Open Source Language Servers - Page 2
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JupyterLab LSP
Coding assistance for JupyterLab (code navigation + hover suggestions
Hover over any piece of code; if an underline appears, you can press Ctrl to get a tooltip with function/class signature, module documentation or any other piece of information that the language server provides. Critical errors have red underline, warnings are orange, etc. Hover over the underlined code to see a more detailed message. Use the context menu entry, or Alt + 🖱️ to jump to definitions/references (you can change it to Ctrl/⌘ in settings); use Alt + o to jump back. Place your cursor on a variable, function, etc and all the usages will be highlighted. When a kernel is available the suggestions from the kernel (such as keys of a dict and columns of a DataFrame) are merged with the suggestions from the Language Server (in notebook). If the kernel is too slow to respond promptly only the Language Server suggestions will be shown (default threshold: 0.6s). You can configure the completer to not attempt to fetch the kernel completions if the kernel is busy. -
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LSP-AI
LSP-AI is an open-source language server
LSP-AI is an open source language server that serves as a backend for AI-powered functionality in your favorite code editors. It offers features like in-editor chatting with LLMs and code completions. Because it is a language server, it works with any editor that has LSP support. -
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Language Server Protocol for Emacs
Emacs client/library for the language server protocol
Client for Language Server Protocol (v3.14). lsp-mode aims to provide IDE-like experience by providing optional integration with the most popular Emacs packages like company, flycheck and projectile. Works out of the box and automatically upgrades if additional packages are present. Choose between full-blown IDE with flashy UI or minimal distraction-free. Supports all features in Language Server Protocol v3.14. Semantic tokens as defined by LSP 3.16 (compatible language servers include recent development builds of clangd and rust-analyzer). If LSP server supports completion, lsp-mode use symbols returned by the server to present the user when completion is triggered via completion-at-point. For UI feedback of the available code actions, you can enable lsp-modeline-code-actions-mode which shows available code actions on modeline. -
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Metals
Scala language server with rich IDE features
Scala language server with rich IDE features. -
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Microsoft Python Language Server
Microsoft Language Server for Python
Microsoft Python Language Server implements the Language Server Protocol. Its primary clients are the Python extension for VS Code and Python Tools for Visual Studio. Feel free to file issues or ask questions on our issue tracker, and we welcome code contributions. Linting can be controlled via the user configuration. In VS Code, this is settings.json. To control the visibility and severity of the diagnotics, there are a number of lists that can be set in the user configuration which make use of each diagnostic's error code. During analysis language server produces Python code from compiled modules and builtins which is similar to Python module stubs. It may also produce database files holding module analysis for faster retrieval later. -
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Nim Language Server Protocol
Language Server Protocol implementation for Nim
This is a Language Server Protocol implementation in Nim, for Nim. It is based on nimsuggest, which means that every editor that supports LSP will now have the same quality of suggestions that has previously only been available in supported editors. This will compile and install it in the nimble binary directory, which if you have set up nimble correctly it should be in your path. When compiling and using nimlsp it needs to have Nim's sources available in order to work. With Nim installed through choosenim these should already be on your system and nimlsp should be able to find and use them automatically. However, if you have installed nimlsp in a different way you might run into issues where it can't find certain files during compilation/running. To fix this you need to grab a copy of Nim sources and then point nimlsp at them on compile-time by using -d:explicitSourcePath=PATH, where PATH is where you have your Nim sources. -
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Objeck
Objeck is a modern object-oriented programming language
General-purpose object-oriented and functional programming language. Designed to be intuitive, lightweight, cross-platform and fast. The Objeck compiler produces two types of binaries. The first is an executable and the second type is a library. Libraries can be linked into executables by passing the names of libraries to the compiler. Objeck can be built for a variety of targets. The language is implemented in C++, assembly (i.e., generated machine code) and assisted by code generators for bindings to SDL2 and GTK 3/4. -
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Psalm
A static analysis tool for finding errors in PHP applications
It’s easy to make great things in PHP, but bugs can creep in just as easily. Psalm is a free & open-source static analysis tool that helps you identify problems in your code, so you can sleep a little better. Psalm helps people maintain a wide variety of codebases, large and small, ancient and modern. On its strictest setting it can help you prevent almost all type-related runtime errors, and enables you to take advantage of safe coding patterns popular in other languages. Psalm also fixes bugs automatically, allowing you to improve your code without breaking a sweat. If Psalm cannot infer a type for an expression then it uses a mixed placeholder type. mixed types can sometimes mask bugs, so keeping track of them helps you avoid a number of common pitfalls. Psalm has a Language Server that’s compatible with a range of different IDEs. Psalm can fix many of the issues it finds automatically. -
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Python LSP Server
Fork of the python-language-server project
Fork of the python-language-server project, maintained by the Spyder IDE team and the community. A Python 3.7+ implementation of the Language Server Protocol. The base language server requires Jedi to provide Completions, Definitions, Hover, References, Signature Help, and Symbols. Like all language servers, the configuration can be passed from the client that talks to this server (i.e. your editor/IDE or another tool that has the same purpose). The details of how this is done depend on the editor or plugin that you are using to communicate with python-lsp-server. The configuration options are available at that level are documented in CONFIGURATION.md. Overall configuration is computed first from user configuration (in home directory), overridden by configuration passed in by the language client, and then overridden by configuration discovered in the workspace. -
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Swift Package Manager Project
The package manager for the Swift Programming Language
The Swift Package Manager is a tool for managing distribution of source code, aimed at making it easy to share your code and reuse others’ code. The tool directly addresses the challenges of compiling and linking Swift packages, managing dependencies, versioning, and supporting flexible distribution and collaboration models. We’ve designed the system to make it easy to share packages on services like GitHub, but packages are also great for private personal development, sharing code within a team, or at any other granularity. Swift Package Manager includes a build system that can build for macOS and Linux. Starting with Xcode 11, Xcode integrates with SwiftPM to provide support for including packages in iOS, macOS, watchOS, and tvOS applications. The SourceKit-LSP project leverages libSwiftPM and provides Language Server Protocol implementation for editors that support LSP. -
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TOTVS Developer Studio para VSCode
Totvs Developer Studio for vscode
The TOTVS Developer Studio for VS Code extension provides a development suite for the Protheus/Logix ecosystem. Using the LSP ( Language Server Protocol ) and DAP ( Debug Adapter Protocol ) communication protocols , both widely used and extensible to other IDEs on the market, such as Atom, Visual Studio, Eclipse, Eclipse Theia, Vim and Emacs. When starting VS Code with the TDS-VSCode extension installed, open (or create) the main folder that contains (or will contain) your source and resource files. We had reports of encode problems opening fonts previously saved in TDS, this is because the original VSCode encode is UTF8 and the TDS-VSCode encode is another one. -
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Terraform LSP
Language Server Protocol for Terraform
Currently, there are two Terraform LSP repositories one of which is this repository and one of which is terraform-ls. Terraform-LS also contains details about this repository as well. The aim to have a unified lsp for Terraform in the future, but for now there is two concurrent development with collaboration to each other, this repo is aim for more experimental features, and the terraform-ls is aimed for stableness. -
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Typst LSP
A brand-new language server for Typst, plus a VS Code extension
A brand-new language server for Typst. Syntax highlighting, error reporting, code completion, and function signature help. Compiles to PDF on save (configurable to as-you-type, or can be disabled) -
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Woke
Woke is a Python-based development and testing framework for Solidity
Woke is a Python-based development and testing framework for Solidity. A testing framework for Solidity smart contracts with Python-native equivalents of Solidity types and blazing-fast execution. A property-based fuzzer for Solidity smart contracts that allows testers to write their fuzz tests in Python. See examples and documentation for more information. Fuzzer builds on top of the testing framework and allows efficient fuzz testing of Solidity smart contracts. Woke implements an LSP server for Solidity. The only currently supported communication channel is TCP. -
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cquery
C/C++ language server supporting multi-million line code base
C/C++ language server supporting multi-million line code base, powered by libclang. Emacs, Vim, VSCode, and others with language server protocol support. Cross-references, completion, diagnostics, semantic highlighting, and more. cquery is a highly-scalable, low-latency language server for C/C++/Objective-C. It is tested and designed for large codebases like Chromium. cquery provides accurate and fast semantic analysis without interrupting workflow. cquery implements almost the entire language server protocol and provides some extra features to boot. cquery is able to respond to queries quickly because it caches a huge amount of information. When a request comes in, cquery just looks it up in the cache without running many computations. As a result, there's a large memory overhead. For example, a full index of Chrome will take about 10gb of memory. If you exclude v8, webkit, and third_party, it goes down to about 6.5gb. -
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crystalline
A Language Server Protocol implementation for Crystal
Crystalline is an implementation of the Language Server Protocol written in and for the Crystal Language. It aims to provide limited language features (like go-to, autocompletion, syntax and semantic checking) and ease development with any compatible code editor. Crystalline is not as extensive in terms of features as other Language Servers but still provides very convenient tools. Code Diagnostics. Syntax and semantic checks on save. Limited Autocompletion. List (depending on the target) method definitions, macros or module/class/struct names or symbols available in the current context. A whole document or a text selection. By clicking on a symbol with the Cmd or Ctrl key pressed (editor/platform dependent). Hovering should display (when possible) either a variable type, a function definition signature or the expanded macro. -
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glsl-language-server
Language server implementation for GLSL
Language server implementation for GLSL. Currently, this LSP implementation can be interfaced with using either HTTP or Studio. You can run glslls to use an HTTP server to handle IO. Alternatively, run glslls --stdin to handle IO on stdin. lsp-mode has this language server integrated into the core. This assumes you have glsl-mode installed. -
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This is HTTP server created with Bourne shell language. Server executed by inetd internet super-server for accept network connections.
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nil
NIx Language server, an incremental analysis assistent
NIx Language server, an incremental analysis assistant for writing in Nix. This repo is also packaged via Nix flakes. The language server package is available in the default flake output github:oxalica/nil#, under bin/nil. To install, run nix profile install github:oxalica/nil. Alternatively, you can use this repository as a flake input, and add its output to your own flake-managed system-wide and/or home configurations. We are officially supported by nvim-lspconfig, see upstream docs, also the example config for testing. -
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vim-lsp
async language server protocol plugin for vim and neovim
vim-lsp is a Language Server Protocol client for Vim 8 and Neovim that brings modern IDE-style features into a lightweight editor. It uses Vim’s async jobs and timers (or Neovim’s RPC) to talk to external language servers without blocking the UI. Integrates with external completion frameworks for omnifunc/completion menus. With a server configured, you get go-to-definition, hover docs, signature help, references, rename, code actions, and diagnostics. It is designed to be minimal and extensible, often paired with completion plugins like asyncomplete or others for a full experience. Works with many language servers via simple server configuration blocks. The project aims to stay close to the LSP spec while exposing familiar Vim commands and mappings. It allows per-project or per-filetype setups, so multiple languages can be enabled side by side.
