Add macOS .app bundle packaging with styled DMG

.github/workflows/build-release.yml

@@ -365,7 +365,7 @@ jobs:
 
       - name: Restore dependencies
         working-directory: src
-        run: dotnet restore UniGetUI.Avalonia/UniGetUI.Avalonia.csproj
+        run: dotnet restore UniGetUI.Avalonia/UniGetUI.Avalonia.csproj --runtime ${{ matrix.runtime }}
 
       - name: Publish
         working-directory: src
@@ -376,25 +376,52 @@ jobs:
             --self-contained true \
             --output ../bin/${{ matrix.name }}
 
+      - name: Install macOS packaging tools
+        if: runner.os == 'macOS'
+        run: brew install create-dmg
+
       - name: Package (macOS)
         if: runner.os == 'macOS'
         run: |
-          mkdir -p output
+          set -euo pipefail
+          VERSION='${{ needs.preflight.outputs.package-version }}'
+          APP_BUNDLE="UniGetUI.app"
+          APP_EXECUTABLE="UniGetUI.Avalonia"
 
-          # .tar.gz
-          tar -czf output/UniGetUI.${{ matrix.name }}.tar.gz -C bin/${{ matrix.name }} .
-
-          # .dmg — create a staging folder, then convert to a compressed read-only image
-          DMG_STAGING=$(mktemp -d)
-          trap "rm -rf '$DMG_STAGING'" EXIT
-          mkdir -p "$DMG_STAGING/UniGetUI"
-          cp -R bin/${{ matrix.name }}/. "$DMG_STAGING/UniGetUI/"
-          hdiutil create \
-            -volname "UniGetUI" \
-            -srcfolder "$DMG_STAGING" \
-            -ov \
-            -format UDZO \
-            output/UniGetUI.${{ matrix.name }}.dmg
+          rm -rf "${APP_BUNDLE}" output
+          mkdir -p output
+          mkdir -p "${APP_BUNDLE}/Contents/MacOS"
+          mkdir -p "${APP_BUNDLE}/Contents/Resources"
+
+          cp -R "bin/${{ matrix.name }}/." "${APP_BUNDLE}/Contents/MacOS/"
+          chmod +x "${APP_BUNDLE}/Contents/MacOS/${APP_EXECUTABLE}"
+          sed "s|@VERSION@|${VERSION}|g" \
+            scripts/macos/Info.plist \
+            > "${APP_BUNDLE}/Contents/Info.plist"
+          cp scripts/macos/UniGetUI.icns "${APP_BUNDLE}/Contents/Resources/"
+
+          # Temporary ad-hoc signing only; proper Developer ID signing/notarization comes later.
+          find "${APP_BUNDLE}/Contents/MacOS" -type f | while IFS= read -r f; do
+            codesign --force --sign - "$f" 2>/dev/null || true
+          done
+          codesign --force --sign - "${APP_BUNDLE}"
+
+          COPYFILE_DISABLE=1 tar -czf "output/UniGetUI.${{ matrix.name }}.tar.gz" "${APP_BUNDLE}"
+
+          create-dmg \
+            --volname "UniGetUI" \
+            --volicon "scripts/macos/UniGetUI.icns" \
+            --window-pos 200 120 \
+            --window-size 600 400 \
+            --icon-size 128 \
+            --icon "UniGetUI.app" 150 185 \
+            --hide-extension "UniGetUI.app" \
+            --app-drop-link 450 185 \
+            "output/UniGetUI.${{ matrix.name }}.dmg" \
+            "${APP_BUNDLE}"
+
+          test -f "output/UniGetUI.${{ matrix.name }}.tar.gz"
+          test -f "output/UniGetUI.${{ matrix.name }}.dmg"
 
       - name: Install Linux packaging tools
         if: runner.os == 'Linux'

scripts/macos/Info.plist

@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+    <key>CFBundleIdentifier</key>
+    <string>io.github.marticliment.unigetui</string>
+    <key>CFBundleName</key>
+    <string>UniGetUI</string>
+    <key>CFBundleDisplayName</key>
+    <string>UniGetUI</string>
+    <key>CFBundleExecutable</key>
+    <string>UniGetUI.Avalonia</string>
+    <key>CFBundleIconFile</key>
+    <string>UniGetUI</string>
+    <key>CFBundlePackageType</key>
+    <string>APPL</string>
+    <key>CFBundleVersion</key>
+    <string>@VERSION@</string>
+    <key>CFBundleShortVersionString</key>
+    <string>@VERSION@</string>
+    <key>NSHighResolutionCapable</key>
+    <true/>
+    <key>LSMinimumSystemVersion</key>
+    <string>12.0</string>
+    <key>NSPrincipalClass</key>
+    <string>NSApplication</string>
+</dict>
+</plist>