fix: make rev_walk available even without the revision feature.

Technically it doesn't depend on it.

Author: Byron

gix/src/repository/mod.rs

@@ -67,7 +67,6 @@ mod object;
 mod pathspec;
 mod reference;
 mod remote;
-#[cfg(feature = "revision")]
 mod revision;
 mod shallow;
 mod state;

gix/src/repository/revision.rs

@@ -1,4 +1,6 @@
-use crate::{bstr::BStr, revision, Id};
+use crate::revision;
+#[cfg(feature = "revision")]
+use crate::{bstr::BStr, Id};
 
 /// Methods for resolving revisions by spec or working with the commit graph.
 impl crate::Repository {
@@ -9,6 +11,7 @@ impl crate::Repository {
     /// - `@` actually stands for `HEAD`, whereas `git` resolves it to the object pointed to by `HEAD` without making the
     ///   `HEAD` ref available for lookups.
     #[doc(alias = "revparse", alias = "git2")]
+    #[cfg(feature = "revision")]
     pub fn rev_parse<'a>(&self, spec: impl Into<&'a BStr>) -> Result<revision::Spec<'_>, revision::spec::parse::Error> {
         revision::Spec::from_bstr(
             spec,
@@ -22,6 +25,7 @@ impl crate::Repository {
 
     /// Parse a revision specification and return single object id as represented by this instance.
     #[doc(alias = "revparse_single", alias = "git2")]
+    #[cfg(feature = "revision")]
     pub fn rev_parse_single<'repo, 'a>(
         &'repo self,
         spec: impl Into<&'a BStr>,