #{REQUIRED_RUBY_VERSION}",
-    "use" => "eval $(ry setup); ry use #{REQUIRED_RUBY_VERSION}",
+    "install" => "ry install #{PREFERRED_RUBY_VERSION}",
+    "use" => "eval $(ry setup); ry use #{PREFERRED_RUBY_VERSION}",
   }
 }
 PREFERRED_RUBY_VERSION_MANAGERS = RUBY_VERSION_MANAGER_INSTALLATION_INSTRUCTIONS.keys.reject { |key| key == "ry" }
 FALLBACK_RUBY_VERSION_MANAGER = "ry"
 
+def parse_ruby_version_constraints
+  File.read("./Gemfile")[/ruby .*/][5..].split(',').map do |constraint|
+    constraint = constraint.gsub(/['"]/, '')
+    Gem::Dependency.new('ruby', constraint)
+  end
+end
+
 def command_exists?(command)
   system("command -v #{command} &> /dev/null")
 end
@@ -50,11 +60,13 @@ def ry_needs_to_be_installed?
   !command_exists?("ry")
 end
 
+RUBY_VERSION_CONSTRAINTS = parse_ruby_version_constraints
+
 puts ""
 puts "🤖 I am The Determinator! Come with me if you want to use the right Ruby version!"
-puts "ℹ️  Minicom uses Ruby #{REQUIRED_RUBY_VERSION} or greater. Let me check what version of Ruby you have…"
+puts "ℹ️  Minicom uses Ruby #{RUBY_VERSION_CONSTRAINTS.map{ |d| d.requirement.to_s }.join(', ')}. Let me check what version of Ruby you have…"
 
-if REQUIRED_RUBY_VERSION <= ACTUAL_RUBY_VERSION
+if RUBY_VERSION_CONSTRAINTS.all?{ |d| d.match?('ruby', ACTUAL_RUBY_VERSION) }
   puts "✅ You’re using Ruby #{ACTUAL_RUBY_VERSION}. You’re all set!"
   exit(0)
 else
@@ -73,8 +85,8 @@ else
   end
 end
 
-puts "💎 Install Ruby #{REQUIRED_RUBY_VERSION} with `#{RUBY_VERSION_MANAGER_INSTALLATION_INSTRUCTIONS[ruby_version_manager_to_use]['install']}`"
-puts "💎 Switch to Ruby #{REQUIRED_RUBY_VERSION} with `#{RUBY_VERSION_MANAGER_INSTALLATION_INSTRUCTIONS[ruby_version_manager_to_use]['use']}`"
+puts "💎 Install Ruby #{PREFERRED_RUBY_VERSION} with `#{RUBY_VERSION_MANAGER_INSTALLATION_INSTRUCTIONS[ruby_version_manager_to_use]['install']}`"
+puts "💎 Switch to Ruby #{PREFERRED_RUBY_VERSION} with `#{RUBY_VERSION_MANAGER_INSTALLATION_INSTRUCTIONS[ruby_version_manager_to_use]['use']}`"
 puts "🔄 Run `bin/determinator` again to double-check you’re using the right Ruby version"
 
 exit(1)

script/rails/setup

@@ -1,6 +1,9 @@
 #!/bin/bash
+
+set -e
+
 cd rails
 ./bin/determinator
 gem install bundler
 bundle install
-bundle exec rake db:setup
+bundle exec rake db:setup