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node_modules/opener/lib/opener.js 2.29 KB
aaac7fed   liuqimichale   add
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  "use strict";
  var childProcess = require("child_process");
  var os = require("os");
  
  module.exports = function opener(args, options, callback) {
      var platform = process.platform;
  
      // Attempt to detect Windows Subystem for Linux (WSL). WSL  itself as Linux (which works in most cases), but in
      // this specific case we need to treat it as actually being Windows. The "Windows-way" of opening things through
      // cmd.exe works just fine here, whereas using xdg-open does not, since there is no X Windows in WSL.
      if (platform === "linux" && os.release().indexOf("Microsoft") !== -1) {
          platform = "win32";
      }
  
      // http://stackoverflow.com/q/1480971/3191, but see below for Windows.
      var command;
      switch (platform) {
          case "win32": {
              command = "cmd.exe";
              break;
          }
          case "darwin": {
              command = "open";
              break;
          }
          default: {
              command = "xdg-open";
              break;
          }
      }
  
      if (typeof args === "string") {
          args = [args];
      }
  
      if (typeof options === "function") {
          callback = options;
          options = {};
      }
  
      if (options && typeof options === "object" && options.command) {
          if (platform === "win32") {
              // *always* use cmd on windows
              args = [options.command].concat(args);
          } else {
              command = options.command;
          }
      }
  
      if (platform === "win32") {
          // On Windows, we really want to use the "start" command. But, the rules regarding arguments with spaces, and
          // escaping them with quotes, can get really arcane. So the easiest way to deal with this is to pass off the
          // responsibility to "cmd /c", which has that logic built in.
          //
          // Furthermore, if "cmd /c" double-quoted the first parameter, then "start" will interpret it as a window title,
          // so we need to add a dummy empty-string window title: http://stackoverflow.com/a/154090/3191
          //
          // Additionally, on Windows ampersand needs to be escaped when passed to "start"
          args = args.map(function (value) {
              return value.replace(/&/g, "^&");
          });
          args = ["/c", "start", "\"\""].concat(args);
      }
  
      return childProcess.execFile(command, args, options, callback);
  };