Added Full lecture build script

lecture/build_lecture.py

@@ -0,0 +1,74 @@
+from functools import wraps
+from pathlib import Path
+from re import compile
+from subprocess import run
+from typing import Callable, Dict, Iterable, List, Mapping, ParamSpec, Tuple, TypeVar
+
+
+WORKDIR = Path.cwd()
+PROJECT_DIR = Path(__file__).resolve().absolute().parent.relative_to(WORKDIR)
+OUTPUT_FILE = PROJECT_DIR / "Lecture.pdf"
+idRegex = compile(r"^(\d+)\..+$")
+
+def get_id(file: Path):
+    matches = idRegex.search(file.name)
+    if matches is None:
+        print(f"WARNING: File '{file.name}' hasn't got an id in the filename!")
+        return None
+    return int(matches.group(1))
+
+def not_output_file(file: Path):
+    global OUTPUT_FILE
+    return file != OUTPUT_FILE
+
+T = TypeVar("T")
+Params = ParamSpec("Params")
+
+def get_sequential(f: Callable[Params, Mapping[int, T]]) -> Callable[Params, List[T]]:
+    @wraps(f)
+    def wrapper(*args: Params.args, **kwargs: Params.kwargs):
+        items = f(*args, **kwargs)
+        def get_or_raise(i: int):
+            item = items.get(i)
+            if item is None:
+                raise Exception(f"Expected Item with index {i}, but it was not found!")
+            return item
+        return list(map(get_or_raise, range(len(items))))
+    return wrapper
+
+def only_unique_ids(f: Callable[Params, Iterable[Tuple[int, T]]]) -> Callable[Params, Dict[int, T]]:
+    @wraps(f)
+    def wrapper(*args: Params.args, **kwargs: Params.kwargs):
+        items: Dict[int, T] = dict()
+        for uid, pdf in f(*args, **kwargs):
+            existing = items.get(uid)
+            if existing is not None:
+                raise ValueError(f"Got item '{pdf}' with id {uid}, but '{existing}' already has that id!")
+            items[uid] = pdf
+        return items
+    return wrapper
+
+@get_sequential
+@only_unique_ids
+def get_files(path: Path):
+    global OUTPUT_FILE
+    files = path.rglob("*.pdf")
+    for file in files:
+        if file == OUTPUT_FILE: continue
+        number = get_id(file)
+        if number is None: continue
+        yield number, file
+
+def main():
+    pdfs = get_files(PROJECT_DIR)
+    for pdf in pdfs:
+        print(f"Adding file {pdf.name}")
+    cmd = ["pdftk"]
+    cmd.extend(map(str, pdfs))
+    cmd.append("cat")
+    cmd.append("output")
+    cmd.append(str(OUTPUT_FILE))
+    run(cmd)
+
+if __name__ == "__main__":
+    main()