nix: change build system to meson

flake.nix: change wlroots url to mirror, update version
flake.lock: update wlroots & nixpkgs
nix/update-inputs.sh: update wlroots url

nix/default.nix

@@ -3,7 +3,7 @@
   stdenv,
   fetchFromGitHub,
   pkg-config,
-  cmake,
+  meson,
   ninja,
   libdrm,
   libinput,
@@ -27,7 +27,7 @@ stdenv.mkDerivation {
   src = ../.;
 
   nativeBuildInputs = [
-    cmake
+    meson
     ninja
     pkg-config
   ];
@@ -48,33 +48,14 @@ stdenv.mkDerivation {
     ]
     ++ lib.optional enableXWayland xwayland;
 
-  cmakeFlags =
-    ["-DCMAKE_BUILD_TYPE=Release"]
-    ++ lib.optional (!enableXWayland) "-DNO_XWAYLAND=true";
+  mesonBuildType = "release";
 
-  # enables building with nix-supplied wlroots instead of submodule
-  prePatch = ''
-    sed -Ei 's/"\.\.\/wlroots\/include\/([a-zA-Z0-9./_-]+)"/<\1>/g' src/includes.hpp
-  '';
-  postPatch = ''
-    make protocols
-  '';
+  mesonFlags = lib.optional (!enableXWayland) "-DNO_XWAYLAND=true";
 
-  postBuild = ''
-    pushd ../hyprctl
-    make all
-    popd
-  '';
-
-  installPhase = ''
-    pushd ..
-    install -Dm644 ./example/hyprland.desktop -t $out/share/wayland-sessions
-    install -Dm755 ./build/Hyprland -t $out/bin
-    install -Dm755 ./hyprctl/hyprctl -t $out/bin
-    install -Dm644 ./assets/* -t $out/share/hyprland
-    install -Dm644 ./example/hyprland.conf -t $out/share/hyprland
-    popd
-  '';
+  patches = [
+    # make meson use the provided wlroots instead of the git submodule
+    ./meson-build.patch
+  ];
 
   passthru.providedSessions = ["hyprland"];
 

nix/meson-build.patch

@@ -0,0 +1,36 @@
+diff --git a/meson.build b/meson.build
+index 22ee4bf..5528613 100644
+--- a/meson.build
++++ b/meson.build
+@@ -2,16 +2,10 @@ project('Hyprland', 'cpp', 'c',
+   version : '0.1',
+   default_options : ['warning_level=3', 'cpp_std=c++20', 'default_library=static'])
+
+-wlroots = subproject('wlroots', default_options: ['examples=false'])
+-have_xwlr = wlroots.get_variable('features').get('xwayland')
++wlroots = dependency('wlroots', version: '>=0.16.0')
+ xcb_dep = dependency('xcb', required: get_option('xwayland'))
+
+-if get_option('xwayland').enabled() and not have_xwlr
+-	error('Cannot enable Xwayland in Hyprland: wlroots has been built without Xwayland support')
+-endif
+-have_xwayland = xcb_dep.found() and have_xwlr
+-
+-if not have_xwayland
++if not xcb_dep.found()
+ add_project_arguments('-DNO_XWAYLAND', language: 'cpp')
+ endif
+
+diff --git a/src/meson.build b/src/meson.build
+index 5d64188..a676333 100644
+--- a/src/meson.build
++++ b/src/meson.build
+@@ -7,7 +7,7 @@ executable('Hyprland', src,
+     server_protos,
+     dependency('wayland-server'),
+     dependency('wayland-client'),
+-    wlroots.get_variable('wlroots'),
++    wlroots,
+     dependency('cairo'),
+     dependency('pango'),
+     dependency('pangocairo'),

nix/update-inputs.sh

@@ -10,7 +10,7 @@ if [ $SUB_REV != $CRT_REV ]; then
   nix flake lock --update-input nixpkgs
 
   # update wlroots to submodule revision
-  nix flake lock --override-input wlroots "gitlab:wlroots/wlroots/$SUB_REV?host=gitlab.freedesktop.org"
+  nix flake lock --override-input wlroots "github:ThatOneCalculator/wlroots-mirror/$SUB_REV"
 
   # remove "dirty" mark from lockfile
   jq < flake.lock 'del(.nodes.wlroots.original.rev)' | sponge flake.lock