ReMe/reme/steps/file_io/load.py

66 lines
2.5 KiB
Python

"""Load a complete text file for an interactive editor."""
from datetime import datetime
from ._file_io import read_file_safe
from ._path import _check_path_permission, resolve_path
from ..base_step import BaseStep
from ...components import R
DEFAULT_EDITOR_MAX_BYTES = 5 * 1024 * 1024
@R.register("load_step")
class LoadStep(BaseStep):
"""Return complete text without the truncation used by agent-facing reads."""
def _fail(self, message: str, **metadata) -> None:
assert self.context is not None
self.context.response.success = False
self.context.response.answer = f"Error: {message}"
self.context.response.metadata.update(metadata)
async def execute(self):
assert self.context is not None
raw_path = str(self.context.get("path") or "")
max_bytes = int(self.context.get("max_bytes") or self.kwargs.get("max_bytes") or DEFAULT_EDITOR_MAX_BYTES)
target, error = resolve_path(self.workspace_path, raw_path)
if error or target is None:
self._fail(error or "invalid path", path=raw_path)
return self.context.response
if not _check_path_permission(self.workspace_path, target, self.context.get("_allowed_paths")):
self._fail("no permission to read this file", path=raw_path)
return self.context.response
if not target.is_file():
self._fail("file does not exist", path=raw_path)
return self.context.response
stat = target.stat()
if stat.st_size > max_bytes:
self._fail(
f"file is too large for the editor ({stat.st_size} bytes; limit {max_bytes})",
code="file_too_large",
path=raw_path,
size=stat.st_size,
max_bytes=max_bytes,
)
return self.context.response
try:
content, encoding = await read_file_safe(target, max_bytes=max_bytes)
except Exception as exc: # pylint: disable=broad-except
self._fail(f"load failed: {exc}", path=raw_path)
return self.context.response
self.context.response.success = True
self.context.response.answer = content
self.context.response.metadata.update(
{
"path": raw_path,
"exists": True,
"type": "file",
"size": stat.st_size,
"mtime": datetime.fromtimestamp(stat.st_mtime).isoformat(),
"encoding": encoding,
},
)
return self.context.response