wlroots_0_12: init at 0.12.0

Uses the old wlroots in places where the new one isn't yet compatible.

Co-authored-by: Alyssa Ross <hi@alyssa.is>
Co-authored-by: Michael Weiss <dev.primeos@gmail.com>

pkgs/development/libraries/wlroots/0.12.nix

@@ -0,0 +1,57 @@
+{ lib, stdenv, fetchFromGitHub, meson, ninja, pkg-config, wayland
+, libGL, wayland-protocols, libinput, libxkbcommon, pixman
+, xcbutilwm, libX11, libcap, xcbutilimage, xcbutilerrors, mesa
+, libpng, ffmpeg
+}:
+
+# Fixed version derivation.
+# nixpkgs-update: no auto update
+stdenv.mkDerivation rec {
+  pname = "wlroots";
+  version = "0.12.0";
+
+  src = fetchFromGitHub {
+    owner = "swaywm";
+    repo = "wlroots";
+    rev = version;
+    sha256 = "01j38lmgs2c6fq68v8b75pkilia2wsgzgp46ivfbi9hhx47kgcfn";
+  };
+
+  # $out for the library and $examples for the example programs (in examples):
+  outputs = [ "out" "examples" ];
+
+  nativeBuildInputs = [ meson ninja pkg-config wayland ];
+
+  buildInputs = [
+    libGL wayland wayland-protocols libinput libxkbcommon pixman
+    xcbutilwm libX11 libcap xcbutilimage xcbutilerrors mesa
+    libpng ffmpeg
+  ];
+
+  mesonFlags = [ "-Dlogind-provider=systemd" "-Dlibseat=disabled" ];
+
+  postFixup = ''
+    # Install ALL example programs to $examples:
+    # screencopy dmabuf-capture input-inhibitor layer-shell idle-inhibit idle
+    # screenshot output-layout multi-pointer rotation tablet touch pointer
+    # simple
+    mkdir -p $examples/bin
+    cd ./examples
+    for binary in $(find . -executable -type f -printf '%P\n' | grep -vE '\.so'); do
+      cp "$binary" "$examples/bin/wlroots-$binary"
+    done
+  '';
+
+  meta = with lib; {
+    description = "A modular Wayland compositor library";
+    longDescription = ''
+      Pluggable, composable, unopinionated modules for building a Wayland
+      compositor; or about 50,000 lines of code you were going to write anyway.
+    '';
+    inherit (src.meta) homepage;
+    changelog = "https://github.com/swaywm/wlroots/releases/tag/${version}";
+    license     = licenses.mit;
+    platforms   = platforms.linux;
+    maintainers = with maintainers; [ primeos ];
+  };
+}