Add production dependencies

node_modules/gulp-cli/lib/versioned/^4.0.0/log/sync-task.js

@@ -0,0 +1,52 @@
+'use strict';
+
+var log = require('gulplog');
+var ansi = require('../../../shared/ansi');
+
+var tasks = {};
+
+function warn() {
+  var taskKeys = Object.keys(tasks);
+
+  if (!taskKeys.length) {
+    return;
+  }
+
+  var taskNames = taskKeys.map(function(key) {
+    return tasks[key];
+  }).join(', ');
+
+  process.exitCode = 1;
+
+  log.warn(
+    ansi.red('The following tasks did not complete:'),
+    ansi.cyan(taskNames)
+  );
+  log.warn(
+    ansi.red('Did you forget to signal async completion?')
+  );
+}
+
+function start(e) {
+  tasks[e.uid] = e.name;
+}
+
+function clear(e) {
+  delete tasks[e.uid];
+}
+
+function clearAll() {
+  tasks = {};
+}
+
+function logSyncTask(gulpInst, opts) {
+
+  process.once('exit', warn);
+  gulpInst.on('start', start);
+  gulpInst.on('stop', clear);
+  // When not running in --continue mode, we need to clear everything on error to avoid
+  // false positives.
+  gulpInst.on('error', opts.continue ? clear : clearAll);
+}
+
+module.exports = logSyncTask;