Add --ruby option to brew sh

[Rylan12]

Sometimes I want to be able to interact with Homebrew ruby and bundle directly to do various things.

This PR adds a --ruby option to brew sh that starts an interactive shell with Homebrew's ruby and bundle set up so you can run bundle exec and other commands directly.

$ bundle exec rubocop --version
Source locally installed gems is ignoring #<Bundler::StubSpecification name=vernier version=1.9.0 platform=ruby> because it is missing extensions
Source locally installed gems is ignoring #<Bundler::StubSpecification name=stackprof version=0.2.27 platform=ruby> because it is missing extensions
Source locally installed gems is ignoring #<Bundler::StubSpecification name=ruby-prof version=1.7.2 platform=ruby> because it is missing extensions
Source locally installed gems is ignoring #<Bundler::StubSpecification name=redcarpet version=3.6.1 platform=ruby> because it is missing extensions
Source locally installed gems is ignoring #<Bundler::StubSpecification name=rbs version=4.0.0.dev.4 platform=ruby> because it is missing extensions
Source locally installed gems is ignoring #<Bundler::StubSpecification name=racc version=1.8.1 platform=ruby> because it is missing extensions
Source locally installed gems is ignoring #<Bundler::StubSpecification name=pycall version=1.5.2 platform=ruby> because it is missing extensions
Source locally installed gems is ignoring #<Bundler::StubSpecification name=prism version=1.6.0 platform=ruby> because it is missing extensions
Source locally installed gems is ignoring #<Bundler::StubSpecification name=json version=2.16.0 platform=ruby> because it is missing extensions
Source locally installed gems is ignoring #<Bundler::StubSpecification name=bigdecimal version=3.3.1 platform=ruby> because it is missing extensions
bundler: failed to load command: rubocop (/opt/homebrew/Library/Homebrew/vendor/bundle/ruby/3.4.0/bin/rubocop)
/Users/rylanpolster/.rbenv/versions/3.4.7/lib/ruby/gems/3.4.0/gems/bundler-4.0.0/lib/bundler/rubygems_integration.rb:236:in 'block in Gem.replace_bin_path': can't find executable rubocop for gem rubocop. rubocop is not currently included in the bundle, perhaps you meant to add it to your Gemfile? (Gem::Exception)
	from /Users/rylanpolster/.rbenv/versions/3.4.7/lib/ruby/site_ruby/3.4.0/rubygems.rb:237:in 'Gem.find_and_activate_spec_for_exe'
	from /Users/rylanpolster/.rbenv/versions/3.4.7/lib/ruby/site_ruby/3.4.0/rubygems.rb:318:in 'Gem.activate_bin_path'
	from /opt/homebrew/Library/Homebrew/vendor/bundle/ruby/3.4.0/bin/rubocop:25:in '<top (required)>'
	from /Users/rylanpolster/.rbenv/versions/3.4.7/lib/ruby/gems/3.4.0/gems/bundler-4.0.0/lib/bundler/cli/exec.rb:61:in 'Kernel.load'
	from /Users/rylanpolster/.rbenv/versions/3.4.7/lib/ruby/gems/3.4.0/gems/bundler-4.0.0/lib/bundler/cli/exec.rb:61:in 'Bundler::CLI::Exec#kernel_load'
	from /Users/rylanpolster/.rbenv/versions/3.4.7/lib/ruby/gems/3.4.0/gems/bundler-4.0.0/lib/bundler/cli/exec.rb:24:in 'Bundler::CLI::Exec#run'
	from /Users/rylanpolster/.rbenv/versions/3.4.7/lib/ruby/gems/3.4.0/gems/bundler-4.0.0/lib/bundler/cli.rb:494:in 'Bundler::CLI#exec'
	from /Users/rylanpolster/.rbenv/versions/3.4.7/lib/ruby/gems/3.4.0/gems/bundler-4.0.0/lib/bundler/vendor/thor/lib/thor/command.rb:28:in 'Bundler::Thor::Command#run'
	from /Users/rylanpolster/.rbenv/versions/3.4.7/lib/ruby/gems/3.4.0/gems/bundler-4.0.0/lib/bundler/vendor/thor/lib/thor/invocation.rb:127:in 'Bundler::Thor::Invocation#invoke_command'
	from /Users/rylanpolster/.rbenv/versions/3.4.7/lib/ruby/gems/3.4.0/gems/bundler-4.0.0/lib/bundler/vendor/thor/lib/thor.rb:538:in 'Bundler::Thor.dispatch'
	from /Users/rylanpolster/.rbenv/versions/3.4.7/lib/ruby/gems/3.4.0/gems/bundler-4.0.0/lib/bundler/cli.rb:35:in 'Bundler::CLI.dispatch'
	from /Users/rylanpolster/.rbenv/versions/3.4.7/lib/ruby/gems/3.4.0/gems/bundler-4.0.0/lib/bundler/vendor/thor/lib/thor/base.rb:584:in 'Bundler::Thor::Base::ClassMethods#start'
	from /Users/rylanpolster/.rbenv/versions/3.4.7/lib/ruby/gems/3.4.0/gems/bundler-4.0.0/lib/bundler/cli.rb:29:in 'Bundler::CLI.start'
	from /Users/rylanpolster/.rbenv/versions/3.4.7/lib/ruby/gems/3.4.0/gems/bundler-4.0.0/exe/bundle:28:in 'block in <top (required)>'
	from /Users/rylanpolster/.rbenv/versions/3.4.7/lib/ruby/gems/3.4.0/gems/bundler-4.0.0/lib/bundler/friendly_errors.rb:118:in 'Bundler.with_friendly_errors'
	from /Users/rylanpolster/.rbenv/versions/3.4.7/lib/ruby/gems/3.4.0/gems/bundler-4.0.0/exe/bundle:20:in '<top (required)>'
	from /Users/rylanpolster/.rbenv/versions/3.4.7/lib/ruby/site_ruby/3.4.0/rubygems.rb:303:in 'Kernel#load'
	from /Users/rylanpolster/.rbenv/versions/3.4.7/lib/ruby/site_ruby/3.4.0/rubygems.rb:303:in 'Gem.activate_and_load_bin_path'
	from /Users/rylanpolster/.rbenv/versions/3.4.7/bin/bundle:25:in '<main>'

$ brew sh --ruby --cmd='bundle exec rubocop --version'
1.81.7

[Copilot]

Pull request overview

This PR adds a new brew ruby-sh developer command that provides an interactive shell configured with Homebrew's Ruby environment, making it easier to work with Homebrew's development tools like RuboCop, Sorbet, and RSpec. It also fixes zsh shell configuration by ensuring .zshenv is properly symlinked when using custom ZDOTDIR settings.

• Adds ruby-sh command for interactive Ruby environment shell access
• Includes support for non-interactive execution via -c flag and file arguments
• Updates shell utility to symlink .zshenv for proper zsh environment initialization

Reviewed changes

Copilot reviewed 3 out of 4 changed files in this pull request and generated 2 comments.

File	Description
Library/Homebrew/dev-cmd/ruby-sh.rb	New command implementation that sets up Ruby environment and starts an interactive or non-interactive shell
Library/Homebrew/test/dev-cmd/ruby-sh_spec.rb	Basic test file covering argument parsing for the new command
Library/Homebrew/sorbet/rbi/dsl/homebrew/dev_cmd/ruby_sh.rbi	Auto-generated Sorbet type signatures for the RubySh command class
Library/Homebrew/utils/shell.rb	Adds .zshenv to the list of symlinked files when using custom ZDOTDIR to ensure proper zsh initialization

Files not reviewed (1)

• Library/Homebrew/sorbet/rbi/dsl/homebrew/dev_cmd/ruby_sh.rbi: Language not supported

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[carlocab]

There's a lot of overlap with brew sh here. Maybe we can just add an extra flag to brew sh to get the desired behaviour here?

Alternatively, we should consider extracting the common code between this and sh.rb elsewhere so they can remain identical in sh.rb and ruby-sh.rb.

[MikeMcQuaid]

There's a lot of overlap with brew sh here. Maybe we can just add an extra flag to brew sh to get the desired behaviour here?

@Rylan12 I agree with @carlocab here (good idea @carlocab!). A flag makes sense for that I think.

[Rylan12]

Good suggestion! I changed this to be a --ruby option to brew sh, instead

[MikeMcQuaid]

Looks good, thanks!