Move generated CRDs into their own directory

Introduce the static/_crds/* directories, which replace the
static/manifests/*/CustomResourceDefinition directories. The underscore
in the name prevents go tools from descending into the folder when
looking for go files. This makes it safe to run go commands at the same
time as generating the CRDs in this folder.

This prevents errors like the following:

  go: finding module for package github.com/k0sproject/k0s/static/manifests/v1beta1/CustomResourceDefinition
  go: finding module for package github.com/k0sproject/k0s/static/manifests/helm/CustomResourceDefinition
  go: finding module for package github.com/k0sproject/k0s/static/manifests/autopilot/CustomResourceDefinition
  go: finding module for package github.com/k0sproject/k0s/static/manifests/etcd/CustomResourceDefinition
  go: github.com/k0sproject/k0s/static/manifests/autopilot/CustomResourceDefinition: no matching versions for query "latest"
  go: github.com/k0sproject/k0s/static/manifests/etcd/CustomResourceDefinition: no matching versions for query "latest"
  go: github.com/k0sproject/k0s/static/manifests/helm/CustomResourceDefinition: no matching versions for query "latest"
  go: github.com/k0sproject/k0s/static/manifests/v1beta1/CustomResourceDefinition: no matching versions for query "latest"
  make: *** [Makefile:113: go.sum] Error 1

Signed-off-by: Tom Wieczorek <[email protected]>

Makefile

@@ -123,14 +123,13 @@ $(foreach gv,$(api_group_versions),$(eval $(foreach t,$(api_group_version_target
 controller_gen_targets := $(foreach gv,$(api_group_versions),pkg/apis/$(gv)/.controller-gen.stamp)
 codegen_targets := $(controller_gen_targets)
 $(controller_gen_targets): .k0sbuild.docker-image.k0s hack/tools/boilerplate.go.txt hack/tools/Makefile.variables
-	rm -rf 'static/manifests/$(dir $(@:pkg/apis/%/.controller-gen.stamp=%))CustomResourceDefinition'
-	mkdir -p 'static/manifests/$(dir $(@:pkg/apis/%/.controller-gen.stamp=%))'
+	rm -rf 'static/_crds/$(dir $(@:pkg/apis/%/.controller-gen.stamp=%))'
 	gendir="$$(mktemp -d .controller-gen.XXXXXX.tmp)" \
 	  && trap "rm -rf -- $$gendir" INT EXIT \
 	  && CGO_ENABLED=0 $(GO) run sigs.k8s.io/controller-tools/cmd/controller-gen@v$(controller-gen_version) \
 	    paths="./$(dir $@)..." \
 	    object:headerFile=hack/tools/boilerplate.go.txt output:object:dir="$$gendir" \
-	    crd output:crd:dir='static/manifests/$(dir $(@:pkg/apis/%/.controller-gen.stamp=%))CustomResourceDefinition' \
+	    crd output:crd:dir='static/_crds/$(dir $(@:pkg/apis/%/.controller-gen.stamp=%))' \
 	  && mv -f -- "$$gendir"/zz_generated.deepcopy.go '$(dir $@).'
 	touch -- '$@'
 
@@ -167,12 +166,12 @@ pkg/client/clientset/.client-gen.stamp: .k0sbuild.docker-image.k0s hack/tools/bo
 	touch -- '$@'
 
 codegen_targets += static/zz_generated_assets.go
-static/zz_generated_assets.go: $(controller_gen_targets) # to generate the CRDs into static/manifests/*/CustomResourceDefinition
+static/zz_generated_assets.go: $(controller_gen_targets) # to generate the CRDs into static/_crds/*
 static/zz_generated_assets.go: $(shell find static/manifests/calico static/manifests/windows static/misc -type f)
 static/zz_generated_assets.go: .k0sbuild.docker-image.k0s hack/tools/Makefile.variables
 	CGO_ENABLED=0 $(GO) run github.com/kevinburke/go-bindata/go-bindata@v$(go-bindata_version) \
 	  -o '$@' -pkg static -prefix static \
-	  $(foreach gv,$(api_group_versions),static/manifests/$(dir $(gv))CustomResourceDefinition/...) \
+	  $(foreach gv,$(api_group_versions),static/_crds/$(dir $(gv))...) \
 	  static/manifests/calico/... \
 	  static/manifests/windows/... \
 	  static/misc/...

pkg/component/controller/crd.go

@@ -70,7 +70,7 @@ func (c CRD) Init(_ context.Context) error {
 
 // Run unpacks manifests from bindata
 func (c CRD) Start(_ context.Context) error {
-	crdAssetsPath := path.Join("manifests", c.assetsDir, "CustomResourceDefinition")
+	crdAssetsPath := path.Join("_crds", "manifests", c.assetsDir)
 	crds, err := static.AssetDir(crdAssetsPath)
 	if err != nil {
 		return fmt.Errorf("can't unbundle CRD `%s` manifests: %w", c.bundle, err)