fix(server): keep commit file paths when a file moves up a directory

packages/server/src/utils/checkout-git.commits.test.ts

@@ -332,6 +332,21 @@ describe("listCheckoutCommits", () => {
     ]);
   });
 
+  it("keeps the destination path when a file moves up out of a directory", async () => {
+    const { repoDir } = initRepoOnMain();
+    git(["checkout", "-b", "feature"], repoDir);
+    mkdirSync(join(repoDir, "src", "nested"), { recursive: true });
+    commitFile(repoDir, "src/nested/a.txt", "content\n", "Add nested file");
+    git(["mv", "src/nested/a.txt", "src/a.txt"], repoDir);
+    commit(repoDir, "Move file up");
+
+    const { commits } = await listCheckoutCommits({ cwd: repoDir });
+
+    expect(commits[0]?.files).toEqual([
+      { path: "src/a.txt", additions: 0, deletions: 0, status: "renamed" },
+    ]);
+  });
+
   it("derives status for modified and deleted files", async () => {
     const { repoDir } = initRepoOnMain();
     git(["checkout", "-b", "feature"], repoDir);

packages/server/src/utils/checkout-git.ts

@@ -636,7 +636,10 @@ function normalizeNumstatPath(pathField: string): string {
   const braceRenameMatch = pathField.match(/^(.*)\{(.*) => (.*)\}(.*)$/);
   if (braceRenameMatch) {
     const [, prefix, , renamed, suffix] = braceRenameMatch;
-    return unquoteGitPath(`${prefix}${renamed}${suffix}`);
+    // Moving out of a directory prints `src/{nested => }/a.ts`, so an empty
+    // destination leaves a separator from each side behind.
+    const destination = renamed ? `${prefix}${renamed}${suffix}` : `${prefix}${suffix.slice(1)}`;
+    return unquoteGitPath(destination);
   }
 
   const inlineRenameMatch = pathField.match(/^(.*) => (.*)$/);