A script to extract images from XLSX file

eximage.sh

#!/bin/bash
# A script to extract images from XLSX file

# Usage:
#   chmod u+x ./eximage.sh
#   bash ./eximage.sh __PATH_TO_FILE__

SCRIPT_NAME="$(basename ${0})"
TARGET_PATH="${1}"
TARGET_FILENAME="$(basename ${TARGET_PATH})"
TARGET_EXTENSION="${TARGET_FILENAME##*.}"

printError() {
  echo "[${SCRIPT_NAME}] ERROR: ${@:=Something went wrong.}" 1>&2
}
if [[ -x "$(command -v unzip)" ]]; then
  printError "The command 'unzip' is not available."
elif [[ ! -r "${TARGET_PATH}" || "${TARGET_EXTENSION}" != "xlsx" ]]; then
  printError "The target file '${TARGET_PATH}' must be readable XLSX file."
fi

OPEN_PATH="${2:=xl/media}"
DST_DIR="${TMPDIR:=/var/tmp}/${SCRIPT_NAME}/$(date +%s)_${TARGET_FILENAME%.*}"
TMP_FILE="${DST_DIR}/${TARGET_FILENAME}.zip"
mkdir -p "${DST_DIR}" && cp "${TARGET_PATH}" "${TMP_FILE}" && unzip "${TMP_FILE}" -d "${DST_DIR}"
[[ -x "$(command -v open)" ]] && open "${DST_DIR}/${OPEN_PATH}"

Inspired by https://stackoverflow.com/a/8919636

For Alfred PowerPack users: eximage.alfredworkflow