Dev tooling: bin/console, bin/rake, debugger

Gemfile

@@ -1,4 +1,8 @@
-source 'https://rubygems.org'
+source "https://rubygems.org"
+
+if RUBY_VERSION >= "2.7"
+  gem "irb"
+  gem "debug"
+end
 
-# Specify your gem's dependencies in marcel.gemspec
 gemspec

bin/console

@@ -0,0 +1,10 @@
+#!/usr/bin/env ruby
+require "bundler/setup"
+require "irb"
+
+begin
+  require "debug"
+rescue LoadError
+end
+
+IRB.start

bin/rake

@@ -0,0 +1,5 @@
+#!/usr/bin/env ruby
+require "bundler/setup"
+require "rake"
+
+Rake.application.run

test/test_helper.rb

@@ -2,6 +2,11 @@
 require 'marcel'
 require 'pathname'
 
+begin
+  require 'debug'
+rescue LoadError
+end
+
 class Marcel::TestCase < Minitest::Test
   class << self
     def setup(&block)