#!/usr/bin/env node

import childProcess from "node:child_process"

import fs from "node:fs"

import os from "node:os"

import path from "node:path"

import { createRequire } from "node:module"

import { fileURLToPath } from "node:url"

const directory = path.dirname(fileURLToPath(import.meta.url))

const require = createRequire(import.meta.url)

const packageJson = JSON.parse(fs.readFileSync(path.join(directory, "package.json"), "utf8"))

const command = Object.keys(packageJson.bin ?? {})[0]

if (!command) throw new Error("OpenCode package does not declare a binary")

const platform = { darwin: "darwin", linux: "linux", win32: "windows" }[os.platform()] ?? os.platform()

const arch = { x64: "x64", arm64: "arm64", arm: "arm" }[os.arch()] ?? os.arch()

const sourceBinary = platform === "windows" ? `${command}.exe` : command

const targetBinary = path.resolve(directory, packageJson.bin[command])

const dependencies = packageJson.optionalDependencies ?? {}

const base = Object.keys(dependencies).find((name) => name.endsWith(`-${platform}-${arch}`))

if (!base) throw new Error(`OpenCode does not provide a binary for ${platform}-${arch}`)

function supportsAvx2() {

if (arch !== "x64") return false

if (platform === "linux") {

try {

return /(^|\s)avx2(\s|$)/i.test(fs.readFileSync("/proc/cpuinfo", "utf8"))

} catch {

return false

}

}

if (platform === "darwin") {

try {

const result = childProcess.spawnSync("sysctl", ["-n", "hw.optional.avx2_0"], {

encoding: "utf8",

timeout: 1500,

})

return result.status === 0 && (result.stdout || "").trim() === "1"

} catch {

return false

}

}

if (platform === "windows") {

const script =

'(Add-Type -MemberDefinition "[DllImport(""kernel32.dll"")] public static extern bool IsProcessorFeaturePresent(int ProcessorFeature);" -Name Kernel32 -Namespace Win32 -PassThru)::IsProcessorFeaturePresent(40)'

for (const executable of ["powershell.exe", "pwsh.exe", "pwsh", "powershell"]) {

try {

const result = childProcess.spawnSync(executable, ["-NoProfile", "-NonInteractive", "-Command", script], {

encoding: "utf8",

timeout: 3000,

windowsHide: true,

})

if (result.status !== 0) continue

const output = (result.stdout || "").trim().toLowerCase()

if (output === "true" || output === "1") return true

if (output === "false" || output === "0") return false

} catch {

continue

}

}

}

return false

}

function isMusl() {

if (platform !== "linux") return false

try {

if (fs.existsSync("/etc/alpine-release")) return true

const result = childProcess.spawnSync("ldd", ["--version"], { encoding: "utf8" })

return `${result.stdout || ""}${result.stderr || ""}`.toLowerCase().includes("musl")

} catch {

return false

}

}

function packageNames() {

const baseline = arch === "x64" && !supportsAvx2()

const names =

platform === "linux"

? isMusl()

? arch === "x64"

? baseline

? [`${base}-baseline-musl`, `${base}-musl`, `${base}-baseline`, base]

: [`${base}-musl`, `${base}-baseline-musl`, base, `${base}-baseline`]

: [`${base}-musl`, base]

: arch === "x64"

? baseline

? [`${base}-baseline`, base, `${base}-baseline-musl`, `${base}-musl`]

: [base, `${base}-baseline`, `${base}-musl`, `${base}-baseline-musl`]

: [base, `${base}-musl`]

: arch === "x64"

? baseline

? [`${base}-baseline`, base]

: [base, `${base}-baseline`]

: [base]

return names.filter((name) => dependencies[name])

}

function copyBinary(source) {

if (!fs.existsSync(source)) throw new Error(`Binary not found at ${source}`)

fs.mkdirSync(path.dirname(targetBinary), { recursive: true })

if (fs.existsSync(targetBinary)) fs.unlinkSync(targetBinary)

try {

fs.linkSync(source, targetBinary)

} catch {

fs.copyFileSync(source, targetBinary)

}

fs.chmodSync(targetBinary, 0o755)

}

function resolveBinary(name) {

const packagePath = require.resolve(`${name}/package.json`)

return path.join(path.dirname(packagePath), "bin", sourceBinary)

}

function installPackage(name) {

const temp = fs.mkdtempSync(path.join(os.tmpdir(), "opencode-install-"))

try {

const result = childProcess.spawnSync(

"npm",

["install", "--ignore-scripts", "--no-save", "--loglevel=error", "--prefix", temp, `${name}@${dependencies[name]}`],

{ stdio: "inherit", windowsHide: true },

)

if (result.status !== 0) return false

copyBinary(path.join(temp, "node_modules", name, "bin", sourceBinary))

return true

} finally {

fs.rmSync(temp, { recursive: true, force: true })

}

}

function verifyBinary() {

return (

childProcess.spawnSync(targetBinary, ["--version"], {

stdio: "ignore",

windowsHide: true,

}).status === 0

)

}

function main() {

const names = packageNames()

for (const name of names) {

try {

copyBinary(resolveBinary(name))

if (verifyBinary()) return

} catch {

if (installPackage(name) && verifyBinary()) return

}

}

throw new Error(`Failed to install OpenCode. Try manually installing ${names.map((name) => JSON.stringify(name)).join(" or ")}.`)

}

try {

main()

} catch (error) {

console.error(error instanceof Error ? error.message : String(error))

process.exit(1)

}