change index/worktree diff to a visitor based API

Author: pascalkuthe

gix-worktree/src/diff.rs

@@ -7,6 +7,7 @@ use crate::fs;
 
 pub mod checkout;
 pub(crate) mod entry;
+pub mod status;
 
 /// Note that interruption still produce an `Ok(…)` value, so the caller should look at `should_interrupt` to communicate the outcome.
 /// `dir` is the directory into which to checkout the `index`.

gix-worktree/src/index/mod.rs

@@ -0,0 +1,28 @@
+//!
+
+mod worktree;
+
+mod index;
+
+///
+pub mod visit;
+
+///
+pub mod recorder;
+
+///
+pub struct IndexStatus<'index> {
+    index: &'index gix_index::State,
+}
+
+impl<'index> From<&'index gix_index::File> for IndexStatus<'index> {
+    fn from(file: &'index gix_index::File) -> Self {
+        Self { index: file }
+    }
+}
+
+impl<'index> From<&'index gix_index::State> for IndexStatus<'index> {
+    fn from(index: &'index gix_index::State) -> Self {
+        Self { index }
+    }
+}

gix-worktree/src/index/status.rs

@@ -0,0 +1 @@
+// TODO: index to index diff

gix-worktree/src/index/status/index.rs

@@ -0,0 +1,4 @@
+///
+pub mod index;
+///
+pub mod worktree;

gix-worktree/src/index/status/recorder.rs

@@ -0,0 +1 @@
+// TODO: index diff