dev-cmd/tests: add except flag to skip tests

[cho-m]

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Will likely use this to bypass any remaining test failures in portable Ruby PR to fix up our workflows. Many failures seem to be environment differences that are difficult to reconcile (e.g. Tier 3 vs Tier 1, container setup, etc).

Flag name was chosen based on brew audit which also has --only and --except.

The handling is based as --only flag (other than not providing line number support):

brew/Library/Homebrew/dev-cmd/tests.rb

Lines 76 to 82 in 85c5ba0

	only.split(",").flat_map do |test|
	test_name, line = test.split(":", 2)
	tests = if line.present?
	parallel = false
	["test/#{test_name}_spec.rb:#{line}"]
	else
	Dir.glob("test/{#{test_name},#{test_name}/**/*}_spec.rb")

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Needed to manually update RBI as brew tc --update kept failing with stacktrace.

[Copilot]

Pull request overview

Adds an --except flag to brew tests to allow skipping specific test specs or directories, mirroring the existing --only selection behavior and updating Sorbet RBI accordingly.

Changes:

• Add --except= CLI flag to brew tests and exclude matching spec files/directories from the run list.
• Update option conflict rules to prevent combining --except with --changed/--only.
• Extend the Sorbet DSL RBI for Homebrew::DevCmd::Tests::Args with the new except accessor.

Reviewed changes

Copilot reviewed 1 out of 2 changed files in this pull request and generated 3 comments.

File	Description
Library/Homebrew/dev-cmd/tests.rb	Adds --except flag parsing and applies exclusions to the computed RSpec file list.
Library/Homebrew/sorbet/rbi/dsl/homebrew/dev_cmd/tests.rbi	Updates the generated RBI to include args.except typing.

Files not reviewed (1)

• Library/Homebrew/sorbet/rbi/dsl/homebrew/dev_cmd/tests.rbi: File type not supported

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[Copilot]

Pull request overview

Copilot reviewed 6 out of 7 changed files in this pull request and generated 2 comments.

Files not reviewed (1)

• Library/Homebrew/sorbet/rbi/dsl/homebrew/dev_cmd/tests.rbi: File type not supported

[MikeMcQuaid]

Thanks! I'm not sure this really makes sense as an approach, though. Instead can we skip those environments/tests where we're getting failures.

It also might be that it doesn't make sense to run brew tests for Portable Ruby when building in non-Tier 1 environments or we use --only to run a small subset instead.

[cho-m]

Closing in favor of:

• test_bot/formulae: only run subset of brew tests for portable Ruby #23113