The flatpak CI was failing at "Downloading sources" with "No space left
on device": flatpak-cargo-generator walks the whole workspace Cargo.lock
and emits a `type: git` source for the windows-rs crates (windows +
windows-reactor + ~12 sub-crates, pinned by punktfunk-client-windows),
and flatpak-builder then FULL-clones that multi-GB repo — for a bundle
that only ever compiles `-p punktfunk-client-linux` and never touches a
windows-* crate.
New packaging/flatpak/prune-windows-lock.py writes a copy of Cargo.lock
with the windows-rs git packages stripped (matches on the `source =`
line, so a crate that merely lists a windows dependency is kept;
dependency-free so it also runs on the Deck's stock python). Both the CI
and build-flatpak.sh feed that pruned lock to the generator. The
committed Cargo.lock is untouched — cargo --offline only needs vendored
sources for the crates it actually builds, and the windows-rs crates are
not in the Linux client's dependency closure.
Verified locally: 14 crates pruned (507 -> 493 packages), zero windows-rs
`source =` lines remain, output parses as TOML, all Linux-client deps
(gtk4/ffmpeg-sys-next/sdl3/pipewire) intact.
This unblocks the flatpak build carrying the VAAPI green-screen fix
(64b1679) for the Steam Deck.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
