From 2ba214939d2447622a396164ab120b6dfa46abae Mon Sep 17 00:00:00 2001
From: jdecroock <decroockjovi@gmail.com>
Date: Sun, 17 Sep 2023 10:32:50 +0200
Subject: [PATCH] prevent dupes

---
 .changeset/popular-bikes-clap.md      | 5 +++++
 packages/graphqlsp/src/diagnostics.ts | 7 ++++++-
 2 files changed, 11 insertions(+), 1 deletion(-)
 create mode 100644 .changeset/popular-bikes-clap.md

diff --git a/.changeset/popular-bikes-clap.md b/.changeset/popular-bikes-clap.md
new file mode 100644
index 00000000..1fbf4106
--- /dev/null
+++ b/.changeset/popular-bikes-clap.md
@@ -0,0 +1,5 @@
+---
+'@0no-co/graphqlsp': patch
+---
+
+Prevent duplicate async file-generation processes from happening
diff --git a/packages/graphqlsp/src/diagnostics.ts b/packages/graphqlsp/src/diagnostics.ts
index 1be2507c..658632ef 100644
--- a/packages/graphqlsp/src/diagnostics.ts
+++ b/packages/graphqlsp/src/diagnostics.ts
@@ -33,6 +33,8 @@ export const MISSING_OPERATION_NAME_CODE = 52002;
 export const MISSING_FRAGMENT_CODE = 52003;
 export const USING_DEPRECATED_FIELD_CODE = 52004;
 
+let isGeneratingTypes = false;
+
 export function getGraphQLDiagnostics(
   // This is so that we don't change offsets when there are
   // TypeScript errors
@@ -308,9 +310,10 @@ export function getGraphQLDiagnostics(
     !disableTypegen
   ) {
     try {
-      if (isFileDirty(filename, source)) {
+      if (isFileDirty(filename, source) && !isGeneratingTypes) {
         return tsDiagnostics;
       }
+      isGeneratingTypes = true;
 
       const parts = source.fileName.split('/');
       const name = parts[parts.length - 1];
@@ -421,10 +424,12 @@ export function getGraphQLDiagnostics(
         info.languageServiceHost.writeFile!(source.fileName, finalSourceText);
         scriptInfo!.reloadFromFile();
         scriptInfo!.registerFileUpdate();
+        isGeneratingTypes = false;
       });
     } catch (e) {
       const scriptInfo = info.project.projectService.getScriptInfo(filename);
       scriptInfo!.reloadFromFile();
+      isGeneratingTypes = false;
     }
   }