Shell:$PWD,$(),basename,date,get-output-from-another-script
# zip_magento_media.sh:
WORKING_DIR=$PWD
MAGENTO_BASE_NAME=$(basename "$mage_root")
OUTPUT_FILE_NAME=magento-media-$(date +%Y%m%d-%H%M%S).zip
cd $mage_root
cd ..
zip -r "$WORKING_DIR/$OUTPUT_FILE_NAME" $MAGENTO_BASE_NAME/media >&2
echo "$OUTPUT_FILE_NAME"
# To get the "output file name" in another script:
MAGE_MEDIA_ZIP=$(. $LOCAL_HELPER_HOME/zip_magento_media.sh)