Add API reference docs generation

.github/workflows/check-codegen.yml

@@ -16,10 +16,12 @@ jobs:
         go-version-file: 'go.mod'
     - name: Run make generate
       run: make generate
+    - name: Run make docs
+      run: make docs
     - name: Compare the expected and actual generated/* directories
       run: |
         if [ "$(git diff --ignore-space-at-eol client-go/ | wc -l)" -gt "0" ]; then
-          echo "Detected uncommitted changes after build. Consider running 'make generate'."
+          echo "Detected uncommitted changes after build. Consider running 'make generate && make docs'."
           echo "See status below:"
           git diff
           exit 1

Makefile

@@ -101,6 +101,10 @@ lint-fix: golangci-lint ## Run golangci-lint linter and perform fixes
 
 ##@ Build
 
+.PHONY: docs
+docs: gen-crd-api-reference-docs ## Run go generate to generate API reference documentation.
+	$(GEN_CRD_API_REFERENCE_DOCS) -api-dir ./api/v1alpha1 -config ./hack/api-reference/config.json -template-dir ./hack/api-reference/template -out-file ./docs/api-reference/api.md
+
 .PHONY: build
 build: manifests generate fmt vet ## Build manager binary.
 	go build -o bin/manager cmd/manager/main.go
@@ -184,13 +188,15 @@ CONTROLLER_GEN ?= $(LOCALBIN)/controller-gen-$(CONTROLLER_TOOLS_VERSION)
 ENVTEST ?= $(LOCALBIN)/setup-envtest-$(ENVTEST_VERSION)
 GOLANGCI_LINT = $(LOCALBIN)/golangci-lint-$(GOLANGCI_LINT_VERSION)
 GOIMPORTS ?= $(LOCALBIN)/goimports-$(GOIMPORTS_VERSION)
+GEN_CRD_API_REFERENCE_DOCS ?= $(LOCALBIN)/gen-crd-api-reference-docs-$(GEN_CRD_API_REFERENCE_DOCS_VERSION)
 
 ## Tool Versions
 KUSTOMIZE_VERSION ?= v5.3.0
 CONTROLLER_TOOLS_VERSION ?= v0.15.0
 ENVTEST_VERSION ?= latest
 GOLANGCI_LINT_VERSION ?= v1.59.1
 GOIMPORTS_VERSION ?= v0.22.0
+GEN_CRD_API_REFERENCE_DOCS_VERSION ?= v0.3.0
 
 .PHONY: kustomize
 kustomize: $(KUSTOMIZE) ## Download kustomize locally if necessary.
@@ -217,6 +223,11 @@ goimports: $(GOIMPORTS) ## Download goimports locally if necessary.
 $(GOIMPORTS): $(LOCALBIN)
 	$(call go-install-tool,$(GOIMPORTS),golang.org/x/tools/cmd/goimports,$(GOIMPORTS_VERSION))
 
+.PHONY: gen-crd-api-reference-docs
+gen-crd-api-reference-docs: $(GEN_CRD_API_REFERENCE_DOCS) ## Download gen-crd-api-reference-docs locally if necessary.
+$(GEN_CRD_API_REFERENCE_DOCS): $(LOCALBIN)
+	$(call go-install-tool,$(GEN_CRD_API_REFERENCE_DOCS),github.com/ahmetb/gen-crd-api-reference-docs,$(GEN_CRD_API_REFERENCE_DOCS_VERSION))
+
 # go-install-tool will 'go install' any package with custom target and name of binary, if it doesn't exist
 # $1 - target path with name of binary (ideally with version)
 # $2 - package url which can be installed

api/v1alpha1/doc.go

@@ -0,0 +1,7 @@
+// SPDX-FileCopyrightText: 2024 SAP SE or an SAP affiliate company and IronCore contributors
+// SPDX-License-Identifier: Apache-2.0
+
+// Package v1alpha1 contains API Schema definitions for the settings.gardener.cloud API group
+// +groupName=metal.ironcore.dev
+// +kubebuilder:object:generate=true
+package v1alpha1