What I would really like to see is a some kind of `when` clone with
cron-like syntax written in C.
I have just written very simple prototype of it in rc:
#!/usr/bin/env rc
date=`{date}
month=$date(2)
day=$date(3)
while (line=`{read}) {
if ({~ $line(1) '*' || ~ $line(1) $day} &&
{~ $line(2) '*' || ~ $line(2) $month})
echo $line(3-)
}
Syntax looks like this:
# DAY MONTH TEXT
15 Aug ok
16 Aug not ok
* * always ok
When started with
when <~/lib/calendar
it outputs
ok
always ok
It will output "not ok" tomorrow.
I don't think this should be written in shell scripting language: it
is not too easy to calculate what date it will be tomorrow without
libc and it should be very fast. Also there should be more fields for
hours, minutes, year and day of week, items should be sorted by time
and there should be some items with dates that are in the feature.
I store my TODO items in file named "TODO" so no need to support for
them in personal calendar program.
- - -
Also just found "calendar" program in plan9port:
http://plan9.bell-labs.com/magic/man2html/1/calendar
I will try it, probably it is even better than my idea.
