[sneurlax]

Builds on Dan's #1404 (commit 8ec9f17, unchanged). Linux camera (QR scanning) is broken in every Linux artifact we ship.

Cause

libcamera_linux.so is bundled (since #1317) but needs libopencv_wrapper.so, which the plugin never bundles, plus about 50 host libopencv_*.so.406 libraries, and its RUNPATH points at the CI build tree. It fails to load on any user machine. The flatpak also had no OpenCV and only --device=dri.

Changes on top of #1404

• Merge of current staging (finish-args keep --device=all and :create).
• Flatpak: OpenCV installs into /app/lib (it went to lib64 by default), IPP and apps off for an offline build, cleanup of headers and cmake files, WITH_LIBV4L dropped.
• Flatpak: camera-linux links with -Wl,--no-as-needed, because the SDK's --as-needed dropped its NEEDED on libopencv_wrapper.so and dlsym failed.
• Tarball and AppImage: scripts/linux/build_opencv_static.sh builds a minimal static OpenCV 4.10 (core, imgproc, imgcodecs, videoio) into the CI image at /opt/opencv-static, and the image no longer installs libopencv-dev.
• linux/CMakeLists.txt template: reads STACKWALLET_OPENCV_DIR, bundles the wrapper, RUNPATH $ORIGIN, static libstdc++, --exclude-libs,ALL, -Bsymbolic.
• prepare_release_bundle.py: fails the build if the camera libraries don't load from the bundle; --check-only mode for the AppImage; 7 unit tests.
• CI: a composite action .github/actions/static-opencv with a cache keyed on the script hash.

Tested, with a real USB webcam (Depstech, /dev/video0)

Artifact	Result
Flatpak, this repo's manifest (24.08), built in Docker	live preview in the app's QR dialog; native capture 640x480
Tarball libs, Ubuntu 24.04 / Fedora 44 / Debian 13 containers with no OpenCV	frame captured, 640x480 JPEG decodes
Tarball libs, Debian 12	doesn't load: libopencv_wrapper.so needs GLIBC_2.38. The bundle already needs 2.39 for libepic_cash_wallet.so, so this isn't new
Host dev build (system OpenCV 4.6)	live preview
The bundle check	rejects the current staging CI bundle, passes the fixed one

Not tested: Stack Duo and Campfire builds, a real CI run (nothing has gone to GitHub), the AppImage as a whole.

The same changes for release builds are in sneurlax/stack_releases PR (branch fix/flatpak-opencv-camera), because releases generate their own manifest in linux_release.dart.

libopencv-dev in the CI image?

I recommend dropping it, as this branch does. With it installed, camera-linux's find_package(OpenCV) can silently pick the shared system OpenCV, which is exactly how the current broken bundles were produced; without it the only OpenCV in the image is the static one, and the bundle check catches anything else. Developer machines still need libopencv-dev for local flutter run, and that stays in the docs.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 10.74%. Comparing base (ad1efd5) to head (98e2124).
⚠️ Report is 1 commits behind head on staging.

Additional details and impacted files

@@           Coverage Diff            @@
##           staging    #1484   +/-   ##
========================================
  Coverage    10.74%   10.74%           
========================================
  Files         1132     1132           
  Lines       113993   113993           
========================================
  Hits         12254    12254           
  Misses      101739   101739           

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