Run Elm and lunarvim in a devcontainer

name: d-c-lunarvim-x services: lvim: build: context: . dockerfile: Dockerfile.lunarvim networks: - internal # Ensure DevContainer connects to the same network volumes: - lvim-cs-dependency-cache:/home/lunaruser/.elm - ..:/workspace command: ["sleep", "infinity"] volumes: lvim-cs-dependency-cache: networks: internal: driver: bridge 

{ "name": "lunarvim-devcontainer", "service": "lvim", "dockerComposeFile": "d-c-lunarvim.yml", "mounts": [ "source=${localEnv:HOME}/.bashrc,target=/home/lunaruser/.bashrc,type=bind", "source=lvim-cs-dependency-cache,target=/home/lunaruser/.elm,type=volume" ], "workspaceFolder": "/workspace", // In order to make elm-watch pick up changes "containerEnv": { "CHOKIDAR_USEPOLLING": "true" }, // Configure tool-specific properties. "customizations": { // Configure properties specific to VS Code. "vscode": { // Add the IDs of extensions you want installed when the container is created. "extensions": [ "Elmtooling.elm-ls-vscode", "ritwickdey.LiveServer", "streetsidesoftware.code-spell-checker", "GitHub.copilot-chat", "GitHub.copilot", "eamodio.gitlens", "elmTooling.elm-ls-vscode", "kisstkondoros.vscode-gutter-preview", "mongodb.mongodb-vscode" ] } } } 

# Use a stable version of Alpine as the base image FROM alpine:3.20.3 # Set up the working directory WORKDIR /tmp # Set environment variables ENV HOME_DIR="/home/lunaruser" ENV LV_BRANCH="release-1.4/neovim-0.9" ENV PATH="$PATH:$HOME_DIR/.local/bin" # Install dependencies RUN apk update && \ apk add --no-cache \ yarn \ git \ python3 \ cargo \ neovim \ xclip \ ripgrep \ alpine-sdk \ bash \ curl \ nodejs \ npm \ sudo \ libc6-compat # Install if needed for compatibility with Elm binaries # Configuring Elm version ARG ELM_VERSION=latest-0.19.1 ARG ELM_TEST_VERSION=latest-0.19.1 ARG ELM_FORMAT_VERSION=latest-0.19.1 # This Dockerfile adds a non-root user with sudo access. ARG USERNAME=lunaruser ARG USER_UID=1000 ARG USER_GID=$USER_UID # Add a non-root user and group RUN addgroup -S $USERNAME && \ adduser -S $USERNAME -G $USERNAME --shell /bin/sh # Install Elm using the provided method, elm-test and elm-format via npm RUN export DEBIAN_FRONTEND=noninteractive && \ # Install Elm binary curl -L -o elm.gz https://github.com/elm/compiler/releases/download/0.19.1/binary-for-linux-64-bit.gz && \ gunzip elm.gz && \ chmod +x elm && \ mv elm /usr/local/bin/elm && \ # Install elm-test and elm-format via npm npm install --global \ elm-test@${ELM_TEST_VERSION} \ elm-format@${ELM_FORMAT_VERSION} \ elm-watch@beta && \ # [Optional] Update UID/GID if needed if [ "$USER_GID" != "1000" ] || [ "$USER_UID" != "1000" ]; then \ groupmod --gid $USER_GID $USERNAME && \ usermod --uid $USER_UID --gid $USER_GID $USERNAME && \ chown -R $USER_UID:$USER_GID /home/$USERNAME; \ fi && \ # Create the elm cache directory where we can mount a volume mkdir /home/$USERNAME/.elm && \ chown $USERNAME:$USERNAME /home/$USERNAME/.elm # Switch to the non-root user USER $USERNAME # Run LunarVim installation as the non-root user RUN curl -s https://raw.githubusercontent.com/lunarvim/lunarvim/$LV_BRANCH/utils/installer/install.sh | \ bash -s -- --no-install-dependencies # Define the volume for the .bashrc file VOLUME /home/lunaruser/ # Set default command to open LunarVim - when running directly in a docker container # CMD ["/home/lunaruser/.local/bin/lvim"] 

{ "liveServer.settings.root": "/wwwroot", "editor.formatOnSave": true, "files.autoSave": "onFocusChange", "editor.defaultFormatter": "elmTooling.elm-ls-vscode" } 

lvim.format_on_save.enabled = true lvim.format_on_save.allow_filetypes = { "elm" } local formatters = require ("lvim.lsp.null-ls.formatters") formatters.setup({ { exe = "elm-format", filetypes = { "elm" }, } })