go/src/system.ts

import * as os from 'os';

export function getPlatform(): string {
    // darwin and linux match already
    // freebsd not supported yet but future proofed.
  
    // 'aix', 'darwin', 'freebsd', 'linux', 'openbsd', 'sunos', and 'win32'
    let plat: string = os.platform();
  
    // wants 'darwin', 'freebsd', 'linux', 'windows'
    if (plat === 'win32') {
      plat = 'windows';
    }
  
    return plat;
  }
  
  export function getArch(): string {
    // 'arm', 'arm64', 'ia32', 'mips', 'mipsel', 'ppc', 'ppc64', 's390', 's390x', 'x32', and 'x64'.
    let arch: string = os.arch();
  
    // wants amd64, 386, arm64, armv61, ppc641e, s390x
    // currently not supported by runner but future proofed mapping
    switch (arch) {
      case 'x64':
        arch = 'amd64';
        break;
      case 'ppc':
        arch = 'ppc64';
        break;
      case 'x32':
        arch = '386';
        break;
    }
  
    return arch;
  }