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|
//!
use crate::{
object,
object::{peel, Kind},
Object, Tree,
};
///
pub mod to_kind {
mod error {
use crate::object;
/// The error returned by [`Object::peel_to_kind()`][crate::Object::peel_to_kind()].
#[derive(Debug, thiserror::Error)]
#[allow(missing_docs)]
pub enum Error {
#[error(transparent)]
FindExistingObject(#[from] object::find::existing::Error),
#[error("Last encountered object {oid} was {actual} while trying to peel to {expected}")]
NotFound {
oid: gix_hash::Prefix,
actual: object::Kind,
expected: object::Kind,
},
}
}
pub use error::Error;
}
impl<'repo> Object<'repo> {
// TODO: tests
/// Follow tags to their target and commits to trees until the given `kind` of object is encountered.
///
/// Note that this object doesn't necessarily have to be the end of the chain.
/// Typical values are [`Kind::Commit`] or [`Kind::Tree`].
pub fn peel_to_kind(mut self, kind: Kind) -> Result<Self, peel::to_kind::Error> {
loop {
match self.kind {
our_kind if kind == our_kind => {
return Ok(self);
}
Kind::Commit => {
let tree_id = self
.try_to_commit_ref_iter()
.expect("commit")
.tree_id()
.expect("valid commit");
let repo = self.repo;
drop(self);
self = repo.find_object(tree_id)?;
}
Kind::Tag => {
let target_id = self.to_tag_ref_iter().target_id().expect("valid tag");
let repo = self.repo;
drop(self);
self = repo.find_object(target_id)?;
}
Kind::Tree | Kind::Blob => {
return Err(peel::to_kind::Error::NotFound {
oid: self.id().shorten().unwrap_or_else(|_| self.id.into()),
actual: self.kind,
expected: kind,
})
}
}
}
}
/// Peel this object into a tree and return it, if this is possible.
pub fn peel_to_tree(self) -> Result<Tree<'repo>, peel::to_kind::Error> {
Ok(self.peel_to_kind(gix_object::Kind::Tree)?.into_tree())
}
// TODO: tests
/// Follow all tag object targets until a commit, tree or blob is reached.
///
/// Note that this method is different from [`peel_to_kind(…)`][Object::peel_to_kind()] as it won't
/// peel commits to their tree, but handles tags only.
pub fn peel_tags_to_end(mut self) -> Result<Self, object::find::existing::Error> {
loop {
match self.kind {
Kind::Commit | Kind::Tree | Kind::Blob => break Ok(self),
Kind::Tag => {
let target_id = self.to_tag_ref_iter().target_id().expect("valid tag");
let repo = self.repo;
drop(self);
self = repo.find_object(target_id)?;
}
}
}
}
}
|
