Mac OS X Automator for showing SHA sums in the Finder Menu Quick Actions

gistfile1.txt

# in Automator go for New - Quick Action 
#       Run Shell Script, Workflow receives current: "files or folders" in "Finder.app"  
#         shell Pass Input: As Arguments
# then the automation will be present in Finder right click Quick Actions 

for f in "$@"
do
  hash=$(shasum -a 256 "$f" | awk '{print $1}' | fold -w32)
  button=$(osascript -e "display dialog \"File: $f\n\nSHA256:\n$hash\n\n\" with title \"SHA256 Hash\" buttons {\"Copy to clipboard\", \"OK\"} default button 2")
  if [[ $button == *"Copy"* ]]; then
    printf "%s" "$hash" | tr -d '\n' | pbcopy
  fi
done