rust_core example with SFTP?

[n8henrie]

Hi all,

I'm a fairly satisfied restic user but I prefer rust to go and have kept my eye on rustic for a while.

One of my primary interests would be using the rustic_core library to create my own backup binary that would be self-contained (and ideally completely independent of its environment or any external configuration files), which I could then codesign and confidently allow to run with unrestricted permissions.

My current restic repo is accessed over sftp. I started tinkering yesterday and could not figure out how to run a Hello World (just listing snapshots) to SFTP without requiring an external configuration file (something I'm hoping to avoid).

Is something like this possible? Does anyone have any examples?

Many thanks for your time.

[aawsome]

For examples about how to use rustic_core, see https://github.com/rustic-rs/rustic_core/tree/main/examples.
The idea is to create a Repository instance from RepositoryOptions and RepositoryBackends built from BackendOptions. For sftp, this should be like:

let backends = BackendOptions::default().repository("opendal:sftp").options(stfp_opts).to_backends();

and sftp_opts can be set e.g. by creating a BTreeMap using the parameter from https://nightlies.apache.org/opendal/opendal-docs-release-v0.46.0/docs/services/sftp/ .
(Note that for sftp there are some limitations by opendal.)

Then, use the methods Repository provides, e.g. open() and then get_all_snapshots().

[n8henrie]

Sorry it's taken so long to test this out -- I ran into #1394 which confused me mightily for a bit, but once I generated a new key got the below PoC working:

use rustic_backend::BackendOptions;
use rustic_core::{Credentials, Repository, RepositoryOptions};
use simplelog::{Config, LevelFilter, SimpleLogger};
use std::{collections::BTreeMap, error::Error};

fn main() -> Result<(), Box<dyn Error>> {
    let _ = SimpleLogger::init(LevelFilter::Info, Config::default());

    let sftp_opts: BTreeMap<_, _> = [
        ("endpoint", "ssh://1.2.3.4:54321"),
        ("key", "/abspath/to/restic/privkey"),
        ("root", "relpath/from/~restic/to/repo"),
        ("user", "restic"),
    ]
    .into_iter()
    .map(|(a, b)| (a.to_string(), b.to_string()))
    .collect();
    let backends = BackendOptions::default()
        .repository("opendal:sftp")
        .options(sftp_opts)
        .to_backends()?;

    let repo_opts = RepositoryOptions::default();
    let credentials = Credentials::password(r#"SUPERSECRET"#);
    let repo = Repository::new(&repo_opts, &backends)?.open(&credentials)?;
    dbg!(&repo);

    dbg!(repo.get_all_snapshots()?.iter().next());
    Ok(())
}

Beautiful!

[aawsome]

BTW, #1394 should be fixed in rustic_core in main - will be in the next release.