electron-builder resolves every piece of packaging artwork from the workspace
— the app icon, the icon.ico extraResource, the MSIX logo set before-build
stages into build/appx, and the exe identity stamp — so a flavored canary or
commit build copies its rendered icon set over apps/desktop/assets before
packaging.
Those files stopped being gitignored in 4b7229d612, which turned a write that
was invisible into 15 dirty paths. The source custody check then refuses the
checkout twice: inside the same build, at the check that used to sit after the
copy, and on every later build from the first check on a now permanently dirty
tree.
Hold the render at the workspace path for the packaging window only and
restore the admitted files afterwards, whether packaging finished or failed.
The final custody check now asserts the build handed the checkout back.
4bc38bceec