Achieving similar functionality to buildx bake with buildkit (multi arch)

[dkebler]

I'm considering a leap to buildah. The limitiations of Dockerfiles kinda sucks and since I'm a bash pro I see buildha will give me the flexibility lacking in Dockerfiles.

But I have been using buildx bake with buildkit and docker-containers driver in docker to build, test and push multi arch images. I really like the "target" functionality in a .hcl file. I makes it easy to make dev targets or deploy targets including multiarch targets to docker hub.

function "tag" {
  params = [suffix]
  result = [format("${IMAGE_NAME}%s:${TAG}", notequal("", suffix) ? "-${suffix}" : "")]
}
# groups
group "dev" {
  targets = ["amd"]
}
group "default" {
  targets = ["amd"]
}
group "deploy" {
  targets = ["multi"]
}
group "private" {
  targets = [
    "amd",
    "arm"
  ]
}
# intended for use with default local docker builder     
# uses 'dev' group in docker-bake.hcl   
# assume dev machine is amd64 machine
target "amd" {
  context    = "."
  dockerfile = "Dockerfile"
  args = {
    LINUX_DISTRO = "${LINUX_DISTRO}"
    BASE_IMAGE   = "${BASE_IMAGE}"
    TAG          = "${TAG}"
    SCRIPTS      = "${BUILD_DIR}"
    KEEP         = "${KEEP}"
    SYSADMIN_PW  = "${SYSADMIN_PW}"
  }
  tags      = tag("")
  platforms = ["linux/amd64"]
}

# intended for use with default docker driver on an arm64 machine 
# use with 'arm' group 
target "arm" {
  inherits  = ["amd"]
  tags      = tag("arm64")
  platforms = ["linux/arm64"]
}

# must use with docker-container driver for multiarch image deployment to registry
# uses 'deploy' group in docker-bake.hcl
target "multi" {
  inherits  = ["amd"]
  tags      = tag("")
  platforms = ["linux/amd64", "linux/arm64"]
  output    = ["type=registry"]
}

Has anyone more or less developed scripts around buildah with the same functionality? If so point me to some github repos.

can buildah even build arm images on a amd machine (like moby/buildkit can inside a qemu container)?