composeimage

type Options struct {
	// TargetService is the app service whose build: block is replaced when AllBuilt is false (required then).
	TargetService string
	// ImageExpr is the YAML value for image: when ServiceImages is nil (default ${DEPLOY_IMAGE}).
	ImageExpr string
	// ServiceImages maps service name → full image reference for AllBuilt mode. When non-nil,
	// every service with build: must appear in the map; each gets that literal image: value.
	// When nil and AllBuilt, ImageExpr is used for all built services (same tag).
	ServiceImages map[string]string
	// AllBuilt if true, every service with build: is converted to image: (same ImageExpr).
	// If false, only TargetService is converted and any other service with build: is an error.
	AllBuilt bool
}