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rc/sh/wipe

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#!/usr/bin/env sh
# YES_ZSH
# YES_BASH
# YES_DASH
wipe() { ### @-
### clear the screen and its scrollback, then print a high-contrast horizontal line.
### using this, you'll know with absolute certainty that you're looking at the top of your history,
### and that your terminal's scrollback didn't cap out and eat text.
###
### **TODO:** rename because wipe(1) already exists.
[ $# -le 0 ] || { printf "%s\n" "$0: too many arguments" >&2; return 1; }
clear
clear # twice because mintty is weird
echo $'\033[30m\033[107m' | tr -d '$'
if [ -n "${ZSH_VERSION:-}" ]; then
printf '*%.0s' {1..$COLUMNS}
else
tput cols | awk '{for(i=0;i<$0;i++)printf "*"}'
fi
echo $'\033[0m\n' | tr -d '$'
}
[ "${SOURCING:-0}" -gt 0 ] || wipe "$@"