added lint reflection

aider/coders/base_coder.py

@@ -20,6 +20,7 @@ from aider import __version__, models, prompts, utils
 from aider.commands import Commands
 from aider.history import ChatSummary
 from aider.io import InputOutput
+from aider.linter import Linter
 from aider.litellm import litellm
 from aider.mdstream import MarkdownStream
 from aider.repo import GitRepo
@@ -287,6 +288,8 @@ class Coder:
                 self.verbose,
             )
 
+        self.linter = Linter(root=self.root, encoding=io.encoding)
+
         if max_chat_history_tokens is None:
             max_chat_history_tokens = self.main_model.max_chat_history_tokens
         self.summarizer = ChatSummary(
@@ -721,8 +724,16 @@ class Coder:
 
         edited, edit_error = self.apply_updates()
         if edit_error:
-            self.update_cur_messages(set())
             self.reflected_message = edit_error
+            self.update_cur_messages(set())
+            return
+
+        if edited:
+            lint_errors = self.lint_edited(edited)
+            if lint_errors:
+                self.reflected_message = lint_errors
+                self.update_cur_messages(set())
+                return
 
         self.update_cur_messages(edited)
 
@@ -744,6 +755,20 @@ class Coder:
             else:
                 self.reflected_message = add_rel_files_message
 
+    def lint_edited(self, fnames):
+        res = ""
+        for fname in fnames:
+            errors = self.linter.lint(fname)
+            if errors:
+                res += "\n"
+                res += errors
+                res += "\n"
+
+        if res:
+            self.io.tool_error(res)
+
+        return res
+
     def update_cur_messages(self, edited):
         if self.partial_response_content:
             self.cur_messages += [dict(role="assistant", content=self.partial_response_content)]

aider/linter.py

@@ -89,7 +89,7 @@ def basic_lint(fname, code):
     )
     context.add_lines_of_interest(errors)
     context.add_context()
-    output = "# Syntax Errors found on the lines marked with █\n"
+    output = "# Syntax Errors found on the lines marked with █\n\n"
     output += fname + ":\n"
     output += context.format()