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Add test-only resources for offline tests - #24173
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Copilot review overview
🟡 Changes recommended
One or more issues must be addressed before approval.
Review effort: Lite
Findings: 2
Open (2)
What changed in this PR
Adds test-only resource support so formula tests can prefetch fixtures before sandboxing and run offline.
Changes:
- Adds
:testresource declarations and filtering. - Fetches test resources in
brew test,brew fetch, and test-bot workflows. - Adds RuboCop migration support, documentation, completions, and coverage.
| File | Description |
|---|---|
| manpages/brew.1 | Updated as part of this pull request. |
| Library/Homebrew/test/test_bot/formulae_spec.rb | Updated as part of this pull request. |
| Library/Homebrew/test/test_bot/formulae_dependents_spec.rb | Updated as part of this pull request. |
| Library/Homebrew/test/software_spec_spec.rb | Updated as part of this pull request. |
| Library/Homebrew/test/rubocops/class/test_spec.rb | Updated as part of this pull request. |
| Library/Homebrew/test/language/python/virtualenv_spec.rb | Updated as part of this pull request. |
| Library/Homebrew/test/formula_spec.rb | Updated as part of this pull request. |
| Library/Homebrew/test/dev-cmd/test_spec.rb | Updated as part of this pull request. |
| Library/Homebrew/test/dependency_collector_spec.rb | Updated as part of this pull request. |
| Library/Homebrew/test/cmd/fetch_spec.rb | Updated as part of this pull request. |
| Library/Homebrew/test_bot/formulae.rb | Updated as part of this pull request. |
| Library/Homebrew/test_bot/formulae_dependents.rb | Updated as part of this pull request. |
| Library/Homebrew/sorbet/rbi/dsl/homebrew/cmd/fetch_cmd.rbi | Updated as part of this pull request. |
| Library/Homebrew/software_spec.rb | Updated as part of this pull request. |
| Library/Homebrew/rubocops/class.rb | Updated as part of this pull request. |
| Library/Homebrew/resource.rb | Updated as part of this pull request. |
| Library/Homebrew/language/python.rb | Updated as part of this pull request. |
| Library/Homebrew/formula.rb | Updated as part of this pull request. |
| Library/Homebrew/dev-cmd/test.rb | Updated as part of this pull request. |
| Library/Homebrew/dependency_collector.rb | Updated as part of this pull request. |
| Library/Homebrew/cmd/fetch.rb | Updated as part of this pull request. |
| docs/Manpage.md | Updated as part of this pull request. |
| docs/Formula-Cookbook.md | Updated as part of this pull request. |
| completions/zsh/_brew | Updated as part of this pull request. |
| completions/fish/brew.fish | Updated as part of this pull request. |
| completions/bash/brew | Updated as part of this pull request. |
Files not reviewed (1)
- Library/Homebrew/sorbet/rbi/dsl/homebrew/cmd/fetch_cmd.rbi: File type not supported
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🔵 Needs a closer look
One or more issues must be addressed before approval.
Review effort: Lite
Findings: None
Resolved since last review (2)
Files not reviewed (1)
- Library/Homebrew/sorbet/rbi/dsl/homebrew/cmd/fetch_cmd.rbi: File type not supported
chenrui333
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Oct 6, 2026
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No actionable comments were generated in the recent review. 🎉 ℹ️ Recent review info⚙️ Run configuration
📒 Files selected for processing (5)
Included review availability: This review used your included allowance. Your plan provides up to 10 included reviews per hour; 8 remain after this review. 📜 Recent review details⏰ Context from checks skipped due to timeout. (25)
🔇 Additional comments (5)
📝 WalkthroughWalkthroughThis change adds test-only formula resources, supports fetching them with ChangesTest-resource fetching
Priority: ⬇️ Low Estimated code review effort: 4 (Complex) | ~45 minutes Change: Feature Sequence Diagram(s)sequenceDiagram
participant BrewTest
participant Formula
participant DownloadQueue
participant TestSandbox
BrewTest->>Formula: enqueue_resources_and_patches(test: true)
BrewTest->>DownloadQueue: fetch queued test resources and patches
BrewTest->>TestSandbox: start after fetching
Suggested reviewers: Merge Risk: ⚪ Minimal · up to Failed fixture downloads stop the affected test attempt, and dependent checks do not fetch unused dependency test resources. No actionable merge-blocking risk remains. Security Architecture ReviewSecurity architecture risk: 🔵 Low · up to Test fixtures now download before tests enter the sandbox. Failed downloads block testing, and ordinary resource fetching remains separate. The added network activity warrants review, but the inspected changes do not establish an introduced security vulnerability. Retained concerns Security review detailsSecurity Blast Radius
Trust Boundaries and Controls
Resilience and Maintainability Implications
Hardening Proposals
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 18 functions across 20 files. (1 skipped: 1 unsupported.)
✨ Finishing Touches 💡 1📝 Generate docstrings 💡
🧪 Generate unit tests (beta)
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Actionable comments posted: 2
- 🪄 Fix CodeRabbit comments on this PR
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Inline comments:
Review comments at @Library/Homebrew/dev-cmd/test.rb:
- Line 81: Update the flow after `download_queue.fetch` to check
`download_queue.failed_downloads` and treat any nonempty list as a fetch
failure, returning or raising before the test sandbox starts.
Review comments at @Library/Homebrew/test_bot/formulae_dependents.rb:
- Line 434: Update fetch argument construction around fetch_args and
testable_dependents so dependency formulae in fetch_formulae are fetched without
--test, while the testable dependent alone is fetched with --test before
install_dependent tests it. Apply this separation in both bottle and
source-build paths, and update the corresponding fetch expectations in the
formulae_dependents_spec tests.
After applying the fix, consider running `coderabbit review --agent` for local
review. Visit https://docs.coderabbit.ai/cli?utm_source=ghpr
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- Plan: Advanced
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📒 Files selected for processing (27)
Library/Homebrew/cmd/fetch.rbLibrary/Homebrew/dependency_collector.rbLibrary/Homebrew/dev-cmd/test.rbLibrary/Homebrew/formula.rbLibrary/Homebrew/language/python.rbLibrary/Homebrew/resource.rbLibrary/Homebrew/rubocops/class.rbLibrary/Homebrew/software_spec.rbLibrary/Homebrew/sorbet/rbi/dsl/homebrew/cmd/fetch_cmd.rbiLibrary/Homebrew/test/cmd/fetch_spec.rbLibrary/Homebrew/test/dependency_collector_spec.rbLibrary/Homebrew/test/dev-cmd/test_spec.rbLibrary/Homebrew/test/formula_spec.rbLibrary/Homebrew/test/language/python/virtualenv_spec.rbLibrary/Homebrew/test/rubocops/class/test_resource_spec.rbLibrary/Homebrew/test/rubocops/class/test_spec.rbLibrary/Homebrew/test/software_spec_spec.rbLibrary/Homebrew/test/test_bot/formulae_dependents_spec.rbLibrary/Homebrew/test/test_bot/formulae_spec.rbLibrary/Homebrew/test_bot/formulae.rbLibrary/Homebrew/test_bot/formulae_dependents.rbcompletions/bash/brewcompletions/fish/brew.fishcompletions/zsh/_brewdocs/Formula-Cookbook.mddocs/Manpage.mdmanpages/brew.1
Included review availability: This review used your included allowance. Your plan provides up to 10 included reviews per hour; 9 remain after this review.
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📚 Code guidelines (1)
Generated by CodeRabbit — auto-discovered
📓 Path-based instructions (2)
Test command behavior and its observable effects, including stdout, stderr, exit status, and state changes as relevant.
📄 CodeRabbit inference engine (Generated by CodeRabbit)
Files:
Library/Homebrew/test/cmd/fetch_spec.rb
Implement CLI commands as `Homebrew::Cmd` classes inheriting from `AbstractCommand`; declare help text and argument metadata in `cmd_args`, and put command behavior in `run`.
📄 CodeRabbit inference engine (Generated by CodeRabbit)
Files:
Library/Homebrew/cmd/fetch.rb
🪛 ast-grep (0.45.3)
Library/Homebrew/rubocops/class.rb
[warning] 124-124: Found the use of an hardcoded passphrase for RSA. The passphrase can be easily discovered, and therefore should not be stored in source-code. It is recommended to remove the passphrase from source-code, and use system environment variables or a restricted configuration file.
Context: corrector.insert_before(range_with_comments_and_lines(test), "#{source}\n")
Note: [CWE-798]: Use of Hard-coded Credentials [OWASP A07:2021]: Identification and Authentication Failures
(hardcoded-secret-rsa-passphrase-ruby)
🔇 Additional comments (6)
Library/Homebrew/rubocops/class.rb (1)
74-132: LGTM!Library/Homebrew/test/rubocops/class/test_resource_spec.rb (1)
1-197: LGTM!Library/Homebrew/test/rubocops/class/test_spec.rb (1)
9-23: LGTM!manpages/brew.1 (1)
803-805: LGTM!Library/Homebrew/test_bot/formulae.rb (1)
685-685: LGTM!Library/Homebrew/test/test_bot/formulae_spec.rb (1)
1-1: LGTM!Also applies to: 5-5, 8-40
- Fetch test fixtures before sandboxing and stop if any fail so dependent tests can run without network access. - Fetch each tested formula's fixtures alongside its source or bottle without fetching fixtures for untested dependencies. - Offer static resource migration through a strict cop so existing taps keep passing ordinary style checks. - Leave declarations using runtime values for manual migration.
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test-botsource and bottle fetches so downloads can run in parallel.brew style --fix, leaving runtime-dependent declarations for manual migration.brew benchmarkresults.brewcommands to reproduce the bug?brew lgtm(style, typechecking and tests) locally?Codex with GPT 6 Astra at Extra High effort, with local review and testing.
Summary by CodeRabbit
brew fetch --testto download formula test resources and patches. This option cannot be used with--cask.brew testnow fetches test resources and patches before running tests, making them available in the sandbox. Testing workflows also fetch these resources.