import { spawn, type ChildProcessWithoutNullStreams } from "child_process"

import path from "path"

import os from "os"

import { Global } from "../global"

import { Log } from "../util/log"

import { BunProc } from "../bun"

import { $, readableStreamToText } from "bun"

import fs from "fs/promises"

import { Filesystem } from "../util/filesystem"

import { Instance } from "../project/instance"

import { Flag } from "../flag/flag"

import { Archive } from "../util/archive"

export namespace LSPServer {

const log = Log.create({ service: "lsp.server" })

const pathExists = async (p: string) =>

fs

.stat(p)

.then(() => true)

.catch(() => false)

export interface Handle {

process: ChildProcessWithoutNullStreams

initialization?: Record<string, any>

}

type RootFunction = (file: string) => Promise<string | undefined>

const NearestRoot = (includePatterns: string[], excludePatterns?: string[]): RootFunction => {

return async (file) => {

if (excludePatterns) {

const excludedFiles = Filesystem.up({

targets: excludePatterns,

start: path.dirname(file),

stop: Instance.directory,

})

const excluded = await excludedFiles.next()

await excludedFiles.return()

if (excluded.value) return undefined

}

const files = Filesystem.up({

targets: includePatterns,

start: path.dirname(file),

stop: Instance.directory,

})

const first = await files.next()

await files.return()

if (!first.value) return Instance.directory

return path.dirname(first.value)

}

}

export interface Info {

id: string

extensions: string[]

global?: boolean

root: RootFunction

spawn(root: string): Promise<Handle | undefined>

}

export const Deno: Info = {

id: "deno",

root: async (file) => {

const files = Filesystem.up({

targets: ["deno.json", "deno.jsonc"],

start: path.dirname(file),

stop: Instance.directory,

})

const first = await files.next()

await files.return()

if (!first.value) return undefined

return path.dirname(first.value)

},

extensions: [".ts", ".tsx", ".js", ".jsx", ".mjs"],

async spawn(root) {

const deno = Bun.which("deno")

if (!deno) {

log.info("deno not found, please install deno first")

return

}

return {

process: spawn(deno, ["lsp"], {

cwd: root,

}),

}

},

}

export const Typescript: Info = {

id: "typescript",

root: NearestRoot(

["package-lock.json", "bun.lockb", "bun.lock", "pnpm-lock.yaml", "yarn.lock"],

["deno.json", "deno.jsonc"],

),

extensions: [".ts", ".tsx", ".js", ".jsx", ".mjs", ".cjs", ".mts", ".cts"],

async spawn(root) {

const tsserver = await Bun.resolve("typescript/lib/tsserver.js", Instance.directory).catch(() => {})

log.info("typescript server", { tsserver })

if (!tsserver) return

const proc = spawn(BunProc.which(), ["x", "typescript-language-server", "--stdio"], {

cwd: root,

env: {

...process.env,

BUN_BE_BUN: "1",

},

})

return {

process: proc,

initialization: {

tsserver: {

path: tsserver,

},

},

}

},

}

export const Vue: Info = {

id: "vue",

extensions: [".vue"],

root: NearestRoot(["package-lock.json", "bun.lockb", "bun.lock", "pnpm-lock.yaml", "yarn.lock"]),

async spawn(root) {

let binary = Bun.which("vue-language-server")

const args: string[] = []

if (!binary) {

const js = path.join(

Global.Path.bin,

"node_modules",

"@vue",

"language-server",

"bin",

"vue-language-server.js",

)

if (!(await Bun.file(js).exists())) {

if (Flag.OPENCODE_DISABLE_LSP_DOWNLOAD) return

await Bun.spawn([BunProc.which(), "install", "@vue/language-server"], {

cwd: Global.Path.bin,

env: {

...process.env,

BUN_BE_BUN: "1",

},

stdout: "pipe",

stderr: "pipe",

stdin: "pipe",

}).exited

}

binary = BunProc.which()

args.push("run", js)

}

args.push("--stdio")

const proc = spawn(binary, args, {

cwd: root,

env: {

...process.env,

BUN_BE_BUN: "1",

},

})

return {

process: proc,

initialization: {

// Leave empty; the server will auto-detect workspace TypeScript.

},

}

},

}

export const ESLint: Info = {

id: "eslint",

root: NearestRoot(["package-lock.json", "bun.lockb", "bun.lock", "pnpm-lock.yaml", "yarn.lock"]),

extensions: [".ts", ".tsx", ".js", ".jsx", ".mjs", ".cjs", ".mts", ".cts", ".vue"],

async spawn(root) {

const eslint = await Bun.resolve("eslint", Instance.directory).catch(() => {})

if (!eslint) return

log.info("spawning eslint server")

const serverPath = path.join(Global.Path.bin, "vscode-eslint", "server", "out", "eslintServer.js")

if (!(await Bun.file(serverPath).exists())) {

if (Flag.OPENCODE_DISABLE_LSP_DOWNLOAD) return

log.info("downloading and building VS Code ESLint server")

const response = await fetch("https://github.com/microsoft/vscode-eslint/archive/refs/heads/main.zip")

if (!response.ok) return

const zipPath = path.join(Global.Path.bin, "vscode-eslint.zip")

await Bun.file(zipPath).write(response)

const ok = await Archive.extractZip(zipPath, Global.Path.bin)

.then(() => true)

.catch((error) => {

log.error("Failed to extract vscode-eslint archive", { error })

return false

})

if (!ok) return

await fs.rm(zipPath, { force: true })

const extractedPath = path.join(Global.Path.bin, "vscode-eslint-main")

const finalPath = path.join(Global.Path.bin, "vscode-eslint")

const stats = await fs.stat(finalPath).catch(() => undefined)

if (stats) {

log.info("removing old eslint installation", { path: finalPath })

await fs.rm(finalPath, { force: true, recursive: true })

}

await fs.rename(extractedPath, finalPath)

const npmCmd = process.platform === "win32" ? "npm.cmd" : "npm"

await $`${npmCmd} install`.cwd(finalPath).quiet()

await $`${npmCmd} run compile`.cwd(finalPath).quiet()

log.info("installed VS Code ESLint server", { serverPath })

}

const proc = spawn(BunProc.which(), [serverPath, "--stdio"], {

cwd: root,

env: {

...process.env,

BUN_BE_BUN: "1",

},

})

return {

process: proc,

}

},

}

export const Oxlint: Info = {

id: "oxlint",

root: NearestRoot([

".oxlintrc.json",

"package-lock.json",

"bun.lockb",

"bun.lock",

"pnpm-lock.yaml",

"yarn.lock",

"package.json",

]),

extensions: [".ts", ".tsx", ".js", ".jsx", ".mjs", ".cjs", ".mts", ".cts", ".vue", ".astro", ".svelte"],

async spawn(root) {

const ext = process.platform === "win32" ? ".cmd" : ""

const serverTarget = path.join("node_modules", ".bin", "oxc_language_server" + ext)

const lintTarget = path.join("node_modules", ".bin", "oxlint" + ext)

const resolveBin = async (target: string) => {

const localBin = path.join(root, target)

if (await Bun.file(localBin).exists()) return localBin

const candidates = Filesystem.up({

targets: [target],

start: root,

stop: Instance.worktree,

})

const first = await candidates.next()

await candidates.return()

if (first.value) return first.value

return undefined

}

let lintBin = await resolveBin(lintTarget)

if (!lintBin) {

const found = Bun.which("oxlint")

if (found) lintBin = found

}

if (lintBin) {

const proc = Bun.spawn([lintBin, "--help"], { stdout: "pipe" })

await proc.exited

const help = await readableStreamToText(proc.stdout)

if (help.includes("--lsp")) {

return {

process: spawn(lintBin, ["--lsp"], {

cwd: root,

}),

}

}

}

let serverBin = await resolveBin(serverTarget)

if (!serverBin) {

const found = Bun.which("oxc_language_server")

if (found) serverBin = found

}

if (serverBin) {

return {

process: spawn(serverBin, [], {

cwd: root,

}),

}

}

log.info("oxlint not found, please install oxlint")

return

},

}

export const Biome: Info = {

id: "biome",

root: NearestRoot([

"biome.json",

"biome.jsonc",

"package-lock.json",

"bun.lockb",

"bun.lock",

"pnpm-lock.yaml",

"yarn.lock",

]),

extensions: [

".ts",

".tsx",

".js",

".jsx",

".mjs",

".cjs",

".mts",

".cts",

".json",

".jsonc",

".vue",

".astro",

".svelte",

".css",

".graphql",

".gql",

".html",

],

async spawn(root) {

const localBin = path.join(root, "node_modules", ".bin", "biome")

let bin: string | undefined

if (await Bun.file(localBin).exists()) bin = localBin

if (!bin) {

const found = Bun.which("biome")

if (found) bin = found

}

let args = ["lsp-proxy", "--stdio"]

if (!bin) {

const resolved = await Bun.resolve("biome", root).catch(() => undefined)

if (!resolved) return

bin = BunProc.which()

args = ["x", "biome", "lsp-proxy", "--stdio"]

}

const proc = spawn(bin, args, {

cwd: root,

env: {

...process.env,

BUN_BE_BUN: "1",

},

})

return {

process: proc,

}

},

}

export const Gopls: Info = {

id: "gopls",

root: async (file) => {

const work = await NearestRoot(["go.work"])(file)

if (work) return work

return NearestRoot(["go.mod", "go.sum"])(file)

},

extensions: [".go"],

async spawn(root) {

let bin = Bun.which("gopls", {

PATH: process.env["PATH"] + path.delimiter + Global.Path.bin,

})

if (!bin) {

if (!Bun.which("go")) return

if (Flag.OPENCODE_DISABLE_LSP_DOWNLOAD) return

log.info("installing gopls")

const proc = Bun.spawn({

cmd: ["go", "install", "golang.org/x/tools/gopls@latest"],

env: { ...process.env, GOBIN: Global.Path.bin },

stdout: "pipe",

stderr: "pipe",

stdin: "pipe",

})

const exit = await proc.exited

if (exit !== 0) {

log.error("Failed to install gopls")

return

}

bin = path.join(Global.Path.bin, "gopls" + (process.platform === "win32" ? ".exe" : ""))

log.info(`installed gopls`, {

bin,

})

}

return {

process: spawn(bin!, {

cwd: root,

}),

}

},

}

export const Rubocop: Info = {

id: "ruby-lsp",

root: NearestRoot(["Gemfile"]),

extensions: [".rb", ".rake", ".gemspec", ".ru"],

async spawn(root) {

let bin = Bun.which("rubocop", {

PATH: process.env["PATH"] + path.delimiter + Global.Path.bin,

})

if (!bin) {

const ruby = Bun.which("ruby")

const gem = Bun.which("gem")

if (!ruby || !gem) {

log.info("Ruby not found, please install Ruby first")

return

}

if (Flag.OPENCODE_DISABLE_LSP_DOWNLOAD) return

log.info("installing rubocop")

const proc = Bun.spawn({

cmd: ["gem", "install", "rubocop", "--bindir", Global.Path.bin],

stdout: "pipe",

stderr: "pipe",

stdin: "pipe",

})

const exit = await proc.exited

if (exit !== 0) {

log.error("Failed to install rubocop")

return

}

bin = path.join(Global.Path.bin, "rubocop" + (process.platform === "win32" ? ".exe" : ""))

log.info(`installed rubocop`, {

bin,

})

}

return {

process: spawn(bin!, ["--lsp"], {

cwd: root,

}),

}

},

}

export const Ty: Info = {

id: "ty",

extensions: [".py", ".pyi"],

root: NearestRoot([

"pyproject.toml",

"ty.toml",

"setup.py",

"setup.cfg",

"requirements.txt",

"Pipfile",

"pyrightconfig.json",

]),

async spawn(root) {

if (!Flag.OPENCODE_EXPERIMENTAL_LSP_TY) {

return undefined

}

let binary = Bun.which("ty")

const initialization: Record<string, string> = {}

const potentialVenvPaths = [process.env["VIRTUAL_ENV"], path.join(root, ".venv"), path.join(root, "venv")].filter(

(p): p is string => p !== undefined,

)

for (const venvPath of potentialVenvPaths) {

const isWindows = process.platform === "win32"

const potentialPythonPath = isWindows

? path.join(venvPath, "Scripts", "python.exe")

: path.join(venvPath, "bin", "python")

if (await Bun.file(potentialPythonPath).exists()) {

initialization["pythonPath"] = potentialPythonPath

break

}

}

if (!binary) {

for (const venvPath of potentialVenvPaths) {

const isWindows = process.platform === "win32"

const potentialTyPath = isWindows

? path.join(venvPath, "Scripts", "ty.exe")

: path.join(venvPath, "bin", "ty")

if (await Bun.file(potentialTyPath).exists()) {

binary = potentialTyPath

break

}

}

}

if (!binary) {

log.error("ty not found, please install ty first")

return

}

const proc = spawn(binary, ["server"], {

cwd: root,

})

return {

process: proc,

initialization,

}

},

}

export const Pyright: Info = {

id: "pyright",

extensions: [".py", ".pyi"],

root: NearestRoot(["pyproject.toml", "setup.py", "setup.cfg", "requirements.txt", "Pipfile", "pyrightconfig.json"]),

async spawn(root) {

let binary = Bun.which("pyright-langserver")

const args = []

if (!binary) {

const js = path.join(Global.Path.bin, "node_modules", "pyright", "dist", "pyright-langserver.js")

if (!(await Bun.file(js).exists())) {

if (Flag.OPENCODE_DISABLE_LSP_DOWNLOAD) return

await Bun.spawn([BunProc.which(), "install", "pyright"], {

cwd: Global.Path.bin,

env: {

...process.env,

BUN_BE_BUN: "1",

},

}).exited

}

binary = BunProc.which()

args.push(...["run", js])

}

args.push("--stdio")

const initialization: Record<string, string> = {}

const potentialVenvPaths = [process.env["VIRTUAL_ENV"], path.join(root, ".venv"), path.join(root, "venv")].filter(

(p): p is string => p !== undefined,

)

for (const venvPath of potentialVenvPaths) {

const isWindows = process.platform === "win32"

const potentialPythonPath = isWindows

? path.join(venvPath, "Scripts", "python.exe")

: path.join(venvPath, "bin", "python")

if (await Bun.file(potentialPythonPath).exists()) {

initialization["pythonPath"] = potentialPythonPath

break

}

}

const proc = spawn(binary, args, {

cwd: root,

env: {

...process.env,

BUN_BE_BUN: "1",

},

})

return {

process: proc,

initialization,

}

},

}

export const ElixirLS: Info = {

id: "elixir-ls",

extensions: [".ex", ".exs"],

root: NearestRoot(["mix.exs", "mix.lock"]),

async spawn(root) {

let binary = Bun.which("elixir-ls")

if (!binary) {

const elixirLsPath = path.join(Global.Path.bin, "elixir-ls")

binary = path.join(

Global.Path.bin,

"elixir-ls-master",

"release",

process.platform === "win32" ? "language_server.bat" : "language_server.sh",

)

if (!(await Bun.file(binary).exists())) {

const elixir = Bun.which("elixir")

if (!elixir) {

log.error("elixir is required to run elixir-ls")

return

}

if (Flag.OPENCODE_DISABLE_LSP_DOWNLOAD) return

log.info("downloading elixir-ls from GitHub releases")

const response = await fetch("https://github.com/elixir-lsp/elixir-ls/archive/refs/heads/master.zip")

if (!response.ok) return

const zipPath = path.join(Global.Path.bin, "elixir-ls.zip")

await Bun.file(zipPath).write(response)

const ok = await Archive.extractZip(zipPath, Global.Path.bin)

.then(() => true)

.catch((error) => {

log.error("Failed to extract elixir-ls archive", { error })

return false

})

if (!ok) return

await fs.rm(zipPath, {

force: true,

recursive: true,

})

await $`mix deps.get && mix compile && mix elixir_ls.release2 -o release`

.quiet()

.cwd(path.join(Global.Path.bin, "elixir-ls-master"))

.env({ MIX_ENV: "prod", ...process.env })

log.info(`installed elixir-ls`, {

path: elixirLsPath,

})

}

}

return {

process: spawn(binary, {

cwd: root,

}),

}

},

}

export const Zls: Info = {

id: "zls",

extensions: [".zig", ".zon"],

root: NearestRoot(["build.zig"]),

async spawn(root) {

let bin = Bun.which("zls", {

PATH: process.env["PATH"] + path.delimiter + Global.Path.bin,

})

if (!bin) {

const zig = Bun.which("zig")

if (!zig) {

log.error("Zig is required to use zls. Please install Zig first.")

return

}

if (Flag.OPENCODE_DISABLE_LSP_DOWNLOAD) return

log.info("downloading zls from GitHub releases")

const releaseResponse = await fetch("https://api.github.com/repos/zigtools/zls/releases/latest")

if (!releaseResponse.ok) {

log.error("Failed to fetch zls release info")

return

}

const release = (await releaseResponse.json()) as any

const platform = process.platform

const arch = process.arch

let assetName = ""

let zlsArch: string = arch

if (arch === "arm64") zlsArch = "aarch64"

else if (arch === "x64") zlsArch = "x86_64"

else if (arch === "ia32") zlsArch = "x86"

let zlsPlatform: string = platform

if (platform === "darwin") zlsPlatform = "macos"

else if (platform === "win32") zlsPlatform = "windows"

const ext = platform === "win32" ? "zip" : "tar.xz"

assetName = `zls-${zlsArch}-${zlsPlatform}.${ext}`

const supportedCombos = [

"zls-x86_64-linux.tar.xz",

"zls-x86_64-macos.tar.xz",

"zls-x86_64-windows.zip",

"zls-aarch64-linux.tar.xz",

"zls-aarch64-macos.tar.xz",

"zls-aarch64-windows.zip",

"zls-x86-linux.tar.xz",

"zls-x86-windows.zip",

]

if (!supportedCombos.includes(assetName)) {

log.error(`Platform ${platform} and architecture ${arch} is not supported by zls`)

return

}

const asset = release.assets.find((a: any) => a.name === assetName)

if (!asset) {

log.error(`Could not find asset ${assetName} in latest zls release`)

return

}

const downloadUrl = asset.browser_download_url

const downloadResponse = await fetch(downloadUrl)

if (!downloadResponse.ok) {

log.error("Failed to download zls")

return

}

const tempPath = path.join(Global.Path.bin, assetName)

await Bun.file(tempPath).write(downloadResponse)

if (ext === "zip") {

const ok = await Archive.extractZip(tempPath, Global.Path.bin)

.then(() => true)

.catch((error) => {

log.error("Failed to extract zls archive", { error })

return false

})

if (!ok) return

} else {

await $`tar -xf ${tempPath}`.cwd(Global.Path.bin).quiet().nothrow()

}

await fs.rm(tempPath, { force: true })

bin = path.join(Global.Path.bin, "zls" + (platform === "win32" ? ".exe" : ""))

if (!(await Bun.file(bin).exists())) {

log.error("Failed to extract zls binary")

return

}

if (platform !== "win32") {

await $`chmod +x ${bin}`.quiet().nothrow()

}

log.info(`installed zls`, { bin })

}

return {

process: spawn(bin, {

cwd: root,

}),

}

},

}

export const CSharp: Info = {

id: "csharp",

root: NearestRoot([".slnx", ".sln", ".csproj", "global.json"]),

extensions: [".cs"],

async spawn(root) {

let bin = Bun.which("csharp-ls", {

PATH: process.env["PATH"] + path.delimiter + Global.Path.bin,

})

if (!bin) {

if (!Bun.which("dotnet")) {

log.error(".NET SDK is required to install csharp-ls")

return

}

if (Flag.OPENCODE_DISABLE_LSP_DOWNLOAD) return

log.info("installing csharp-ls via dotnet tool")

const proc = Bun.spawn({

cmd: ["dotnet", "tool", "install", "csharp-ls", "--tool-path", Global.Path.bin],

stdout: "pipe",

stderr: "pipe",

stdin: "pipe",

})

const exit = await proc.exited

if (exit !== 0) {

log.error("Failed to install csharp-ls")

return

}

bin = path.join(Global.Path.bin, "csharp-ls" + (process.platform === "win32" ? ".exe" : ""))

log.info(`installed csharp-ls`, { bin })

}

return {

process: spawn(bin, {

cwd: root,

}),

}

},

}

export const FSharp: Info = {

id: "fsharp",

root: NearestRoot([".slnx", ".sln", ".fsproj", "global.json"]),

extensions: [".fs", ".fsi", ".fsx", ".fsscript"],

async spawn(root) {

let bin = Bun.which("fsautocomplete", {

PATH: process.env["PATH"] + path.delimiter + Global.Path.bin,

})

if (!bin) {

if (!Bun.which("dotnet")) {

log.error(".NET SDK is required to install fsautocomplete")

return

}

if (Flag.OPENCODE_DISABLE_LSP_DOWNLOAD) return

log.info("installing fsautocomplete via dotnet tool")

const proc = Bun.spawn({

cmd: ["dotnet", "tool", "install", "fsautocomplete", "--tool-path", Global.Path.bin],

stdout: "pipe",

stderr: "pipe",

stdin: "pipe",

})

const exit = await proc.exited

if (exit !== 0) {

log.error("Failed to install fsautocomplete")

return

}

bin = path.join(Global.Path.bin, "fsautocomplete" + (process.platform === "win32" ? ".exe" : ""))

log.info(`installed fsautocomplete`, { bin })

}

return {

process: spawn(bin, {

cwd: root,

}),

}

},

}

export const SourceKit: Info = {

id: "sourcekit-lsp",

extensions: [".swift", ".objc", "objcpp"],

root: NearestRoot(["Package.swift", "*.xcodeproj", "*.xcworkspace"]),

async spawn(root) {

// Check if sourcekit-lsp is available in the PATH

// This is installed with the Swift toolchain

const sourcekit = Bun.which("sourcekit-lsp")

if (sourcekit) {

return {

process: spawn(sourcekit, {

cwd: root,

}),

}

}

// If sourcekit-lsp not found, check if xcrun is available

// This is specific to macOS where sourcekit-lsp is typically installed with Xcode

if (!Bun.which("xcrun")) return

const lspLoc = await $`xcrun --find sourcekit-lsp`.quiet().nothrow()

if (lspLoc.exitCode !== 0) return

const bin = lspLoc.text().trim()

return {

process: spawn(bin, {

cwd: root,

}),

}

},

}

export const RustAnalyzer: Info = {

id: "rust",

root: async (root) => {

const crateRoot = await NearestRoot(["Cargo.toml", "Cargo.lock"])(root)

if (crateRoot === undefined) {

return undefined

}

let currentDir = crateRoot

while (currentDir !== path.dirname(currentDir)) {

// Stop at filesystem root

const cargoTomlPath = path.join(currentDir, "Cargo.toml")

try {

const cargoTomlContent = await Bun.file(cargoTomlPath).text()

if (cargoTomlContent.includes("[workspace]")) {

return currentDir

}

} catch (err) {

// File doesn't exist or can't be read, continue searching up

}

const parentDir = path.dirname(currentDir)

if (parentDir === currentDir) break // Reached filesystem root

currentDir = parentDir

// Stop if we've gone above the app root

if (!currentDir.startsWith(Instance.worktree)) break

}

return crateRoot

},

extensions: [".rs"],

async spawn(root) {

const bin = Bun.which("rust-analyzer")

if (!bin) {

log.info("rust-analyzer not found in path, please install it")

return

}

return {

process: spawn(bin, {

cwd: root,

}),

}

},

}

export const Clangd: Info = {

id: "clangd",

root: NearestRoot(["compile_commands.json", "compile_flags.txt", ".clangd", "CMakeLists.txt", "Makefile"]),

extensions: [".c", ".cpp", ".cc", ".cxx", ".c++", ".h", ".hpp", ".hh", ".hxx", ".h++"],

async spawn(root) {

const args = ["--background-index", "--clang-tidy"]

const fromPath = Bun.which("clangd")

if (fromPath) {

return {

process: spawn(fromPath, args, {

cwd: root,

}),

}

}

const ext = process.platform === "win32" ? ".exe" : ""

const direct = path.join(Global.Path.bin, "clangd" + ext)

if (await Bun.file(direct).exists()) {

return {

process: spawn(direct, args, {

cwd: root,

}),

}

}

const entries = await fs.readdir(Global.Path.bin, { withFileTypes: true }).catch(() => [])

for (const entry of entries) {

if (!entry.isDirectory()) continue

if (!entry.name.startsWith("clangd_")) continue

const candidate = path.join(Global.Path.bin, entry.name, "bin", "clangd" + ext)

if (await Bun.file(candidate).exists()) {

return {

process: spawn(candidate, args, {

cwd: root,

}),

}

}

}

if (Flag.OPENCODE_DISABLE_LSP_DOWNLOAD) return

log.info("downloading clangd from GitHub releases")

const releaseResponse = await fetch("https://api.github.com/repos/clangd/clangd/releases/latest")

if (!releaseResponse.ok) {

log.error("Failed to fetch clangd release info")

return

}

const release: {

tag_name?: string

assets?: { name?: string; browser_download_url?: string }[]

} = await releaseResponse.json()

const tag = release.tag_name

if (!tag) {

log.error("clangd release did not include a tag name")

return

}

const platform = process.platform

const tokens: Record<string, string> = {

darwin: "mac",

linux: "linux",

win32: "windows",

}

const token = tokens[platform]

if (!token) {

log.error(`Platform ${platform} is not supported by clangd auto-download`)

return

}

const assets = release.assets ?? []

const valid = (item: { name?: string; browser_download_url?: string }) => {

if (!item.name) return false

if (!item.browser_download_url) return false

if (!item.name.includes(token)) return false

return item.name.includes(tag)

}

const asset =

assets.find((item) => valid(item) && item.name?.endsWith(".zip")) ??

assets.find((item) => valid(item) && item.name?.endsWith(".tar.xz")) ??

assets.find((item) => valid(item))

if (!asset?.name || !asset.browser_download_url) {

log.error("clangd could not match release asset", { tag, platform })

return

}

const name = asset.name

const downloadResponse = await fetch(asset.browser_download_url)

if (!downloadResponse.ok) {

log.error("Failed to download clangd")

return

}

const archive = path.join(Global.Path.bin, name)

const buf = await downloadResponse.arrayBuffer()

if (buf.byteLength === 0) {

log.error("Failed to write clangd archive")

return

}

await Bun.write(archive, buf)

const zip = name.endsWith(".zip")

const tar = name.endsWith(".tar.xz")

if (!zip && !tar) {

log.error("clangd encountered unsupported asset", { asset: name })

return

}