denoland-deno/runtime/js/01_build.js

// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
"use strict";

((window) => {
  const { ObjectFreeze, StringPrototypeSplit } = window.__bootstrap.primordials;

  const build = {
    target: "unknown",
    arch: "unknown",
    os: "unknown",
    vendor: "unknown",
    env: undefined,
  };

  function setBuildInfo(target) {
    const { 0: arch, 1: vendor, 2: os, 3: env } = StringPrototypeSplit(
      target,
      "-",
      4,
    );
    build.target = target;
    build.arch = arch;
    build.vendor = vendor;
    build.os = os;
    build.env = env;
    ObjectFreeze(build);
  }

  window.__bootstrap.build = {
    build,
    setBuildInfo,
  };
})(this);