Docker Extra

lang.docker adds Dockerfile and Docker Compose support, with hadolint linting for Dockerfiles.

Enable it

-- ~/.config/blak/lua/blak/user.lua
return {
  extras = {
    enabled = {
      "lang.docker",
    },
  },
}

Or enable it interactively:

:BlakExtras enable lang.docker

What it adds

Surface	Contribution
Treesitter	dockerfile
Mason	hadolint
LSP	dockerls, docker_compose_language_service
Linting	hadolint for dockerfile
Filetype	registers yaml.docker-compose for Compose files

Language servers install automatically through Mason: dockerls maps to dockerfile-language-server and docker_compose_language_service to docker-compose-language-service.

Compose file detection

Stock Neovim does not assign Compose files their own filetype, so this extra registers yaml.docker-compose for docker-compose.yml, docker-compose.yaml, compose.yml, compose.yaml, and dotted variants such as compose.override.yaml. That filetype is what docker_compose_language_service attaches to.

Install and verify

:BlakToolsInstall
:BlakTreesitterInstall
:BlakDoctor

Open a Dockerfile and check :LspInfo for dockerls; save it to see hadolint diagnostics. Open a docker-compose.yml and check that docker_compose_language_service attaches.