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from pathlib import Path
from typing import Optional, Callable, Dict, List
from dataclasses import dataclass
import subprocess
import re
from llm import AgentConfig, JSON
from web_utils import fetch_and_markdownify, FetchSuccess, FetchError
@dataclass
class Action:
"""Class for LLM actions.
Should only be called on JSON dicts where "action" -> `name`.
"""
name: str
description: str
handler: Callable[[JSON, AgentConfig], JSON]
required_keys: List[str]
formatter: Callable[[JSON], str] = lambda args: (
f"{args['action']} with "
+ ",".join([f"{arg} as {args[arg]}" for arg in args if arg != "action"])
)
def __call__(self, data: JSON, config: AgentConfig) -> JSON:
return self.handler(data, config)
def _path_checked(path: Path, cwd=Path.cwd()) -> Optional[Path]:
"""Resolves `path`, returning `None` if it's not a subdirectory of `cwd`."""
path = (path if path.is_absolute() else (cwd / path)).resolve()
cwd = cwd.resolve()
return path if path.is_relative_to(cwd) else None
def _path_helper(path_str: str, callback, cwd=Path.cwd()):
path = _path_checked(Path(path_str), cwd=cwd)
if path is None:
return {"status": "error", "reason": f"Permission denied: {path_str}"}
else:
try:
return {"status": "success", **callback(path)}
except Exception as e:
return {"status": "error", "reason": f"Failure: {e}"}
def _ls(args: JSON, config: AgentConfig) -> JSON:
'{"action": "ls", "path": PATH} - list files at PATH'
def inner(path: Path):
return {"content": list(map(lambda s: str(s), path.iterdir()))}
return _path_helper(args["path"], inner, cwd=config.workdir)
def _read(args: JSON, config: AgentConfig) -> JSON:
'{"action": "read", "path": PATH} - read file at PATH'
def inner(path: Path):
contents = path.read_text(encoding="utf-8")
return {"content": contents}
return _path_helper(args["path"], inner, cwd=config.workdir)
def _write(args: JSON, config: AgentConfig) -> JSON:
'{"action": "write", "path": PATH, "content": CONTENT} - write CONTENT into file at PATH'
def inner(path: Path, text: str):
n_bytes = path.write_text(text)
return {"bytes": n_bytes}
return _path_helper(
args["path"], lambda path: inner(path, args["content"]), cwd=config.workdir
)
def _tldr(args: JSON, config: AgentConfig) -> JSON:
'{"action": "tldr", "program": PROGRAM} - read tldr docs for PROGRAM'
try:
result = subprocess.run(
["tldr", args["program"]], capture_output=True, text=True, check=True
)
return {"status": "success", "content": result.stdout}
except subprocess.CalledProcessError:
return {"status": "error", "reason": f"Tldr for '{args['program']}' not found."}
except Exception as e:
return {"status": "error", "reason": f"An unexpected error occurred: {e}"}
def _shell(args: JSON, config: AgentConfig) -> JSON:
'{"action": "shell", "command": CMD} - Propose executing a shell command, but interrupts to ask for permission from the user.'
res = subprocess.run(
args["command"],
shell=True,
cwd=config.workdir,
capture_output=True,
text=True,
)
if res.returncode == 0:
return {"status": "success", "stdout": res.stdout}
else:
return {
"status": "error",
"reason": f"Shell command exited with code {res.returncode}",
"stdout": res.stdout,
"stderr": res.stderr,
}
def _mypy(args: JSON, config: AgentConfig) -> JSON:
'{"action": "mypy", "path": PATH} - run mypy type checking on PATH'
def inner(path: Path):
try:
res = subprocess.run(
["mypy", str(path)], cwd=config.workdir, capture_output=True, text=True
)
if res.returncode == 0:
return {"status": "success", "stdout": res.stdout}
else:
return {"status": "error", "stderr": res.stderr}
except Exception as e:
return {"status": "error", "reason": f"An unexpected error occurred: {e}"}
return _path_helper(args["path"], inner, cwd=config.workdir)
def _webgrep(args: JSON, config: AgentConfig) -> JSON:
'{"action": "webgrep", "url": URL, "keywords": KEYWORD_LIST} - find case-insensitive matches in markdownified content of URL for keywords in KEYWORD_LIST plus some context on both sides'
match fetch_and_markdownify(args["url"]):
case FetchError(e):
return {"status": "error", "reason": e}
case FetchSuccess(content):
matches = map(
lambda m: content[
max(0, m.start() - config.search_padding) : min(
len(content), m.end() + config.search_padding
)
],
re.finditer(
"|".join(map(lambda kw: re.escape(kw), args["keywords"])),
content,
re.IGNORECASE,
),
)
return {"status": "success", "matches": list(matches)}
ls = Action("ls", _ls.__doc__ or "", _ls, ["path"])
read = Action("read", _read.__doc__ or "", _read, ["path"])
write = Action(
"write",
_write.__doc__ or "",
_write,
["path", "content"],
formatter=lambda args: f"write {args['path']}",
)
tldr = Action("tldr", _tldr.__doc__ or "", _tldr, ["program"])
shell = Action(
"shell",
_shell.__doc__ or "",
_shell,
["command"],
formatter=lambda args: f"shell command `{args['command']}`",
)
mypy = Action(
"mypy",
_mypy.__doc__ or "",
_mypy,
["path"],
formatter=lambda args: f"type check {args['path']}",
)
webgrep = Action(
"webgrep",
_webgrep.__doc__ or "",
_webgrep,
["url", "keywords"],
formatter=lambda args: f"search {args['url']}",
)
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