Integrate the vala example into the project

.github/workflows/build_and_test.yml

@@ -25,7 +25,3 @@ jobs:
       run: ninja -C build test
     - name: Install
       run: sudo ninja -C build install
-    - name: Meson Vala example
-      run: cd examples/vala-standalone && meson ../../vala-build
-    - name: Build Vala example
-      run: ninja -C vala-build

README.md

@@ -29,7 +29,7 @@ The easiest way to build against GTK Layer Shell is to use the `gtk-layer-shell-
 [examples/simple-example.py](examples/simple-example.py) contains sample Python code.
 
 ### Vala
-[examples/vala-standalone](examples/vala-standalone) contains a minimal working standalone Vala project, see [the readme](examples/vala-standalone/README.md) for details.
+[examples/simple-example.vala](examples/simple-example.vala) contains a minimal working Vala app.
 
 ### Rust
 [@pentamassiv](https://github.com/pentamassiv) maintains [safe Rust bindings](https://github.com/pentamassiv/gtk4-layer-shell-gir) and the [crates.io crate](https://crates.io/crates/gtk4-layer-shell/). Rust examples can be found [here](https://github.com/pentamassiv/gtk4-layer-shell-gir/tree/main/gtk4-layer-shell/examples).
@@ -63,7 +63,7 @@ sudo apt install meson libwayland-dev libgtk-4-dev gobject-introspection libgire
 * `-Ddocs` (default `false`): If to generate the docs
 * `-Dtests` (default `false`): If to build the tests
 * `-Dintrospection` (default: `true`): If to build GObject Introspection data (used for bindings to languages other than C/C++)
-* `-Dvapi` (default: `true`): If to build VAPI data (allows this library to be used in Vala). Requires `-Dintrospection=true`
+* `-Dvapi` (default: `true`): If to build VAPI data and Vala example. The VAPI file allows this library to be used in Vala. Requires `-Dintrospection=true`
 
 ### Running the Tests
 * `ninja -C build test`

examples/meson.build

@@ -1,5 +1,4 @@
 subdir('demo')
-# vala-standalone is it's own meson project, so do not subdir() it
 
 executable(
     'gtk4-layer-demo',
@@ -14,3 +13,12 @@ executable(
     build_by_default: get_option('examples'),
     dependencies: [gtk, gtk_layer_shell],
     install: false)
+
+if get_option('vapi')
+    add_languages('vala')
+    executable(
+        'simple-example-vala',
+        files('simple-example.vala'),
+        dependencies: [gtk, gtk_layer_shell, vapi],
+        install: false)
+endif

src/meson.build

@@ -37,7 +37,7 @@ if get_option('introspection')
         install: true)
 
     if get_option('vapi')
-        gnome.generate_vapi(
+        vapi = gnome.generate_vapi(
             pkg_config_name,
             sources: gir[0],
             packages: 'gtk4',