add some helpers

Signed-off-by: Steve Fan <29133953+stevefan1999-personal@users.noreply.github.com>

pkg/metadata/provider_short_name.go

@@ -0,0 +1,5 @@
+package main
+
+type ProviderShortName interface {
+	ShortName() string
+}

pkg/metadata/util.go

@@ -0,0 +1,31 @@
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+)
+
+type ProviderUtil interface {
+	WriteDataToFile(contentTrait string, permission os.FileMode, content string, dest string) error
+	MakeFolder(folderTrait string, permission os.FileMode, dest string) error
+}
+
+type DefaultProviderUtil struct {
+	ProviderUtil
+	ProviderShortName
+}
+
+func (p *DefaultProviderUtil) WriteDataToFile(contentTrait string, permission os.FileMode, content string, dest string) error {
+	if err := ioutil.WriteFile(dest, []byte(content), permission); err != nil {
+		return fmt.Errorf("%s: failed to write %s: %s", p.ShortName(), contentTrait, err)
+	}
+	return nil
+}
+
+func (p *DefaultProviderUtil) MakeFolder(folderTrait string, permission os.FileMode, dest string) error {
+	if err := os.Mkdir(dest, permission); err != nil {
+		return fmt.Errorf("%s: failed to make folder for %s: %s", p.ShortName(), folderTrait, err)
+	}
+	return nil
+}