actions(macos): build .dmg disk images

Signed-off-by: mctaylors <cantsendmails@mctaylors.ru>

.github/actions/package/macos/action.yml

@@ -91,17 +91,35 @@ runs:
             --password '${{ inputs.apple-notarize-password }}'
 
           xcrun stapler staple "Prism Launcher.app"
+          rm "../PrismLauncher.zip"
         else
           echo ":warning: Skipping notarization as credentials are not present." >> $GITHUB_STEP_SUMMARY
         fi
-        ditto -c -k --sequesterRsrc --keepParent "Prism Launcher.app" ../PrismLauncher.zip
+
+    - name: Create DMG
+      shell: bash
+      env:
+        INSTALL_DIR: install
+      run: |
+        cd ${{ env.INSTALL_DIR }}
+
+        mkdir -p src
+        cp -R "Prism Launcher.app" src/
+
+        ln -s /Applications src/
+
+        hdiutil create \
+            -volname "Prism Launcher ${{ inputs.version }}" \
+            -srcfolder src \
+            -ov -format ULMO \
+            "../PrismLauncher.dmg"
 
     - name: Make Sparkle signature
       shell: bash
       run: |
         if [ '${{ inputs.sparkle-ed25519-key }}' != '' ]; then
           echo '${{ inputs.sparkle-ed25519-key }}' > ed25519-priv.pem
-          signature=$(/opt/homebrew/opt/openssl@3/bin/openssl pkeyutl -sign -rawin -in ${{ github.workspace }}/PrismLauncher.zip -inkey ed25519-priv.pem | openssl base64 | tr -d \\n)
+          signature=$(/opt/homebrew/opt/openssl@3/bin/openssl pkeyutl -sign -rawin -in ${{ github.workspace }}/PrismLauncher.dmg -inkey ed25519-priv.pem | openssl base64 | tr -d \\n)
           rm ed25519-priv.pem
           cat >> $GITHUB_STEP_SUMMARY << EOF
         ### Artifact Information :information_source:
@@ -118,4 +136,4 @@ runs:
       uses: actions/upload-artifact@v6
       with:
         name: PrismLauncher-${{ inputs.artifact-name }}-${{ inputs.version }}-${{ inputs.build-type }}
-        path: PrismLauncher.zip
+        path: PrismLauncher.dmg