From 272fea13e71b677c4fa40a0315c89cf97cbd84d7 Mon Sep 17 00:00:00 2001
From: Damian Gryski <damian@gryski.com>
Date: Thu, 30 May 2024 21:01:50 -0700
Subject: [PATCH] builder: keep un-wasm-opt'd .wasm if -work was passed

---
 builder/build.go | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/builder/build.go b/builder/build.go
index 940439667..e415781fe 100644
--- a/builder/build.go
+++ b/builder/build.go
@@ -825,10 +825,18 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 					args = append(args, "--asyncify")
 				}
 
+				exeunopt := result.Executable
+
+				if config.Options.Work {
+					// Keep the work direction around => don't overwrite the .wasm binary with the optimized version
+					exeunopt += ".pre-wasm-opt"
+					os.Rename(result.Executable, exeunopt)
+				}
+
 				args = append(args,
 					opt,
 					"-g",
-					result.Executable,
+					exeunopt,
 					"--output", result.Executable,
 				)