Do not send first missing file event as well.

sheetalkamat · sheetalkamat · commit 4046bb15acc1 · 2018-03-13T15:09:13.000-07:00
diff --git a/src/compiler/sys.ts b/src/compiler/sys.ts
@@ -752,16 +752,17 @@ namespace ts {
                 };
 
                 function fileChanged(curr: any, prev: any) {
+                    // previous event kind check is to ensure we recongnize the file as previously also missing when it is restored or renamed twice (that is it disappears and reappears)
+                    // In such case, prevTime returned is same as prev time of event when file was deleted as per node documentation
+                    const isPreviouslyDeleted = +prev.mtime === 0 || eventKind === FileWatcherEventKind.Deleted;
                     if (+curr.mtime === 0) {
-                        if (eventKind === FileWatcherEventKind.Deleted) {
+                        if (isPreviouslyDeleted) {
                             // Already deleted file, no need to callback again
                             return;
                         }
                         eventKind = FileWatcherEventKind.Deleted;
                     }
-                    // previous event kind check is to ensure we send created event when file is restored or renamed twice (that is it disappears and reappears)
-                    // since in that case the prevTime returned is same as prev time of event when file was deleted as per node documentation
-                    else if (+prev.mtime === 0 || eventKind === FileWatcherEventKind.Deleted) {
+                    else if (isPreviouslyDeleted) {
                         eventKind = FileWatcherEventKind.Created;
                     }
                     // If there is no change in modified time, ignore the event
