terraform/internal/states/statemgr/lineage.go

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package statemgr
import (
"fmt"
uuid "github.com/hashicorp/go-uuid"
)
// NewLineage generates a new lineage identifier string. A lineage identifier
// is an opaque string that is intended to be unique in space and time, chosen
// when state is recorded at a location for the first time and then preserved
// afterwards to allow Terraform to recognize when one state snapshot is a
// predecessor or successor of another.
func NewLineage() string {
lineage, err := uuid.GenerateUUID()
if err != nil {
panic(fmt.Errorf("Failed to generate lineage: %v", err))
}
return lineage
}