add readme to go/v3 scaffold templates

Signed-off-by: Bryce Palmer <bpalmer@redhat.com>

pkg/plugins/golang/v3/scaffolds/init.go

@@ -112,5 +112,6 @@ func (s *initScaffolder) Scaffold() error {
 		},
 		&templates.Dockerfile{},
 		&templates.DockerIgnore{},
+		&templates.Readme{},
 	)
 }

pkg/plugins/golang/v3/scaffolds/internal/templates/readme.go

@@ -0,0 +1,129 @@
+/*
+Copyright 2022 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 templates
+
+import (
+	"fmt"
+	"strings"
+
+	"sigs.k8s.io/kubebuilder/v3/pkg/machinery"
+)
+
+var _ machinery.Template = &Readme{}
+
+// Readme scaffolds a README.md file
+type Readme struct {
+	machinery.TemplateMixin
+	machinery.BoilerplateMixin
+	machinery.ProjectNameMixin
+
+	License string
+}
+
+// SetTemplateDefaults implements file.Template
+func (f *Readme) SetTemplateDefaults() error {
+	if f.Path == "" {
+		f.Path = "README.md"
+	}
+
+	f.License = strings.Replace(
+		strings.Replace(string(f.Boilerplate), "/*", "", 1),
+		"*/", "", 1)
+
+	f.TemplateBody = fmt.Sprintf(readmeFileTemplate,
+		codeFence("sh", "kubectl apply -f config/samples/"),
+		codeFence("sh", "make docker-build docker-push IMG=<some-registry>/{{ .ProjectName }}:tag"),
+		codeFence("sh", "make deploy IMG=<some-registry>/{{ .ProjectName }}:tag"),
+		codeFence("sh", "make uninstall"),
+		codeFence("sh", "make undeploy"),
+		codeFence("sh", "make install"),
+		codeFence("sh", "make run"),
+		codeFence("sh", "make manifests"))
+
+	return nil
+}
+
+//nolint:lll
+const readmeFileTemplate = `# {{ .ProjectName }}
+// TODO(user): Add simple overview of use/purpose
+
+## Description
+// TODO(user): An in-depth paragraph about your project and overview of use
+
+## Getting Started
+You’ll need a Kubernetes cluster to run against. You can use [KIND](https://sigs.k8s.io/kind) to get a local cluster for testing, or run against a remote cluster.
+**Note:** Your controller will automatically use the current context in your kubeconfig file (i.e. whatever cluster ` + "`kubectl cluster-info`" + ` shows).
+
+### Running on the cluster
+1. Install Instances of Custom Resources:
+
+%s
+
+2. Build and push your image to the location specified by ` + "`IMG`" + `:
+	
+%s
+	
+3. Deploy the controller to the cluster with the image specified by ` + "`IMG`" + `:
+
+%s
+
+### Uninstall CRDs
+To delete the CRDs from the cluster:
+
+%s
+
+### Undeploy controller
+UnDeploy the controller to the cluster:
+
+%s
+
+## Contributing
+// TODO(user): Add detailed information on how you would like others to contribute to this project
+
+### How it works
+This project aims to follow the Kubernetes [Operator pattern](https://kubernetes.io/docs/concepts/extend-kubernetes/operator/)
+
+It uses [Controllers](https://kubernetes.io/docs/concepts/architecture/controller/) 
+which provides a reconcile function responsible for synchronizing resources untile the desired state is reached on the cluster 
+
+### Test It Out
+1. Install the CRDs into the cluster:
+
+%s
+
+2. Run your controller (this will run in the foreground, so switch to a new terminal if you want to leave it running):
+
+%s
+
+**NOTE:** You can also run this in one step by running: ` + "`make install run`" + `
+
+### Modifying the API definitions
+If you are editing the API definitions, generate the manifests such as CRs or CRDs using:
+
+%s
+
+**NOTE:** Run ` + "`make --help`" + ` for more information on all potential ` + "`make`" + ` targets
+
+More information can be found via the [Kubebuilder Documentation](https://book.kubebuilder.io/introduction.html)
+
+## License
+{{ .License }}
+`
+
+func codeFence(syntax string, code string) string {
+	return "```" + syntax + "\n" + code + "\n" + "```"
+}

testdata/project-v3-addon/README.md

@@ -0,0 +1,94 @@
+# project-v3-addon
+// TODO(user): Add simple overview of use/purpose
+
+## Description
+// TODO(user): An in-depth paragraph about your project and overview of use
+
+## Getting Started
+You’ll need a Kubernetes cluster to run against. You can use [KIND](https://sigs.k8s.io/kind) to get a local cluster for testing, or run against a remote cluster.
+**Note:** Your controller will automatically use the current context in your kubeconfig file (i.e. whatever cluster `kubectl cluster-info` shows).
+
+### Running on the cluster
+1. Install Instances of Custom Resources:
+
+```sh
+kubectl apply -f config/samples/
+```
+
+2. Build and push your image to the location specified by `IMG`:
+
+```sh
+make docker-build docker-push IMG=<some-registry>/project-v3-addon:tag
+```
+
+3. Deploy the controller to the cluster with the image specified by `IMG`:
+
+```sh
+make deploy IMG=<some-registry>/project-v3-addon:tag
+```
+
+### Uninstall CRDs
+To delete the CRDs from the cluster:
+
+```sh
+make uninstall
+```
+
+### Undeploy controller
+UnDeploy the controller to the cluster:
+
+```sh
+make undeploy
+```
+
+## Contributing
+// TODO(user): Add detailed information on how you would like others to contribute to this project
+
+### How it works
+This project aims to follow the Kubernetes [Operator pattern](https://kubernetes.io/docs/concepts/extend-kubernetes/operator/)
+
+It uses [Controllers](https://kubernetes.io/docs/concepts/architecture/controller/) 
+which provides a reconcile function responsible for synchronizing resources untile the desired state is reached on the cluster 
+
+### Test It Out
+1. Install the CRDs into the cluster:
+
+```sh
+make install
+```
+
+2. Run your controller (this will run in the foreground, so switch to a new terminal if you want to leave it running):
+
+```sh
+make run
+```
+
+**NOTE:** You can also run this in one step by running: `make install run`
+
+### Modifying the API definitions
+If you are editing the API definitions, generate the manifests such as CRs or CRDs using:
+
+```sh
+make manifests
+```
+
+**NOTE:** Run `make --help` for more information on all potential `make` targets
+
+More information can be found via the [Kubebuilder Documentation](https://book.kubebuilder.io/introduction.html)
+
+## License
+
+Copyright 2022 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.
+

testdata/project-v3-config/README.md

@@ -0,0 +1,94 @@
+# project-v3-config
+// TODO(user): Add simple overview of use/purpose
+
+## Description
+// TODO(user): An in-depth paragraph about your project and overview of use
+
+## Getting Started
+You’ll need a Kubernetes cluster to run against. You can use [KIND](https://sigs.k8s.io/kind) to get a local cluster for testing, or run against a remote cluster.
+**Note:** Your controller will automatically use the current context in your kubeconfig file (i.e. whatever cluster `kubectl cluster-info` shows).
+
+### Running on the cluster
+1. Install Instances of Custom Resources:
+
+```sh
+kubectl apply -f config/samples/
+```
+
+2. Build and push your image to the location specified by `IMG`:
+
+```sh
+make docker-build docker-push IMG=<some-registry>/project-v3-config:tag
+```
+
+3. Deploy the controller to the cluster with the image specified by `IMG`:
+
+```sh
+make deploy IMG=<some-registry>/project-v3-config:tag
+```
+
+### Uninstall CRDs
+To delete the CRDs from the cluster:
+
+```sh
+make uninstall
+```
+
+### Undeploy controller
+UnDeploy the controller to the cluster:
+
+```sh
+make undeploy
+```
+
+## Contributing
+// TODO(user): Add detailed information on how you would like others to contribute to this project
+
+### How it works
+This project aims to follow the Kubernetes [Operator pattern](https://kubernetes.io/docs/concepts/extend-kubernetes/operator/)
+
+It uses [Controllers](https://kubernetes.io/docs/concepts/architecture/controller/) 
+which provides a reconcile function responsible for synchronizing resources untile the desired state is reached on the cluster 
+
+### Test It Out
+1. Install the CRDs into the cluster:
+
+```sh
+make install
+```
+
+2. Run your controller (this will run in the foreground, so switch to a new terminal if you want to leave it running):
+
+```sh
+make run
+```
+
+**NOTE:** You can also run this in one step by running: `make install run`
+
+### Modifying the API definitions
+If you are editing the API definitions, generate the manifests such as CRs or CRDs using:
+
+```sh
+make manifests
+```
+
+**NOTE:** Run `make --help` for more information on all potential `make` targets
+
+More information can be found via the [Kubebuilder Documentation](https://book.kubebuilder.io/introduction.html)
+
+## License
+
+Copyright 2022 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.
+