Add aarch64 build via self-hosted runner; update AUR PKGBUILD for aarch64

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitea/workflows/release.yml

@@ -10,17 +10,23 @@ env:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
     strategy:
       matrix:
         include:
           - arch: x86_64
             target: x86_64-unknown-linux-gnu
+            runs-on: ubuntu-latest
+          - arch: aarch64
+            target: aarch64-unknown-linux-gnu
+            runs-on: aarch64
+
+    runs-on: ${{ matrix.runs-on }}
 
     steps:
       - uses: actions/checkout@v4
 
       - name: Install system dependencies
+        if: matrix.arch == 'x86_64'
         run: |
           sudo apt-get update
           sudo apt-get install -y libwayland-dev pkg-config

aur/PKGBUILD

@@ -3,7 +3,7 @@ pkgname=gpupaper
 pkgver=0.1.0
 pkgrel=1
 pkgdesc="Wayland layer-surface wallpaper runner powered by GLSL/WGSL fragment shaders (wgpu)"
-arch=('x86_64')
+arch=('x86_64' 'aarch64')
 url="https://prosjekt.klingenbergbygg.no/bl/gpupaper"
 license=('MIT')
 depends=('wayland' 'libglvnd')
@@ -14,8 +14,10 @@ optdepends=(
 )
 provides=('gpupaper')
 conflicts=('gpupaper-git' 'gpupaper-bin')
-source=("gpupaper-v${pkgver}-x86_64.tar.gz::https://prosjekt.klingenbergbygg.no/bl/gpupaper/releases/download/v${pkgver}/gpupaper-v${pkgver}-x86_64.tar.gz")
+source_x86_64=("gpupaper-v${pkgver}-x86_64.tar.gz::https://prosjekt.klingenbergbygg.no/bl/gpupaper/releases/download/v${pkgver}/gpupaper-v${pkgver}-x86_64.tar.gz")
-sha256sums=('SKIP')
+source_aarch64=("gpupaper-v${pkgver}-aarch64.tar.gz::https://prosjekt.klingenbergbygg.no/bl/gpupaper/releases/download/v${pkgver}/gpupaper-v${pkgver}-aarch64.tar.gz")
+sha256sums_x86_64=('SKIP')
+sha256sums_aarch64=('SKIP')
 
 package() {
     install -Dm755 gpupaper "$pkgdir/usr/bin/gpupaper"