Matrix Target; Invalid name; only "[a-zA-Z0-9_-]+" are allowed

[MalteMagnussen]

Trying out HCL.

I want to build our Golang images.

I want to use a "Matrix" for the versions of Golang.

But I get ERROR: docker-bake.hcl:12,8-25: Invalid name; only "[a-zA-Z0-9_-]+" are allowed

I assume I have to use the matrix value in the name. Is there another way?

If I don't use "name" in the target "golang_versions" I get this error Invalid name; duplicate name "golang_versions"

So what do I do then? How do I create unique names for each step in the Matrix?

// https://docs.docker.com/guides/bake/
variable "HARBOR_REGISTRY_PREFIX" {
  default = "harbor.company.com/standard-images"
}

target "_jammy" {
  args = {
    FROM_TAG = "jammy-rootless"
  }
}

target "golang_versions" {
  name = "golang_version_${SOFTWARE_VER}"
  matrix = {
    SOFTWARE_VER = [
      "1.13",
      "1.14",
      "1.15",
      "1.16",
      "1.17",
      "1.18",
      "1.19",
      "1.20",
      "1.21",
      "1.22",
      "1.23",
      "1.24"
    ]
  }
}

// docker buildx bake test
target "go_test" {
  inherits = [
    "_jammy",
    "golang_versions"
  ]

  args = {
    SOFTWARE_VER = SOFTWARE_VER
  }

  // Set the target build stage to build. This is the same as the --target flag.
  target = "test"
  
  dockerfile = "ci/go/Dockerfile"

  contexts = {
    shunit = "./vendor/shunit2"
    test_script = "./ci/go"
  }

  // Using type=cacheonly ensures that the build output is effectively discarded; the layers are saved to BuildKit's cache, but Buildx will not attempt to load the result to the Docker Engine's image store.
  // For test runs, you don't need to export the build output — only the test execution matters.
  output = ["type=cacheonly"]

}

[crazy-max]

name = "golang_version_${SOFTWARE_VER}"

Since #2649 (buildx v0.17.0) you can use the sanitize func:

target "golang_versions" {
  name = sanitize("golang_version_${SOFTWARE_VER}")
  matrix = {
    SOFTWARE_VER = [
      "1.13",
      "1.14",
      "1.15",
      "1.16",
      "1.17",
      "1.18",
      "1.19",
      "1.20",
      "1.21",
      "1.22",
      "1.23",
      "1.24"
    ]
  }
}

[MalteMagnussen]

Thank you. Have a nice weekend.