partitions.sh

#!/bin/bash
#set -x

partitions_between() {
        local from=$1
        local to=$2
        local offset_in_seconds=$3
        local fmt=$4

        current=$from
        while [ $current -lt $to ];
        do
                echo $(eval date -d "@$current" $fmt)
                current=$(expr $current + $offset_in_seconds)
        done
}

daily_partitions_between() {
        partitions_between $1 $2 86400 '+%Y/%m/%d'
}

hourly_partitions_between() {
        partitions_between $1 $2 3600 '+%Y/%m/%d/%H'
}

from=$(date -d "2019/12/18 10:00:00" +%s)
to=$(date -d "-1 hour" +%s)
for p in $(hourly_partitions_between $from $to);
do
        echo $p
done

daily_partitions_between $(date -d "3 days ago" +%s) $to