log

#!/bin/bash

DIR=/home/paper_server/logs

function usage() {
	echo "Usage: $(basename $0) [INDEX]" >&2;
}

function latest() {
	less "$@" "$DIR/latest.log"
}

HELP=0
if [[ $# -eq 0 ]]; then
	latest +F;
elif [[ $# -eq 1 ]]; then
	if [[ "$1" == --help ]]; then
		HELP=1
	elif [[ $1 -eq 0 ]]; then
		latest;
	elif [[ $1 -gt 0 ]]; then
		LINE=$1;
		FILE=$(ls "$DIR"/????-??-??-*.log.gz | tail -n $LINE | head -n 1);
		gzip -d "$FILE"
		FILE="${FILE%.gz}"
		less "$FILE"
		gzip "$FILE"
	else
		usage;
	fi;
else
	usage;
fi;

if [[ $HELP -eq 1 ]]; then
	usage;
	exec 1>&2;
	echo "";
	echo "INDEX is positive integer. Logs are indexed relatively to the latest one."
	echo "The latest log has index zero. The higher index the older log file."
fi;