Build LM Studio for aarch64 (#885)

Co-authored-by: Jim Martin <jimmartin@gmail.com>

pkgbuilds/lmstudio-bin/PKGBUILD

@@ -1,11 +1,11 @@
 # Maintainer: noureddinex
 pkgname=lmstudio-bin
 pkgver=0.4.25
-pkgrel=3
+pkgrel=4
 _build=1
 _pkgver=${pkgver}-${_build}
 pkgdesc="LM Studio - A desktop app for exploring and running large language models locally"
-arch=('x86_64')
+arch=('x86_64' 'aarch64')
 url="https://lmstudio.ai"
 license=('EULA')
 depends=('fuse2' 'zlib' 'hicolor-icon-theme' 'gtk3' 'nss' 'libxcrypt-compat')
@@ -13,13 +13,25 @@ options=('!strip')
 install=lmstudio-bin.install
 provides=(lmstudio)
 conflicts=(lmstudio)
-source=("https://installers.lmstudio.ai/linux/x64/${_pkgver}/LM-Studio-${_pkgver}-x64.AppImage"
-         "lmstudio.png"
-         "lmstudio.desktop")
-sha256sums=('eca467446c833824697e8befab300fe5269fdf984e3ee4385fcbad8502f07c53' '9f791789c959a11316328692807737a5f1bc1c170ae99ec04c56bfd8ee8263e5' '16b67b6cd672a05b9a0e012c8b9a91187ceda8f85b3391db471298c54e002bcd')
+source=("lmstudio.png"
+        "lmstudio.desktop")
+source_x86_64=("https://installers.lmstudio.ai/linux/x64/${_pkgver}/LM-Studio-${_pkgver}-x64.AppImage")
+source_aarch64=("https://installers.lmstudio.ai/linux/arm64/${_pkgver}/LM-Studio-${_pkgver}-arm64.AppImage")
+sha256sums=('9f791789c959a11316328692807737a5f1bc1c170ae99ec04c56bfd8ee8263e5' '16b67b6cd672a05b9a0e012c8b9a91187ceda8f85b3391db471298c54e002bcd')
+sha256sums_x86_64=('eca467446c833824697e8befab300fe5269fdf984e3ee4385fcbad8502f07c53')
+sha256sums_aarch64=('e3ef32a37656e7e4e5cdadf52e72fa929d5f26eb6007be1666c76e4fdba8e084')
+
+# LM Studio names its AppImages by a vendor architecture suffix. Resolve it in the
+# functions so sourcing the PKGBUILD without CARCH still reads the version.
+_appimage() {
+  case "$CARCH" in
+    x86_64) echo "LM-Studio-${_pkgver}-x64.AppImage" ;;
+    aarch64) echo "LM-Studio-${_pkgver}-arm64.AppImage" ;;
+  esac
+}
 
 prepare() {
-  chmod +x "${srcdir}/${source[0]##*/}"
+  chmod +x "${srcdir}/$(_appimage)"
 }
 
 package() {
@@ -27,7 +39,7 @@ package() {
   install -dm755 "$pkgdir/opt/lm-studio"
   
   # Install AppImage
-  install -Dm755 "${srcdir}/${source[0]##*/}" "$pkgdir/opt/lm-studio/lm-studio.AppImage"
+  install -Dm755 "${srcdir}/$(_appimage)" "$pkgdir/opt/lm-studio/lm-studio.AppImage"
   
   # Install static icon
   install -Dm644 "${srcdir}/lmstudio.png" "${pkgdir}/usr/share/icons/hicolor/512x512/apps/lmstudio-bin.png"