Merge pull request #951 from Liujingfang1/generatorplugins

add support for generator go-plugins

plugins/ServiceGenerator.go

@@ -0,0 +1,57 @@
+package main
+
+import (
+	"bytes"
+	"text/template"
+
+	"sigs.k8s.io/kustomize/k8sdeps/kunstruct"
+	"sigs.k8s.io/kustomize/pkg/ifc"
+	"sigs.k8s.io/kustomize/pkg/resmap"
+	"sigs.k8s.io/kustomize/pkg/resource"
+)
+
+type plugin struct {
+	ServiceName string
+	Port        string
+}
+
+var Generator plugin
+
+var manifest = `
+apiVersion: v1
+kind: Service
+metadata:
+  labels:
+    app: dev
+  name: {{.ServiceName}}
+spec:
+  ports:
+  - port: {{.Port}}
+  selector:
+    app: dev
+`
+
+func (p *plugin) Config(k ifc.Kunstructured) error {
+	var err error
+	p.ServiceName, err = k.GetFieldValue("service")
+	if err != nil {
+		return err
+	}
+	p.Port, err = k.GetFieldValue("port")
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func (p *plugin) Generate() (resmap.ResMap, error) {
+	var buf bytes.Buffer
+
+	temp := template.Must(template.New("manifest").Parse(manifest))
+	err := temp.Execute(&buf, p)
+	if err != nil {
+		return nil, err
+	}
+	rf := resmap.NewFactory(resource.NewFactory(kunstruct.NewKunstructuredFactoryImpl()))
+	return rf.NewResMapFromBytes(buf.Bytes())
+}