build.ts

import type { BuildConfig } from "bun";
import dts from "bun-plugin-dts";
import { rmSync } from "node:fs";

const isProduction = process.env.NODE_ENV === "production";

const outdir = "./dist";

const defaultBuildConfig: BuildConfig = {
  entrypoints: ["./src/index.ts"],
  outdir,
  minify: isProduction,
  sourcemap: isProduction ? undefined : "inline",
};

type Format = "esm" | "cjs" | "iife";

interface FormatConfig {
  format: Format;
  naming: string;
  plugins?: BuildConfig["plugins"];
}

const buildFormats: FormatConfig[] = [
  {
    format: "esm",
    naming: "[dir]/[name].js",
    plugins: [dts()],
  },
  {
    format: "cjs",
    naming: "[dir]/[name].cjs",
  },
];

async function buildAll() {
  console.log(
    `Starting build in ${isProduction ? "production" : "development"} mode...`
  );

  // Remove the dist directory recursively and forcefully before building
  try {
    rmSync(outdir, { recursive: true, force: true });
    console.log(`Removed existing '${outdir}' directory.`);
  } catch (err) {
    console.warn(`Warning: Could not remove '${outdir}' directory.`, err);
  }

  try {
    await Promise.all(
      buildFormats.map(({ format, naming, plugins }) => {
        console.log(`Building format: ${format}...`);
        return Bun.build({
          ...defaultBuildConfig,
          format,
          naming,
          plugins,
        });
      })
    );
    console.log("Build completed successfully.");
  } catch (error) {
    console.error("Build failed:", error);
    process.exit(1);
  }
}

await buildAll();