package common import ( "fmt" "github.com/mitchellh/packer/common" "github.com/mitchellh/packer/template/interpolate" ) type OutputConfig struct { OutputDir string `mapstructure:"output_directory"` } func (c *OutputConfig) Prepare(ctx *interpolate.Context, pc *common.PackerConfig) []error { if c.OutputDir == "" { c.OutputDir = fmt.Sprintf("output-%s", pc.PackerBuildName) } return nil }