Roam backup shell script

roam-backup.sh

#!/bin/sh -e

# Script I wrote before I realized
# https://github.com/MatthieuBizien/roam-to-git exists

if [ "$#" -eq 1 ]; then
    LAST_ROAM_EXPORT=$1
elif [ "$#" -eq 0 ]; then
    echo "Attempting to use XDG info to find roam export."
    # Load XDG dir configuration into variables
    DOWNLOAD_DIR=$(xdg-user-dir DOWNLOAD)

    # Finds the last modified Roam-Export-*.zip file in downloads.
    LAST_ROAM_EXPORT=$(find $DOWNLOAD_DIR -type f -name Roam-Export-*.zip -printf "%T@\t%p\n" | sort -n | cut -f 2- | tail -1)
else
    echo "Expected only one argument indicating the Roam-Export-*.zip to extract"
    exit 1
fi

echo "Extracting $LAST_ROAM_EXPORT"

unzip -u $LAST_ROAM_EXPORT

ZIP_INFO=$(zipinfo -1 $LAST_ROAM_EXPORT)
ZIP_INFO_LINE_COUNT=$(echo $ZIP_INFO | wc -l)

if [ $ZIP_INFO_LINE_COUNT != '1' ]; then
   echo "Only one file expected in $LAST_ROAM_EXPORT. Instead got:\n$ZIP_INFO"
   exit 1
fi

JSON_FILE=$(echo $ZIP_INFO | tail -1)
PRETTY_JSON_FILE="pretty-$JSON_FILE"

echo "Storing pretty-printed version of $JSON_FILE in $PRETTY_JSON_FILE"

$(cat $JSON_FILE | python -m json.tool > $PRETTY_JSON_FILE)

echo "Deleting $JSON_FILE"
rm $JSON_FILE