If paths from edit steps omit worktree root, search worktrees for relative path (#15543)

Release Notes:

- N/A

Co-authored-by: Nathan <nathan@zed.dev>

crates/assistant/src/context.rs

@@ -528,7 +528,7 @@ impl EditOperation {
             let buffer = project
                 .update(&mut cx, |project, cx| {
                     let project_path = project
-                        .project_path_for_full_path(Path::new(&path), cx)
+                        .find_project_path(Path::new(&path), cx)
                         .with_context(|| format!("worktree not found for {:?}", path))?;
                     anyhow::Ok(project.open_buffer(project_path, cx))
                 })??

crates/project/src/project.rs

@@ -8341,36 +8341,47 @@ impl Project {
         })
     }
 
-    /// Attempts to find a `ProjectPath` corresponding to the given full path.
+    /// Attempts to find a `ProjectPath` corresponding to the given path. If the path
+    /// is a *full path*, meaning it starts with the root name of a worktree, we'll locate
+    /// it in that worktree. Otherwise, we'll attempt to find it as a relative path in
+    /// the first visible worktree that has an entry for that relative path.
     ///
-    /// This method iterates through all worktrees in the project, trying to match
-    /// the given full path against each worktree's root name. If a match is found,
-    /// it returns a `ProjectPath` containing the worktree ID and the relative path
-    /// within that worktree.
+    /// We use this to resolve edit steps, when there's a chance an LLM may omit the workree
+    /// root name from paths.
     ///
     /// # Arguments
     ///
-    /// * `full_path` - A reference to a `Path` representing the full path to resolve.
+    /// * `path` - A full path that starts with a worktree root name, or alternatively a
+    ///            relative path within a visible worktree.
     /// * `cx` - A reference to the `AppContext`.
     ///
     /// # Returns
     ///
     /// Returns `Some(ProjectPath)` if a matching worktree is found, otherwise `None`.
-    pub fn project_path_for_full_path(
-        &self,
-        full_path: &Path,
-        cx: &AppContext,
-    ) -> Option<ProjectPath> {
-        self.worktree_store.read_with(cx, |worktree_store, cx| {
-            worktree_store.worktrees().find_map(|worktree| {
-                let worktree_root_name = worktree.read(cx).root_name();
-                let relative_path = full_path.strip_prefix(worktree_root_name).ok()?;
-                Some(ProjectPath {
+    pub fn find_project_path(&self, path: &Path, cx: &AppContext) -> Option<ProjectPath> {
+        let worktree_store = self.worktree_store.read(cx);
+
+        for worktree in worktree_store.visible_worktrees(cx) {
+            let worktree_root_name = worktree.read(cx).root_name();
+            if let Ok(relative_path) = path.strip_prefix(worktree_root_name) {
+                return Some(ProjectPath {
                     worktree_id: worktree.read(cx).id(),
                     path: relative_path.into(),
-                })
-            })
-        })
+                });
+            }
+        }
+
+        for worktree in worktree_store.visible_worktrees(cx) {
+            let worktree = worktree.read(cx);
+            if let Some(entry) = worktree.entry_for_path(path) {
+                return Some(ProjectPath {
+                    worktree_id: worktree.id(),
+                    path: entry.path.clone(),
+                });
+            }
+        }
+
+        None
     }
 
     pub fn get_workspace_root(