Port Homebrew::Cmd::Developer

Library/Homebrew/cmd/developer.rb

@@ -1,56 +1,55 @@
-# typed: true
+# typed: strict
 # frozen_string_literal: true
 
-require "cli/parser"
+require "abstract_command"
 
 module Homebrew
-  module_function
+  module Cmd
+    class Developer < AbstractCommand
+      cmd_args do
+        description <<~EOS
+          Control Homebrew's developer mode. When developer mode is enabled,
+          `brew update` will update Homebrew to the latest commit on the `master`
+          branch instead of the latest stable version along with some other behaviour changes.
 
-  sig { returns(CLI::Parser) }
-  def developer_args
-    Homebrew::CLI::Parser.new do
-      description <<~EOS
-        Control Homebrew's developer mode. When developer mode is enabled,
-        `brew update` will update Homebrew to the latest commit on the `master`
-        branch instead of the latest stable version along with some other behaviour changes.
+          `brew developer` [`state`]:
+          Display the current state of Homebrew's developer mode.
 
-        `brew developer` [`state`]:
-        Display the current state of Homebrew's developer mode.
+          `brew developer` (`on`|`off`):
+          Turn Homebrew's developer mode on or off respectively.
+        EOS
 
-        `brew developer` (`on`|`off`):
-        Turn Homebrew's developer mode on or off respectively.
-      EOS
-
-      named_args %w[state on off], max: 1
-    end
-  end
-
-  def developer
-    args = developer_args.parse
-
-    env_vars = []
-    env_vars << "HOMEBREW_DEVELOPER" if Homebrew::EnvConfig.developer?
-    env_vars << "HOMEBREW_UPDATE_TO_TAG" if Homebrew::EnvConfig.update_to_tag?
-    env_vars.map! do |var|
-      "#{Tty.bold}#{var}#{Tty.reset}"
-    end
-
-    case args.named.first
-    when nil, "state"
-      if env_vars.any?
-        puts "Developer mode is enabled because #{env_vars.to_sentence} #{(env_vars.count == 1) ? "is" : "are"} set."
-      elsif Homebrew::Settings.read("devcmdrun") == "true"
-        puts "Developer mode is enabled."
-      else
-        puts "Developer mode is disabled."
+        named_args %w[state on off], max: 1
+      end
+
+      sig { override.void }
+      def run
+        env_vars = []
+        env_vars << "HOMEBREW_DEVELOPER" if Homebrew::EnvConfig.developer?
+        env_vars << "HOMEBREW_UPDATE_TO_TAG" if Homebrew::EnvConfig.update_to_tag?
+        env_vars.map! do |var|
+          "#{Tty.bold}#{var}#{Tty.reset}"
+        end
+
+        case args.named.first
+        when nil, "state"
+          if env_vars.any?
+            verb = (env_vars.count == 1) ? "is" : "are"
+            puts "Developer mode is enabled because #{env_vars.to_sentence} #{verb} set."
+          elsif Homebrew::Settings.read("devcmdrun") == "true"
+            puts "Developer mode is enabled."
+          else
+            puts "Developer mode is disabled."
+          end
+        when "on"
+          Homebrew::Settings.write "devcmdrun", true
+        when "off"
+          Homebrew::Settings.delete "devcmdrun"
+          puts "To fully disable developer mode, you must unset #{env_vars.to_sentence}." if env_vars.any?
+        else
+          raise UsageError, "unknown subcommand: #{args.named.first}"
+        end
       end
-    when "on"
-      Homebrew::Settings.write "devcmdrun", true
-    when "off"
-      Homebrew::Settings.delete "devcmdrun"
-      puts "To fully disable developer mode, you must unset #{env_vars.to_sentence}." if env_vars.any?
-    else
-      raise UsageError, "unknown subcommand: #{args.named.first}"
     end
   end
 end

Library/Homebrew/test/cmd/developer_spec.rb

@@ -1,7 +1,8 @@
 # frozen_string_literal: true
 
+require "cmd/developer"
 require "cmd/shared_examples/args_parse"
 
-RSpec.describe "brew developer" do
+RSpec.describe Homebrew::Cmd::Developer do
   it_behaves_like "parseable arguments"
 end