BrowserOS/scripts/build_server.ts

#!/usr/bin/env bun
/**
 * Build script for BrowserOS server binaries
 *
 * Usage:
 *   bun scripts/build_server.ts --mode=prod [--target=darwin-arm64]
 *   bun scripts/build_server.ts --mode=dev [--target=all]
 *
 * Modes:
 *   prod - Clean environment build using only .env.prod
 *   dev  - Normal build using shell environment + .env.dev
 *
 * Targets:
 *   linux-x64, linux-arm64, windows-x64, darwin-arm64, darwin-x64, all
 */

import { spawn } from "child_process";
import { readFileSync, mkdirSync } from "fs";
import { resolve, join } from "path";
import { parse } from "dotenv";

interface BuildTarget {
  name: string;
  bunTarget: string;
  outfile: string;
}

const TARGETS: Record<string, BuildTarget> = {
  "linux-x64": {
    name: "Linux x64",
    bunTarget: "bun-linux-x64-modern",
    outfile: "dist/server/browseros-server-linux-x64",
  },
  "linux-arm64": {
    name: "Linux ARM64",
    bunTarget: "bun-linux-arm64",
    outfile: "dist/server/browseros-server-linux-arm64",
  },
  "windows-x64": {
    name: "Windows x64",
    bunTarget: "bun-windows-x64-modern",
    outfile: "dist/server/browseros-server-windows-x64.exe",
  },
  "darwin-arm64": {
    name: "macOS ARM64",
    bunTarget: "bun-darwin-arm64",
    outfile: "dist/server/browseros-server-darwin-arm64",
  },
  "darwin-x64": {
    name: "macOS x64",
    bunTarget: "bun-darwin-x64",
    outfile: "dist/server/browseros-server-darwin-x64",
  },
};

const MINIMAL_SYSTEM_VARS = ["PATH"];

function parseArgs(): { mode: "prod" | "dev"; targets: string[] } {
  const args = process.argv.slice(2);
  let mode: "prod" | "dev" = "prod";
  let targetArg = "all";

  for (const arg of args) {
    if (arg.startsWith("--mode=")) {
      const modeValue = arg.split("=")[1];
      if (modeValue !== "prod" && modeValue !== "dev") {
        console.error(`Invalid mode: ${modeValue}. Must be 'prod' or 'dev'`);
        process.exit(1);
      }
      mode = modeValue;
    } else if (arg.startsWith("--target=")) {
      targetArg = arg.split("=")[1];
    }
  }

  const targets =
    targetArg === "all"
      ? Object.keys(TARGETS)
      : targetArg.split(",").map((t) => t.trim());

  for (const target of targets) {
    if (!TARGETS[target]) {
      console.error(`Invalid target: ${target}`);
      console.error(`Available targets: ${Object.keys(TARGETS).join(", ")}, all`);
      process.exit(1);
    }
  }

  return { mode, targets };
}

function loadEnvFile(path: string): Record<string, string> {
  try {
    const content = readFileSync(path, "utf-8");
    const parsed = parse(content);
    return parsed;
  } catch (error) {
    console.error(`Failed to load ${path}:`, error);
    process.exit(1);
  }
}

function createCleanEnv(envVars: Record<string, string>): Record<string, string> {
  const cleanEnv: Record<string, string> = {};

  for (const varName of MINIMAL_SYSTEM_VARS) {
    const value = process.env[varName];
    if (value) {
      cleanEnv[varName] = value;
    }
  }

  Object.assign(cleanEnv, envVars);

  return cleanEnv;
}

function runCommand(
  command: string,
  args: string[],
  env: NodeJS.ProcessEnv
): Promise<void> {
  return new Promise((resolve, reject) => {
    const child = spawn(command, args, {
      env,
      stdio: "inherit",
    });

    child.on("close", (code) => {
      if (code === 0) {
        resolve();
      } else {
        reject(new Error(`Command exited with code ${code}`));
      }
    });

    child.on("error", (error) => {
      reject(error);
    });
  });
}

async function buildTarget(
  target: BuildTarget,
  mode: "prod" | "dev",
  envVars: Record<string, string>
): Promise<void> {
  console.log(`\n📦 Building ${target.name}...`);

  const args = [
    "build",
    "--compile",
    "packages/server/src/index.ts",
    "--outfile",
    target.outfile,
    "--minify",
    "--sourcemap",
    `--target=${target.bunTarget}`,
    "--env",
    "inline",
    "--external=*?binary",
  ];

  const buildEnv = mode === "prod" ? createCleanEnv(envVars) : { ...process.env, ...envVars };

  try {
    await runCommand("bun", args, buildEnv);
    console.log(`✅ ${target.name} built successfully`);

    if (target.outfile.endsWith(".exe")) {
      console.log(`🔧 Patching Windows executable...`);
      await runCommand("bun", ["scripts/patch-windows-exe.ts", target.outfile], process.env);
    }
  } catch (error) {
    console.error(`❌ Failed to build ${target.name}:`, error);
    throw error;
  }
}

async function main() {
  const { mode, targets } = parseArgs();
  const rootDir = resolve(import.meta.dir, "..");
  process.chdir(rootDir);

  console.log(`🚀 Building BrowserOS server binaries`);
  console.log(`   Mode: ${mode}`);
  console.log(`   Targets: ${targets.join(", ")}`);

  const envFile = mode === "prod" ? ".env.prod" : ".env.dev";
  const envPath = join(rootDir, envFile);

  console.log(`\n📄 Loading environment from ${envFile}...`);
  const envVars = loadEnvFile(envPath);
  console.log(`   Loaded ${Object.keys(envVars).length} variables`);

  if (mode === "prod") {
    console.log(`\n🔒 Production mode: Using CLEAN environment (only ${envFile} + minimal system vars)`);
    console.log(`   System vars: ${MINIMAL_SYSTEM_VARS.join(", ")}`);
  } else {
    console.log(`\n🔓 Development mode: Using shell environment + ${envFile}`);
  }

  mkdirSync("dist/server", { recursive: true });

  for (const targetKey of targets) {
    const target = TARGETS[targetKey];
    await buildTarget(target, mode, envVars);
  }

  console.log(`\n✨ All builds completed successfully!`);
  console.log(`\n📦 Output files:`);
  for (const targetKey of targets) {
    console.log(`   ${TARGETS[targetKey].outfile}`);
  }
}

main().catch((error) => {
  console.error("\n💥 Build failed:", error);
  process.exit(1);
});