github.com/GoogleContainerTools/skaffold/v2@v2.13.2/integration/testdata/build/multi-env/Dockerfile (about)

     1  FROM busybox
     2  
     3  ENV file1=file1 \
     4      file2=file2
     5  
     6  COPY $file1 $file2 /data/
     7  RUN [ "$(find /data -type f | wc -l | xargs)" == "2" ]