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What do you prefer for a self hosted calendar?
(leaf.dance)
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this post was submitted on 01 Sep 2023
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I'm going to pass for the crazy person around, but so be it : cron.
Cron can be easily configured to send mails (
MAILTOvariable when using standard cron), providedsendmailis available on the system. If a command called by cron outputs anything, it will send a mail with the content, which is useful by itself to warn when something goes wrong with a cron task, but also allows to do things like this:It's really easy to get used to the syntax, it's just going from more precise to less precise, so it's "minute, hour, day, month, *". The last one can usually be ignored (it's the day of the week, I must have used it twice in my life). So here, "0 9 28 9", you read it backward and it gives : September, 28th, 9:00. Piece of cake when you get a bit of practice. And cron is everywhere, so no need to install anything. Although, since I run it on my laptop, I use fcron, which has a nice feature to run ASAP tasks which should have ran if the computer was not shut down. This way, I never miss an alert.
I use it for recurring notes (like birthday, paperwork, house cleaning tasks, holidays, etc), but also as reminders of specific dates when I expect a delivery, have a meeting, etc. For the most important messages, I make it use a script that will make a destkop notification (with notify-send) and have a voice read the message (with mimic). And of course, I also use it to actually launch programs. :)
Sounds good for setting the events up and getting notifications part. A good calender would also let you see the upcoming events in week, month at a glance. Cron entries are non sorted lists. Is there a cron visualizer like they have visualizers for logs?
I organize my crontab by having group of tasks (the programs, the holidays, the housecleaning, etc). And of those groups, the events (the non recurring tasks) come last. So I just list the crontab (
crontab -l) and the list of things to come print to the screen, that block being at the end of the file. It's hard to do better than a text file to list things. :)I don't know if there is a program that lists like "what is coming this month" if you really want to filter out the rest, but it should be easy enough to write, given the format of cron rules:
crontab -l: list the crontabgrep '*': keeps only rules (removing blank lines and comments)awk […]: print the whole line ($0), prepend by the 4th field (the month), the 3rd (the day), the 2nd (the hour) and the 1st (the minutes)sort -n: sort everything numerically, so that all tasks are now in their execution date order (I made awk seperate the fields with a,character so it keeps sorting numerically past the first number)date '+%-m: prints the current month, not zero padded (thanks to the '-')grep -E '^date': keep only lines which starts with the current month numberYou put that in a script (like
~/bin/upcoming_events) and you're done. And then, you can call it from cron every monday get what's coming next mailed to you. :)This could but refined further to display dates in a more friendly format. But as usual, Unix is your friend. :)