82 lines
3.2 KiB
Python
82 lines
3.2 KiB
Python
# shell_runner.py
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import os, subprocess, shutil
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from pathlib import Path
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from typing import Callable, Optional
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try:
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import tomllib
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except ImportError:
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import tomli as tomllib # type: ignore[no-redef]
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TIMEOUT_SECONDS: int = 60
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_ENV_CONFIG: dict = {}
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def _load_env_config() -> dict:
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"""Load mcp_env.toml from project root (sibling of this file or parent dir)."""
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candidates = [
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Path(__file__).parent / "mcp_env.toml",
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Path(__file__).parent.parent / "mcp_env.toml",
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]
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for p in candidates:
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if p.exists():
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with open(p, "rb") as f:
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return tomllib.load(f)
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return {}
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def _build_subprocess_env() -> dict[str, str]:
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"""Build env dict for subprocess: current env + mcp_env.toml overrides."""
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global _ENV_CONFIG
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if not _ENV_CONFIG:
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_ENV_CONFIG = _load_env_config()
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env = os.environ.copy()
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# Apply [path].prepend entries
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prepend_dirs = _ENV_CONFIG.get("path", {}).get("prepend", [])
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if prepend_dirs:
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env["PATH"] = os.pathsep.join(prepend_dirs) + os.pathsep + env.get("PATH", "")
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# Apply [env] key-value pairs, expanding ${VAR} references
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for key, val in _ENV_CONFIG.get("env", {}).items():
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env[key] = os.path.expandvars(str(val))
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return env
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def run_powershell(script: str, base_dir: str, qa_callback: Optional[Callable[[str], str]] = None) -> str:
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"""
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Run a PowerShell script with working directory set to base_dir.
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Returns a string combining stdout, stderr, and exit code.
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Environment is configured via mcp_env.toml (project root).
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If qa_callback is provided and the command fails or has stderr,
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the callback is called with the stderr content and its result is appended.
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"""
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safe_dir: str = str(base_dir).replace("'", "''")
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full_script: str = f"Set-Location -LiteralPath '{safe_dir}'\n{script}"
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exe: Optional[str] = next((x for x in ["powershell.exe", "pwsh.exe", "powershell", "pwsh"] if shutil.which(x)), None)
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if not exe: return "ERROR: Neither powershell nor pwsh found in PATH"
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try:
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process = subprocess.Popen(
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[exe, "-NoProfile", "-NonInteractive", "-Command", full_script],
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stdin=subprocess.DEVNULL,
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stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True,
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cwd=base_dir, env=_build_subprocess_env(),
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)
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stdout, stderr = process.communicate(timeout=TIMEOUT_SECONDS)
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parts: list[str] = []
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if stdout.strip(): parts.append(f"STDOUT:\n{stdout.strip()}")
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if stderr.strip(): parts.append(f"STDERR:\n{stderr.strip()}")
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parts.append(f"EXIT CODE: {process.returncode}")
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if (process.returncode != 0 or stderr.strip()) and qa_callback:
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qa_analysis: Optional[str] = qa_callback(stderr.strip())
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if qa_analysis:
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parts.append(f"\nQA ANALYSIS:\n{qa_analysis}")
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return "\n".join(parts)
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except subprocess.TimeoutExpired:
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if 'process' in locals() and process:
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subprocess.run(["taskkill", "/F", "/T", "/PID", str(process.pid)], capture_output=True)
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return f"ERROR: timed out after {TIMEOUT_SECONDS}s"
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except KeyboardInterrupt:
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if 'process' in locals() and process:
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subprocess.run(["taskkill", "/F", "/T", "/PID", str(process.pid)], capture_output=True)
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raise
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except Exception as e:
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if 'process' in locals() and process:
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subprocess.run(["taskkill", "/F", "/T", "/PID", str(process.pid)], capture_output=True)
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return f"ERROR: {e}"
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