variable "release_version_label" {
  type     = string
  default  = null
  nullable = true

  description = "Immutable Elastic Beanstalk application version. Null VCS plans leave the live version unchanged."

  validation {
    condition = (
      var.release_version_label == null ||
      can(regex("^[0-9a-f]{40}-[0-9]+-[0-9]+$", var.release_version_label))
    )
    error_message = "release_version_label must be <full-sha>-<run-id>-<attempt>."
  }
}