Backup iCloud directory to USB drive

backup.sh

#!/bin/bash

7zip_installed() {
    builtin type -P "7zz" &> /dev/null
}

prompt_with_default() {
    read -p "$1 ($2):" INPUT
    if [ -z "$INPUT" ]; then
        echo "$2"
    fi
    echo "$INPUT"
}

7zip_installed || { echo "7zz not found, please install using brew"; exit 1; }

SRC="$(prompt_with_default "Source path" "$HOME/Library/Mobile Documents/com~apple~CloudDocs")"
if [[ ! -d "$SRC" ]]; then
    echo "Directory does not exist: $SRC"
    exit 1
fi

DEST="$(prompt_with_default "Dest path" "$(dirname "$0")")"
if [[ ! -d "$DEST" ]]; then
    echo "Directory does not exist: $DEST"
    exit 1
fi

ARCHIVE_NAME="$(prompt_with_default "Archive name" "$(date +%Y-%m-%d-%H%M).7z")"

read -s -p "Archive password:" PASS
if [ -z "$PASS" ]; then
    echo "You did not enter a password"
    exit 1
fi
echo ""
read -s -p "Confirm password:" PASS2
if [ "$PASS" != "$PASS2" ]; then
    echo "The two passwords do not match"
    exit 1
fi

echo ""
echo "You've entered:"
echo "Source: $SRC"
echo "Dest folder: $DEST"
echo "Archive name: $ARCHIVE_NAME"
echo "This will delete all .7z files with the same name."
read -p "Proceed? (Y/n): " CORRECT
if [ "$CORRECT" != "Y" ]; then
    echo "Exiting..."
    exit 1
fi

echo "Deleting existing .7z files"
rm -f "$DEST/*.7z.*"

TMP="$(mktemp -d -t 'backup')"
echo "Using $TMP as a scratch space"
cd "$TMP"

echo "Copying files to temp directory"
cp -R "$SRC/." ./

echo "Creating README.txt"
cat <<EOF > ./README.txt
This was created using backup.sh on $(date).
EOF

echo "Creating temp archive files"
7zz -v500m -mhc=on -mhe=on -p"$PASS" a "$ARCHIVE_NAME" "./*"

for archive in "$ARCHIVE_NAME".*; do
    echo "Moving $archive to $DEST"
    mv "$archive" "$DEST/"
done

echo "Deleting temp directory"
rm -rf "$TMP/"

echo "Done!"