# ===========================================================================
# docker-bastion — multi-platform build
#
# Usage:
#   docker buildx bake
#   docker buildx bake --set "*.platform=linux/amd64,linux/arm64"
#
# Override registry / name:
#   REGISTRY=ghcr.io/myorg IMAGE_NAME=docker-bastion docker buildx bake
# ===========================================================================

variable "REGISTRY" {
  default = ""
}

variable "IMAGE_NAME" {
  default = "docker-bastion"
}

variable "ALPINE_VERSION" {
  default = "3.21"
}

function "tag" {
  params = [name]
  result = REGISTRY != "" ? "${REGISTRY}/${IMAGE_NAME}:${name}" : "${IMAGE_NAME}:${name}"
}

target "default" {
  context    = "."
  dockerfile = "Dockerfile"
  args = {
    ALPINE_VERSION = "${ALPINE_VERSION}"
  }
  platforms = ["linux/amd64", "linux/arm64"]
  tags = [tag("latest"), tag("alpine${ALPINE_VERSION}")]
}