first commit

pkg/registry/registry.go

@@ -0,0 +1,71 @@
+package registry
+
+import (
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"strings"
+)
+
+type Manifest struct {
+	Kind, Version string
+}
+
+type Registry interface {
+	DownloadSchema(kind, apiVersion string) error
+}
+
+type KubernetesRegistry struct {
+	baseURL    string
+	strict     bool
+}
+
+func NewKubernetesRegistry() *KubernetesRegistry {
+	return &KubernetesRegistry{
+		baseURL:    "https://kubernetesjsonschema.dev",
+		strict:     false,
+	}
+}
+
+
+func (r KubernetesRegistry) schemaURL(resourceKind, resourceAPIVersion, k8sVersion string) string {
+	normalisedVersion := k8sVersion
+	if normalisedVersion != "master" {
+		normalisedVersion = "v" + normalisedVersion
+	}
+
+	strictSuffix := ""
+	if r.strict {
+		strictSuffix = "-strict"
+	}
+
+	groupParts := strings.Split(resourceAPIVersion, "/")
+	versionParts := strings.Split(groupParts[0], ".")
+
+	kindSuffix := "-" + strings.ToLower(versionParts[0])
+	if len(groupParts) > 1 {
+		kindSuffix += "-" + strings.ToLower(groupParts[1])
+	}
+
+	return fmt.Sprintf("%s/%s-standalone%s/%s%s.json", r.baseURL, normalisedVersion, strictSuffix, strings.ToLower(resourceKind), kindSuffix)
+}
+
+func (r KubernetesRegistry) DownloadSchema(resourceKind, resourceAPIVersion, k8sVersion string) (string, error) {
+	url := r.schemaURL(resourceKind, resourceAPIVersion, k8sVersion)
+
+	resp, err := http.Get(url)
+	if err != nil {
+		return "", fmt.Errorf("failed downloading schema at %s: %s", url, err)
+	}
+	defer resp.Body.Close()
+
+	body, err :=  ioutil.ReadAll(resp.Body)
+	if err != nil {
+		return "", fmt.Errorf("failed downloading schema at %s: %s", url, err)
+	}
+
+	fmt.Printf("downloaded %s\n", url)
+
+	return string(body), nil
+}
+

pkg/resource/main.go

@@ -0,0 +1,30 @@
+package resource
+
+import (
+	"io"
+	"io/ioutil"
+	yaml "gopkg.in/yaml.v2"
+)
+
+type Resource struct {
+	Kind, Version, Namespace string
+}
+
+// TODO: Support multi-resources yaml files
+func Read(r io.Reader) (Resource, error) {
+	s, err := ioutil.ReadAll(r)
+	if err != nil {
+		return Resource{}, err
+	}
+
+	resource := struct {
+		APIVersion string `yaml:"apiVersion"`
+		Kind       string `yaml:"kind"`
+		Metadata   struct {
+			Namespace string `yaml:"Namespace"`
+		} `yaml:"Metadata"`
+	}{}
+	err = yaml.Unmarshal(s, &resource)
+
+	return Resource{Kind: resource.Kind, Version: resource.APIVersion, Namespace: resource.Metadata.Namespace}, err
+}