fix:editor can not replace text in empty file

metagpt/tools/libs/editor.py

@@ -13,7 +13,6 @@ from typing import List, Optional, Union
 from pydantic import BaseModel, ConfigDict
 
 from metagpt.const import DEFAULT_WORKSPACE_ROOT
-from metagpt.logs import logger
 from metagpt.tools.libs.index_repo import IndexRepo
 from metagpt.tools.libs.linter import Linter
 from metagpt.tools.tool_registry import register_tool
@@ -717,8 +716,6 @@ class Editor(BaseModel):
             If you need to use it multiple times, wait for the next turn.
         """
         # FIXME: support replacing *all* occurrences
-        if to_replace.strip() == "":
-            raise ValueError("`to_replace` must not be empty.")
 
         if to_replace == new_content:
             raise ValueError("`to_replace` and `new_content` must be different.")
@@ -730,6 +727,12 @@ class Editor(BaseModel):
         with file_name.open("r") as file:
             file_content = file.read()
 
+        if to_replace.strip() == "":
+            if file_content.strip() == "":
+                raise ValueError(f"The file '{file_name}' is empty. Please use the append method to add content.")
+            else:
+                raise ValueError("`to_replace` must not be empty.")
+
         if file_content.count(to_replace) > 1:
             raise ValueError(
                 "`to_replace` appears more than once, please include enough lines to make code in `to_replace` unique."

metagpt/tools/libs/linter.py

@@ -32,6 +32,7 @@ class Linter:
 
         self.languages = dict(
             python=self.py_lint,
+            sql=self.fake_lint,  # Base_lint lacks support for full SQL syntax. Use fake_lint to bypass the validation.
         )
         self.all_lint_cmd = None
 
@@ -112,6 +113,9 @@ class Linter:
             error = basic_lint(rel_fname, code)
         return error
 
+    def fake_lint(self, fname, rel_fname, code):
+        return None
+
 
 def lint_python_compile(fname, code):
     try: