I/O Vdir

Set of I/O-free Rust coroutines to manage Vdir filesystems, based on io-fs.

This library allows you to manage vCard files (.vcf) and iCal (.ics) files inside Vdir filesystems using an I/O-agnostic approach, based on 3 concepts:

Coroutine

A coroutine is an I/O-free, resumable and composable state machine that emits I/O requests. A coroutine is considered terminated when it does not emit I/O requests anymore.

See available coroutines at ./src/coroutines.

Runtime

A runtime contains all the I/O logic, and is responsible for processing I/O requests emitted by coroutines.

See available runtimes at io-fs.

Loop

The loop is the glue between coroutines and runtimes. It makes the coroutine progress while allowing runtime to process I/O.

Examples

List collections synchronously

use std::{path::PathBuf};

use io_fs::runtimes::std::handle;
use io_vdir::coroutines::list_collections::{ListCollections, ListCollectionsResult};

let mut arg = None;
let mut coroutine = ListCollections::new("/path/to/collections");

let collections = loop {
    match coroutine.resume(arg) {
        ListCollectionsResult::Ok(collections) => break collections,
        ListCollectionsResult::Err(err) => panic!("{err}"),
        ListCollectionsResult::Io(io) => arg = Some(handle(io).unwrap()),
    }
};

println!("Collection paths:");

for collection in collections {
    println!(" - {}", collection.path.display());
}

See complete examples at ./examples.

More examples

Have a look at projects built on the top of this library:

• io-addressbook: Set of I/O-free Rust coroutines to manage contacts.
• io-calendar: Set of I/O-free Rust coroutines to manage calendars.
• Cardamum: CLI to manage contacts.
• Calendula: CLI to manage calendars.

License

This project is licensed under either of:

• MIT license
• Apache License, Version 2.0

at your option.

Sponsoring

Special thanks to the NLnet foundation and the European Commission that helped the project to receive financial support from various programs:

• NGI Assure in 2022
• NGI Zero Entrust in 2023
• NGI Zero Core in 2024 (still ongoing)

If you appreciate the project, feel free to donate using one of the following providers: