add initial support for single page repositories (sources)

[abn]

This change allows users to make use of find-links style single page
sources that do not present a PEP 503 simple API repository.

Resolves: #5516

Example Configuration

[[tool.poetry.source]]
name = "jax"
url = "https://storage.googleapis.com/jax-releases/jax_releases.html"

Testing

Using pipx

pipx install --suffix=@5517 'poetry @ git+https://github.com/python-poetry/poetry.git@refs/pull/5517/head'

Using a container (podman | docker)

podman run --rm -i --entrypoint bash docker.io/python:3.10 <<EOF
set -xe
python -m pip install -q git+https://github.com/python-poetry/poetry.git@refs/pull/5517/head
poetry new foobar
pushd foobar
poetry source add jax https://storage.googleapis.com/jax-releases/jax_releases.html
poetry add -vvv --lock --source jax jaxlib
cat poetry.lock
EOF

[abn]

Change was verified as working in #5516.

[neersighted]

I feel like the name of create_legacy_repository might be worth changing, but otherwise this LGTM.

[abn]

I feel like the name of create_legacy_repository might be worth changing, but otherwise this LGTM.

Sounds like a good plan.

[github-actions]

This pull request has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.