Get list of a file/directory's macOS color tags

macos_color_tags.sh

# macOS Color Tags
# A shell utility for printing the list of macOS color tags 
# assigned to a file or directory.
# Written by: C. Seth Parker

# Usage: 
# % source macos_color_tags.sh
# % macos_color_tags foo.txt
# % macos_color_tags bar/

macos_color_tags() {
  usage="Usage: macos_color_tags [file|dir]"
  if [ "$#" -eq 0 ]; then
    echo ${usage}
    return
  elif [ "$#" -gt 1 ]; then
    echo "Error: Provided more than one argument"
    echo ${usage}
    return
  fi

  xattr -p com.apple.metadata:_kMDItemUserTags "$1" \
  | iconv -c \
  | sed -n -E 's/.*(Red|Orange|Yellow|Green|Blue|Purple|Gray).*/\1/p'
}