alexjg / autosurgeon

autosurgeon

Autosurgeon is a Rust library for working with data in automerge documents. See the documentation for a detailed guide.

Quickstart

autosurgeon requires rust 1.65 or newer.

Add autosurgeon to your dependencies with cargo add

cargo add autosurgeon

Then we can define a data model which derives Reconcile and Hydrate and start reading and writing from automerge documents

use autosurgeon::{Reconcile, Hydrate, hydrate, reconcile};

// A simple contact document

#[derive(Debug, Clone, Reconcile, Hydrate, PartialEq)]
struct Contact {
    name: String,
    address: Address,
}

#[derive(Debug, Clone, Reconcile, Hydrate, PartialEq)]
struct Address {
   line_one: String,
   line_two: Option<String>,
   city: String,
   postcode: String,
}

let mut contact = Contact {
     name: "Sherlock Holmes".to_string(),
     address: Address{
         line_one: "221B Baker St".to_string(),
         line_two: None,
         city: "London".to_string(),
         postcode: "NW1 6XE".to_string(),
     },
};

// Put data into a document
let mut doc = automerge::AutoCommit::new();
reconcile(&mut doc, &contact).unwrap();

// Get data out of a document
let contact2: Contact = hydrate(&doc).unwrap();
assert_eq!(contact, contact2);

// Fork and make changes
let mut doc2 = doc.fork().with_actor(automerge::ActorId::random());
let mut contact2: Contact = hydrate(&doc2).unwrap();
contact2.name = "Dangermouse".to_string();
reconcile(&mut doc2, &contact2).unwrap();

// Concurrently on doc1
contact.address.line_one = "221C Baker St".to_string();
reconcile(&mut doc, &contact).unwrap();

// Now merge the documents
// Reconciled changes will merge in somewhat sensible ways
doc.merge(&mut doc2).unwrap();

let merged: Contact = hydrate(&doc).unwrap();
assert_eq!(merged, Contact {
    name: "Dangermouse".to_string(), // This was updated in the first doc
    address: Address {
          line_one: "221C Baker St".to_string(), // This was concurrently updated in doc2
          line_two: None,
          city: "London".to_string(),
          postcode: "NW1 6XE".to_string(),
    }
})