Redirects for Datasette#

I made some changes to my https://til.simonwillison.net/ site that resulted in cleaner URL designs, so I needed to setup some redirects. I configured the redirects using a one-off Datasette plugin called redirects.py which I dropped into the plugins/ directory for the Datasette instance:

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from datasette import hookimpl
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from datasette.utils.asgi import Response
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@hookimpl
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def register_routes():
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    return (
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        (r"^/til/til/(?P<topic>[^_]+)_(?P<slug>[^\.]+)\.md$", lambda request: Response.redirect(
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            "/{topic}/{slug}".format(**request.url_vars), status=301
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        )),
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        ("^/til/feed.atom$", lambda: Response.redirect("/tils/feed.atom", status=301)),
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        (
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            "^/til/search$",
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            lambda request: Response.redirect(
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                "/tils/search"
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                + (("?" + request.query_string) if request.query_string else ""),
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                status=301,
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            ),
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        ),
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    )