fix: osx hide-bazel-files issue with fsevents

      // Not sure how but the following was observed on OSX:
      // `Error: ENOENT: no such file or directory, lstat
      // '/private/var/folders/0l/nj_q9kzj49gdz1w6f5v9tw3h0000gn/T/tmp-49206kt9HWV3A8daE/node_modules/fsevents'`
      // It seems that there are filesystem race conditions on OSX; this may be related
      // to the general flakes we are seeing on OSX which show up on buildkite quite a bit.
      // In the above case my `fsevents` install failed because of `gyp: No Xcode or CLT version
      // detected!` so my guess is that as this is a optional dependency, there was a transient
      // `node_modules/fsevents` folder which was removed but somehow still picked up by
      // `fs.readdirSync` above. But since that folder was removed fs.lstatSync throws.
      // TODO(gregmagolan): get to the bottom of the filesystem issues on OSX

packages/hide-bazel-files/index.js

@@ -10,7 +10,22 @@ function findBazelFiles(dir) {
   }
   return fs.readdirSync(dir).reduce((files, file) => {
     const fullPath = path.posix.join(dir, file);
-    const isSymbolicLink = fs.lstatSync(fullPath).isSymbolicLink();
+    let isSymbolicLink;
+    try {
+      isSymbolicLink = fs.lstatSync(fullPath).isSymbolicLink();
+    } catch (e) {
+      // Not sure how but the following was observed on OSX:
+      // `Error: ENOENT: no such file or directory, lstat
+      // '/private/var/folders/0l/nj_q9kzj49gdz1w6f5v9tw3h0000gn/T/tmp-49206kt9HWV3A8daE/node_modules/fsevents'`
+      // It seems that there are filesystem race conditions on OSX; this may be related
+      // to the general flakes we are seeing on OSX which show up on buildkite quite a bit.
+      // In the above case my `fsevents` install failed because of `gyp: No Xcode or CLT version
+      // detected!` so my guess is that as this is a optional dependency, there was a transient
+      // `node_modules/fsevents` folder which was removed but somehow still picked up by
+      // `fs.readdirSync` above. But since that folder was removed fs.lstatSync throws.
+      // TODO(gregmagolan): get to the bottom of the filesystem issues on OSX
+      return files;
+    }
     let stat;
     try {
       stat = fs.statSync(fullPath);