packer/vendor/github.com/ugorji/go/codec/codecgen.go

// +build codecgen generated

package codec

// this file sets the codecgen variable to true
// when the build tag codecgen is set.
//
// some tests depend on knowing whether in the context of codecgen or not.
// For example, some tests should be skipped during codecgen e.g. missing fields tests.

func init() {
	codecgen = true
}