Radicale VS khal

Maybe https://radicale.org/ could fit the bill, CalDav for as a calendar server and CardDav for contacts.

I now use CalDAV Synchronizer to sync Outlook to my Radicale CalDAV / CardDAV "server" (a Raspberry Pi), with DAVx running on our phones.

Also look at Baikal, in addtion to Radicale.

Setup: 1. Install a CalDev server on my home server (running Debian Linux) using maybe Radicale (https://radicale.org/) 2. Use the Linux version of ProtonMail Bridge on this server to set up IMAP to connect to this CalDev server 3. Configure filters to automatically forward event invites sent to my ProtonMail address to my CalDev server, decrypted by Bridge 4. Configure my CalDev server to use ProtonMail to send event invites, when I create new events and add invitees 5. Add this CalDev server to Fantastical, using the app on iOS and MacOS as my primary calendar

Caldav is what you are looking for. The other comments mention implementations of them and i can vouch for radicale pretty barebones but does its job

We are thinking of writing a guide to setting up a small Radicale instance. This could be hosted on a raspberry pi, or small NAS or something.

After trying a number of alternatives, I'm strongly recommending radicale.

I used this as a guide, but made some changes to it: https://github.com/Kozea/Radicale/issues/779

I don't know what I'm doing wrong, I just tried to setup dumb jump, downloaded khal as example project and tried to use `gd` while I'm with the cursor on a method. It always is asking me for a TAGS file, but I don't have any, I mean this is dumb-jump.

I use https://github.com/pimutils/khal ...maybe it would work with WSL?... for calendar and markdown diary (have a script that pulls calendar items, tasks that are due from taskwarrior, and notes from yesterday's "tomorrow" section into each new day's journal/diary entry) via vimwiki.

It is absolutely possible. Use Lynx for web browsing, use TMUX for split screen, use BC for calculator, use KHAL for calendar and of course use RTV for Reddit. :-) Here is a great list of CLI apps: https://github.com/agarrharr/awesome-cli-apps Here are some of my favorites though: - https://github.com/GothenburgBitFactory/timewarrior - https://github.com/IonicaBizau/idea - https://github.com/jeffkowalski/geeknote - https://github.com/insanum/sncli - https://github.com/visit1985/mdp - https://github.com/astefanutti/decktape - https://github.com/insanum/gcalcli - https://github.com/pimutils/khal - https://dianne.skoll.ca/projects/remind/ - https://github.com/zquestz/s - https://github.com/yudai/gotty - https://github.com/axiros/terminal_markdown_viewer - https://github.com/chubin/wttr.in - https://github.com/schachmat/wego - https://github.com/tldr-pages/tldr

Apple iCal <-> vdirsyncer <-> khal <-> khalel

If that's a dead end, I'd look into CLI CALDAV clients that you could script around. Maybe something like khal? http://lostpackets.de/khal/

I tend to use khal in combination with vdirsyncer (which can sync a remote Google Calendar to local iCal files, and vice-versa). However I don't think it can handle all the meeting invite stuff you mention.

I like khal, which stores events in a directory of ics files. Not quite what you were asking for as it's not a single text file. The CLI for displaying, adding, and editing events is pretty nice though.

This looks very interesting. As the original author of khal (another terminal calendar) [1] I love some more competition in this space.

[1] https://github.com/pimutils/khal

I've been using vdirsyncer to keep CalDAV servers in sync. It works with basically everything. Works great with khal but I've always wanted a month or week view so I'm gonna check this out!