5 files changed, 122 insertions, 0 deletions
diff --git a/vendor/gix/src/ext/mod.rs b/vendor/gix/src/ext/mod.rs
new file mode 100644
index 000000000..beb9007fa
--- /dev/null
+++ b/vendor/gix/src/ext/mod.rs
@@ -0,0 +1,9 @@
+pub use object_id::ObjectIdExt;
+pub use reference::ReferenceExt;
+pub use rev_spec::RevSpecExt;
+pub use tree::TreeIterExt;
+
+mod object_id;
+mod reference;
+mod rev_spec;
+mod tree;
diff --git a/vendor/gix/src/ext/object_id.rs b/vendor/gix/src/ext/object_id.rs
new file mode 100644
index 000000000..a4515022b
--- /dev/null
+++ b/vendor/gix/src/ext/object_id.rs
@@ -0,0 +1,34 @@
+use gix_hash::ObjectId;
+use gix_traverse::commit::{ancestors, Ancestors};
+
+pub trait Sealed {}
+
+pub type AncestorsIter<Find> = Ancestors<Find, fn(&gix_hash::oid) -> bool, ancestors::State>;
+
+/// An extension trait to add functionality to [`ObjectId`]s.
+pub trait ObjectIdExt: Sealed {
+    /// Create an iterator over the ancestry of the commits reachable from this id, which must be a commit.
+    fn ancestors<Find, E>(self, find: Find) -> AncestorsIter<Find>
+    where
+        Find: for<'a> FnMut(&gix_hash::oid, &'a mut Vec<u8>) -> Result<gix_object::CommitRefIter<'a>, E>,
+        E: std::error::Error + Send + Sync + 'static;
+
+    /// Infuse this object id `repo` access.
+    fn attach(self, repo: &crate::Repository) -> crate::Id<'_>;
+}
+
+impl Sealed for ObjectId {}
+
+impl ObjectIdExt for ObjectId {
+    fn ancestors<Find, E>(self, find: Find) -> AncestorsIter<Find>
+    where
+        Find: for<'a> FnMut(&gix_hash::oid, &'a mut Vec<u8>) -> Result<gix_object::CommitRefIter<'a>, E>,
+        E: std::error::Error + Send + Sync + 'static,
+    {
+        Ancestors::new(Some(self), ancestors::State::default(), find)
+    }
+
+    fn attach(self, repo: &crate::Repository) -> crate::Id<'_> {
+        crate::Id::from_id(self, repo)
+    }
+}
diff --git a/vendor/gix/src/ext/reference.rs b/vendor/gix/src/ext/reference.rs
new file mode 100644
index 000000000..57e4e4fe7
--- /dev/null
+++ b/vendor/gix/src/ext/reference.rs
@@ -0,0 +1,15 @@
+pub trait Sealed {}
+
+impl Sealed for gix_ref::Reference {}
+
+/// Extensions for [references][gix_ref::Reference].
+pub trait ReferenceExt {
+    /// Attach [`Repository`][crate::Repository] to the given reference. It can be detached later with [`detach()]`.
+    fn attach(self, repo: &crate::Repository) -> crate::Reference<'_>;
+}
+
+impl ReferenceExt for gix_ref::Reference {
+    fn attach(self, repo: &crate::Repository) -> crate::Reference<'_> {
+        crate::Reference::from_ref(self, repo)
+    }
+}
diff --git a/vendor/gix/src/ext/rev_spec.rs b/vendor/gix/src/ext/rev_spec.rs
new file mode 100644
index 000000000..ed7dc0460
--- /dev/null
+++ b/vendor/gix/src/ext/rev_spec.rs
@@ -0,0 +1,20 @@
+pub trait Sealed {}
+
+impl Sealed for gix_ref::Reference {}
+
+/// Extensions for [revision specifications][gix_revision::Spec].
+pub trait RevSpecExt {
+    /// Attach [`Repository`][crate::Repository] to the given rev-spec.
+    fn attach(self, repo: &crate::Repository) -> crate::revision::Spec<'_>;
+}
+
+impl RevSpecExt for gix_revision::Spec {
+    fn attach(self, repo: &crate::Repository) -> crate::revision::Spec<'_> {
+        crate::revision::Spec {
+            inner: self,
+            first_ref: None,
+            second_ref: None,
+            repo,
+        }
+    }
+}
diff --git a/vendor/gix/src/ext/tree.rs b/vendor/gix/src/ext/tree.rs
new file mode 100644
index 000000000..09220fc40
--- /dev/null
+++ b/vendor/gix/src/ext/tree.rs
@@ -0,0 +1,44 @@
+use std::borrow::BorrowMut;
+
+use gix_hash::oid;
+use gix_object::TreeRefIter;
+use gix_traverse::tree::breadthfirst;
+
+pub trait Sealed {}
+
+/// An extension trait for tree iterators
+pub trait TreeIterExt: Sealed {
+    /// Traverse this tree with `state` being provided to potentially reuse allocations, and `find` being a function to lookup trees
+    /// and turn them into iterators.
+    ///
+    /// The `delegate` implements a way to store details about the traversal to allow paying only for what's actually used.
+    /// Since it is expected to store the operation result, _unit_ is returned.
+    fn traverse<StateMut, Find, V>(
+        &self,
+        state: StateMut,
+        find: Find,
+        delegate: &mut V,
+    ) -> Result<(), breadthfirst::Error>
+    where
+        Find: for<'a> FnMut(&oid, &'a mut Vec<u8>) -> Option<TreeRefIter<'a>>,
+        StateMut: BorrowMut<breadthfirst::State>,
+        V: gix_traverse::tree::Visit;
+}
+
+impl<'d> Sealed for TreeRefIter<'d> {}
+
+impl<'d> TreeIterExt for TreeRefIter<'d> {
+    fn traverse<StateMut, Find, V>(
+        &self,
+        state: StateMut,
+        find: Find,
+        delegate: &mut V,
+    ) -> Result<(), breadthfirst::Error>
+    where
+        Find: for<'a> FnMut(&oid, &'a mut Vec<u8>) -> Option<TreeRefIter<'a>>,
+        StateMut: BorrowMut<breadthfirst::State>,
+        V: gix_traverse::tree::Visit,
+    {
+        breadthfirst(self.clone(), state, find, delegate)
+    }
+}