75 lines
2.2 KiB
Python
75 lines
2.2 KiB
Python
from functools import wraps
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from pathlib import Path
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from re import compile
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from subprocess import run
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from typing import Callable, Dict, Iterable, List, Mapping, ParamSpec, Tuple, TypeVar
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WORKDIR = Path.cwd()
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PROJECT_DIR = Path(__file__).resolve().absolute().parent.relative_to(WORKDIR)
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OUTPUT_FILE = PROJECT_DIR / "Lecture.pdf"
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idRegex = compile(r"^(\d+)\..+$")
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def get_id(file: Path):
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matches = idRegex.search(file.name)
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if matches is None:
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print(f"WARNING: File '{file.name}' hasn't got an id in the filename!")
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return None
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return int(matches.group(1))
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def not_output_file(file: Path):
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global OUTPUT_FILE
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return file != OUTPUT_FILE
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T = TypeVar("T")
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Params = ParamSpec("Params")
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def get_sequential(f: Callable[Params, Mapping[int, T]]) -> Callable[Params, List[T]]:
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@wraps(f)
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def wrapper(*args: Params.args, **kwargs: Params.kwargs):
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items = f(*args, **kwargs)
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def get_or_raise(i: int):
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item = items.get(i)
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if item is None:
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raise Exception(f"Expected Item with index {i}, but it was not found!")
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return item
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return list(map(get_or_raise, range(len(items))))
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return wrapper
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def only_unique_ids(f: Callable[Params, Iterable[Tuple[int, T]]]) -> Callable[Params, Dict[int, T]]:
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@wraps(f)
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def wrapper(*args: Params.args, **kwargs: Params.kwargs):
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items: Dict[int, T] = dict()
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for uid, pdf in f(*args, **kwargs):
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existing = items.get(uid)
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if existing is not None:
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raise ValueError(f"Got item '{pdf}' with id {uid}, but '{existing}' already has that id!")
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items[uid] = pdf
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return items
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return wrapper
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@get_sequential
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@only_unique_ids
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def get_files(path: Path):
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global OUTPUT_FILE
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files = path.rglob("*.pdf")
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for file in files:
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if file == OUTPUT_FILE: continue
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number = get_id(file)
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if number is None: continue
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yield number, file
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def main():
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pdfs = get_files(PROJECT_DIR)
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for pdf in pdfs:
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print(f"Adding file {pdf.name}")
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cmd = ["pdftk"]
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cmd.extend(map(str, pdfs))
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cmd.append("cat")
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cmd.append("output")
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cmd.append(str(OUTPUT_FILE))
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run(cmd)
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if __name__ == "__main__":
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main()
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