#!/bin/bash
-
# Desc: Template to display date
yell() { echo "$0: $*" >&2; } #o Yell, Die, Try Three-Fingered Claw technique
dateShort(){
# Desc: Date without separators (YYYYmmdd)
# Usage: dateShort ([str date])
- # Version: 1.1.0
+ # Version: 1.1.2
# Input: arg1: 'date'-parsable timestamp string (optional)
# Output: stdout: date (ISO-8601, no separators)
- # Depends: yell
- local TIME_CURRENT DATE_CURRENT_SHORT
+ # Depends: bash 5.0.3, date 8.30, yell()
+ local argTime timeCurrent timeInput dateCurrentShort
argTime="$1";
# Get Current Time
- TIME_CURRENT="$(date --iso-8601=seconds)" ; # Produce `date`-parsable current timestamp with resolution of 1 second.
+ timeCurrent="$(date --iso-8601=seconds)" ; # Produce `date`-parsable current timestamp with resolution of 1 second.
# Decide to parse current or supplied date
## Check if time argument empty
if [[ -z "$argTime" ]]; then
## T: Time argument empty, use current time
- TIME_INPUT="$TIME_CURRENT";
+ timeInput="$timeCurrent";
else
## F: Time argument exists, validate time
if date --date="$argTime" 1>/dev/null 2>&1; then
### T: Time argument is valid; use it
- TIME_INPUT="$argTime";
+ timeInput="$argTime";
else
### F: Time argument not valid; exit
yell "ERROR:Invalid time argument supplied. Exiting."; exit 1;
- fi
- fi
+ fi;
+ fi;
# Construct and deliver separator-les date string
- DATE_CURRENT_SHORT="$(date -d "$TIME_INPUT" +%Y%m%d)"; # Produce separator-less current date with resolution 1 day.
- echo "$DATE_CURRENT_SHORT";
+ dateCurrentShort="$(date -d "$timeInput" +%Y%m%d)"; # Produce separator-less current date with resolution 1 day.
+ echo "$dateCurrentShort";
} # Get YYYYmmdd
#==BEGIN sample code==