1 files changed, 42 insertions, 0 deletions
diff --git a/vendor/gix/src/repository/revision.rs b/vendor/gix/src/repository/revision.rs
new file mode 100644
index 000000000..3018c2be8
--- /dev/null
+++ b/vendor/gix/src/repository/revision.rs
@@ -0,0 +1,42 @@
+use crate::{bstr::BStr, revision, Id};
+
+/// Methods for resolving revisions by spec or working with the commit graph.
+impl crate::Repository {
+    /// Parse a revision specification and turn it into the object(s) it describes, similar to `git rev-parse`.
+    ///
+    /// # Deviation
+    ///
+    /// - `@` actually stands for `HEAD`, whereas `git` resolves it to the object pointed to by `HEAD` without making the
+    ///   `HEAD` ref available for lookups.
+    pub fn rev_parse<'a>(&self, spec: impl Into<&'a BStr>) -> Result<revision::Spec<'_>, revision::spec::parse::Error> {
+        revision::Spec::from_bstr(
+            spec,
+            self,
+            revision::spec::parse::Options {
+                object_kind_hint: self.config.object_kind_hint,
+                ..Default::default()
+            },
+        )
+    }
+
+    /// Parse a revision specification and return single object id as represented by this instance.
+    pub fn rev_parse_single<'repo, 'a>(
+        &'repo self,
+        spec: impl Into<&'a BStr>,
+    ) -> Result<Id<'repo>, revision::spec::parse::single::Error> {
+        let spec = spec.into();
+        self.rev_parse(spec)?
+            .single()
+            .ok_or(revision::spec::parse::single::Error::RangedRev { spec: spec.into() })
+    }
+
+    /// Create the baseline for a revision walk by initializing it with the `tips` to start iterating on.
+    ///
+    /// It can be configured further before starting the actual walk.
+    pub fn rev_walk(
+        &self,
+        tips: impl IntoIterator<Item = impl Into<gix_hash::ObjectId>>,
+    ) -> revision::walk::Platform<'_> {
+        revision::walk::Platform::new(tips, self)
+    }
+}