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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,254 @@ | ||
| /* | ||
| Copyright 2019 The Kubernetes Authors. | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
|
|
||
| package v3 | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "hash/fnv" | ||
| "path/filepath" | ||
| "text/template" | ||
|
|
||
| "sigs.k8s.io/kubebuilder/pkg/model/file" | ||
| ) | ||
|
|
||
| const defaultMainPath = "main.go" | ||
|
|
||
| var _ file.Template = &Main{} | ||
| var _ file.UseCustomFuncMap = &Main{} | ||
|
|
||
| // Main scaffolds the controller manager entry point | ||
| type Main struct { | ||
| file.TemplateMixin | ||
| file.BoilerplateMixin | ||
| file.DomainMixin | ||
| file.RepositoryMixin | ||
| } | ||
|
|
||
| // SetTemplateDefaults implements file.Template | ||
| func (f *Main) SetTemplateDefaults() error { | ||
| if f.Path == "" { | ||
| f.Path = filepath.Join(defaultMainPath) | ||
| } | ||
|
|
||
| f.TemplateBody = fmt.Sprintf(mainTemplate, | ||
| file.NewMarkerFor(f.Path, importMarker), | ||
| file.NewMarkerFor(f.Path, addSchemeMarker), | ||
| file.NewMarkerFor(f.Path, setupMarker), | ||
| ) | ||
|
|
||
| return nil | ||
| } | ||
|
|
||
| func hash(s string) (string, error) { | ||
| hasher := fnv.New32a() | ||
| hasher.Write([]byte(s)) // nolint:errcheck | ||
| return fmt.Sprintf("%x", hasher.Sum(nil)), nil | ||
| } | ||
|
|
||
| // GetFuncMap implements file.UseCustomFuncMap | ||
| func (f *Main) GetFuncMap() template.FuncMap { | ||
| fm := file.DefaultFuncMap() | ||
| fm["hash"] = hash | ||
| return fm | ||
| } | ||
|
|
||
| var _ file.Inserter = &MainUpdater{} | ||
|
|
||
| // MainUpdater updates main.go to run Controllers | ||
| type MainUpdater struct { //nolint:maligned | ||
| file.RepositoryMixin | ||
| file.MultiGroupMixin | ||
| file.ResourceMixin | ||
|
|
||
| // Flags to indicate which parts need to be included when updating the file | ||
| WireResource, WireController, WireWebhook bool | ||
| } | ||
|
|
||
| // GetPath implements Builder | ||
| func (*MainUpdater) GetPath() string { | ||
| return defaultMainPath | ||
| } | ||
|
|
||
| // GetIfExistsAction implements Builder | ||
| func (*MainUpdater) GetIfExistsAction() file.IfExistsAction { | ||
| return file.Overwrite | ||
| } | ||
|
|
||
| const ( | ||
| importMarker = "imports" | ||
| addSchemeMarker = "scheme" | ||
| setupMarker = "builder" | ||
| ) | ||
|
|
||
| // GetMarkers implements file.Inserter | ||
| func (f *MainUpdater) GetMarkers() []file.Marker { | ||
| return []file.Marker{ | ||
| file.NewMarkerFor(defaultMainPath, importMarker), | ||
| file.NewMarkerFor(defaultMainPath, addSchemeMarker), | ||
| file.NewMarkerFor(defaultMainPath, setupMarker), | ||
| } | ||
| } | ||
|
|
||
| const ( | ||
| apiImportCodeFragment = `%s "%s" | ||
| ` | ||
| controllerImportCodeFragment = `"%s/controllers" | ||
| ` | ||
|
|
||
| multiGroupControllerImportCodeFragment = `%scontrollers "%s/controllers/%s" | ||
| ` | ||
| addschemeCodeFragment = `utilruntime.Must(%s.AddToScheme(scheme)) | ||
| ` | ||
| reconcilerSetupCodeFragment = `if err = (&controllers.%sReconciler{ | ||
| Client: mgr.GetClient(), | ||
| Log: ctrl.Log.WithName("controllers").WithName("%s"), | ||
| Scheme: mgr.GetScheme(), | ||
| }).SetupWithManager(mgr); err != nil { | ||
| setupLog.Error(err, "unable to create controller", "controller", "%s") | ||
| os.Exit(1) | ||
| } | ||
| ` | ||
| multiGroupReconcilerSetupCodeFragment = `if err = (&%scontrollers.%sReconciler{ | ||
| Client: mgr.GetClient(), | ||
| Log: ctrl.Log.WithName("controllers").WithName("%s").WithName("%s"), | ||
| Scheme: mgr.GetScheme(), | ||
| }).SetupWithManager(mgr); err != nil { | ||
| setupLog.Error(err, "unable to create controller", "controller", "%s") | ||
| os.Exit(1) | ||
| } | ||
| ` | ||
| webhookSetupCodeFragment = `if err = (&%s.%s{}).SetupWebhookWithManager(mgr); err != nil { | ||
| setupLog.Error(err, "unable to create webhook", "webhook", "%s") | ||
| os.Exit(1) | ||
| } | ||
| ` | ||
| ) | ||
|
|
||
| // GetCodeFragments implements file.Inserter | ||
| func (f *MainUpdater) GetCodeFragments() file.CodeFragmentsMap { | ||
| fragments := make(file.CodeFragmentsMap, 3) | ||
|
|
||
| // If resource is not being provided we are creating the file, not updating it | ||
| if f.Resource == nil { | ||
| return fragments | ||
| } | ||
|
|
||
| // Generate import code fragments | ||
| imports := make([]string, 0) | ||
| imports = append(imports, fmt.Sprintf(apiImportCodeFragment, f.Resource.ImportAlias, f.Resource.Package)) | ||
| if f.WireController { | ||
| if !f.MultiGroup { | ||
| imports = append(imports, fmt.Sprintf(controllerImportCodeFragment, f.Repo)) | ||
| } else { | ||
| imports = append(imports, fmt.Sprintf(multiGroupControllerImportCodeFragment, | ||
| f.Resource.GroupPackageName, f.Repo, f.Resource.Group)) | ||
| } | ||
| } | ||
|
|
||
| // Generate add scheme code fragments | ||
| addScheme := make([]string, 0) | ||
| addScheme = append(addScheme, fmt.Sprintf(addschemeCodeFragment, f.Resource.ImportAlias)) | ||
|
|
||
| // Generate setup code fragments | ||
| setup := make([]string, 0) | ||
| if f.WireController { | ||
| if !f.MultiGroup { | ||
| setup = append(setup, fmt.Sprintf(reconcilerSetupCodeFragment, | ||
| f.Resource.Kind, f.Resource.Kind, f.Resource.Kind)) | ||
| } else { | ||
| setup = append(setup, fmt.Sprintf(multiGroupReconcilerSetupCodeFragment, | ||
| f.Resource.GroupPackageName, f.Resource.Kind, f.Resource.Group, f.Resource.Kind, f.Resource.Kind)) | ||
| } | ||
| } | ||
| if f.WireWebhook { | ||
| setup = append(setup, fmt.Sprintf(webhookSetupCodeFragment, | ||
| f.Resource.ImportAlias, f.Resource.Kind, f.Resource.Kind)) | ||
| } | ||
|
|
||
| // Only store code fragments in the map if the slices are non-empty | ||
| if len(imports) != 0 { | ||
| fragments[file.NewMarkerFor(defaultMainPath, importMarker)] = imports | ||
| } | ||
| if len(addScheme) != 0 { | ||
| fragments[file.NewMarkerFor(defaultMainPath, addSchemeMarker)] = addScheme | ||
| } | ||
| if len(setup) != 0 { | ||
| fragments[file.NewMarkerFor(defaultMainPath, setupMarker)] = setup | ||
| } | ||
|
|
||
| return fragments | ||
| } | ||
|
|
||
| var mainTemplate = `{{ .Boilerplate }} | ||
| package main | ||
| import ( | ||
| "flag" | ||
| "os" | ||
| "k8s.io/apimachinery/pkg/runtime" | ||
| utilruntime "k8s.io/apimachinery/pkg/util/runtime" | ||
| clientgoscheme "k8s.io/client-go/kubernetes/scheme" | ||
| _ "k8s.io/client-go/plugin/pkg/client/auth/gcp" | ||
| ctrl "sigs.k8s.io/controller-runtime" | ||
| "sigs.k8s.io/controller-runtime/pkg/log/zap" | ||
| %s | ||
| ) | ||
| var ( | ||
| scheme = runtime.NewScheme() | ||
| setupLog = ctrl.Log.WithName("setup") | ||
| ) | ||
| func init() { | ||
| utilruntime.Must(clientgoscheme.AddToScheme(scheme)) | ||
| %s | ||
| } | ||
| func main() { | ||
| var metricsAddr string | ||
| var enableLeaderElection bool | ||
| flag.StringVar(&metricsAddr, "metrics-addr", ":8080", "The address the metric endpoint binds to.") | ||
| flag.BoolVar(&enableLeaderElection, "enable-leader-election", false, | ||
| "Enable leader election for controller manager. " + | ||
| "Enabling this will ensure there is only one active controller manager.") | ||
| flag.Parse() | ||
| ctrl.SetLogger(zap.New(zap.UseDevMode(true))) | ||
| mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{ | ||
| Scheme: scheme, | ||
| MetricsBindAddress: metricsAddr, | ||
| Port: 9443, | ||
| LeaderElection: enableLeaderElection, | ||
| LeaderElectionID: "{{ hash .Repo }}.{{ .Domain }}", | ||
| }) | ||
| if err != nil { | ||
| setupLog.Error(err, "unable to start manager") | ||
| os.Exit(1) | ||
| } | ||
| %s | ||
| setupLog.Info("starting manager") | ||
| if err := mgr.Start(ctrl.SetupSignalHandler()); err != nil { | ||
| setupLog.Error(err, "problem running manager") | ||
| os.Exit(1) | ||
| } | ||
| } | ||
| ` |
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