efm-langserver

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  "desc": "General purpose Language Server",
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  "full_name": "efm-langserver",
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  "github_last_commit_at": "2026-03-08T02:08:41Z",
  "github_readme_excerpt": "# efm-langserver\n\n[![Actions Status](https://github.com/mattn/efm-langserver/workflows/CI/badge.svg)](https://github.com/mattn/efm-langserver/actions)\n\nGeneral purpose Language Server that can use specified error message format\ngenerated from specified command. This is useful for editing code with linter.\n\n![efm](https://raw.githubusercontent.com/mattn/efm-langserver/master/screenshot.png)\n\n* [Installation](#installation)\n* [Usage](#usage)\n  + [Configuration](#configuration)\n    - [InitializeParams](#initializeparams)\n  + [Example for config.yaml](#example-for-configyaml)\n  + [Example for DidChangeConfiguration notification](#example-for-didchangeconfiguration-notification)\n* [Client Setup](#client-setup)\n  + [Configuration for vim-lsp](#configuration-for-vim-lsp)\n  + [Configuration for coc.nvim](#configuration-for-cocnvim)\n  + [Configuration for Eglot (Emacs)](#configuration-for-eglot)\n  + [Configuration for neovim builtin LSP with nvim-lspconfig](#configuration-for-neovim-builtin-lsp-with-nvim-lspconfig)\n  + [Configuration for Helix](#configuration-for-helix)\n  + [Configuration for VSCode](#configuration-for-vscode)\n* [License](#license)\n* [Author](#author)\n\n## Installation\n\n```console\ngo install github.com/mattn/efm-langserver@latest\n```\n\nor via [Homebrew](https://brew.sh/):\n```console\nbrew install efm-langserver\n```\n\n## Usage\n\n```text\nUsage of efm-langserver:\n  -c string\n        path to config.yaml\n  -d    dump configuration\n  -logfile string\n        logfile\n  -loglevel int\n        loglevel (default 1)\n  -q    Run quieter\n  -v    Print the version\n```\n\n### Configuration\n\nConfiguration can be done with either a `config.yaml` file, or through\na [DidChangeConfiguration](https://microsoft.github.io/language-server-protocol/specification.html#workspace_didChangeConfiguration)\nnotification from the client.\n`DidChangeConfiguration` can be called any time and will overwrite only provided\nproperties.\n\n`DidChangeConfiguration` only supports V2 configuration and cannot set",
  "github_repo": "mattn/efm-langserver",
  "github_stars": 1543,
  "github_topics": [
    "go",
    "golang",
    "langserver",
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  "homepage": "https://github.com/mattn/efm-langserver",
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  "license": "MIT",
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  "llm_model": null,
  "name": "efm-langserver",
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  "ruby_source_path": "Formula/e/efm-langserver.rb",
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  "version_head": "HEAD",
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