coalesce

coalesce(vals... any) any

variable "target_region" {
  description = "Explicit deployment region (optional)"
  type        = string
  default     = null
}

variable "default_region" {
  description = "Fallback region from team defaults (optional)"
  type        = string
  default     = null
}

computed "region" {
  description = "Resolved deployment region"
  expression  = coalesce(var.target_region, var.default_region, "us-east-1")
}

task "deploy" {
  description = "Deploy to the resolved region"
  commands    = ["aws ecs update-service --region ${computed.region} --cluster prod --service api --force-new-deployment"]
}