+ AllowSameVersionUpgrades="yes" to <MajorUpgrade>
windows-msi.yml — in the ‘Extract version’ step, calculate a unique GUID
based on the commit’s SHA, then pass -d ‘ProductCode=$productGuid’ to the WIX build
This ensures that each build will have a different ProductCode → MajorUpgrade will always be triggered
- Use SetProperty + WixQuietExec two-step pattern to pass runtime
INSTALLDIR to a deferred CustomAction (fixes WIX1077 and WIX0400)
- Add WixToolset.Util.wixext/7.0.0 extension (required for WixQuietExec)
- Fix condition syntax: collapse multi-line conditions to single line
- Add -ext WixToolset.Util.wixext to wix build command in windows-msi.yml
**`build-aux/windows/QElectroTech.wxs`**
- Desktop and Start Menu shortcuts now point directly to `bin\qelectrotech.exe` with all required arguments (`--common-elements-dir`, `--common-tbt-dir`, `--lang-dir`, `-style windowsvista`) — no `.bat` wrapper needed
- Added a deferred `CustomAction` that runs after `InstallFiles` and recursively sets all files in `elements\` to read-only using an inline PowerShell command
**`.github/workflows/windows-msi.yml`**
- Replaced the step that created `Lancer QET.bat` with a step that removes it from the artifact before the WiX build, so it is not embedded in the MSI
- The `.bat` file remains untouched in the ZIP portable build (managed by `windows-build.yml`)
- No console window flashing when launching QElectroTech from the MSI shortcuts
- The `elements\` directory is properly set to read-only after installation, as required
- Cleaner MSI package — no `.bat` file shipped to end users installing via MSI
Laurent Trinques