regen-java-models-from-upstream

name	regen-java-models-from-upstream
description	Bump a Go dependency from a failing Dependabot PR in the Kubernetes model generator, adapt the generator to upstream Go API changes, regenerate Java models, fix Java compilation, update CHANGELOG, and open a PR that closes the Dependabot one.
argument-hint	<dependabot-pr-number>
disable-model-invocation	true
allowed-tools	Read, Edit, Write, Grep, Glob, Bash, AskUserQuestion, Agent

Go Dependency Bump

You are performing a Go dependency bump for the Fabric8 Kubernetes Client project. The user provides a Dependabot PR number. Your job is to bump the dependency, regenerate models, fix any issues, and create a clean PR that closes the Dependabot one. The user may already be on a dedicated branch (e.g., in a git worktree) — detect this and skip branch creation if so.

ultrathink

Pre-fetched Context

!`${CLAUDE_SKILL_DIR}/scripts/get-dep-context.sh $0`

Step 1: Analyze the Dependabot PR

From the context above, extract:

• Single-dep or grouped PR? — see below.
• Go module path(s) (e.g., sigs.k8s.io/kustomize/api)
• Old version and new version for each dep
• CI failure details — understand what failed and why

Single-dep vs grouped PR

Dependabot groups are configured in .github/dependabot.yml (e.g., kubernetes, openshift, knative, opentelemetry, golang-x, operator-framework, etc.). When a group has multiple eligible updates, Dependabot opens a single PR for the whole group.

Signals of a grouped PR:

• Title like chore(deps): bump the <group-name> group in /... with N updates
• Branch like dependabot/go_modules/.../<group-name>-<hash>
• PR body lists multiple Updates ... blocks

Extract the group name and the full list of (module, old, new) tuples from the PR body. All subsequent steps (branch, CHANGELOG, commit, PR) must reflect every dep in the group.

Classify the failure:

1. Model drift — make generate-model produces different output than what's committed (most common, the "Check No Schema file modified" step fails)
2. Go compilation error — the Go code itself fails to build (breaking API changes in the dependency)
3. Java compilation error — generated Java models fail to compile (rare, usually type mapping issues)
4. Transitive dependency conflict — go mod tidy fails or runtime conflicts exist

Present your analysis and the plan to the user. Wait for confirmation via AskUserQuestion before proceeding.

Step 2: Prepare Working Branch

First, check the current branch:

git branch --show-current

• If already on a non-main branch (e.g., in a git worktree prepared for this task): use the current branch as-is. Do NOT create a new branch or switch to main.
• If on main: create a new branch:

git pull --rebase origin main
git checkout -b chore/bump-<short-dep-name>-<new-version>

Use a short, readable name for the dependency (e.g., kustomize-api-0.21.1, gateway-api-1.5.0, cert-manager-1.20.0).

For grouped PRs, name the branch after the group and the shared target version when there is one (e.g., chore/bump-kubernetes-0.36.0, chore/bump-opentelemetry-1.43.0). If there is no single shared version, just use the group name (e.g., chore/bump-knative-group).

Step 3: Bump the Dependency

3a. Update go.mod

cd kubernetes-model-generator/openapi/generator
go get <module-path>@v<new-version>

For grouped PRs, run go get for every module in the group, each at its target version. Do this in one invocation when possible (go get foo@v1 bar@v2 baz@v3) so the solver resolves them together.

3b. Check for related dependencies that may need bumping

Some dependencies are coupled. Common patterns:

• cluster-api-provider-metal3 often requires bumping sigs.k8s.io/cluster-api and related replace directives
• knative components may need knative.dev/pkg pinned via replace directive
• OpenShift components are pinned to specific release branches

Review the Go error output and go.mod replace directives to determine if related dependencies need updating.

3c. Handle replace directives

Check if the dependency (or any of its transitive dependencies) conflicts with existing replace directives in go.mod. The file has two replace blocks:

1. Version convergence — forces compatible versions across OpenShift/K8s ecosystem
2. Dependabot workarounds — forces pseudo-versions for modules where Dependabot picks invalid tagged major versions

If a new replace directive is needed, add it to the appropriate block with a comment explaining why.

3d. Tidy

go mod tidy

If go mod tidy fails, analyze the error. Common fixes:

• Add a replace directive to pin a conflicting transitive dependency
• Bump a related dependency to a compatible version

3e. Return to project root

cd /path/to/kubernetes-client

Step 4: Generate Models

Run from the project root:

make generate-model

IMPORTANT: This is a long-running command (~10-15 minutes). Run it with a suitable timeout (600000ms). Do NOT cancel it.

CRITICAL: Always use make generate-model from the project root. NEVER build the Go binary manually or run generator commands individually.

If model generation fails

Common issues and fixes:

Go compilation errors

• A type was renamed/removed in the new dependency version
• Fix: update references in Go code (e.g., cmd/reflection.go, pkg/packages/packages.go, pkg/openapi/openapi-gen-processors.go)
• After fixing, re-run make generate-model

Java compilation errors

• Generated Java code references a type that no longer exists
• Fix: may need refToJavaTypeMappings in the relevant module's pom.xml, or import path updates
• After fixing, re-run make generate-model

Generator logic issues

• New upstream patterns (nested inline embeds, new protobuf patterns) not handled by the generator
• Fix: update processor code in kubernetes-model-generator/openapi/generator/pkg/openapi/openapi-gen-processors.go
• After fixing, re-run make generate-model

Step 5: Check for Additional Issues

5a. Integration test expected files

Check if integration test .expected files need updating:

# These are in:
# kubernetes-model-generator/openapi/maven-plugin/src/it/*/expected/

If the generated output changed for types covered by these expected files, update them to match.

5b. Stale references in non-generated code

Search for references to types that may have been deleted or renamed:

# Look for compilation errors or stale references

If the upstream dependency renamed/reorganized packages, you may need to:

• Update import paths in Go code (cmd/reflection.go)
• Add type mappings in Maven pom.xml (refToJavaTypeMappings)
• Update package patterns in pkg/packages/packages.go

5c. Verify Java compilation

mvn clean install -DskipTests -T 1C 2>&1 | tail -50

If specific modules fail, build just those modules to get clearer error messages:

mvn clean install -pl <failing-module> -am -DskipTests -T 1C

Step 6: Update CHANGELOG

Edit CHANGELOG.md and add entries under the ### 7.7-SNAPSHOT section (or whatever the current SNAPSHOT version is).

IMPORTANT — Alphabetical ordering: Insert all entries in alphabetical order by dependency/topic name within each section. This is critical for avoiding merge conflicts when multiple dependency bumps run in parallel — each entry lands at a deterministic position, allowing Git to auto-merge.

Use PLACEHOLDER — the real PR number is not known yet.

Dependency Upgrade entry (always)

Under #### Dependency Upgrade, insert in alphabetical order by the readable dependency name:

* Fix #PLACEHOLDER: bump <readable-dep-name> from <old-version> to <new-version>

For example, "bump cert-manager..." goes before "bump gateway-api..." which goes before "bump tekton...".

For grouped PRs, emit one entry per dep in the group, each in its own alphabetical position. Use the same #PLACEHOLDER for all of them — they all resolve to the single fix PR number in Step 10.

Bug fix entry (if generator code was fixed)

Under #### Bugs, insert in alphabetical order by topic:

* Fix #PLACEHOLDER: <description of what was fixed in the generator>

Breaking changes entry (if applicable)

Under #### _**Note**_: Breaking changes, insert in alphabetical order by module/topic. Add entries for:

• Removed model classes
• Renamed/moved packages
• Changed type hierarchies

Format:

* Fix #PLACEHOLDER: <module> model `<ClassName>` removed
* Fix #PLACEHOLDER: <module> model classes moved from package `old.package` to `new.package`

Identifying breaking changes

Compare the generated schemas before and after. Key indicators:

• Files deleted from src/generated/java/ directories
• Package path changes in generated classes
• Type renames visible in the OpenAPI schema diff

Step 7: Format Code

make format

Step 8: Commit

Stage all changes and create a single commit:

chore(deps): bump <readable-dep-name> from <old-version> to <new-version>

<Optional: explanation of special handling — replace directives, generator fixes, cascade bumps>

Closes #<dependabot-pr-number>

IMPORTANT: Include Closes #<dependabot-pr-number> to auto-close the Dependabot PR.

For grouped PRs, use a group-level subject and list each dep in the body:

chore(deps): bump the <group-name> group

- <module-path> from <old> to <new>
- <module-path> from <old> to <new>
- ...

Closes #<dependabot-pr-number>

Step 9: Push and Create PR

Push the branch and create the PR:

git push -u origin <branch-name>

Create the PR with gh pr create. The PR body format:

gh pr create --repo fabric8io/kubernetes-client --title "chore(deps): bump <dep> from <old> to <new>" --body "$(cat <<'EOF'
## Summary
<1-3 bullet points describing what changed>

Closes #<dependabot-pr-number>
EOF
)"

For grouped PRs, mirror the commit style — title chore(deps): bump the <group-name> group, body ## Summary lists each <module-path> from <old> to <new> as bullets, and closes the single Dependabot group PR.

IMPORTANT: Do NOT include a "Test plan" section or "Generated with Claude Code" footer in the PR body.

Step 10: Update CHANGELOG with Real PR Number

After the PR is created, you'll have the real PR number. Update CHANGELOG.md:

1. Replace all PLACEHOLDER references for this bump with the actual PR number
2. Commit the update:

chore: update CHANGELOG with PR #<pr-number> reference

3. Push the update.

Reference: Project Structure

Key files you may need to read or modify:

File	Purpose
kubernetes-model-generator/openapi/generator/go.mod	Go dependency versions and replace directives
kubernetes-model-generator/openapi/generator/go.sum	Go dependency checksums (auto-managed)
kubernetes-model-generator/openapi/generator/cmd/reflection.go	Reflection-based schema generation (type lists, import paths)
kubernetes-model-generator/openapi/generator/cmd/openapi.go	OpenAPI schema generation (module definitions)
kubernetes-model-generator/openapi/generator/pkg/packages/packages.go	Package glob patterns for each API group
kubernetes-model-generator/openapi/generator/pkg/openapi/openapi-gen-processors.go	Field/package processors (handles inline embeds, protobuf, etc.)
kubernetes-model-generator/openapi/generator/pkg/openapi/openapi-gen.go	Main generator orchestration
kubernetes-model-generator/openapi/generator/pkg/parser/parser.go	Extracts fabric8 metadata from Go types
kubernetes-model-generator/openapi/schemas/*.json	Generated OpenAPI schemas
kubernetes-model-generator/openapi/maven-plugin/src/it/*/expected/	Integration test expected output
CHANGELOG.md	Release changelog

Reference: Common Dependency Relationships

Dependency	Often requires
cluster-api-provider-metal3	Bumping sigs.k8s.io/cluster-api, sigs.k8s.io/cluster-api-provider-azure, update replace directives
knative.dev/eventing-*	May need knative.dev/pkg replace directive pinned
tektoncd/*	Usually straightforward
cert-manager	Usually straightforward
prometheus-operator	May expose inline embed edge cases in generator
openshift/*	Pinned to release branches via replace directives
sigs.k8s.io/kustomize/*	May need sigs.k8s.io/kustomize/kyaml bumped together