rp3: build libcamera and rpicam-apps from the Raspberry Pi foundation

hardware/rp3.nix

@@ -25,10 +25,6 @@ in
 
   hardware.enableRedistributableFirmware = true;
 
-  environment.systemPackages = with pkgs; [
-    libraspberrypi
-  ];
-
   services.journald.extraConfig = ''
     Storage = volatile
     RuntimeMaxFileSize = 10M

modules/camera.nix

@@ -1,3 +1,10 @@
-{ config, ... }:
+{ config, pkgs, ... }:
 
-{ }
+{
+  nixpkgs.overlays = [ (import ../overlays/libcamera.nix) ];
+
+  environment.systemPackages = with pkgs; [
+    (callPackage ../rpicam-apps.nix { })
+    libcamera
+  ];
+}

overlays/libcamera.nix

@@ -0,0 +1,33 @@
+final: prev: {
+  libcamera = prev.libcamera.overrideAttrs (old: {
+    buildInputs = old.buildInputs ++ [ prev.boost prev.nlohmann_json ];
+    nativeBuildInputs = old.nativeBuildInputs ++ [ prev.python3Packages.pybind11 ];
+
+    BOOST_INCLUDEDIR = "${prev.lib.getDev prev.boost}/include";
+    BOOST_LIBRARYDIR = "${prev.lib.getLib prev.boost}/lib";
+
+    postPatch = old.postPatch + ''
+      patchShebangs src/py/libcamera
+    '';
+
+    src = prev.fetchFromGitHub {
+      owner = "raspberrypi";
+      repo = "libcamera";
+      rev = "6ddd79b5bdbedc1f61007aed35391f1559f9e29a";
+      sha256 = "eFIiYCsuukPuG6iqHZeKsXQYSuZ+9q5oLNwuJJ+bAhk=";
+
+      nativeBuildInputs = [ prev.git ];
+
+      postFetch = ''
+        cd "$out"
+
+        export NIX_SSL_CERT_FILE=${prev.cacert}/etc/ssl/certs/ca-bundle.crt
+
+        ${prev.lib.getExe prev.meson} subprojects download \
+          libpisp
+
+        find subprojects -type d -name .git -prune -execdir rm -r {} +
+      '';
+    };
+  });
+}

rpicam-apps.nix

@@ -0,0 +1,70 @@
+{ stdenv
+, fetchFromGitHub
+, lib
+, meson
+, ninja
+, pkg-config
+, boost
+, ffmpeg
+, libcamera
+, libdrm
+, libepoxy
+, libexif
+, libjpeg
+, libpng
+, libtiff
+, libX11
+, qt5
+}:
+
+stdenv.mkDerivation (finalAttrs: {
+  pname = "rpicam-apps";
+  version = "1.5.0";
+
+  src = fetchFromGitHub {
+    owner = "raspberrypi";
+    repo = "rpicam-apps";
+    rev = "v${finalAttrs.version}";
+    hash = "sha256-s4zJh6r3VhiquO54KWZ78dVCH1BmlphY9zEB9BidNyo=";
+  };
+
+  buildInputs = [
+    boost
+    ffmpeg
+    libcamera
+    libdrm
+    libepoxy
+    libexif
+    libjpeg
+    libpng
+    libtiff
+    libX11
+    qt5.qtbase
+  ];
+
+  nativeBuildInputs = [
+    meson
+    ninja
+    pkg-config
+    qt5.wrapQtAppsHook
+  ];
+
+  # Meson is no longer able to pick up Boost automatically.
+  # https://github.com/NixOS/nixpkgs/issues/86131
+  BOOST_INCLUDEDIR = "${lib.getDev boost}/include";
+  BOOST_LIBRARYDIR = "${lib.getLib boost}/lib";
+
+  mesonFlags = [
+    "-Denable_hailo=disabled"
+    # maybe also disabled QT: "-Denable_qt=disabled"
+    # See all options here: https://github.com/raspberrypi/rpicam-apps/blob/main/meson_options.txt
+  ];
+
+  meta = with lib; {
+    description = "Small suite of libcamera-based apps that aim to copy the functionality of the existing 'raspicam' apps.";
+    homepage = "https://github.com/raspberrypi/rpicam-apps";
+    license = licenses.bsd2;
+    maintainers = with maintainers; [ jpds ];
+    platforms = platforms.linux;
+  };
+})