Add telemetry for TRAP caching

node_modules/get-folder-size/index.js

@@ -0,0 +1,66 @@
+'use strict';
+
+const fs = require('fs');
+const path = require('path');
+const eachAsync = require('tiny-each-async');
+
+function readSizeRecursive(seen, item, ignoreRegEx, callback) {
+  let cb;
+  let ignoreRegExp;
+
+  if (!callback) {
+    cb = ignoreRegEx;
+    ignoreRegExp = null;
+  } else {
+    cb = callback;
+    ignoreRegExp = ignoreRegEx;
+  }
+
+  fs.lstat(item, function lstat(e, stats) {
+    let total = !e ? (stats.size || 0) : 0;
+
+    if (stats) {
+      if (seen.has(stats.ino)) { return cb(null, 0); }
+
+      seen.add(stats.ino);
+    }
+
+    if (!e && stats.isDirectory()) {
+      fs.readdir(item, (err, list) => {
+        if (err) { return cb(err); }
+
+        eachAsync(
+          list,
+          5000,
+          (dirItem, next) => {
+            readSizeRecursive(
+              seen,
+              path.join(item, dirItem),
+              ignoreRegExp,
+              (error, size) => {
+                if (!error) { total += size; }
+
+                next(error);
+              }
+            );
+          },
+          (finalErr) => {
+            cb(finalErr, total);
+          }
+        );
+      });
+    } else {
+      if (ignoreRegExp && ignoreRegExp.test(item)) {
+        total = 0;
+      }
+
+      cb(e, total);
+    }
+  });
+}
+
+module.exports = (...args) => {
+  args.unshift(new Set());
+
+  return readSizeRecursive(...args);
+};