ci(tools): build, vet, and test the Go modules under tools/ - #1224
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Nothing did this. No workflow ran `go test` over any module under tools/, so the tests those modules carry had not executed since they were written and a pull request could break them and still go green. That is not hypothetical. tools/docs-version-sync is on main with three failing tests, all expecting bitnami-cassandra in the EA-CVE section where it is no longer classified. Either the data moved and the tests did not, or the classification changed and the expectation is stale. Neither is this change's to decide, so its tests are excluded with a reference to #1223 and the module is still built and vetted. Everything else is covered now rather than after that is resolved. Modules are discovered rather than listed, so a new tool is covered the moment it has a go.mod. A list would need editing by exactly the person least likely to think of it. Three details the first version got wrong, each found by running it: tools/go-toolchain has no source at all, deliberately, because rules_go's from_file requires a file named exactly go.mod. Building it errors with "matched no packages", which is not a failure, so a module with nothing to build is now recognised by having no packages rather than by name. The nested-test probe used a ** glob, and bash needs globstar for that and has it off by default, so a module whose tests sit one directory down looked like it had none. tools/byoo is exactly that shape. `go build ./...` writes each main package's executable into the working directory, which under -C is the module itself. Running the check left binaries behind and rewrote tools/changelog-site/changelog-site, which is committed. Output now goes to a scratch directory. Verified to fail, not merely to pass: a broken test in a covered module, a build break in the module whose tests are excluded, and a vet-only problem are each reported and exit non-zero, and a clean tree exits zero leaving nothing behind. Co-authored-by: Balaji Ganesan <bganesan@nvidia.com> Signed-off-by: Balaji Ganesan <bganesan@nvidia.com>
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Included review availability: Your plan provides up to 12 included reviews per hour; 10 remain after this review. 📝 WalkthroughWalkthroughThe pull request adds a Bash checker for Go modules under ChangesGo tools CI validation
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: ⚪ Minimal · up to This change adds CI validation for Go tools without introducing a concrete merge-blocking risk; it is merge-ready after normal checks and review. Sequence Diagram(s)sequenceDiagram
participant GithubActions as go-tools job
participant CheckScript as check-go-tools
participant GoModules as Go modules under tools
GithubActions->>CheckScript: run checker tests and validation
CheckScript->>GoModules: validate, build, vet, and test modules
GoModules-->>CheckScript: validation results
CheckScript-->>GithubActions: exit status
🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
Full details: Docstring CoverageExplanation No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0 files. (3 skipped: 3 unsupported.) ✨ Finishing Touches🧪 Generate unit tests (beta)
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Inline comments:
In `@tools/ci/check-go-tools`:
- Around line 47-115: The check-go-tools change lacks focused coverage. Add
tools/ci/test-check-go-tools using temporary Go module fixtures to verify
successful validation, declaration-only modules, module discovery failures,
excluded tests, and failing tests, including assertions for the relevant exit
statuses and output.
- Around line 68-72: Update the package-discovery logic in check-go-tools to
capture the exit status of go list -C "${m}" ./... and fail immediately when
discovery errors, rather than classifying the module as declaration-only; retain
declaration-only handling only for successful discovery with no packages, and
add a focused test covering the failed-discovery path.
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- Push a commit to this branch (recommended)
- Create a new PR with the fixes
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Two findings from review, both real. A module whose go.mod is malformed was reported as "ok, declaration only" and the check exited 0. `go list ./...` exits non-zero and prints nothing both for a module with no source and for one it cannot read, so testing its output or its status alone cannot tell them apart. `go mod edit -json` can: it succeeds on a valid go.mod with no source, and fails on a malformed one. A broken module passing silently is the exact failure this check exists to catch. The check had no committed test. tools/ci/test-check-go-tools adds nineteen assertions over fixture repositories rather than the real one, so they do not move when a tool is added under tools/. It covers a healthy module, a declaration-only module, a malformed go.mod, a failing test, a build break, a vet-only problem, a module with no tests, a test one directory down, an empty tools tree, and the check leaving no build output behind. Writing it found a third bug: `go build -o <dir> ./...` fails with "no main packages to build" on a library-only module, which is a perfectly valid shape under tools/. Every module there happens to have a main package today, so nothing surfaced it. Modules with a main package build to a scratch directory, and library-only modules get a plain build whose object output Go discards. Co-authored-by: Balaji Ganesan <bganesan@nvidia.com> Signed-off-by: Balaji Ganesan <bganesan@nvidia.com>
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Both findings addressed, and writing the tests found a third bug. Fail when package discovery fails — real, and it was the exact failure the check exists to catch. A module with a malformed
Add focused tests — Third bug, found by the tests — #1223 still tracks the excluded |
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Filed the committed-binary finding as #1240 ( |
Why
No workflow runs
go testover any module undertools/. Those modules' tests have not executed since they were written, so a PR can break them and CI stays green.Not hypothetical.
tools/docs-version-syncis onmainwith three failing tests, verified ata63032ccin a clean worktree:Found while wiring CI for #1213, #1215 and #1222 and noticing their tests would gate nothing.
What changed
tools/ci/check-go-toolsbuilds, vets, and tests every Go module undertools/, plus ago-toolsjob inbuild-test.yml.Modules are discovered from
go.mod, not listed, so a new tool is covered as soon as it exists. A list would need editing by whoever is least likely to think of it.Modules with no tests are still built and vetted, and the summary distinguishes the categories: "all passed" reads stronger than it is when some have nothing to run.
The one exclusion
tools/docs-version-synctests are excluded, referencing #1223 at the exclusion. Whether the data moved or the expectation is stale is for whoever owns that manifest. The module is still built and vetted, so a build or vet break there still fails.Resolving #1223 means deleting one line from
skip_tests.Testing
Verified to fail, not only to pass:
FAIL tools/ci-health: tests, exit 1FAIL tools/docs-version-sync: build, exit 1FAIL tools/ci-health: vet, exit 1Three bugs in the first version, each found by running it:
tools/go-toolchainhas no source, deliberately: rules_go'sfrom_filerequires a file named exactlygo.mod.go build ./...errors there with "matched no packages", which is not a failure. A module with nothing to build is now detected viago list, not special-cased by name.**glob. Bash needsglobstarand has it off by default, so a module whose tests sit one directory down looked like it had none.tools/byoois exactly that shape and was silently skipped.go build ./...writes each main package's executable into the working directory, which under-Cis the module itself. Output now goes to a scratch directory.tools/ci/check-go-versionandtools/ci/check-licenseboth pass.setup-gousesgo-version-file: tools/go-toolchain/go.mod, sincecheck-go-versionfails any workflow pinning a literal.Notes
Separate finding, not fixed here:
tools/changelog-site/changelog-siteis a committed ELF executable, 4,275,095 bytes, mode 100755. Runninggo buildin that directory rewrites it, which is how it surfaced. Looks like accidentally committed build output. Worth a follow-up togit rm --cachedand add a.gitignore; out of scope here.References
Files #1223 for the excluded module.
Related Merge Requests/Pull Requests
#1213, #1215, #1222 add the three Go tools whose tests this makes meaningful.
Dependencies
None
Github commit:
ci(tools): build, vet, and test the Go modules under tools/
Co-authored-by: Balaji Ganesan bganesan@nvidia.com
Summary by CodeRabbit
New Features
go.modchecks.Bug Fixes
Tests