bundle/checker: enable typed: strict

[bittoby]

• Have you followed the guidelines in our Contributing document?
• Have you checked to ensure there aren't other open Pull Requests for the same change?
• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you written new tests (excluding integration tests) for your changes?
• Have you successfully run brew lgtm (style, typechecking and tests) with your changes locally?

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Bumps Library/Homebrew/bundle/checker.rb from # typed: true to # typed: strict. This finishes the directory-wide migration started in #21935, which left checker.rb and commands/exec.rb as the only two typed: true files remaining under Library/Homebrew/bundle/.

To satisfy strict mode the change also:

• adds sig blocks to the eight previously unsigned def self.* methods (check, apps_to_install, formulae_to_start, taps_to_tap, casks_to_install, formulae_to_install, registered_extensions_to_install, reset!);
• declares the module-level @dsl instance variable as T.nilable(Homebrew::Bundle::Dsl) in reset!; and
• adds raise ArgumentError, "dsl is unset!" unless @dsl before the three @dsl.entries accesses, mirroring the pattern already used in Library/Homebrew/bundle/commands/cleanup.rb.

No new tests: there is no behaviour change on the happy path. The new guard converts one specific misuse (calling a private check method without first invoking .check) from an opaque NoMethodError on nil into an explicit ArgumentError, matching the message used by cleanup.rb. The existing test/bundle/commands/check_spec.rb covers the public surface and continues to pass.

Verified locally:

• ./bin/brew typecheck : No errors
• ./bin/brew style --fix --changed : no offenses
• ./bin/brew tests --only=bundle/commands/check : 20 examples, 0 failures

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[bittoby]

Hi @MikeMcQuaid I opened first PR for this repository. Could you please review this? Welcome to any feedback. Thanks

[rexmhall09]

In case you were wondering, I think the docs job is failing because HTML-Proofer is getting 503s from existing Debian wiki links (wiki.debian.org/DFSGLicenses). I saw the same error on my PR, so it’s most likely an issue with the Debian wiki being temporarily unavailable.

[MikeMcQuaid]

Thanks, nice work!