From b1ed38c2d0a2fed1d246131913d4b35f942f8ada Mon Sep 17 00:00:00 2001
From: Brian Gough <briangough@users.noreply.github.com>
Date: Mon, 22 Jun 2026 12:00:29 +0100
Subject: [PATCH] Merge pull request #34761 from
 overleaf/bg-enable-clsi-checkpoints

adds enableCheckpoint to compile requests from web to clsi

GitOrigin-RevId: 431b28602091cf8f7252ad836f083c7b092351d4
---
 .../web/app/src/Features/Compile/ClsiManager.mjs |  1 +
 .../src/Features/Compile/CompileController.mjs   | 16 ++++++++++++++--
 .../unit/src/Compile/CompileController.test.mjs  | 10 ++++------
 3 files changed, 19 insertions(+), 8 deletions(-)

diff --git a/services/web/app/src/Features/Compile/ClsiManager.mjs b/services/web/app/src/Features/Compile/ClsiManager.mjs
index aa0fb3cb50..00b0883495 100644
--- a/services/web/app/src/Features/Compile/ClsiManager.mjs
+++ b/services/web/app/src/Features/Compile/ClsiManager.mjs
@@ -1161,6 +1161,7 @@ function _finaliseRequest(projectId, options, project, docs, files) {
         enablePdfCaching:
           (Settings.enablePdfCaching && options.enablePdfCaching) || false,
         pdfCachingMinChunkSize: options.pdfCachingMinChunkSize,
+        enableCheckpoint: Boolean(options.enableCheckpoint),
         flags,
         metricsMethod: options.compileGroup,
         metricsPath: options.metricsPath,
diff --git a/services/web/app/src/Features/Compile/CompileController.mjs b/services/web/app/src/Features/Compile/CompileController.mjs
index 106a4fb2f7..76f5933229 100644
--- a/services/web/app/src/Features/Compile/CompileController.mjs
+++ b/services/web/app/src/Features/Compile/CompileController.mjs
@@ -46,13 +46,12 @@ function getOutputFilesArchiveSpecification(projectId, userId, buildId) {
 }
 
 async function _getSplitTestOptions(req, res) {
-  const { variant } = await SplitTestHandler.promises.getAssignment(
+  const compileFromHistory = await SplitTestHandler.promises.featureFlagEnabled(
     req,
     res,
     'compile-from-history',
     { includeReferer: true }
   )
-  const compileFromHistory = variant === 'enabled'
 
   const pdfDownloadDomain = Settings.pdfDownloadDomain
   const enablePdfCaching = Settings.enablePdfCaching
@@ -67,11 +66,20 @@ async function _getSplitTestOptions(req, res) {
   }
 
   const pdfCachingMinChunkSize = Settings.pdfCachingMinChunkSize
+
+  const enableCheckpoint = await SplitTestHandler.promises.featureFlagEnabled(
+    req,
+    res,
+    'compile-with-checkpoint',
+    { includeReferer: true }
+  )
+
   return {
     compileFromHistory,
     pdfDownloadDomain,
     enablePdfCaching,
     pdfCachingMinChunkSize,
+    enableCheckpoint,
   }
 }
 
@@ -206,11 +214,15 @@ const _CompileController = {
       pdfCachingMinChunkSize,
       pdfDownloadDomain,
       compileFromHistory,
+      enableCheckpoint,
     } = await _getSplitTestOptions(req, res)
     if (Features.hasFeature('saas')) {
       options.compileFromClsiCache = true
       options.populateClsiCache = true
       options.compileFromHistory = compileFromHistory
+      if (enableCheckpoint) {
+        options.enableCheckpoint = enableCheckpoint
+      }
     }
     options.enablePdfCaching = enablePdfCaching
     if (enablePdfCaching) {
diff --git a/services/web/test/unit/src/Compile/CompileController.test.mjs b/services/web/test/unit/src/Compile/CompileController.test.mjs
index 57bda788b5..5fb691646e 100644
--- a/services/web/test/unit/src/Compile/CompileController.test.mjs
+++ b/services/web/test/unit/src/Compile/CompileController.test.mjs
@@ -153,13 +153,11 @@ describe('CompileController', function () {
       '../../../../app/src/Features/SplitTests/SplitTestHandler',
       () => ({
         default: {
-          getAssignment: (ctx.getAssignment = sinon.stub().yields(null, {
-            variant: 'default',
-          })),
+          featureFlagEnabled: (ctx.featureFlagEnabled = sinon
+            .stub()
+            .yields(null, false)),
           promises: {
-            getAssignment: sinon.stub().resolves({
-              variant: 'default',
-            }),
+            featureFlagEnabled: sinon.stub().resolves(false),
           },
         },
       })