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use std::{cmp::Ordering, path::PathBuf};
use git2::{BranchType, Repository};
use tracing::error;
pub trait Sorter {
#[allow(clippy::ptr_arg)]
fn compare(a: &PathBuf, b: &PathBuf) -> Ordering;
fn sort(vec: &mut Vec<PathBuf>) {
vec.sort_unstable_by(Self::compare);
}
}
pub struct GitSorter;
impl GitSorter {
fn get_commit(path: &PathBuf) -> Result<i64, git2::Error> {
let repo = Repository::open(path)?;
let mut branches = repo.branches(Some(BranchType::Local))?;
branches.try_fold(0, |latest, branch| {
let branch = branch?.0;
let name = branch
.name()?
.ok_or_else(|| git2::Error::from_str("Failed to find branch"))?;
repo.revparse_single(name)?
.peel_to_commit()
.map(|c| c.time().seconds().max(latest))
})
}
}
impl Sorter for GitSorter {
fn compare(path_a: &PathBuf, path_b: &PathBuf) -> Ordering {
let commit_a = Self::get_commit(path_a);
let commit_b = Self::get_commit(path_b);
match (commit_a, commit_b) {
(Ok(a), Ok(b)) => a.cmp(&b),
(Ok(_), Err(error_b)) => {
error!(?path_b, ?error_b, "Error while comparing git repos");
Ordering::Less
}
(Err(error_a), Ok(_)) => {
error!(?path_a, ?error_a, "Error while comparing git repos");
Ordering::Greater
}
(Err(error_a), Err(error_b)) => {
error!(
?path_a,
?error_a,
?path_b,
?error_b,
"Error while comparing git repos"
);
Ordering::Equal
}
}
}
}
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