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use crate::{data, find};
pub trait Find {
type Error: std::error::Error + 'static;
fn try_find<'a>(
&self,
id: impl AsRef<git_hash::oid>,
buffer: &'a mut Vec<u8>,
pack_cache: &mut impl crate::cache::DecodeEntry,
) -> Result<Option<data::Object<'a>>, Self::Error>;
fn location_by_oid(&self, id: impl AsRef<git_hash::oid>, buf: &mut Vec<u8>) -> Option<crate::bundle::Location>;
fn bundle_by_pack_id(&self, pack_id: u32) -> Option<&crate::Bundle>;
fn entry_by_location(&self, location: &crate::bundle::Location) -> Option<find::Entry<'_>>;
}
mod ext {
use git_object::{BlobRef, CommitRef, CommitRefIter, Kind, ObjectRef, TagRef, TagRefIter, TreeRef, TreeRefIter};
use crate::{data, find};
macro_rules! make_obj_lookup {
($method:ident, $object_variant:path, $object_kind:path, $object_type:ty) => {
fn $method<'a>(
&self,
id: impl AsRef<git_hash::oid>,
buffer: &'a mut Vec<u8>,
pack_cache: &mut impl crate::cache::DecodeEntry,
) -> Result<$object_type, find::existing_object::Error<Self::Error>> {
let id = id.as_ref();
self.try_find(id, buffer, pack_cache)
.map_err(find::existing_object::Error::Find)?
.ok_or_else(|| find::existing_object::Error::NotFound {
oid: id.as_ref().to_owned(),
})
.and_then(|o| o.decode().map_err(find::existing_object::Error::Decode))
.and_then(|o| match o {
$object_variant(o) => return Ok(o),
_other => Err(find::existing_object::Error::ObjectKind {
expected: $object_kind,
}),
})
}
};
}
macro_rules! make_iter_lookup {
($method:ident, $object_kind:path, $object_type:ty, $into_iter:tt) => {
fn $method<'a>(
&self,
id: impl AsRef<git_hash::oid>,
buffer: &'a mut Vec<u8>,
pack_cache: &mut impl crate::cache::DecodeEntry,
) -> Result<$object_type, find::existing_iter::Error<Self::Error>> {
let id = id.as_ref();
self.try_find(id, buffer, pack_cache)
.map_err(find::existing_iter::Error::Find)?
.ok_or_else(|| find::existing_iter::Error::NotFound {
oid: id.as_ref().to_owned(),
})
.and_then(|o| {
o.$into_iter()
.ok_or_else(|| find::existing_iter::Error::ObjectKind {
expected: $object_kind,
})
})
}
};
}
pub trait FindExt: super::Find {
fn find<'a>(
&self,
id: impl AsRef<git_hash::oid>,
buffer: &'a mut Vec<u8>,
pack_cache: &mut impl crate::cache::DecodeEntry,
) -> Result<data::Object<'a>, find::existing::Error<Self::Error>> {
let id = id.as_ref();
self.try_find(id, buffer, pack_cache)
.map_err(find::existing::Error::Find)?
.ok_or_else(|| find::existing::Error::NotFound {
oid: id.as_ref().to_owned(),
})
}
make_obj_lookup!(find_commit, ObjectRef::Commit, Kind::Commit, CommitRef<'a>);
make_obj_lookup!(find_tree, ObjectRef::Tree, Kind::Tree, TreeRef<'a>);
make_obj_lookup!(find_tag, ObjectRef::Tag, Kind::Tag, TagRef<'a>);
make_obj_lookup!(find_blob, ObjectRef::Blob, Kind::Blob, BlobRef<'a>);
make_iter_lookup!(find_commit_iter, Kind::Blob, CommitRefIter<'a>, try_into_commit_iter);
make_iter_lookup!(find_tree_iter, Kind::Tree, TreeRefIter<'a>, try_into_tree_iter);
make_iter_lookup!(find_tag_iter, Kind::Tag, TagRefIter<'a>, try_into_tag_iter);
}
impl<T: super::Find> FindExt for T {}
}
pub use ext::FindExt;
mod find_impls {
use std::ops::Deref;
use git_hash::oid;
use crate::{bundle::Location, data::Object, find, Bundle};
impl<T> super::Find for std::sync::Arc<T>
where
T: super::Find,
{
type Error = T::Error;
fn try_find<'a>(
&self,
id: impl AsRef<oid>,
buffer: &'a mut Vec<u8>,
pack_cache: &mut impl crate::cache::DecodeEntry,
) -> Result<Option<Object<'a>>, Self::Error> {
self.deref().try_find(id, buffer, pack_cache)
}
fn location_by_oid(&self, id: impl AsRef<oid>, buf: &mut Vec<u8>) -> Option<Location> {
self.deref().location_by_oid(id, buf)
}
fn bundle_by_pack_id(&self, pack_id: u32) -> Option<&Bundle> {
self.deref().bundle_by_pack_id(pack_id)
}
fn entry_by_location(&self, object: &crate::bundle::Location) -> Option<find::Entry<'_>> {
self.deref().entry_by_location(object)
}
}
impl<T> super::Find for Box<T>
where
T: super::Find,
{
type Error = T::Error;
fn try_find<'a>(
&self,
id: impl AsRef<oid>,
buffer: &'a mut Vec<u8>,
pack_cache: &mut impl crate::cache::DecodeEntry,
) -> Result<Option<Object<'a>>, Self::Error> {
self.deref().try_find(id, buffer, pack_cache)
}
fn location_by_oid(&self, id: impl AsRef<oid>, buf: &mut Vec<u8>) -> Option<Location> {
self.deref().location_by_oid(id, buf)
}
fn bundle_by_pack_id(&self, pack_id: u32) -> Option<&Bundle> {
self.deref().bundle_by_pack_id(pack_id)
}
fn entry_by_location(&self, location: &crate::bundle::Location) -> Option<find::Entry<'_>> {
self.deref().entry_by_location(location)
}
}
}