Windowsでpoetryが上手くインストールできない場合の対処

いつも通りPowerShellからpoetryを入れようとしたら入らなくなってた

PS C:\Users\hoge> (Invoke-WebRequest -Uri https://raw.githubusercontent.com/python-poetry/poetry/master/get-poetry.py -UseBasicParsing).Content | python -                                                                                       
Retrieving Poetry metadata

This installer is deprecated, and cannot install Poetry 1.2.0a1 or newer.
Additionally, Poetry installations created by this installer cannot `self update` to 1.2.0a1 or later.
You should migrate to https://install.python-poetry.org instead. Instructions are available at https://python-poetry.org/docs/#installation.

This installer will now exit. If you understand the above warning and wish to proceed anyway, set GET_POETRY_IGNORE_DEPRECATION=1 in the environment and run this installer again.

どうやら今(2022/09/01 20:45頃)現在進行形で公式さんが色々変更を入れてるっぽい

取りあえず、以下を参考に

(Invoke-WebRequest -Uri https://install.python-poetry.org -UseBasicParsing).Content | python -

or

(Invoke-WebRequest -Uri https://install.python-poetry.org -UseBasicParsing).Content | py -

で入れられる。
特に環境をいじってなければ上のコマンドでいいはず。