download a folder on github given its URL

github-folder-dl.sh

#!/usr/bin/env bash

set -e

URL="$*"
START=$(echo "$URL" | sed 's%/tree/main/%\n%g' | head -n1)
END=$(echo "$URL" | sed 's%/tree/main/%\n%g' | tail -n1)
FOLDER=$(echo "$END" | rev | cut -d'/' -f1 | rev)
REPO=$(echo "$START" | cut -d'/' -f5)
CHECKOUT="${REPO}_$(uuidgen)"

function get_folder {
    git clone -n --depth=1 --filter=tree:0 "$START" "$CHECKOUT" &>/dev/null
    cd "$CHECKOUT"
    git sparse-checkout set --no-cone "$END" &>/dev/null
    git checkout &>/dev/null
    mv "$END" ../"${FOLDER}@$(date '+%Y-%m-%dT%H:%M:%S')"
    cd ..
    rm -rf "$CHECKOUT"
    return $?
}

function await_last {
    pid=$!
    while ps -a | awk '{print $1}' | grep -q "${pid}"; do
        for s in / - \\ \|; do
            printf "\r%s" "$s"
            sleep .1
        done
    done
    wait ${pid}
    ret=$?
    exit ${ret}
}

get_folder &
await_last