fix(bundler/nsis): use temp dir for webview2 installer, closes #7409 (#7486)

* fix(bundler/nsis): use temp dir for webview2 installer, closes #7409

* Update .changes/fix-nsis-webview2-installer-use-tempdir.md

---------

Co-authored-by: Amr Bashir <amr.bashir2015@gmail.com>

.changes/fix-nsis-webview2-installer-use-tempdir.md

@@ -0,0 +1,5 @@
+---
+'tauri-bundler': 'patch:enhance'
+---
+
+On Windows, NSIS installer will write webview2 installer file to the well-known temp dir instead of the install dir, so we don't pollute the install dir.

tooling/bundler/src/bundle/windows/templates/installer.nsi

@@ -456,18 +456,18 @@ Section WebView2
   !endif
 
   !if "${INSTALLWEBVIEW2MODE}" == "embedBootstrapper"
-    CreateDirectory "$INSTDIR\redist"
-    File "/oname=$INSTDIR\redist\MicrosoftEdgeWebview2Setup.exe" "${WEBVIEW2BOOTSTRAPPERPATH}"
+    Delete "$TEMP\MicrosoftEdgeWebview2Setup.exe"
+    File "/oname=$TEMP\MicrosoftEdgeWebview2Setup.exe" "${WEBVIEW2BOOTSTRAPPERPATH}"
     DetailPrint "$(installingWebview2)"
-    StrCpy $6 "$INSTDIR\redist\MicrosoftEdgeWebview2Setup.exe"
+    StrCpy $6 "$TEMP\MicrosoftEdgeWebview2Setup.exe"
     Goto install_webview2
   !endif
 
   !if "${INSTALLWEBVIEW2MODE}" == "offlineInstaller"
-    CreateDirectory "$INSTDIR\redist"
-    File "/oname=$INSTDIR\redist\MicrosoftEdgeWebView2RuntimeInstaller.exe" "${WEBVIEW2INSTALLERPATH}"
+    Delete "$TEMP\MicrosoftEdgeWebView2RuntimeInstaller.exe"
+    File "/oname=$TEMP\MicrosoftEdgeWebView2RuntimeInstaller.exe" "${WEBVIEW2INSTALLERPATH}"
     DetailPrint "$(installingWebview2)"
-    StrCpy $6 "$INSTDIR\redist\MicrosoftEdgeWebView2RuntimeInstaller.exe"
+    StrCpy $6 "$TEMP\MicrosoftEdgeWebView2RuntimeInstaller.exe"
     Goto install_webview2
   !endif