Cleanup some debug code and reorganize config struct

post-processor/compress/post-processor.go

@@ -21,12 +21,16 @@ import (
 
 type Config struct {
 	common.PackerConfig `mapstructure:",squash"`
+
+	// Fields from config file
 	OutputPath        string `mapstructure:"output"`
 	CompressionLevel  int    `mapstructure:"compression_level"`
 	KeepInputArtifact bool   `mapstructure:"keep_input_artifact"`
+
+	// Derived fields
 	Archive   string
 	Algorithm string
-	UsingDefault        bool
+
 	ctx *interpolate.Context
 }
 
@@ -54,8 +58,6 @@ func (p *PostProcessor) Configure(raws ...interface{}) error {
 		},
 	}, raws...)
 
-	fmt.Printf("CompressionLevel: %d\n", p.config.CompressionLevel)
-
 	errs := new(packer.MultiError)
 
 	if p.config.OutputPath == "" {
@@ -81,7 +83,6 @@ func (p *PostProcessor) Configure(raws ...interface{}) error {
 		p.config.CompressionLevel = pgzip.DefaultCompression
 	}
 
-	fmt.Printf("CompressionLevel: %d\n", p.config.CompressionLevel)
 	for key, ptr := range templates {
 		if *ptr == "" {
 			errs = packer.MultiErrorAppend(