Matte23
80c2f9b159
DockerSandbox + LangChain file/shell tools extracted into a standalone package. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
66 lines
2.5 KiB
Python
66 lines
2.5 KiB
Python
"""edit_file.py – tool for str_replace editing of files inside the sandbox."""
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from __future__ import annotations
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from shlex import quote
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from typing import TYPE_CHECKING
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from langchain_core.tools import BaseTool, tool
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from loguru import logger
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if TYPE_CHECKING:
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from docker_agent_sandbox.sandbox import DockerSandbox
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def make_edit_file_tool(sandbox: "DockerSandbox") -> BaseTool:
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"""Return an edit_file tool bound to *sandbox*."""
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@tool
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def edit_file(path: str, old_str: str, new_str: str) -> str:
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"""
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Replace the first exact occurrence of *old_str* with *new_str* in *path*.
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This is the standard ``str_replace`` editing primitive: read the file,
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find the unique snippet you want to change, and supply the replacement.
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Rules:
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- *old_str* must match **exactly** (including whitespace and indentation).
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- *old_str* must appear **at least once**; the tool returns an error if it
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is not found.
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- If *old_str* appears more than once the tool refuses and asks you to
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provide more surrounding context to make it unique.
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- To insert text without removing anything, set *old_str* to a line that
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will remain and include it verbatim in *new_str* (i.e. keep the anchor
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line and add your new lines around it).
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- To delete a block, set *new_str* to an empty string ``""``.
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Returns a confirmation with the number of lines affected, or an error.
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"""
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logger.debug("Editing file inside sandbox: {!r}", path)
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exit_code, content = sandbox.exec(f"cat -- {quote(path)}")
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if exit_code != 0:
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return f"[ERROR reading {path!r} for edit] {content.strip()}"
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count = content.count(old_str)
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if count == 0:
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return (
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f"[ERROR] old_str not found in {path!r}. "
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"Check that whitespace and indentation match exactly."
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)
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if count > 1:
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return (
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f"[ERROR] old_str appears {count} times in {path!r}. "
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"Provide more surrounding context to make it unique."
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)
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new_content = content.replace(old_str, new_str, 1)
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old_lines = old_str.count("\n") + 1
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new_lines = new_str.count("\n") + 1 if new_str else 0
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try:
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sandbox.write_file(path, new_content)
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except Exception as exc:
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return f"[ERROR writing {path!r} after edit] {exc}"
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return f"[OK] Replaced {old_lines} line(s) with {new_lines} line(s) in {path}"
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return edit_file
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