src: split `LoadEnvironment()` at `startExecution()`

This makes it easier to cater to embedders which wish to skip
the `startExecution()` part.

PR-URL: https://github.com/nodejs/node/pull/25320
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Minwoo Jung <minwoo@nodesource.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Franziska Hinkelmann <franziska.hinkelmann@gmail.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/lib/internal/bootstrap/node.js b/lib/internal/bootstrap/node.js
index 089143e5d0..e229d2a2c6 100644
--- a/lib/internal/bootstrap/node.js
+++ b/lib/internal/bootstrap/node.js
@@ -303,7 +303,7 @@ function startup() {
   } = perf.constants;
   perf.markMilestone(NODE_PERFORMANCE_MILESTONE_BOOTSTRAP_COMPLETE);
 
-  startExecution();
+  return startExecution;
 }
 
 // There are various modes that Node can run in. The most common two
@@ -729,4 +729,4 @@ function checkScriptSyntax(source, filename) {
   new vm.Script(source, { displayErrors: true, filename });
 }
 
-startup();
+return startup();