$ invpath <path>

invpath

#!/usr/bin/env node

getOptions(function(options) {
  if (!options.path) {
    console.log('Usage: invpath <path>');
    process.exit(0);
  }

  var path = options.path.trim();
  var type = guess(path);
  var result = null;

  switch (type) {
    case 'mac': result = toWindows(path); break;
    case 'windows': result = toMac(path); break;
  }

  if (result) {
    console.log(result);
    process.exit(0);
  } else {
    console.error('Unknown format: "' + path + '"');
    process.exit(1);
  }
});

function getOptions(callback) {
  var options = parseArguments();

  if (options.path) {
    callback(options);
  } else {
    process.stdin.setEncoding('utf8');
    process.stdin.once('readable', function() {
      options.path = process.stdin.read() || '';
      callback(options);
    });
  }
}

function parseArguments() {
  return process.argv.slice(2).reduce(function(options, arg) {
    if (arg.indexOf('-') !== 0) {
      options.path = arg;
    }

    return options;
  }, {});
}

function guess(string) {
  var type = 'unknown';

  if (require('url').parse(string).protocol === 'smb:') {
    type = 'mac';
  } else if (string.match(/^\\\\|^¥¥/)) {
    type =  'windows';
  }

  return type;
}

function toMac(string) {
  return 'smb:' + string.replace(/\\|¥/g, '/');
}

function toWindows(string) {
  return string.substr(4).replace(/\//g, '\\');
}