builder/digitalocean: Scrub config before logging [GH-516]

builder/digitalocean/builder.go

@@ -11,6 +11,7 @@ import (
 	"github.com/mitchellh/packer/packer"
 	"log"
 	"os"
+	"strings"
 	"time"
 )
 
@@ -164,7 +165,10 @@ func (b *Builder) Prepare(raws ...interface{}) error {
 		return errs
 	}
 
-	log.Printf("Config: %+v", b.config)
+	configRepr := fmt.Sprintf("Config: %+v", b.config)
+	scrubbedConfig := strings.Replace(configRepr, b.config.ClientID, "CLIENT_ID", -1)
+	scrubbedConfig = strings.Replace(scrubbedConfig, b.config.APIKey, "API_KEY", -1)
+	log.Println(scrubbedConfig)
 	return nil
 }