count-shebangs

#!/usr/bin/env bash

files=0
executable=0
shebanged=0

shopt -s globstar
for f in **/*.{p6,pl6,pl}; do
    ((files++))
    [[ -x "$f" ]] && ((executable++))
    [[ "$(head -n1 "$f")" == "#!"* ]] && ((shebanged++))
done

echo "Total files: $files"
echo "Executable: $executable"
echo "With a shebang: $shebanged"