Add a version-control statusline element (#5682)

1 files changed, 13 insertions, 1 deletions

diff --git a/helix-vcs/src/lib.rs b/helix-vcs/src/lib.rs
index 97320d32..6f5e40d0 100644
--- a/helix-vcs/src/lib.rs
+++ b/helix-vcs/src/lib.rs
@@ -1,4 +1,5 @@
-use std::path::Path;
+use arc_swap::ArcSwap;
+use std::{path::Path, sync::Arc};
 
 #[cfg(feature = "git")]
 pub use git::Git;
@@ -18,6 +19,7 @@ pub trait DiffProvider {
     /// The data is returned as raw byte without any decoding or encoding performed
     /// to ensure all file encodings are handled correctly.
     fn get_diff_base(&self, file: &Path) -> Option<Vec<u8>>;
+    fn get_current_head_name(&self, file: &Path) -> Option<Arc<ArcSwap<Box<str>>>>;
 }
 
 #[doc(hidden)]
@@ -26,6 +28,10 @@ impl DiffProvider for Dummy {
     fn get_diff_base(&self, _file: &Path) -> Option<Vec<u8>> {
         None
     }
+
+    fn get_current_head_name(&self, _file: &Path) -> Option<Arc<ArcSwap<Box<str>>>> {
+        None
+    }
 }
 
 pub struct DiffProviderRegistry {
@@ -38,6 +44,12 @@ impl DiffProviderRegistry {
             .iter()
             .find_map(|provider| provider.get_diff_base(file))
     }
+
+    pub fn get_current_head_name(&self, file: &Path) -> Option<Arc<ArcSwap<Box<str>>>> {
+        self.providers
+            .iter()
+            .find_map(|provider| provider.get_current_head_name(file))
+    }
 }
 
 impl Default for DiffProviderRegistry {