Follow the number of files created

watch_count

#!/usr/bash

# To use: 
#      watch_count PATTERN [ARGS...]
# It will match the PATTERN and pass any remaining args to tqdm (that
# you need btw)
function watch_count {
    pattern=$1
    shift
    curr=0
    while true; do
        sleep 2

        prev=$curr
        curr=$(ls $pattern | wc -l)
        diff=$((curr-prev))

        if [ ! "$diff" -eq "0" ]; then
            for i in $(seq $prev $curr); do
                echo $i
            done
        fi
    done | tqdm $@ > /dev/null
}