Move alembic.ini inside Python package

Before this, it was not shipped with the sdist or wheel and thus migrations were
unavailable for package-based installs.

pyproject.toml

@@ -57,6 +57,7 @@ migrate = "flask -A schilder2000 alembic upgrade head"
 includes = [
     "schilder2000/**/*.py",
     "schilder2000/templates",
+    "schilder2000/migrations",
     # Referenced files in manifest.json included via pdm_build.py
 ]
 

schilder2000/cli.py

 import sys
+import os
 from os.path import basename
+from pathlib import Path
 
 import click
 from flask.cli import with_appcontext
@@ -13,6 +15,8 @@ from alembic import config
 @with_appcontext
 def alembic(argv):
     """Wrap the alembic CLI tool."""
+    configfile = Path(__file__).parent / "migrations" / "alembic.ini"
+    os.environ.setdefault("ALEMBIC_CONFIG", str(configfile))
     prog = " ".join([basename(sys.argv[0]), sys.argv[1]])
     cli = config.CommandLine(prog=prog)
     cli.main(argv=argv)

alembic.ini → schilder2000/migrations/alembic.ini

 [alembic]
-script_location = schilder2000/migrations
+script_location = %(here)s
 
 [post_write_hooks]
 hooks = ruff ruff_format