# Install efm-langserver with Homebrew, apk, apt, MacPorts, Nix, zypper General purpose Language Server. Version 0.0.57 via Homebrew; verified 2026-07-25. Also installable with debian: sudo apt install efm-langserver. ## Install ```sh sudo av install brew:efm-langserver ``` Additional install commands: ### macOS - Homebrew (100%): ```sh brew install efm-langserver ``` Evidence: local Homebrew formula metadata - MacPorts (94%): ```sh sudo port install efm-langserver ``` Evidence: MacPorts ports tree: devel/efm-langserver/Portfile from https://api.github.com/repos/macports/macports-ports/git/trees/master?recursive=1 ### Linux - apk (92%): ```sh sudo apk add efm-langserver ``` Evidence: Alpine Linux edge package indexes: efm-langserver from https://dl-cdn.alpinelinux.org/alpine/edge/community/x86_64/APKINDEX.tar.gz - Debian apt (92%): ```sh sudo apt install efm-langserver ``` Evidence: Debian stable package indexes: efm-langserver from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz - Nix (92%): ```sh nix profile install nixpkgs#efm-langserver ``` Evidence: nixpkgs package indexes: pkgs/by-name/ef/efm-langserver/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1 - zypper (92%): ```sh sudo zypper install efm-langserver ``` Evidence: openSUSE Tumbleweed package metadata: efm-langserver from https://download.opensuse.org/tumbleweed/repo/oss/repodata/50b07339cb64c8ed4091bdbabddadc1ff5737b090e478818a195b40d8a3292861a879139b4a3987c31109699fde9fbf4a716367ddf4eef77da75f96e3193d6ed-primary.xml.zst ## Package facts - **Package key:** brew:efm-langserver - **Package manager:** Homebrew - **Package manager page:** - **Version:** 0.0.57 - **Source summary:** General purpose Language Server - **Homepage:** - **Repository:** - **License:** MIT - **Source archive:** - **Last updated:** 2026-07-25T14:23:18-04:00 - **Generated:** 2026-08-04T22:13:35+00:00 ## Executables - efm-langserver (cli) - efm-langserver (alias) ## Build dependencies - go ## Install behavior - Post-install hook: not defined - Bottle: available on arm64_linux, arm64_sequoia, arm64_sonoma, arm64_tahoe, sonoma, x86_64_linux ## Freshness - Page generated: 2026-08-04 - Package-manager version: 0.0.57 - Package-manager updated: 2026-07-25 - Local data: ok - Upstream repository: https://github.com/mattn/efm-langserver - Upstream latest detected: v0.0.57 (current) ## Project history and usage efm-langserver is a general-purpose Language Server Protocol bridge for external linters, formatters, hover commands, completion commands, and other command-line tools. ### Project history The public repository was created in 2019 by mattn. Its README describes a language server that parses error-message formats from configured commands, which lets editors consume ordinary CLI linting and formatting tools through LSP. ### Adoption history The project grew with the editor shift toward LSP clients. Its README includes setup examples for vim-lsp, coc.nvim, Emacs Eglot, Neovim built-in LSP via nvim-lspconfig, Helix, and VSCode, showing adoption across several editor families. ### How it is used Users install efm-langserver, create config.yaml, and map languages to external commands. The server does not bundle the linters or formatters; users install tools such as yapf, isort, markdownlint-cli, jq, eslint, black, mypy, or prettier separately. Configuration can come from a config.yaml file or from LSP DidChangeConfiguration notifications, with documented Unix and Windows default paths. ### Why package nerds care efm-langserver matters in package metadata because it is glue: one binary can expose many existing command-line tools to any LSP-capable editor, reducing the need for per-editor integrations. ### Timeline - 2019: Public GitHub repository created. - 2026: v0.0.56 published. ### Related projects - Related projects are the Language Server Protocol itself, vim-lsp, coc.nvim, Eglot, nvim-lspconfig, Helix, VSCode, and the many external linters and formatters configured behind efm-langserver. ### Sources - - - - ## Security Notes broad file, network, media, or database tool signal. - **Geiger risk:** blue / medium - broad file, network, media, or database tool signal ## Configuration and credential file locations These source-backed paths show where this package keeps local settings or durable credentials. Automic Vault can use them as review targets for secret scanning, migration, and command approval. ## Configuration files - Unix: $XDG_CONFIG_HOME/efm-langserver/config.yaml, ~/.config/efm-langserver/config.yaml - Windows: %APPDATA%\efm-langserver\config.yaml ## Source Database Details - **Source Database:** Homebrew formula API - **Tap:** homebrew/core - **Full Name:** efm-langserver - **Version Scheme:** 0 - **Revision:** 0 - **Head Version:** HEAD - **Bottle Stable Root URL:** - **Deprecated:** no - **Disabled:** no - **Keg Only:** no - **URL Keys:** head, stable ## Other Package-Manager Records - Debian apt - efm-langserver - 0.0.54-1+b4: normalized package name match | Debian stable package indexes: efm-langserver from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz | General purpose Language Server (program) | https://github.com/mattn/efm-langserver - Nix - efm-langserver: normalized package name match | nixpkgs package indexes: pkgs/by-name/ef/efm-langserver/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1 - Ubuntu apt - efm-langserver - 0.0.50-1: normalized package name match | Ubuntu 24.04 LTS package indexes: efm-langserver from https://archive.ubuntu.com/ubuntu/dists/noble/universe/binary-amd64/Packages.gz | General purpose Language Server (program) | https://github.com/mattn/efm-langserver - apk - efm-langserver - 0.0.57-r1: normalized package name match | Alpine Linux edge package indexes: efm-langserver from https://dl-cdn.alpinelinux.org/alpine/edge/community/x86_64/APKINDEX.tar.gz | General purpose language server | https://github.com/mattn/efm-langserver - apk - efm-langserver-doc - 0.0.57-r1: normalized package name match | Alpine Linux edge package indexes: efm-langserver-doc from https://dl-cdn.alpinelinux.org/alpine/edge/community/x86_64/APKINDEX.tar.gz | General purpose language server (documentation) | https://github.com/mattn/efm-langserver - zypper - efm-langserver - 0.0.54-1.8: normalized package name match | openSUSE Tumbleweed package metadata: efm-langserver from https://download.opensuse.org/tumbleweed/repo/oss/repodata/50b07339cb64c8ed4091bdbabddadc1ff5737b090e478818a195b40d8a3292861a879139b4a3987c31109699fde9fbf4a716367ddf4eef77da75f96e3193d6ed-primary.xml.zst | General purpose language server | https://github.com/mattn/efm-langserver - MacPorts - efm-langserver: normalized package name match | MacPorts ports tree: devel/efm-langserver/Portfile from https://api.github.com/repos/macports/macports-ports/git/trees/master?recursive=1 ## Related links - [Source-control packages](https://pkg.so/source-control-tools/) - Belongs to a source-control command family. - [Secret-risk packages](https://pkg.so/secret-risk-packages/) - Has protected-tool coverage, approval-gate, or non-low Geiger security signals. - [Terminal utility packages](https://pkg.so/terminal-utilities/) - Matched terminal and command-line workflow metadata. - [Text processing packages](https://pkg.so/text-processing-tools/) - Matched text, document, or structured-data processing metadata. - [go](https://pkg.so/brew/go/) - Build dependency declared by Homebrew. - [fish-lsp](https://pkg.so/brew/fish-lsp/) - Shares pkgdb curated category or tags: cli, developer-tools, editor-integration, formatting, language-server. - [gopls](https://pkg.so/brew/gopls/) - Shares pkgdb curated category or tags: cli, developer-tools, editor-integration, language-server, lsp. - [python-lsp-server](https://pkg.so/brew/python-lsp-server/) - Shares pkgdb curated category or tags: cli, developer-tools, editor-integration, language-server, lsp. - [codebook-lsp](https://pkg.so/brew/codebook-lsp/) - Shares pkgdb curated category or tags: cli, developer-tools, editor-integration, language-server, lsp. - [expert](https://pkg.so/brew/expert/) - Shares pkgdb curated category or tags: cli, developer-tools, editor-integration, language-server, lsp. - [pkl-lsp](https://pkg.so/brew/pkl-lsp/) - Shares pkgdb curated category or tags: cli, developer-tools, editor-integration, language-server, lsp. - [jq-lsp](https://pkg.so/brew/jq-lsp/) - Shares pkgdb curated category or tags: cli, developer-tools, editor-integration, language-server, lsp. - [actions-languageserver](https://pkg.so/brew/actions-languageserver/) - Shares pkgdb curated category or tags: cli, developer-tools, editor-integration, language-server, lsp. - [dhall-lsp-server](https://pkg.so/brew/dhall-lsp-server/) - Local metadata places this package in an adjacent workflow. Shared terms: cli, developer, developer-tools, editor, editor-integration. ## Combined YAML source View the package source record on GitHub. [combined/efm-langserver.yml](https://github.com/mxcl/pkgdb/blob/main/combined/efm-langserver.yml) ## Sources - pkg.so package database - Geiger risk classifier - package-page enrichment - curated configuration and credential file locations - curated package history - package version freshness - pkgdb category and tag curation - package relationship graph - external package-manager database matches - cross-ecosystem install command graph