forked from mirrors/nixpkgs
1339 lines
43 KiB
Python
Executable file
1339 lines
43 KiB
Python
Executable file
#! /somewhere/python3
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from contextlib import contextmanager, _GeneratorContextManager
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from queue import Queue, Empty
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from typing import Tuple, Any, Callable, Dict, Iterator, Optional, List, Iterable
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from xml.sax.saxutils import XMLGenerator
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from colorama import Style
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from pathlib import Path
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import queue
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import io
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import threading
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import argparse
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import base64
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import codecs
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import os
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import ptpython.repl
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import pty
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import re
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import shlex
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import shutil
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import socket
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import subprocess
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import sys
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import tempfile
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import time
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import unicodedata
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CHAR_TO_KEY = {
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"A": "shift-a",
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"N": "shift-n",
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"-": "0x0C",
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"_": "shift-0x0C",
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"B": "shift-b",
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"O": "shift-o",
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"=": "0x0D",
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"+": "shift-0x0D",
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"C": "shift-c",
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"P": "shift-p",
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"[": "0x1A",
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"{": "shift-0x1A",
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"D": "shift-d",
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"Q": "shift-q",
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"]": "0x1B",
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"}": "shift-0x1B",
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"E": "shift-e",
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"R": "shift-r",
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";": "0x27",
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":": "shift-0x27",
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"F": "shift-f",
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"S": "shift-s",
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"'": "0x28",
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'"': "shift-0x28",
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"G": "shift-g",
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"T": "shift-t",
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"`": "0x29",
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"~": "shift-0x29",
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"H": "shift-h",
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"U": "shift-u",
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"\\": "0x2B",
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"|": "shift-0x2B",
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"I": "shift-i",
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"V": "shift-v",
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",": "0x33",
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"<": "shift-0x33",
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"J": "shift-j",
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"W": "shift-w",
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".": "0x34",
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">": "shift-0x34",
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"K": "shift-k",
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"X": "shift-x",
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"/": "0x35",
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"?": "shift-0x35",
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"L": "shift-l",
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"Y": "shift-y",
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" ": "spc",
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"M": "shift-m",
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"Z": "shift-z",
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"\n": "ret",
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"!": "shift-0x02",
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"@": "shift-0x03",
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"#": "shift-0x04",
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"$": "shift-0x05",
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"%": "shift-0x06",
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"^": "shift-0x07",
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"&": "shift-0x08",
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"*": "shift-0x09",
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"(": "shift-0x0A",
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")": "shift-0x0B",
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}
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class Logger:
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def __init__(self) -> None:
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self.logfile = os.environ.get("LOGFILE", "/dev/null")
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self.logfile_handle = codecs.open(self.logfile, "wb")
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self.xml = XMLGenerator(self.logfile_handle, encoding="utf-8")
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self.queue: "Queue[Dict[str, str]]" = Queue()
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self.xml.startDocument()
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self.xml.startElement("logfile", attrs={})
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self._print_serial_logs = True
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@staticmethod
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def _eprint(*args: object, **kwargs: Any) -> None:
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print(*args, file=sys.stderr, **kwargs)
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def close(self) -> None:
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self.xml.endElement("logfile")
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self.xml.endDocument()
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self.logfile_handle.close()
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def sanitise(self, message: str) -> str:
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return "".join(ch for ch in message if unicodedata.category(ch)[0] != "C")
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def maybe_prefix(self, message: str, attributes: Dict[str, str]) -> str:
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if "machine" in attributes:
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return "{}: {}".format(attributes["machine"], message)
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return message
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def log_line(self, message: str, attributes: Dict[str, str]) -> None:
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self.xml.startElement("line", attributes)
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self.xml.characters(message)
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self.xml.endElement("line")
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def info(self, *args, **kwargs) -> None: # type: ignore
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self.log(*args, **kwargs)
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def warning(self, *args, **kwargs) -> None: # type: ignore
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self.log(*args, **kwargs)
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def error(self, *args, **kwargs) -> None: # type: ignore
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self.log(*args, **kwargs)
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sys.exit(1)
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def log(self, message: str, attributes: Dict[str, str] = {}) -> None:
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self._eprint(self.maybe_prefix(message, attributes))
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self.drain_log_queue()
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self.log_line(message, attributes)
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def log_serial(self, message: str, machine: str) -> None:
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self.enqueue({"msg": message, "machine": machine, "type": "serial"})
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if self._print_serial_logs:
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self._eprint(
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Style.DIM + "{} # {}".format(machine, message) + Style.RESET_ALL
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)
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def enqueue(self, item: Dict[str, str]) -> None:
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self.queue.put(item)
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def drain_log_queue(self) -> None:
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try:
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while True:
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item = self.queue.get_nowait()
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msg = self.sanitise(item["msg"])
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del item["msg"]
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self.log_line(msg, item)
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except Empty:
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pass
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@contextmanager
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def nested(self, message: str, attributes: Dict[str, str] = {}) -> Iterator[None]:
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self._eprint(self.maybe_prefix(message, attributes))
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self.xml.startElement("nest", attrs={})
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self.xml.startElement("head", attributes)
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self.xml.characters(message)
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self.xml.endElement("head")
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tic = time.time()
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self.drain_log_queue()
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yield
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self.drain_log_queue()
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toc = time.time()
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self.log("({:.2f} seconds)".format(toc - tic))
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self.xml.endElement("nest")
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rootlog = Logger()
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def make_command(args: list) -> str:
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return " ".join(map(shlex.quote, (map(str, args))))
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def retry(fn: Callable, timeout: int = 900) -> None:
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"""Call the given function repeatedly, with 1 second intervals,
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until it returns True or a timeout is reached.
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"""
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for _ in range(timeout):
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if fn(False):
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return
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time.sleep(1)
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if not fn(True):
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raise Exception(f"action timed out after {timeout} seconds")
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def _perform_ocr_on_screenshot(
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screenshot_path: str, model_ids: Iterable[int]
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) -> List[str]:
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if shutil.which("tesseract") is None:
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raise Exception("OCR requested but enableOCR is false")
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magick_args = (
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"-filter Catrom -density 72 -resample 300 "
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+ "-contrast -normalize -despeckle -type grayscale "
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+ "-sharpen 1 -posterize 3 -negate -gamma 100 "
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+ "-blur 1x65535"
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)
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tess_args = f"-c debug_file=/dev/null --psm 11"
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cmd = f"convert {magick_args} {screenshot_path} tiff:{screenshot_path}.tiff"
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ret = subprocess.run(cmd, shell=True, capture_output=True)
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if ret.returncode != 0:
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raise Exception(f"TIFF conversion failed with exit code {ret.returncode}")
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model_results = []
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for model_id in model_ids:
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cmd = f"tesseract {screenshot_path}.tiff - {tess_args} --oem {model_id}"
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ret = subprocess.run(cmd, shell=True, capture_output=True)
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if ret.returncode != 0:
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raise Exception(f"OCR failed with exit code {ret.returncode}")
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model_results.append(ret.stdout.decode("utf-8"))
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return model_results
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class StartCommand:
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"""The Base Start Command knows how to append the necesary
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runtime qemu options as determined by a particular test driver
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run. Any such start command is expected to happily receive and
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append additional qemu args.
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"""
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_cmd: str
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def cmd(
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self,
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monitor_socket_path: Path,
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shell_socket_path: Path,
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allow_reboot: bool = False, # TODO: unused, legacy?
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) -> str:
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display_opts = ""
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display_available = any(x in os.environ for x in ["DISPLAY", "WAYLAND_DISPLAY"])
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if not display_available:
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display_opts += " -nographic"
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# qemu options
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qemu_opts = ""
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qemu_opts += (
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""
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if allow_reboot
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else " -no-reboot"
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" -device virtio-serial"
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" -device virtconsole,chardev=shell"
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" -device virtio-rng-pci"
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" -serial stdio"
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)
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# TODO: qemu script already catpures this env variable, legacy?
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qemu_opts += " " + os.environ.get("QEMU_OPTS", "")
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return (
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f"{self._cmd}"
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f" -monitor unix:{monitor_socket_path}"
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f" -chardev socket,id=shell,path={shell_socket_path}"
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f"{qemu_opts}"
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f"{display_opts}"
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)
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@staticmethod
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def build_environment(
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state_dir: Path,
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shared_dir: Path,
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) -> dict:
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# We make a copy to not update the current environment
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env = dict(os.environ)
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env.update(
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{
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"TMPDIR": str(state_dir),
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"SHARED_DIR": str(shared_dir),
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"USE_TMPDIR": "1",
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}
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)
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return env
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def run(
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self,
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state_dir: Path,
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shared_dir: Path,
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monitor_socket_path: Path,
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shell_socket_path: Path,
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) -> subprocess.Popen:
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return subprocess.Popen(
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self.cmd(monitor_socket_path, shell_socket_path),
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stdin=subprocess.DEVNULL,
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stdout=subprocess.PIPE,
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stderr=subprocess.STDOUT,
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shell=True,
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cwd=state_dir,
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env=self.build_environment(state_dir, shared_dir),
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)
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class NixStartScript(StartCommand):
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"""A start script from nixos/modules/virtualiation/qemu-vm.nix
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that also satisfies the requirement of the BaseStartCommand.
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These Nix commands have the particular charactersitic that the
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machine name can be extracted out of them via a regex match.
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(Admittedly a _very_ implicit contract, evtl. TODO fix)
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"""
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def __init__(self, script: str):
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self._cmd = script
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@property
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def machine_name(self) -> str:
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match = re.search("run-(.+)-vm$", self._cmd)
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name = "machine"
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if match:
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name = match.group(1)
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return name
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class LegacyStartCommand(StartCommand):
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"""Used in some places to create an ad-hoc machine instead of
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using nix test instrumentation + module system for that purpose.
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Legacy.
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"""
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def __init__(
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self,
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netBackendArgs: Optional[str] = None,
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netFrontendArgs: Optional[str] = None,
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hda: Optional[Tuple[Path, str]] = None,
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cdrom: Optional[str] = None,
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usb: Optional[str] = None,
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bios: Optional[str] = None,
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qemuFlags: Optional[str] = None,
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):
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self._cmd = "qemu-kvm -m 384"
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# networking
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net_backend = "-netdev user,id=net0"
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net_frontend = "-device virtio-net-pci,netdev=net0"
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if netBackendArgs is not None:
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net_backend += "," + netBackendArgs
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if netFrontendArgs is not None:
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net_frontend += "," + netFrontendArgs
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self._cmd += f" {net_backend} {net_frontend}"
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# hda
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hda_cmd = ""
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if hda is not None:
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hda_path = hda[0].resolve()
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hda_interface = hda[1]
|
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if hda_interface == "scsi":
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hda_cmd += (
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f" -drive id=hda,file={hda_path},werror=report,if=none"
|
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" -device scsi-hd,drive=hda"
|
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)
|
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else:
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hda_cmd += f" -drive file={hda_path},if={hda_interface},werror=report"
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self._cmd += hda_cmd
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|
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# cdrom
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if cdrom is not None:
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self._cmd += f" -cdrom {cdrom}"
|
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|
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# usb
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usb_cmd = ""
|
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if usb is not None:
|
||
# https://github.com/qemu/qemu/blob/master/docs/usb2.txt
|
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usb_cmd += (
|
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" -device usb-ehci"
|
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f" -drive id=usbdisk,file={usb},if=none,readonly"
|
||
" -device usb-storage,drive=usbdisk "
|
||
)
|
||
self._cmd += usb_cmd
|
||
|
||
# bios
|
||
if bios is not None:
|
||
self._cmd += f" -bios {bios}"
|
||
|
||
# qemu flags
|
||
if qemuFlags is not None:
|
||
self._cmd += f" {qemuFlags}"
|
||
|
||
|
||
class Machine:
|
||
"""A handle to the machine with this name, that also knows how to manage
|
||
the machine lifecycle with the help of a start script / command."""
|
||
|
||
name: str
|
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tmp_dir: Path
|
||
shared_dir: Path
|
||
state_dir: Path
|
||
monitor_path: Path
|
||
shell_path: Path
|
||
|
||
start_command: StartCommand
|
||
keep_vm_state: bool
|
||
allow_reboot: bool
|
||
|
||
process: Optional[subprocess.Popen]
|
||
pid: Optional[int]
|
||
monitor: Optional[socket.socket]
|
||
shell: Optional[socket.socket]
|
||
serial_thread: Optional[threading.Thread]
|
||
|
||
booted: bool
|
||
connected: bool
|
||
# Store last serial console lines for use
|
||
# of wait_for_console_text
|
||
last_lines: Queue = Queue()
|
||
|
||
def __repr__(self) -> str:
|
||
return f"<Machine '{self.name}'>"
|
||
|
||
def __init__(
|
||
self,
|
||
tmp_dir: Path,
|
||
start_command: StartCommand,
|
||
name: str = "machine",
|
||
keep_vm_state: bool = False,
|
||
allow_reboot: bool = False,
|
||
) -> None:
|
||
self.tmp_dir = tmp_dir
|
||
self.keep_vm_state = keep_vm_state
|
||
self.allow_reboot = allow_reboot
|
||
self.name = name
|
||
self.start_command = start_command
|
||
|
||
# set up directories
|
||
self.shared_dir = self.tmp_dir / "shared-xchg"
|
||
self.shared_dir.mkdir(mode=0o700, exist_ok=True)
|
||
|
||
self.state_dir = self.tmp_dir / f"vm-state-{self.name}"
|
||
self.monitor_path = self.state_dir / "monitor"
|
||
self.shell_path = self.state_dir / "shell"
|
||
if (not self.keep_vm_state) and self.state_dir.exists():
|
||
self.cleanup_statedir()
|
||
self.state_dir.mkdir(mode=0o700, exist_ok=True)
|
||
|
||
self.process = None
|
||
self.pid = None
|
||
self.monitor = None
|
||
self.shell = None
|
||
self.serial_thread = None
|
||
|
||
self.booted = False
|
||
self.connected = False
|
||
|
||
@staticmethod
|
||
def create_startcommand(args: Dict[str, str]) -> StartCommand:
|
||
rootlog.warning(
|
||
"Using legacy create_startcommand(),"
|
||
"please use proper nix test vm instrumentation, instead"
|
||
"to generate the appropriate nixos test vm qemu startup script"
|
||
)
|
||
hda = None
|
||
if args.get("hda"):
|
||
hda_arg: str = args.get("hda", "")
|
||
hda_arg_path: Path = Path(hda_arg)
|
||
hda = (hda_arg_path, args.get("hdaInterface", ""))
|
||
return LegacyStartCommand(
|
||
netBackendArgs=args.get("netBackendArgs"),
|
||
netFrontendArgs=args.get("netFrontendArgs"),
|
||
hda=hda,
|
||
cdrom=args.get("cdrom"),
|
||
usb=args.get("usb"),
|
||
bios=args.get("bios"),
|
||
qemuFlags=args.get("qemuFlags"),
|
||
)
|
||
|
||
def is_up(self) -> bool:
|
||
return self.booted and self.connected
|
||
|
||
def log(self, msg: str) -> None:
|
||
rootlog.log(msg, {"machine": self.name})
|
||
|
||
def log_serial(self, msg: str) -> None:
|
||
rootlog.log_serial(msg, self.name)
|
||
|
||
def nested(self, msg: str, attrs: Dict[str, str] = {}) -> _GeneratorContextManager:
|
||
my_attrs = {"machine": self.name}
|
||
my_attrs.update(attrs)
|
||
return rootlog.nested(msg, my_attrs)
|
||
|
||
def wait_for_monitor_prompt(self) -> str:
|
||
assert self.monitor is not None
|
||
answer = ""
|
||
while True:
|
||
undecoded_answer = self.monitor.recv(1024)
|
||
if not undecoded_answer:
|
||
break
|
||
answer += undecoded_answer.decode()
|
||
if answer.endswith("(qemu) "):
|
||
break
|
||
return answer
|
||
|
||
def send_monitor_command(self, command: str) -> str:
|
||
message = ("{}\n".format(command)).encode()
|
||
self.log("sending monitor command: {}".format(command))
|
||
assert self.monitor is not None
|
||
self.monitor.send(message)
|
||
return self.wait_for_monitor_prompt()
|
||
|
||
def wait_for_unit(self, unit: str, user: Optional[str] = None) -> None:
|
||
"""Wait for a systemd unit to get into "active" state.
|
||
Throws exceptions on "failed" and "inactive" states as well as
|
||
after timing out.
|
||
"""
|
||
|
||
def check_active(_: Any) -> bool:
|
||
info = self.get_unit_info(unit, user)
|
||
state = info["ActiveState"]
|
||
if state == "failed":
|
||
raise Exception('unit "{}" reached state "{}"'.format(unit, state))
|
||
|
||
if state == "inactive":
|
||
status, jobs = self.systemctl("list-jobs --full 2>&1", user)
|
||
if "No jobs" in jobs:
|
||
info = self.get_unit_info(unit, user)
|
||
if info["ActiveState"] == state:
|
||
raise Exception(
|
||
(
|
||
'unit "{}" is inactive and there ' "are no pending jobs"
|
||
).format(unit)
|
||
)
|
||
|
||
return state == "active"
|
||
|
||
retry(check_active)
|
||
|
||
def get_unit_info(self, unit: str, user: Optional[str] = None) -> Dict[str, str]:
|
||
status, lines = self.systemctl('--no-pager show "{}"'.format(unit), user)
|
||
if status != 0:
|
||
raise Exception(
|
||
'retrieving systemctl info for unit "{}" {} failed with exit code {}'.format(
|
||
unit, "" if user is None else 'under user "{}"'.format(user), status
|
||
)
|
||
)
|
||
|
||
line_pattern = re.compile(r"^([^=]+)=(.*)$")
|
||
|
||
def tuple_from_line(line: str) -> Tuple[str, str]:
|
||
match = line_pattern.match(line)
|
||
assert match is not None
|
||
return match[1], match[2]
|
||
|
||
return dict(
|
||
tuple_from_line(line)
|
||
for line in lines.split("\n")
|
||
if line_pattern.match(line)
|
||
)
|
||
|
||
def systemctl(self, q: str, user: Optional[str] = None) -> Tuple[int, str]:
|
||
if user is not None:
|
||
q = q.replace("'", "\\'")
|
||
return self.execute(
|
||
(
|
||
"su -l {} --shell /bin/sh -c "
|
||
"$'XDG_RUNTIME_DIR=/run/user/`id -u` "
|
||
"systemctl --user {}'"
|
||
).format(user, q)
|
||
)
|
||
return self.execute("systemctl {}".format(q))
|
||
|
||
def require_unit_state(self, unit: str, require_state: str = "active") -> None:
|
||
with self.nested(
|
||
"checking if unit ‘{}’ has reached state '{}'".format(unit, require_state)
|
||
):
|
||
info = self.get_unit_info(unit)
|
||
state = info["ActiveState"]
|
||
if state != require_state:
|
||
raise Exception(
|
||
"Expected unit ‘{}’ to to be in state ".format(unit)
|
||
+ "'{}' but it is in state ‘{}’".format(require_state, state)
|
||
)
|
||
|
||
def _next_newline_closed_block_from_shell(self) -> str:
|
||
assert self.shell
|
||
output_buffer = []
|
||
while True:
|
||
# This receives up to 4096 bytes from the socket
|
||
chunk = self.shell.recv(4096)
|
||
if not chunk:
|
||
# Probably a broken pipe, return the output we have
|
||
break
|
||
|
||
decoded = chunk.decode()
|
||
output_buffer += [decoded]
|
||
if decoded[-1] == "\n":
|
||
break
|
||
return "".join(output_buffer)
|
||
|
||
def execute(self, command: str, check_return: bool = True) -> Tuple[int, str]:
|
||
self.connect()
|
||
|
||
out_command = f"( set -euo pipefail; {command} ) | (base64 --wrap 0; echo)\n"
|
||
assert self.shell
|
||
self.shell.send(out_command.encode())
|
||
|
||
# Get the output
|
||
output = base64.b64decode(self._next_newline_closed_block_from_shell())
|
||
|
||
if not check_return:
|
||
return (-1, output.decode())
|
||
|
||
# Get the return code
|
||
self.shell.send("echo ${PIPESTATUS[0]}\n".encode())
|
||
rc = int(self._next_newline_closed_block_from_shell().strip())
|
||
|
||
return (rc, output.decode())
|
||
|
||
def shell_interact(self) -> None:
|
||
"""Allows you to interact with the guest shell
|
||
|
||
Should only be used during test development, not in the production test."""
|
||
self.connect()
|
||
self.log("Terminal is ready (there is no prompt):")
|
||
|
||
assert self.shell
|
||
subprocess.run(
|
||
["socat", "READLINE", f"FD:{self.shell.fileno()}"],
|
||
pass_fds=[self.shell.fileno()],
|
||
)
|
||
|
||
def succeed(self, *commands: str) -> str:
|
||
"""Execute each command and check that it succeeds."""
|
||
output = ""
|
||
for command in commands:
|
||
with self.nested("must succeed: {}".format(command)):
|
||
(status, out) = self.execute(command)
|
||
if status != 0:
|
||
self.log("output: {}".format(out))
|
||
raise Exception(
|
||
"command `{}` failed (exit code {})".format(command, status)
|
||
)
|
||
output += out
|
||
return output
|
||
|
||
def fail(self, *commands: str) -> str:
|
||
"""Execute each command and check that it fails."""
|
||
output = ""
|
||
for command in commands:
|
||
with self.nested("must fail: {}".format(command)):
|
||
(status, out) = self.execute(command)
|
||
if status == 0:
|
||
raise Exception(
|
||
"command `{}` unexpectedly succeeded".format(command)
|
||
)
|
||
output += out
|
||
return output
|
||
|
||
def wait_until_succeeds(self, command: str, timeout: int = 900) -> str:
|
||
"""Wait until a command returns success and return its output.
|
||
Throws an exception on timeout.
|
||
"""
|
||
output = ""
|
||
|
||
def check_success(_: Any) -> bool:
|
||
nonlocal output
|
||
status, output = self.execute(command)
|
||
return status == 0
|
||
|
||
with self.nested("waiting for success: {}".format(command)):
|
||
retry(check_success, timeout)
|
||
return output
|
||
|
||
def wait_until_fails(self, command: str) -> str:
|
||
"""Wait until a command returns failure.
|
||
Throws an exception on timeout.
|
||
"""
|
||
output = ""
|
||
|
||
def check_failure(_: Any) -> bool:
|
||
nonlocal output
|
||
status, output = self.execute(command)
|
||
return status != 0
|
||
|
||
with self.nested("waiting for failure: {}".format(command)):
|
||
retry(check_failure)
|
||
return output
|
||
|
||
def wait_for_shutdown(self) -> None:
|
||
if not self.booted:
|
||
return
|
||
|
||
with self.nested("waiting for the VM to power off"):
|
||
sys.stdout.flush()
|
||
assert self.process
|
||
self.process.wait()
|
||
|
||
self.pid = None
|
||
self.booted = False
|
||
self.connected = False
|
||
|
||
def get_tty_text(self, tty: str) -> str:
|
||
status, output = self.execute(
|
||
"fold -w$(stty -F /dev/tty{0} size | "
|
||
"awk '{{print $2}}') /dev/vcs{0}".format(tty)
|
||
)
|
||
return output
|
||
|
||
def wait_until_tty_matches(self, tty: str, regexp: str) -> None:
|
||
"""Wait until the visible output on the chosen TTY matches regular
|
||
expression. Throws an exception on timeout.
|
||
"""
|
||
matcher = re.compile(regexp)
|
||
|
||
def tty_matches(last: bool) -> bool:
|
||
text = self.get_tty_text(tty)
|
||
if last:
|
||
self.log(
|
||
f"Last chance to match /{regexp}/ on TTY{tty}, "
|
||
f"which currently contains: {text}"
|
||
)
|
||
return len(matcher.findall(text)) > 0
|
||
|
||
with self.nested("waiting for {} to appear on tty {}".format(regexp, tty)):
|
||
retry(tty_matches)
|
||
|
||
def send_chars(self, chars: List[str]) -> None:
|
||
with self.nested("sending keys ‘{}‘".format(chars)):
|
||
for char in chars:
|
||
self.send_key(char)
|
||
|
||
def wait_for_file(self, filename: str) -> None:
|
||
"""Waits until the file exists in machine's file system."""
|
||
|
||
def check_file(_: Any) -> bool:
|
||
status, _ = self.execute("test -e {}".format(filename))
|
||
return status == 0
|
||
|
||
with self.nested("waiting for file ‘{}‘".format(filename)):
|
||
retry(check_file)
|
||
|
||
def wait_for_open_port(self, port: int) -> None:
|
||
def port_is_open(_: Any) -> bool:
|
||
status, _ = self.execute("nc -z localhost {}".format(port))
|
||
return status == 0
|
||
|
||
with self.nested("waiting for TCP port {}".format(port)):
|
||
retry(port_is_open)
|
||
|
||
def wait_for_closed_port(self, port: int) -> None:
|
||
def port_is_closed(_: Any) -> bool:
|
||
status, _ = self.execute("nc -z localhost {}".format(port))
|
||
return status != 0
|
||
|
||
retry(port_is_closed)
|
||
|
||
def start_job(self, jobname: str, user: Optional[str] = None) -> Tuple[int, str]:
|
||
return self.systemctl("start {}".format(jobname), user)
|
||
|
||
def stop_job(self, jobname: str, user: Optional[str] = None) -> Tuple[int, str]:
|
||
return self.systemctl("stop {}".format(jobname), user)
|
||
|
||
def wait_for_job(self, jobname: str) -> None:
|
||
self.wait_for_unit(jobname)
|
||
|
||
def connect(self) -> None:
|
||
if self.connected:
|
||
return
|
||
|
||
with self.nested("waiting for the VM to finish booting"):
|
||
self.start()
|
||
|
||
assert self.shell
|
||
|
||
tic = time.time()
|
||
self.shell.recv(1024)
|
||
# TODO: Timeout
|
||
toc = time.time()
|
||
|
||
self.log("connected to guest root shell")
|
||
self.log("(connecting took {:.2f} seconds)".format(toc - tic))
|
||
self.connected = True
|
||
|
||
def screenshot(self, filename: str) -> None:
|
||
out_dir = os.environ.get("out", os.getcwd())
|
||
word_pattern = re.compile(r"^\w+$")
|
||
if word_pattern.match(filename):
|
||
filename = os.path.join(out_dir, "{}.png".format(filename))
|
||
tmp = "{}.ppm".format(filename)
|
||
|
||
with self.nested(
|
||
"making screenshot {}".format(filename),
|
||
{"image": os.path.basename(filename)},
|
||
):
|
||
self.send_monitor_command("screendump {}".format(tmp))
|
||
ret = subprocess.run("pnmtopng {} > {}".format(tmp, filename), shell=True)
|
||
os.unlink(tmp)
|
||
if ret.returncode != 0:
|
||
raise Exception("Cannot convert screenshot")
|
||
|
||
def copy_from_host_via_shell(self, source: str, target: str) -> None:
|
||
"""Copy a file from the host into the guest by piping it over the
|
||
shell into the destination file. Works without host-guest shared folder.
|
||
Prefer copy_from_host for whenever possible.
|
||
"""
|
||
with open(source, "rb") as fh:
|
||
content_b64 = base64.b64encode(fh.read()).decode()
|
||
self.succeed(
|
||
f"mkdir -p $(dirname {target})",
|
||
f"echo -n {content_b64} | base64 -d > {target}",
|
||
)
|
||
|
||
def copy_from_host(self, source: str, target: str) -> None:
|
||
"""Copy a file from the host into the guest via the `shared_dir` shared
|
||
among all the VMs (using a temporary directory).
|
||
"""
|
||
host_src = Path(source)
|
||
vm_target = Path(target)
|
||
with tempfile.TemporaryDirectory(dir=self.shared_dir) as shared_td:
|
||
shared_temp = Path(shared_td)
|
||
host_intermediate = shared_temp / host_src.name
|
||
vm_shared_temp = Path("/tmp/shared") / shared_temp.name
|
||
vm_intermediate = vm_shared_temp / host_src.name
|
||
|
||
self.succeed(make_command(["mkdir", "-p", vm_shared_temp]))
|
||
if host_src.is_dir():
|
||
shutil.copytree(host_src, host_intermediate)
|
||
else:
|
||
shutil.copy(host_src, host_intermediate)
|
||
self.succeed(make_command(["mkdir", "-p", vm_target.parent]))
|
||
self.succeed(make_command(["cp", "-r", vm_intermediate, vm_target]))
|
||
|
||
def copy_from_vm(self, source: str, target_dir: str = "") -> None:
|
||
"""Copy a file from the VM (specified by an in-VM source path) to a path
|
||
relative to `$out`. The file is copied via the `shared_dir` shared among
|
||
all the VMs (using a temporary directory).
|
||
"""
|
||
# Compute the source, target, and intermediate shared file names
|
||
out_dir = Path(os.environ.get("out", os.getcwd()))
|
||
vm_src = Path(source)
|
||
with tempfile.TemporaryDirectory(dir=self.shared_dir) as shared_td:
|
||
shared_temp = Path(shared_td)
|
||
vm_shared_temp = Path("/tmp/shared") / shared_temp.name
|
||
vm_intermediate = vm_shared_temp / vm_src.name
|
||
intermediate = shared_temp / vm_src.name
|
||
# Copy the file to the shared directory inside VM
|
||
self.succeed(make_command(["mkdir", "-p", vm_shared_temp]))
|
||
self.succeed(make_command(["cp", "-r", vm_src, vm_intermediate]))
|
||
abs_target = out_dir / target_dir / vm_src.name
|
||
abs_target.parent.mkdir(exist_ok=True, parents=True)
|
||
# Copy the file from the shared directory outside VM
|
||
if intermediate.is_dir():
|
||
shutil.copytree(intermediate, abs_target)
|
||
else:
|
||
shutil.copy(intermediate, abs_target)
|
||
|
||
def dump_tty_contents(self, tty: str) -> None:
|
||
"""Debugging: Dump the contents of the TTY<n>"""
|
||
self.execute("fold -w 80 /dev/vcs{} | systemd-cat".format(tty))
|
||
|
||
def _get_screen_text_variants(self, model_ids: Iterable[int]) -> List[str]:
|
||
with tempfile.TemporaryDirectory() as tmpdir:
|
||
screenshot_path = os.path.join(tmpdir, "ppm")
|
||
self.send_monitor_command(f"screendump {screenshot_path}")
|
||
return _perform_ocr_on_screenshot(screenshot_path, model_ids)
|
||
|
||
def get_screen_text_variants(self) -> List[str]:
|
||
return self._get_screen_text_variants([0, 1, 2])
|
||
|
||
def get_screen_text(self) -> str:
|
||
return self._get_screen_text_variants([2])[0]
|
||
|
||
def wait_for_text(self, regex: str) -> None:
|
||
def screen_matches(last: bool) -> bool:
|
||
variants = self.get_screen_text_variants()
|
||
for text in variants:
|
||
if re.search(regex, text) is not None:
|
||
return True
|
||
|
||
if last:
|
||
self.log("Last OCR attempt failed. Text was: {}".format(variants))
|
||
|
||
return False
|
||
|
||
with self.nested("waiting for {} to appear on screen".format(regex)):
|
||
retry(screen_matches)
|
||
|
||
def wait_for_console_text(self, regex: str) -> None:
|
||
self.log("waiting for {} to appear on console".format(regex))
|
||
# Buffer the console output, this is needed
|
||
# to match multiline regexes.
|
||
console = io.StringIO()
|
||
while True:
|
||
try:
|
||
console.write(self.last_lines.get())
|
||
except queue.Empty:
|
||
self.sleep(1)
|
||
continue
|
||
console.seek(0)
|
||
matches = re.search(regex, console.read())
|
||
if matches is not None:
|
||
return
|
||
|
||
def send_key(self, key: str) -> None:
|
||
key = CHAR_TO_KEY.get(key, key)
|
||
self.send_monitor_command("sendkey {}".format(key))
|
||
|
||
def start(self) -> None:
|
||
if self.booted:
|
||
return
|
||
|
||
self.log("starting vm")
|
||
|
||
def clear(path: Path) -> Path:
|
||
if path.exists():
|
||
path.unlink()
|
||
return path
|
||
|
||
def create_socket(path: Path) -> socket.socket:
|
||
s = socket.socket(family=socket.AF_UNIX, type=socket.SOCK_STREAM)
|
||
s.bind(str(path))
|
||
s.listen(1)
|
||
return s
|
||
|
||
monitor_socket = create_socket(clear(self.monitor_path))
|
||
shell_socket = create_socket(clear(self.shell_path))
|
||
self.process = self.start_command.run(
|
||
self.state_dir,
|
||
self.shared_dir,
|
||
self.monitor_path,
|
||
self.shell_path,
|
||
)
|
||
self.monitor, _ = monitor_socket.accept()
|
||
self.shell, _ = shell_socket.accept()
|
||
|
||
# Store last serial console lines for use
|
||
# of wait_for_console_text
|
||
self.last_lines: Queue = Queue()
|
||
|
||
def process_serial_output() -> None:
|
||
assert self.process
|
||
assert self.process.stdout
|
||
for _line in self.process.stdout:
|
||
# Ignore undecodable bytes that may occur in boot menus
|
||
line = _line.decode(errors="ignore").replace("\r", "").rstrip()
|
||
self.last_lines.put(line)
|
||
self.log_serial(line)
|
||
|
||
self.serial_thread = threading.Thread(target=process_serial_output)
|
||
self.serial_thread.start()
|
||
|
||
self.wait_for_monitor_prompt()
|
||
|
||
self.pid = self.process.pid
|
||
self.booted = True
|
||
|
||
self.log("QEMU running (pid {})".format(self.pid))
|
||
|
||
def cleanup_statedir(self) -> None:
|
||
shutil.rmtree(self.state_dir)
|
||
rootlog.log(f"deleting VM state directory {self.state_dir}")
|
||
rootlog.log("if you want to keep the VM state, pass --keep-vm-state")
|
||
|
||
def shutdown(self) -> None:
|
||
if not self.booted:
|
||
return
|
||
|
||
assert self.shell
|
||
self.shell.send("poweroff\n".encode())
|
||
self.wait_for_shutdown()
|
||
|
||
def crash(self) -> None:
|
||
if not self.booted:
|
||
return
|
||
|
||
self.log("forced crash")
|
||
self.send_monitor_command("quit")
|
||
self.wait_for_shutdown()
|
||
|
||
def wait_for_x(self) -> None:
|
||
"""Wait until it is possible to connect to the X server. Note that
|
||
testing the existence of /tmp/.X11-unix/X0 is insufficient.
|
||
"""
|
||
|
||
def check_x(_: Any) -> bool:
|
||
cmd = (
|
||
"journalctl -b SYSLOG_IDENTIFIER=systemd | "
|
||
+ 'grep "Reached target Current graphical"'
|
||
)
|
||
status, _ = self.execute(cmd)
|
||
if status != 0:
|
||
return False
|
||
status, _ = self.execute("[ -e /tmp/.X11-unix/X0 ]")
|
||
return status == 0
|
||
|
||
with self.nested("waiting for the X11 server"):
|
||
retry(check_x)
|
||
|
||
def get_window_names(self) -> List[str]:
|
||
return self.succeed(
|
||
r"xwininfo -root -tree | sed 's/.*0x[0-9a-f]* \"\([^\"]*\)\".*/\1/; t; d'"
|
||
).splitlines()
|
||
|
||
def wait_for_window(self, regexp: str) -> None:
|
||
pattern = re.compile(regexp)
|
||
|
||
def window_is_visible(last_try: bool) -> bool:
|
||
names = self.get_window_names()
|
||
if last_try:
|
||
self.log(
|
||
"Last chance to match {} on the window list,".format(regexp)
|
||
+ " which currently contains: "
|
||
+ ", ".join(names)
|
||
)
|
||
return any(pattern.search(name) for name in names)
|
||
|
||
with self.nested("Waiting for a window to appear"):
|
||
retry(window_is_visible)
|
||
|
||
def sleep(self, secs: int) -> None:
|
||
# We want to sleep in *guest* time, not *host* time.
|
||
self.succeed(f"sleep {secs}")
|
||
|
||
def forward_port(self, host_port: int = 8080, guest_port: int = 80) -> None:
|
||
"""Forward a TCP port on the host to a TCP port on the guest.
|
||
Useful during interactive testing.
|
||
"""
|
||
self.send_monitor_command(
|
||
"hostfwd_add tcp::{}-:{}".format(host_port, guest_port)
|
||
)
|
||
|
||
def block(self) -> None:
|
||
"""Make the machine unreachable by shutting down eth1 (the multicast
|
||
interface used to talk to the other VMs). We keep eth0 up so that
|
||
the test driver can continue to talk to the machine.
|
||
"""
|
||
self.send_monitor_command("set_link virtio-net-pci.1 off")
|
||
|
||
def unblock(self) -> None:
|
||
"""Make the machine reachable."""
|
||
self.send_monitor_command("set_link virtio-net-pci.1 on")
|
||
|
||
def release(self) -> None:
|
||
if self.pid is None:
|
||
return
|
||
rootlog.info(f"kill machine (pid {self.pid})")
|
||
assert self.process
|
||
assert self.shell
|
||
assert self.monitor
|
||
assert self.serial_thread
|
||
|
||
self.process.terminate()
|
||
self.shell.close()
|
||
self.monitor.close()
|
||
self.serial_thread.join()
|
||
|
||
|
||
class VLan:
|
||
"""This class handles a VLAN that the run-vm scripts identify via its
|
||
number handles. The network's lifetime equals the object's lifetime.
|
||
"""
|
||
|
||
nr: int
|
||
socket_dir: Path
|
||
|
||
process: subprocess.Popen
|
||
pid: int
|
||
fd: io.TextIOBase
|
||
|
||
def __repr__(self) -> str:
|
||
return f"<Vlan Nr. {self.nr}>"
|
||
|
||
def __init__(self, nr: int, tmp_dir: Path):
|
||
self.nr = nr
|
||
self.socket_dir = tmp_dir / f"vde{self.nr}.ctl"
|
||
|
||
# TODO: don't side-effect environment here
|
||
os.environ[f"QEMU_VDE_SOCKET_{self.nr}"] = str(self.socket_dir)
|
||
|
||
rootlog.info("start vlan")
|
||
pty_master, pty_slave = pty.openpty()
|
||
|
||
self.process = subprocess.Popen(
|
||
["vde_switch", "-s", self.socket_dir, "--dirmode", "0700"],
|
||
stdin=pty_slave,
|
||
stdout=subprocess.PIPE,
|
||
stderr=subprocess.PIPE,
|
||
shell=False,
|
||
)
|
||
self.pid = self.process.pid
|
||
self.fd = os.fdopen(pty_master, "w")
|
||
self.fd.write("version\n")
|
||
|
||
# TODO: perl version checks if this can be read from
|
||
# an if not, dies. we could hang here forever. Fix it.
|
||
assert self.process.stdout is not None
|
||
self.process.stdout.readline()
|
||
if not (self.socket_dir / "ctl").exists():
|
||
rootlog.error("cannot start vde_switch")
|
||
|
||
rootlog.info(f"running vlan (pid {self.pid})")
|
||
|
||
def __del__(self) -> None:
|
||
rootlog.info(f"kill vlan (pid {self.pid})")
|
||
self.fd.close()
|
||
self.process.terminate()
|
||
|
||
|
||
class Driver:
|
||
"""A handle to the driver that sets up the environment
|
||
and runs the tests"""
|
||
|
||
tests: str
|
||
vlans: List[VLan]
|
||
machines: List[Machine]
|
||
|
||
def __init__(
|
||
self,
|
||
start_scripts: List[str],
|
||
vlans: List[int],
|
||
tests: str,
|
||
keep_vm_state: bool = False,
|
||
):
|
||
self.tests = tests
|
||
|
||
tmp_dir = Path(os.environ.get("TMPDIR", tempfile.gettempdir()))
|
||
tmp_dir.mkdir(mode=0o700, exist_ok=True)
|
||
|
||
with rootlog.nested("start all VLans"):
|
||
self.vlans = [VLan(nr, tmp_dir) for nr in vlans]
|
||
|
||
def cmd(scripts: List[str]) -> Iterator[NixStartScript]:
|
||
for s in scripts:
|
||
yield NixStartScript(s)
|
||
|
||
self.machines = [
|
||
Machine(
|
||
start_command=cmd,
|
||
keep_vm_state=keep_vm_state,
|
||
name=cmd.machine_name,
|
||
tmp_dir=tmp_dir,
|
||
)
|
||
for cmd in cmd(start_scripts)
|
||
]
|
||
|
||
def __enter__(self) -> "Driver":
|
||
return self
|
||
|
||
def __exit__(self, *_: Any) -> None:
|
||
with rootlog.nested("cleanup"):
|
||
for machine in self.machines:
|
||
machine.release()
|
||
|
||
def subtest(self, name: str) -> Iterator[None]:
|
||
"""Group logs under a given test name"""
|
||
with rootlog.nested(name):
|
||
try:
|
||
yield
|
||
return True
|
||
except Exception as e:
|
||
rootlog.error(f'Test "{name}" failed with error: "{e}"')
|
||
raise e
|
||
|
||
def test_symbols(self) -> Dict[str, Any]:
|
||
@contextmanager
|
||
def subtest(name: str) -> Iterator[None]:
|
||
return self.subtest(name)
|
||
|
||
general_symbols = dict(
|
||
start_all=self.start_all,
|
||
test_script=self.test_script,
|
||
machines=self.machines,
|
||
vlans=self.vlans,
|
||
driver=self,
|
||
log=rootlog,
|
||
os=os,
|
||
create_machine=self.create_machine,
|
||
subtest=subtest,
|
||
run_tests=self.run_tests,
|
||
join_all=self.join_all,
|
||
retry=retry,
|
||
serial_stdout_off=self.serial_stdout_off,
|
||
serial_stdout_on=self.serial_stdout_on,
|
||
Machine=Machine, # for typing
|
||
)
|
||
machine_symbols = {m.name: m for m in self.machines}
|
||
# If there's exactly one machine, make it available under the name
|
||
# "machine", even if it's not called that.
|
||
if len(self.machines) == 1:
|
||
(machine_symbols["machine"],) = self.machines
|
||
vlan_symbols = {
|
||
f"vlan{v.nr}": self.vlans[idx] for idx, v in enumerate(self.vlans)
|
||
}
|
||
print(
|
||
"additionally exposed symbols:\n "
|
||
+ ", ".join(map(lambda m: m.name, self.machines))
|
||
+ ",\n "
|
||
+ ", ".join(map(lambda v: f"vlan{v.nr}", self.vlans))
|
||
+ ",\n "
|
||
+ ", ".join(list(general_symbols.keys()))
|
||
)
|
||
return {**general_symbols, **machine_symbols, **vlan_symbols}
|
||
|
||
def test_script(self) -> None:
|
||
"""Run the test script"""
|
||
with rootlog.nested("run the VM test script"):
|
||
symbols = self.test_symbols() # call eagerly
|
||
exec(self.tests, symbols, None)
|
||
|
||
def run_tests(self) -> None:
|
||
"""Run the test script (for non-interactive test runs)"""
|
||
self.test_script()
|
||
# TODO: Collect coverage data
|
||
for machine in self.machines:
|
||
if machine.is_up():
|
||
machine.execute("sync")
|
||
|
||
def start_all(self) -> None:
|
||
"""Start all machines"""
|
||
with rootlog.nested("start all VMs"):
|
||
for machine in self.machines:
|
||
machine.start()
|
||
|
||
def join_all(self) -> None:
|
||
"""Wait for all machines to shut down"""
|
||
with rootlog.nested("wait for all VMs to finish"):
|
||
for machine in self.machines:
|
||
machine.wait_for_shutdown()
|
||
|
||
def create_machine(self, args: Dict[str, Any]) -> Machine:
|
||
rootlog.warning(
|
||
"Using legacy create_machine(), please instantiate the"
|
||
"Machine class directly, instead"
|
||
)
|
||
tmp_dir = Path(os.environ.get("TMPDIR", tempfile.gettempdir()))
|
||
tmp_dir.mkdir(mode=0o700, exist_ok=True)
|
||
|
||
if args.get("startCommand"):
|
||
start_command: str = args.get("startCommand", "")
|
||
cmd = NixStartScript(start_command)
|
||
name = args.get("name", cmd.machine_name)
|
||
else:
|
||
cmd = Machine.create_startcommand(args) # type: ignore
|
||
name = args.get("name", "machine")
|
||
|
||
return Machine(
|
||
tmp_dir=tmp_dir,
|
||
start_command=cmd,
|
||
name=name,
|
||
keep_vm_state=args.get("keep_vm_state", False),
|
||
allow_reboot=args.get("allow_reboot", False),
|
||
)
|
||
|
||
def serial_stdout_on(self) -> None:
|
||
rootlog._print_serial_logs = True
|
||
|
||
def serial_stdout_off(self) -> None:
|
||
rootlog._print_serial_logs = False
|
||
|
||
|
||
class EnvDefault(argparse.Action):
|
||
"""An argpars Action that takes values from the specified
|
||
environment variable as the flags default value.
|
||
"""
|
||
|
||
def __init__(self, envvar, required=False, default=None, nargs=None, **kwargs): # type: ignore
|
||
if not default and envvar:
|
||
if envvar in os.environ:
|
||
if nargs is not None and (nargs.isdigit() or nargs in ["*", "+"]):
|
||
default = os.environ[envvar].split()
|
||
else:
|
||
default = os.environ[envvar]
|
||
kwargs["help"] = (
|
||
kwargs["help"] + f" (default from environment: {default})"
|
||
)
|
||
if required and default:
|
||
required = False
|
||
super(EnvDefault, self).__init__(
|
||
default=default, required=required, nargs=nargs, **kwargs
|
||
)
|
||
|
||
def __call__(self, parser, namespace, values, option_string=None): # type: ignore
|
||
setattr(namespace, self.dest, values)
|
||
|
||
|
||
if __name__ == "__main__":
|
||
arg_parser = argparse.ArgumentParser(prog="nixos-test-driver")
|
||
arg_parser.add_argument(
|
||
"-K",
|
||
"--keep-vm-state",
|
||
help="re-use a VM state coming from a previous run",
|
||
action="store_true",
|
||
)
|
||
arg_parser.add_argument(
|
||
"-I",
|
||
"--interactive",
|
||
help="drop into a python repl and run the tests interactively",
|
||
action="store_true",
|
||
)
|
||
arg_parser.add_argument(
|
||
"--start-scripts",
|
||
metavar="START-SCRIPT",
|
||
action=EnvDefault,
|
||
envvar="startScripts",
|
||
nargs="*",
|
||
help="start scripts for participating virtual machines",
|
||
)
|
||
arg_parser.add_argument(
|
||
"--vlans",
|
||
metavar="VLAN",
|
||
action=EnvDefault,
|
||
envvar="vlans",
|
||
nargs="*",
|
||
help="vlans to span by the driver",
|
||
)
|
||
arg_parser.add_argument(
|
||
"testscript",
|
||
action=EnvDefault,
|
||
envvar="testScript",
|
||
help="the test script to run",
|
||
type=Path,
|
||
)
|
||
|
||
args = arg_parser.parse_args()
|
||
|
||
if not args.keep_vm_state:
|
||
rootlog.info("Machine state will be reset. To keep it, pass --keep-vm-state")
|
||
|
||
with Driver(
|
||
args.start_scripts, args.vlans, args.testscript.read_text(), args.keep_vm_state
|
||
) as driver:
|
||
if args.interactive:
|
||
ptpython.repl.embed(driver.test_symbols(), {})
|
||
else:
|
||
tic = time.time()
|
||
driver.run_tests()
|
||
toc = time.time()
|
||
rootlog.info(f"test script finished in {(toc-tic):.2f}s")
|