wip

aoc/cli.py

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+import argparse
+import datetime
+
+
+def get_latest_event_year() -> int:
+    now = datetime.datetime.now()
+    year = now.year
+
+    if now.month < 12:
+        year -= 1
+
+    return year
+
+
+def argument_parser() -> argparse.ArgumentParser:
+    parser = argparse.ArgumentParser(description="aoc")
+
+    subcli = parser.add_subparsers(title="command", required=True, dest="command")
+
+    solve = subcli.add_parser("solve", help="solve a given day's puzzle")
+    solve.add_argument(
+        "-e",
+        "--example",
+        action="store_true",
+        required=False,
+        help="use example input file instead of real input file",
+    )
+    solve.add_argument(
+        "-y",
+        "--year",
+        type=int,
+        required=False,
+        help="year of the puzzle (default: current year)",
+        default=get_latest_event_year(),
+    )
+    solve.add_argument("day", type=int, help="day of the puzzle (1-25)")
+
+    create = subcli.add_parser(
+        "create", help="create template and input files for a given day's puzzle"
+    )
+    create.add_argument(
+        "-y",
+        "--year",
+        type=int,
+        required=False,
+        help="year of the puzzle (default: current year)",
+        default=get_latest_event_year(),
+    )
+    create.add_argument("day", type=int, help="day of the puzzle (1-25)")
+
+    download = subcli.add_parser(
+        "download", help="download input file for a given day's puzzle"
+    )
+    download.add_argument(
+        "-f",
+        "--force",
+        action="store_true",
+        required=False,
+        help="force re-download even if input file already exists",
+    )
+    download.add_argument(
+        "-y",
+        "--year",
+        type=int,
+        required=False,
+        help="year of the puzzle (default: current year)",
+        default=get_latest_event_year(),
+    )
+    download.add_argument("day", type=int, help="day of the puzzle (1-25)")
+
+    return parser

aoc/exceptions.py

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+class AocError(Exception):
+    pass

aoc/input_file.py

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+import requests
+import pathlib
+
+
+from aoc import exceptions
+
+
+def download(year: int, day: int, session_token: str | None) -> bytes:
+    url = f"https://adventofcode.com/{year}/day/{day}/input"
+
+    cookies = {}
+    if session_token is not None:
+        cookies["session"] = session_token
+
+    response = requests.get(url, cookies=cookies)
+
+    if response.status_code != 200:
+        raise exceptions.AocError(
+            f"failed to fetch input file {year}/{day:02} (http:{response.status_code})"
+            " - is AOC_SESSION_TOKEN environment variable set?"
+        )
+
+    return response.content
+
+
+def create_input_file(
+    year: int,
+    day: int,
+    session_token: str | None,
+    path_base: pathlib.Path,
+    force: bool = False,
+    exist_ok: bool = False,
+):
+    path = path_base / str(year) / f"{day:02}.txt"
+    path.parent.mkdir(parents=True, exist_ok=True)
+
+    if path.exists() and exist_ok:
+        return
+
+    if path.exists() and not path.stat().st_size == 0 and not force:
+        raise exceptions.AocError(f"input file {path} already exists")
+
+    input_data = download(year, day, session_token)
+    with open(path, "wb") as f:
+        f.write(input_data)
+
+
+def get(
+    year: int,
+    day: int,
+    session_token: str | None,
+    path_base: pathlib.Path,
+) -> str:
+    path = path_base / str(year) / f"{day:02}.txt"
+    path.parent.mkdir(parents=True, exist_ok=True)
+
+    create_input_file(year, day, session_token, path_base, exist_ok=True)
+
+    with open(path) as f:
+        return f.read()
+
+
+def _write_file_if_not_exists(
+    path: pathlib.Path, exist_ok: bool = False, data: bytes | None = None
+) -> None:
+    path.parent.mkdir(parents=True, exist_ok=True)
+
+    if path.exists() and not exist_ok:
+        raise exceptions.AocError(f"{path} already exists")
+
+    path.touch()
+
+    if data is None:
+        return
+
+    with open(path, "wb") as f:
+        f.write(data)
+
+
+_CREATE_TEMPLATE: bytes = b"""\
+from typing import Any
+
+def part_1(input_data: str) -> Any:
+    # your part 1 solution here
+    return None
+
+def part_2(input_data: str) -> Any:
+    # your part 2 solution here
+    return None
+
+# alternatively you can implement a "two in one solution" like this
+# part_1 and part_2 must be removed or commented out in this case
+# if tuple or list is returned elements will be printed on separate lines
+# def part_1_2(input_data) -> Any: 
+#     return None
+"""
+
+
+def create(
+    year: int,
+    day: int,
+    solution_base: pathlib.Path,
+    input_base: pathlib.Path,
+    example_base: pathlib.Path,
+) -> None:
+    year_path = solution_base / f"year_{year}"
+
+    year_path.mkdir(parents=True, exist_ok=True)
+    _write_file_if_not_exists(year_path / "__init__.py", exist_ok=True)
+    _write_file_if_not_exists(year_path / f"day_{day:02}.py", data=_CREATE_TEMPLATE)
+
+    _write_file_if_not_exists(input_base / str(year) / f"{day:02}.txt")
+    _write_file_if_not_exists(example_base / str(year) / f"{day:02}.txt")

aoc/run.py

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+import importlib.util
+import pathlib
+from aoc import exceptions
+from typing import Any, Callable
+import time
+
+
+_ANSI_ITALIC: str = "\x1b[3m"
+_ANSI_BOLD: str = "\x1b[1m"
+_ANSI_RESET: str = "\x1b[0m"
+
+
+def _pprint_ns(ns: int) -> str:
+    if ns >= 1_000_000_000:
+        s = ns / 1_000_000_000
+        return f"{s:.2f}s"
+    elif ns >= 1_000_000:
+        ms = ns / 1_000_000
+        return f"{ms:.2f}ms"
+    elif ns >= 1_000:
+        us = ns / 1_000
+        return f"{us:.2f}µs"
+    else:
+        return f"{ns}ns"
+
+
+def _pprint_result(
+    year: int, day: int, part: int | str, result: Any, duration_ns: int
+) -> None:
+    part = f"{_ANSI_BOLD}{year}/{day:02}/{part}{_ANSI_RESET}"
+
+    if result is None:
+        solved = f"{_ANSI_ITALIC}(unsolved){_ANSI_RESET}"
+        print(f"{part}: {solved}")
+    else:
+        if isinstance(result, list) or isinstance(result, tuple):
+            result = "\n".join(str(r) for r in result)
+        solved = f"{_ANSI_ITALIC}(elapsed: {_pprint_ns(duration_ns)}){_ANSI_RESET}"
+        print(f"{part}: {solved}\n{result}")
+
+
+def _run_func(
+    f: Callable[[str], Any], year: int, day: int, part: int | str, input_data: str
+) -> None:
+    t_1 = time.perf_counter_ns()
+    result = f(input_data)
+    t_2 = time.perf_counter_ns()
+
+    _pprint_result(year, day, part, result, t_2 - t_1)
+
+
+def run_day(year: int, day: int, input_data: str, path_base: pathlib.Path) -> None:
+    try:
+        module_path = path_base / f"year_{year}" / f"day_{day:02}.py"
+        spec = importlib.util.spec_from_file_location(
+            f"year_{year}.day_{day:02}", module_path
+        )
+        if spec is None or spec.loader is None:
+            raise exceptions.AocError()
+        solution_module = importlib.util.module_from_spec(spec)
+        spec.loader.exec_module(solution_module)
+    except (ModuleNotFoundError, exceptions.AocError) as e:
+        raise exceptions.AocError(
+            f"solution module for {year}/{day:02} not found: run 'python main.py create --year {year} {day}'"
+        ) from e
+
+    p_1 = getattr(solution_module, "part_1", None)
+    p_2 = getattr(solution_module, "part_2", None)
+
+    if p_1 is not None and p_2 is not None:
+        _run_func(p_1, year, day, 1, input_data)
+        _run_func(p_2, year, day, 2, input_data)
+        return
+
+    p_1_2 = getattr(solution_module, "part_1_2", None)
+
+    if p_1_2 is not None:
+        _run_func(p_1_2, year, day, "1&2", input_data)
+        return
+
+    raise exceptions.AocError(
+        f"{year}/{day:02} must define part_1 and part_2 or part_1_2"
+    )