zones: Machine.WriteStringFile()

Signed-off-by: Alejandro Mery <amery@jpi.io>

pkg/zones/machine_file.go

@@ -1,6 +1,7 @@
 package zones
 
 import (
+	"bytes"
 	"fmt"
 	"io"
 	"os"
@@ -58,6 +59,19 @@ func (m *Machine) ReadFile(name string, args ...any) ([]byte, error) {
 	return fs.ReadFile(base, fullName)
 }
 
+// WriteStringFile writes the given content to a file on the machine's config directory
+func (m *Machine) WriteStringFile(value string, name string, args ...any) error {
+	f, err := m.CreateTruncFile(name, args...)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+
+	buf := bytes.NewBufferString(value)
+	_, err = buf.WriteTo(f)
+	return err
+}
+
 func (m *Machine) getFilename(name string, args ...any) string {
 	if len(args) > 0 {
 		name = fmt.Sprintf(name, args...)