age

#!/bin/sh

#==============================================================================
# age
# File ID: 9b034192-0a68-11e2-98ae-fefdb24f8e10
# Author: Øyvind A. Holm <sunny@sunbase.org>
# License: GNU General Public License version 2 or later.
#==============================================================================

progname=age
VERSION=0.2.0

opt_help=0
opt_quiet=0
opt_seconds=0
opt_verbose=0
while test -n "$1"; do
	case "$1" in
	-h|--help) opt_help=1; shift ;;
	-q|--quiet) opt_quiet=$(($opt_quiet + 1)); shift ;;
	-s|--seconds) opt_seconds=1; shift ;;
	-v|--verbose) opt_verbose=$(($opt_verbose + 1)); shift ;;
	--version) echo $progname $VERSION; exit 0 ;;
	--) shift; break ;;
	*)
		if printf '%s\n' "$1" | grep -q ^-; then
			echo "$progname: $1: Unknown option" >&2
			exit 1
		else
			break
		fi
	break ;;
	esac
done
opt_verbose=$(($opt_verbose - $opt_quiet))

if test "$opt_help" = "1"; then
	test $opt_verbose -gt 0 && { echo; echo $progname $VERSION; }
	cat <<END

Print number of seconds since the UTC timestamp specified on the command 
line, use format "YYYY-MM-DD [HH:MM[:SS]]" or any other format 
understood by sqlite3. If two timestamps are specified, print number of 
seconds between them.

Usage: $progname [options] date1 [date2]

Options:

  -h, --help
    Show this help.
  -q, --quiet
    Be more quiet. Can be repeated to increase silence.
  -s, --seconds
    Display seconds instead of the default datefmt(1) output.
  -v, --verbose
    Increase level of verbosity. Can be repeated.
  --version
    Print version information.

END
	exit 0
fi

test -z "$1" && {
	echo $progname: Missing arguments >&2
	exit 1
}
begin=$1
end=now # Memento mori
test -n "$2" && end=$2

cat <<END | sqlite3 | (test "$opt_seconds" = "1" && cat || datefmt)
SELECT strftime('%s', datetime('$end'))
       - strftime('%s', datetime('$begin'));
END

# vim: set ts=8 sw=8 sts=8 noet fo+=w tw=79 fenc=UTF-8 :