Use argparse for command line.

aoc_lube/__init__.py

@@ -4,7 +4,7 @@
 import subprocess
 import time
 import webbrowser
-from datetime import datetime, timedelta, timezone
+from datetime import date, datetime, timedelta, timezone
 from pathlib import Path
 from typing import Callable, Literal
 
@@ -62,24 +62,23 @@
     )
 
 
-def setup_dir(year: int | None = None, template: str | Path | None = None) -> None:
+def setup_dir(year: int | None = None, template: Path | None = None) -> None:
     r"""Run once to setup directory with templates for daily solutions.
 
-    A file or text can be provided as a template. The template must be a format
-    string with `year` and `day` keyword arguments, e.g.::
-
-        "import aoc_lube\ntodays_input = aoc_lube.fetch({year}, {day})"
-
-    If no template is provided, the default one is used instead.
+    A file can be provided as a template. The file's text should be able to be formatted
+    with `year` and `day` keyword arguments. See `code_template.txt` (the default
+    template) as an example.
     """
+    if year is None:
+        year = date.today().year
+
     if template is None:
         template = TEMPLATE_FILE.read_text()
-    elif isinstance(template, Path):
+    else:
         template = template.read_text()
 
     for day in range(1, 26):
         file = Path(f"day_{day:02}.py")
-
         if not file.exists():
             file.write_text(template.format(year=year, day=day))
 

aoc_lube/__main__.py

@@ -1,17 +1,16 @@
-"""Setup directory from command line with `python -m aoc_lube [YYYY]`."""
-import datetime
-import sys
+"""Setup directory from command line with
+`python -m aoc_lube [-y YEAR] [-t TEMPLATE]`.
+"""
+import argparse
+from pathlib import Path
 
 from . import setup_dir
 
-try:
-    _, year, *rest = sys.argv
-except ValueError:
-    setup_dir(datetime.date.today().year)
-else:
-    if not year.isdigit():
-        print(f"What is year {year}?")
-    elif rest:
-        print(f"Extra argument(s) not recognized: {rest}")
-    else:
-        setup_dir(int(year))
+parser = argparse.ArgumentParser(
+    prog="python -m aoc_lube", description="Setup a directory for Advent of Code."
+)
+parser.add_argument("-y", "--year", help="Advent of Code year.", default=None)
+parser.add_argument("-t", "--template", help="A code template file.", default=None)
+args = parser.parse_args()
+
+setup_dir(args.year, args.template if args.template is None else Path(args.template))