Enhance git_diff_context to handle file renaming and deletion

This commit enhances the `git_diff_context` function in `aicodebot/helpers.py` to handle file renaming and deletion. Previously, the function only handled new and modified files. Now, it can also handle renamed and deleted files.

The changes include:
- Splitting the status code and file name(s) into separate variables.
- Adding conditions to handle different status codes: 'A' for new files, 'R' for renamed files, and 'D' for deleted files.
- Updating the `tests/test_helpers.py` to include tests for the new functionality.

This enhancement provides a more comprehensive overview of changes in the git repository.

aicodebot/helpers.py

@@ -29,14 +29,26 @@ def git_diff_context(commit=None):
 
         diffs = []
         for status in file_status:
-            status_code, file_name = status.split("\t")
+            status_parts = status.split("\t")
+            status_code = status_parts[0][0]  # Get the first character of the status code
             if status_code == "A":
                 # If the file is new, include the entire file content
+                file_name = status_parts[1]
                 contents = Path(file_name).read_text()
                 diffs.append(f"## New file added: {file_name}")
                 diffs.append(contents)
+            elif status_code == "R":
+                # If the file is renamed, get the diff and note the old and new names
+                old_file_name, new_file_name = status_parts[1], status_parts[2]
+                diffs.append(f"## File renamed: {old_file_name} -> {new_file_name}")
+                diffs.append(exec_and_get_output(base_git_diff + [diff_type, "--", new_file_name]))
+            elif status_code == "D":
+                # If the file is deleted, note the deletion
+                file_name = status_parts[1]
+                diffs.append(f"## File deleted: {file_name}")
             else:
-                # If the file is not new, get the diff
+                # If the file is not new, renamed, or deleted, get the diff
+                file_name = status_parts[1]
                 diffs.append(f"## File changed: {file_name}")
                 diffs.append(exec_and_get_output(base_git_diff + [diff_type, "--", file_name]))
 

tests/test_helpers.py

@@ -61,10 +61,25 @@ def test_git_diff_context(temp_git_repo):
     diff = git_diff_context()
     assert diff == ""
 
+    # Rename the file but don't stage it
+    temp_git_repo.git.mv("newfile.txt", "renamedfile.txt")
+    diff = git_diff_context()
+    assert "## File renamed: newfile.txt -> renamedfile.txt" in diff
+
+    # Stage the renamed file
+    temp_git_repo.git.add("renamedfile.txt")
+    diff = git_diff_context()
+    assert "## File renamed: newfile.txt -> renamedfile.txt" in diff
+
+    # Commit the renamed file
+    temp_git_repo.git.commit("-m", "Rename newfile.txt to renamedfile.txt")
+    diff = git_diff_context()
+    assert diff == ""
+
     # Test diff for a specific commit
     commit = temp_git_repo.head.commit.hexsha
     diff = git_diff_context(commit)
-    assert "This is a modified file." in diff
+    assert "renamedfile.txt" in diff
 
 
 def test_exec_and_get_output_success():