fix: e2e sidecar copy

e2e/run.mjs

@@ -7,6 +7,7 @@ import {
   createWriteStream,
   existsSync,
   readFileSync,
+  rmSync,
   statSync,
 } from "node:fs";
 import {
@@ -316,10 +317,16 @@ function syncHarnessLockfile() {
 
 // Tauri starts a sidecar from next to the running executable only. Copy the
 // sidecars this build made there, so a copy left by an older harness never
-// fails every launch on its version check.
+// fails every launch on its version check. The old file is removed first:
+// macOS kills an executable that was overwritten in place.
 function installSidecars() {
   const target = hostRustTarget();
   for (const name of ["donut-proxy", "xray"]) {
+    const destination = path.join(
+      path.dirname(appBinary),
+      `${name}${executableSuffix}`,
+    );
+    rmSync(destination, { force: true });
     copyFileSync(
       path.join(
         projectRoot,
@@ -327,7 +334,7 @@ function installSidecars() {
         "binaries",
         `${name}-${target}${executableSuffix}`,
       ),
-      path.join(path.dirname(appBinary), `${name}${executableSuffix}`),
+      destination,
     );
   }
 }

src-tauri/copy-proxy-binary.mjs

@@ -1,5 +1,5 @@
 import { execFileSync, execSync } from "node:child_process";
-import { copyFileSync, existsSync, mkdirSync } from "node:fs";
+import { copyFileSync, existsSync, mkdirSync, rmSync } from "node:fs";
 import { dirname, join } from "node:path";
 import { fileURLToPath } from "node:url";
 import { downloadXray } from "./download-xray.mjs";
@@ -75,6 +75,8 @@ function copyBinary(baseName) {
     console.error(`Error: Failed to build ${baseName} binary`);
     process.exit(1);
   }
+  // macOS kills an executable that was overwritten in place.
+  rmSync(dest, { force: true });
   copyFileSync(source, dest);
   console.log(`Built and copied ${binName} to ${dest}`);
 }