"""Utility to run shell commands asynchronously with a timeout."""
import asyncio
TRUNCATED_MESSAGE: str = "<response clipped><NOTE>To save on context only part of this file has been shown to you. You should retry this tool after you have searched inside the file with `grep -n` in order to find the line numbers of what you are looking for.</NOTE>"
MAX_RESPONSE_LEN: int = 16000
def maybe_truncate(content: str, truncate_after: int | None = MAX_RESPONSE_LEN):
"""Truncate content and append a notice if content exceeds the specified length."""
return (
content
if not truncate_after or len(content) <= truncate_after
else content[:truncate_after] + TRUNCATED_MESSAGE
)
async def run(
cmd: str,
timeout: float | None = 120.0, # seconds
truncate_after: int | None = MAX_RESPONSE_LEN,
):
"""Run a shell command asynchronously with a timeout."""
process = await asyncio.create_subprocess_shell(
cmd, stdout=asyncio.subprocess.PIPE, stderr=asyncio.subprocess.PIPE
)
try:
stdout, stderr = await asyncio.wait_for(process.communicate(), timeout=timeout)
return (
process.returncode or 0,
maybe_truncate(stdout.decode(), truncate_after=truncate_after),
maybe_truncate(stderr.decode(), truncate_after=truncate_after),
)
except asyncio.TimeoutError as exc:
try:
process.kill()
except ProcessLookupError:
pass
raise TimeoutError(
f"Command '{cmd}' timed out after {timeout} seconds"
) from exc