set specific version of uncrustify on CI

.github/workflows/ci_codestyle.yml

@@ -7,10 +7,10 @@ on:
 
 jobs:
   codestyle:    
-    runs-on: macos-10.15
+    runs-on: ubuntu-18.04
     steps:
     - name: Clone repository
       uses: actions/checkout@v2    
     - name: Test coding style
       run: |
-        bash ./build/ci/macos/checkcodestyle.sh
+        bash ./build/ci/linux/checkcodestyle.sh

build/ci/linux/checkcodestyle.sh

@@ -21,8 +21,10 @@
 echo "Check code style"
 trap 'echo Check code style failed; exit 1' ERR
 
-brew install uncrustify findutils
-export PATH="/usr/local/opt/findutils/libexec/gnubin:${PATH}"
+mkdir -p $HOME/build_tools/uncrustify
+wget -q --show-progress -O $HOME/build_tools/uncrustify/uncrustify "https://s3.amazonaws.com/utils.musescore.org/uncrustify/uncrustify_0.73/uncrustify"
+chmod +x $HOME/build_tools/uncrustify/uncrustify
+export PATH="$HOME/build_tools/uncrustify:${PATH}"
 tools/codestyle/uncrustify_run.sh
 
 codestyle_failed_files="$(git diff --name-only)"