warbo-utilities: 359ec1fe8ad820d3007a828fa24b701afc40a7de

     1: #!/usr/bin/env bash
     2: 
     3: # Taken from https://www.commandlinefu.com/commands/view/7938/countdown-clock
     4: 
     5: function usage() {
     6:   echo "Usage: countdown seconds <minutes> <hours>"
     7:   echo "Counts down the given seconds + minutes + hours then exits"
     8:   echo "For example, 3 hours 100 minutes would be 'countdown 0 100 3'"
     9: }
    10: 
    11: function numeric() {
    12:     tr -dc '0123456789.'
    13: }
    14: 
    15:  SECS=$(echo "$1" | numeric)
    16:  MINS=$(echo "$2" | numeric)
    17: HOURS=$(echo "$3" | numeric)
    18: 
    19: [[ -n "$HOURS" ]] || HOURS=0
    20: [[ -n  "$MINS" ]] ||  MINS=0
    21: [[ -n  "$SECS" ]] || {
    22:     usage 1>&2
    23:     exit 1
    24: }
    25: 
    26: MINS=$(( MINS + (HOURS * 60) ))
    27: SECS=$(( SECS + (MINS  * 60) ))
    28: echo "Sleeping for $SECS seconds (total)" 1>&2
    29: for (( i="$SECS"; i>=0; i-- ))
    30: do
    31:     echo -ne "\\r$(date -d"0+$i sec" +%H:%M:%S)"
    32:     sleep 1
    33: done
    34: echo