Update how to integrate in irbrc

.github/dependabot.yml

@@ -20,6 +20,8 @@ updates:
         patterns:
           - '*rubocop*'
   - package-ecosystem: 'bundler'
+    # For feature dependedncy updates,
+    # Keep this definition even if the /gemfiles/oldest/Gemfile is completely same as /Gemfile
     directory: '/gemfiles/oldest'
     schedule:
       interval: 'weekly'

README.md

@@ -46,28 +46,6 @@ $ irb
 
 Then you can use `pa` as an IRB command.
 
-```ruby
-irb(main):001:0> pa %q{ "0".class == "3".to_i.times.map {|i| i + 1 }.class }
-result: false
-
- "0".class == "3".to_i.times.map {|i| i + 1 }.class
-     |     |      |    |     |                |
-     |     |      |    |     |                Array
-     |     |      |    |     [1, 2, 3]
-     |     |      |    #<Enumerator: ...>
-     |     |      3
-     |     false
-     String
-=> nil
-```
-
-The `pa` just takes strings of the code.
-
-If you want to directly pass `expression`, [.irbrc](examples/.irbrc) is the hack for single line code.\
-if you don't have the file yet, putting the file as one of your `$IRBRC`, `$XDG_CONFIG_HOME/irb/irbrc` or `$HOME/.irbrc`
-
-Then you can use the `pa` as below...
-
 ```ruby
 irb(main):001:0> pa "0".class == "3".to_i.times.map {|i| i + 1 }.class
 result: false
@@ -83,8 +61,11 @@ result: false
 => nil
 ```
 
+No hack is needed in your irbrc, thank you irb developers!
+
 ## References
 
 - [power-assert-js/power-assert](https://github.com/power-assert-js/power-assert)
 - [Power Assert in Ruby](https://speakerdeck.com/k_tsj/power-assert-in-ruby)
 - [ja - IRB is new than Pry](https://k0kubun.hatenablog.com/entry/2021/04/02/211455)
+- [Support command registration](https://github.com/ruby/irb/pull/886)

gemfiles/oldest/Gemfile

@@ -15,6 +15,6 @@ group :test do
   gem 'test-unit', '~> 3.6.2'
   gem 'warning', '~> 1.3.0'
 
-  gem 'irb', '1.12.0'
+  gem 'irb', '1.13.0'
   gem 'power_assert', '2.0.3'
 end

irb-power_assert.gemspec

@@ -21,7 +21,7 @@ Gem::Specification.new do |gem|
     'rubygems_mfa_required' => 'true',
   }
 
-  gem.add_runtime_dependency 'irb', '>= 1.12.0', '< 2.0'
+  gem.add_runtime_dependency 'irb', '>= 1.13.0', '< 2.0'
   gem.add_runtime_dependency 'power_assert', '>= 2.0.3', '< 3.0'
 
   gem.required_ruby_version = '>= 3.2'

lib/irb/cmd/pa.rb

@@ -19,13 +19,5 @@ def execute(expression)
     end
   end
 
-  if ::IRB::Command.respond_to?(:register)
-    Command.register(:pa, PaCommand)
-  else
-    Command::Pa = PaCommand
-
-    module ExtendCommandBundle
-      def_extend_command(:irb_pa, :Pa, __FILE__, [:pa, NO_OVERRIDE])
-    end
-  end
+  Command.register(:pa, PaCommand)
 end

test/test_irb_power_assert.rb

@@ -35,23 +35,10 @@ def test_typical_example
     EOD
 
     out, err = capture_output do
-      if ::IRB::Command.respond_to?(:register)
-        # Since ruby 3.4 (or newer irb gem), no need irbrc hack to realize `pa exp` instead of `pa 'exp'`
-        execute_lines(%q{pa "0".class == "3".to_i.times.map {|i| i + 1 }.class})
-      else
-        IRB.setup(__FILE__, argv: [])
-        IRB.conf[:USE_MULTILINE] = true
-        IRB.conf[:USE_SINGLELINE] = false
-        IRB.conf[:VERBOSE] = false
-        workspace = IRB::WorkSpace.new(self)
-        irb = IRB::Irb.new(workspace)
-        IRB.conf[:MAIN_CONTEXT] = irb.context
-
-        irb.context.main.irb_pa(%q{"0".class == "3".to_i.times.map {|i| i + 1 }.class})
-      end
+      execute_lines(%q{pa "0".class == "3".to_i.times.map {|i| i + 1 }.class})
     end
 
     assert_equal('', err)
-    assert_equal((::IRB::Command.respond_to?(:register) ? expected + "=> nil\n" : expected), out)
+    assert_equal(expected + "=> nil\n", out)
   end
 end