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Merge pull request #921: fix(tools): provide diff hint when edit_file old_text not found

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Re-bin
2026-02-21 06:39:14 +00:00
parent 09a45f8993 4f5cb7d1e4
commit 900604e9ca
1 changed files with 7 additions and 16 deletions
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23
nanobot/agent/tools/filesystem.py
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@@ -172,30 +172,21 @@ class EditFileTool(Tool):
"""Build a helpful error when old_text is not found."""
lines = content.splitlines(keepends=True)
old_lines = old_text.splitlines(keepends=True)
best_ratio = 0.0
best_start = 0
window = len(old_lines)
best_ratio, best_start = 0.0, 0
for i in range(max(1, len(lines) - window + 1)):
chunk = lines[i : i + window]
ratio = difflib.SequenceMatcher(None, old_lines, chunk).ratio()
ratio = difflib.SequenceMatcher(None, old_lines, lines[i : i + window]).ratio()
if ratio > best_ratio:
best_ratio = ratio
best_start = i
best_ratio, best_start = ratio, i
if best_ratio > 0.5:
best_chunk = lines[best_start : best_start + window]
diff = difflib.unified_diff(
old_lines, best_chunk,
diff = "\n".join(difflib.unified_diff(
old_lines, lines[best_start : best_start + window],
fromfile="old_text (provided)", tofile=f"{path} (actual, line {best_start + 1})",
lineterm="",
)
diff_str = "\n".join(diff)
return (
f"Error: old_text not found in {path}.\n"
f"Best match ({best_ratio:.0%} similar) at line {best_start + 1}:\n{diff_str}"
)
))
return f"Error: old_text not found in {path}.\nBest match ({best_ratio:.0%} similar) at line {best_start + 1}:\n{diff}"
return f"Error: old_text not found in {path}. No similar text found. Verify the file content."