refactor (#427)

git-revision/Cargo.toml

@@ -20,6 +20,7 @@ serde1 = [ "serde", "git-hash/serde1", "git-object/serde1" ]
 git-hash = { version = "^0.9.4", path = "../git-hash" }
 git-object = { version = "^0.19.0", path = "../git-object" }
 
+bstr = { version = "0.2.13", default-features = false, features = ["std"]}
 hash_hasher = "2.0.3"
 thiserror = "1.0.26"
 serde = { version = "1.0.114", optional = true, default-features = false, features = ["derive"] }

git-revision/src/describe.rs

@@ -3,7 +3,7 @@ use std::{
     fmt::{Display, Formatter},
 };
 
-use git_object::bstr::BStr;
+use bstr::BStr;
 
 /// The positive result produced by [describe()][function::describe()].
 #[derive(Debug, Clone)]
@@ -150,8 +150,9 @@ pub(crate) mod function {
         iter::FromIterator,
     };
 
+    use bstr::BStr;
     use git_hash::oid;
-    use git_object::{bstr::BStr, CommitRefIter};
+    use git_object::CommitRefIter;
     use hash_hasher::HashBuildHasher;
 
     use super::{Error, Outcome};

git-revision/src/spec.rs

@@ -18,7 +18,7 @@ impl Default for Kind {
 
 pub mod parse {
     #![allow(missing_docs)]
-    use git_object::bstr::BStr;
+    use bstr::BStr;
 
     #[derive(Debug, thiserror::Error)]
     pub enum Error {
@@ -49,11 +49,9 @@ pub mod parse {
 
     pub(crate) mod function {
         use crate::spec::parse::{Delegate, Error};
-        use git_object::bstr::BStr;
+        use bstr::BStr;
 
         pub fn parse(input: &BStr, delegate: &mut impl Delegate) -> Result<(), Error> {
-            // TODO: don't hardcode these cases, see how git does it. This remains
-            //       just an example.
             if input == "@" || input == "HEAD" {
                 return delegate.resolve_ref("HEAD".into()).ok_or(Error::Delegate);
             }