liboxen 0.50.6

Oxen is a fast, unstructured data version control, to help version large machine learning datasets written in Rust.
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//! Revisions can either be commits by id or head commits on branches by name

use crate::error::OxenError;
use crate::model::{Commit, LocalRepository};
use crate::repositories;

/// Get a commit object from a commit id or branch name
/// Returns Ok(None) if the revision does not exist
pub fn get(repo: &LocalRepository, revision: impl AsRef<str>) -> Result<Option<Commit>, OxenError> {
    let revision = revision.as_ref();
    if revision == "HEAD" {
        let commit = repositories::commits::head_commit(repo)?;
        return Ok(Some(commit));
    }

    let commit_id = repositories::branches::get_commit_id(repo, revision)?
        .unwrap_or_else(|| revision.to_string());
    let commit = repositories::commits::get_by_id(repo, &commit_id)?;
    Ok(commit)
}