cmake only in prep

Signed-off-by: Anas Nashif <[email protected]>

Author: nashif

.github/workflows/twister.yaml

@@ -124,6 +124,10 @@ jobs:
           echo "subset=${subset}" >> $GITHUB_OUTPUT
           echo "size=${size}" >> $GITHUB_OUTPUT
           echo "fullrun=${TWISTER_FULL}" >> $GITHUB_OUTPUT
+      - name: generate filter cache
+        if:  github.event_name == 'push'
+        run: |
+          ./scripts/twister --cmake-only -T samples/syncronization --outdir filter_cache
 
   twister-build:
     runs-on: