package buildah

import (
	"io"

	cp "github.com/containers/image/copy"
	"github.com/containers/image/types"
)

const (
	// OCI used to define the "oci" image format
	OCI = "oci"
	// DOCKER used to define the "docker" image format
	DOCKER = "docker"
)

func getCopyOptions(reportWriter io.Writer, sourceSystemContext *types.SystemContext, destinationSystemContext *types.SystemContext, manifestType string) *cp.Options {
	return &cp.Options{
		ReportWriter:          reportWriter,
		SourceCtx:             sourceSystemContext,
		DestinationCtx:        destinationSystemContext,
		ForceManifestMIMEType: manifestType,
	}
}

func getSystemContext(defaults *types.SystemContext, signaturePolicyPath string) *types.SystemContext {
	sc := &types.SystemContext{}
	if defaults != nil {
		*sc = *defaults
	}
	if signaturePolicyPath != "" {
		sc.SignaturePolicyPath = signaturePolicyPath
	}
	return sc
}