chore(deps): upgrade to Go 1.27.1, align Kubernetes on 1.37, and refresh devcontainer tooling - #337
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…esh devcontainer tooling Includes Dependabot's golang 1.27.1 base-image bump (PR #335), which this branch supersedes. Go 1.27.1 everywhere: both Dockerfiles by digest, the mutation-lab fixture image, and the go directive. /test/mutationlab was missing from Dependabot's docker `directories:` list, which is why it alone sat on 1.27.0 — it is listed now. Kubernetes was already on 1.37 where it counts (k8s.io/api and client-go came with the last go-dependencies bump), but the rest had not followed: controller-runtime was still v0.24.1, which targets 1.36, and apiextensions-apiserver still v0.36.4. Both move to the 1.37 pair (controller-runtime v0.25.0). ENVTEST_K8S_VERSION needed no edit — it derives itself from k8s.io/api, so unit tests were already on 1.37 while the README still claimed 1.36. The e2e cluster stays on 1.36 because k3s has no stable 1.37 release yet, only release candidates; it moves to the newest 1.36 patch instead (v1.36.1 -> v1.36.4-k3s1). The README now states both versions rather than claiming one. Docs that RECORD a measurement against 1.36.1 — docs/facts/*, the mutation-lab corpus, the audit-behaviour notes — keep their numbers, because there the number is the observation. go.mod was untidy: k8s.io/apiextensions-apiserver was marked `// indirect` while internal/controller imports it directly. Nothing gated tidiness, so `lint-gomod` now does, via `go mod tidy -diff`. Fixes a flaky envtest, TestRenamedRequiredField_StoredObjectCanAdoptIt. Its wait for the narrowed schema keyed on a ref-less create being REJECTED, but the surgery renames the required field rather than dropping it, so that is true under both schemas. The wait returned on its first probe, before the apiserver served the new schema, and the assertion then ran against the old one. It now waits for a create carrying gitProviderRef to SUCCEED, which only the narrowed schema allows. The mechanism is the evidence: measured against a live apiserver, the old signal is rejected under the widened schema as well as the narrowed one, so it could not discriminate at all. A contended stress run reproduced CI's exact error once in 48; a second, idler 96-run round did not reproduce it. Hence the fix rests on the mechanism rather than on the sampling. controller-gen v0.22.0 changes only the version stamp it writes into the CRDs; the schemas are byte-identical. The bases are regenerated so the committed tree matches what the rebuilt container produces. Devcontainer tools refreshed: kubectl v1.37.0, golangci-lint v2.13.2, flux 2.9.5, flux-operator 0.59.0, valkey 9.1.2, oras 1.3.4, trivy 0.74.0, vale 3.20.0, controller-gen v0.22.0, setup-envtest v0.25.0, scc v4.0.0. Vale 3.20.0 was checked to produce byte-identical output on the gated scope. staticcheck is left alone: its "2026.2.1" release resolves to v0.8.1, which is already pinned. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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📝 WalkthroughWalkthroughThe change updates Go and Kubernetes tooling, module dependencies, generated CRD metadata, module linting, Docker update coverage, schema validation tests, and Kubernetes test environment versions. ChangesToolchain and validation refresh
Estimated code review effort: 3 (Moderate) | ~25 minutes Merge Risk: 🔵 Low · up to The lint command now includes a Go module tidiness check, but its task overview does not document that component. This is a bounded documentation mismatch with no identified runtime or data-impact risk. 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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In `@Taskfile-build.yml`:
- Line 213: Update the documented task lint components in tasks-overview.md to
include lint-gomod, matching the dependency declared by the lint task. Preserve
the existing documented components and ordering.
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.devcontainer/Dockerfile.github/dependabot.ymlDockerfileREADME.mdTaskfile-build.ymlconfig/crd/bases/configbutler.ai_clusterproviders.yamlconfig/crd/bases/configbutler.ai_clusterwatchrules.yamlconfig/crd/bases/configbutler.ai_commitrequests.yamlconfig/crd/bases/configbutler.ai_gitproviders.yamlconfig/crd/bases/configbutler.ai_gittargets.yamlconfig/crd/bases/configbutler.ai_watchrules.yamlgo.modinternal/controller/renamed_required_field_test.gotest/e2e/cluster/start-cluster.shtest/mutationlab/Dockerfile
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The overview described four linters. `task lint` has six deps: `lint-docs` was already missing before this branch, and `lint-gomod` is new. Fixes the summary table, the DAG, and the prose, which each carried the stale list. Turns the one em dash in the rewritten sentence into a colon, per the style guide. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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Supersedes #335, whose golang 1.27.1 base-image bump is included here.
Go 1.27.1
Both Dockerfiles (by digest), the mutation-lab fixture image, and the
godirective.
/test/mutationlabwas missing from Dependabot's dockerdirectories:list — which is exactly why it alone sat on 1.27.0 while the othertwo were bumped. It is listed now, so it stops drifting.
Kubernetes aligned on 1.37
Kubernetes was already on 1.37 where it counts:
k8s.io/apiandclient-gocameacross with the last go-dependencies bump. The rest had not followed —
controller-runtimewas still v0.24.1, which targets 1.36, andapiextensions-apiserverstill v0.36.4. Both move to the matching 1.37 pair(
controller-runtimev0.25.0, verified against that release's own go.mod).ENVTEST_K8S_VERSIONneeded no edit: it derives itself fromk8s.io/api. Unittests were therefore already running on envtest 1.37 while the README claimed
1.36 — that gap is what this closes.
The e2e cluster stays on 1.36, because k3s has no stable 1.37 release yet,
only release candidates. It moves to the newest 1.36 patch instead
(
v1.36.1→v1.36.4-k3s1). The README now states both versions rather thanclaiming one:
Docs that record a measurement against 1.36.1 —
docs/facts/*, themutation-lab corpus, the audit-behaviour notes — keep their numbers. There the
number is the observation, so rewriting it without re-running the measurement
would make it false.
go.mod hygiene, now gated
k8s.io/apiextensions-apiserverwas marked// indirectwhileinternal/controllerimports it directly. Nothing gated tidiness, so it driftedunnoticed.
lint-gomodnow checks it viago mod tidy -diff(reports drift,exits non-zero, mutates nothing) and is wired into
task lint. Verified in bothdirections: re-introducing that exact drift fails the gate.
Flaky test fixed
TestRenamedRequiredField_StoredObjectCanAdoptItfailed CI on #335. Its wait forthe narrowed schema keyed on a ref-less create being rejected — but the
schema surgery renames the required field rather than dropping it, so a
ref-less object is refused under both schemas. The wait returned on its first
probe, before the apiserver's CR handler had picked up the new schema, and the
migration assertion then ran against the old one.
It now waits for a create carrying
gitProviderRefto succeed, which only thenarrowed schema allows, and checks the "still required" claim after that wait,
where it discriminates.
The mechanism is the evidence: measured against a live apiserver, the old signal
is rejected under the widened schema as well as the narrowed one, so it could not
discriminate at all. A contended stress run reproduced CI's exact error once in
48 runs; a second, idler 96-run round did not reproduce it. The fix therefore
rests on the mechanism, not on the sampling.
Devcontainer refresh
kubectl v1.37.0, golangci-lint v2.13.2, flux 2.9.5, flux-operator 0.59.0, valkey
9.1.2, oras 1.3.4, trivy 0.74.0, vale 3.20.0, controller-gen v0.22.0,
setup-envtest v0.25.0, scc v4.0.0. Everything else was already current.
controller-genv0.22.0 changes only the version stamp it writes into theCRDs — schemas are byte-identical. The bases are regenerated so the committed
tree matches what the rebuilt container produces.
vale3.20.0 was run against the gated scope: byte-identical output to 3.18.0.staticcheckis deliberately unchanged — its "2026.2.1" release resolves tov0.8.1, which is already pinned.Validation
task lintandtask testpass on this branch.task test-e2epassed(84/84) on the pre-rebase tree carrying the same upgrade, against a
v1.36.4-k3s1cluster; CI covers the final tree.Note:
trivy0.74.0 is the one bump not verifiable locally — a newer scanner cansurface new CVEs, so the image-scan job is the real check.
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Summary by CodeRabbit
Documentation
Bug Fixes
Quality Improvements