#!/bin/sh
#
# j - journal with single-line entries with timestamps
#
# SPDX-FileCopyrightText: 2023 Daniel Kalak
# SPDX-License-Identifier: GPL-3.0-or-later
#
# This program is inspired by the article "Simple Tools" by James Card,
# available at <gemini://jdcard.com/SimpleTools.gmi> (among others). See
# <gemini://dkalak.de/txt/journal.txt> for more inforamtion.

journal="${JOURNAL:?}"

[ "${line:="$*"}" ] || IFS= read -r line

[ "$line" ] && printf '%s %s\n' "$(date -Iseconds)" "$line" >> "$journal"

tail -n5 "$journal"