first commit

build/node_modules/spawn-sync/lib/spawn-sync.js

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+'use strict';
+
+var path = require('path');
+var fs = require('fs');
+var tmpdir = require('os').tmpdir || require('os-shim').tmpdir;
+var cp = require('child_process');
+var sleep;
+var JSON = require('./json-buffer');
+try {
+  sleep = require('try-thread-sleep');
+} catch (ex) {
+  console.warn('Native thread-sleep not available.');
+  console.warn('This will result in much slower performance, but it will still work.');
+  console.warn('You should re-install spawn-sync or upgrade to the lastest version of node if possible.');
+  console.warn('Check ' + path.resolve(__dirname, '../error.log') + ' for more details');
+  sleep = function () {};
+}
+
+var temp = path.normalize(path.join(tmpdir(), 'spawn-sync'));
+
+function randomFileName(name) {
+  function randomHash(count) {
+    if (count === 1)
+      return parseInt(16*Math.random(), 10).toString(16);
+    else {
+      var hash = '';
+      for (var i=0; i<count; i++)
+        hash += randomHash(1);
+      return hash;
+    }
+  }
+
+  return temp + '_' + name + '_' + String(process.pid) + randomHash(20);
+}
+function unlink(filename) {
+  try {
+    fs.unlinkSync(filename);
+  } catch (ex) {
+    if (ex.code !== 'ENOENT') throw ex;
+  }
+}
+function tryUnlink(filename) {
+  // doesn't matter too much if we fail to delete temp files
+  try {
+    fs.unlinkSync(filename);
+  } catch(e) {}
+}
+
+function invoke(cmd) {
+  // location to keep flag for busy waiting fallback
+  var finished = randomFileName("finished");
+  unlink(finished);
+  if (process.platform === 'win32') {
+    cmd = cmd + '& echo "finished" > ' + finished;
+  } else {
+    cmd = cmd + '; echo "finished" > ' + finished;
+  }
+  cp.exec(cmd);
+
+  while (!fs.existsSync(finished)) {
+    // busy wait
+    sleep(200);
+  }
+
+  tryUnlink(finished);
+
+  return 0;
+}
+
+module.exports = spawnSyncFallback;
+function spawnSyncFallback(cmd, commandArgs, options) {
+  var args = [];
+  for (var i = 0; i < arguments.length; i++) {
+    args.push(arguments[i]);
+  }
+
+  // node.js script to run the command
+  var worker = path.normalize(__dirname + '/worker.js');
+  // location to store arguments
+  var input = randomFileName('input');
+  var output = randomFileName('output');
+  unlink(output);
+
+  fs.writeFileSync(input, JSON.stringify(args));
+  invoke('"' + process.execPath + '" "' + worker + '" "' + input + '" "' + output + '"');
+  var res = JSON.parse(fs.readFileSync(output, 'utf8'));
+  tryUnlink(input);tryUnlink(output);
+  return res;
+}