Create Portable nightly builds for Windows

.github/workflows/ci_windows_mu4.yml

@@ -253,7 +253,7 @@ jobs:
         fi
 
         DO_PUBLISH='false'
-        if [[ "${{ github.event.inputs.publish }}" == "on" ]]; then 
+        if [[ "${{ github.event.inputs.publish }}" == "on" || "$BUILD_MODE" == "nightly_build" ]]; then 
           DO_PUBLISH='true'
           if [ -z "${{ secrets.OSUOSL_SSH_ENCRYPT_SECRET }}" ]; then 
             echo "warning: not set OSUOSL_SSH_ENCRYPT_SECRET, publish disabled" 
@@ -336,7 +336,7 @@ jobs:
       if: env.DO_PUBLISH == 'true'
       shell: bash
       run: |
-        bash ./build/ci/tools/osuosl/publish.sh -s ${{ secrets.OSUOSL_SSH_ENCRYPT_SECRET }} --os windows -v 4
+        bash ./build/ci/tools/osuosl/publish.sh -s ${{ secrets.OSUOSL_SSH_ENCRYPT_SECRET }} --os windows -v 4 --arch x86_64-portable
     - name: Upload artifacts on GitHub
       if: env.DO_BUILD == 'true'
       uses: actions/upload-artifact@v3

build/ci/tools/osuosl/publish.sh

@@ -118,7 +118,9 @@ if [ "$BUILD_MODE" == "nightly_build" ]; then
     echo "Delete old MuseScoreNightly files"
     number_to_keep=42 # includes the one we just uploaded and the symlink to it
     if [ "$OS" == "linux" ]; then
-      ((++number_to_keep)) # one extra for the zsync file
+        ((++number_to_keep)) # one extra for the zsync file
+    elif [ "$OS" == "windows" ]; then
+        ((number_to_keep *= 2)) # two nightlies each night, namely portable and normal
     fi
     ssh -i $SSH_KEY musescore-nightlies@ftp-osl.osuosl.org "cd ~/ftp/$FTP_PATH; ls MuseScoreNightly* -t | tail -n +${number_to_keep} | xargs rm -f"
 fi