gdate_best_date.sh

gdate_best_date.sh

#!/usr/bin/env bash 
# 
# usage: dot-source to export to the current shell context
#   . ./gdate_best_date.sh
# 
# remove the override with `unset -f`:
#   unset -f date
# 

if ! ( date --version 2>&1 | grep GNU > /dev/null ); then
    function date() {
        gdate "$@"
    }
    if ! ( date --version 2>&1 | grep GNU > /dev/null ); then
        echo "GNU Coreutils \`date\` (\`gdate\`) was not found and is required. Exiting." 1>&2
        exit 1
    fi
fi

HT

• https://askubuntu.com/questions/98782/how-to-run-an-alias-in-a-shell-script/98791#98791
• https://superuser.com/questions/154332/how-do-i-unset-or-get-rid-of-a-bash-function