meson & nix: install wlroots headers (#2287)

subprojects/packagefiles/wlroots-meson-build.patch

@@ -0,0 +1,45 @@
+diff --git a/include/meson.build b/include/meson.build
+index e669800..687786b 100644
+--- a/include/meson.build
++++ b/include/meson.build
+@@ -1,4 +1,5 @@
+-subdir('wlr')
++run_command('ln', '-s', join_paths(meson.project_source_root(), 'include', 'wlr'), join_paths(meson.project_source_root(), 'include', 'wlroots'), check: true)
++subdir('wlroots')
+ 
+ exclude_files = ['meson.build', 'config.h.in', 'version.h.in']
+ if not features.get('drm-backend')
+@@ -24,8 +25,8 @@ if not features.get('session')
+ 	exclude_files += 'backend/session.h'
+ endif
+ 
+-install_subdir('wlr',
+-	install_dir: get_option('includedir'),
++install_subdir('wlroots',
++	install_dir: join_paths(get_option('includedir'), 'hyprland'),
+ 	exclude_files: exclude_files,
+ )
+ 
+diff --git a/include/wlr/meson.build b/include/wlr/meson.build
+index f7ca413..0a86d54 100644
+--- a/include/wlr/meson.build
++++ b/include/wlr/meson.build
+@@ -22,4 +22,4 @@ ver_h = configure_file(
+ 	configuration: version_data,
+ )
+ 
+-install_headers(conf_h, ver_h, subdir: 'wlr')
++install_headers(conf_h, ver_h, subdir: join_paths('hyprland', 'wlroots'))
+diff --git a/meson.build b/meson.build
+index 29b103a..0b6e5a4 100644
+--- a/meson.build
++++ b/meson.build
+@@ -15,7 +15,7 @@ project(
+ # necessary for bugfix releases. Increasing soversion is required because
+ # wlroots never guarantees ABI stability -- only API stability is guaranteed
+ # between minor releases.
+-soversion = 12
++soversion = 12032
+ 
+ little_endian = target_machine.endian() == 'little'
+ big_endian = target_machine.endian() == 'big'

subprojects/wlroots.wrap

@@ -0,0 +1,7 @@
+[wrap-git]
+directory = wlroots
+url = https://gitlab.freedesktop.org/wlroots/wlroots.git
+revision = 6830bfc17fd94709e2cdd4da0af989f102a26e59
+depth = 1
+
+diff_files = wlroots-meson-build.patch