`rsconnect deploy` fails with hierarchical `requirements.txt`

Issue

In our environment rsconnect deploy fails when requirements.txt refers to other requirement files as described in Referring to other requirements files.

Steps to reproduce

Sorry, I currently can't think of a better way to give you an easily reproducable example than describing the case.

The following command is run by an AWS CodeBuild step:

rsconnect deploy streamlit -n server -a $APP_ID -e 0_Übersicht.py app

The streamlit app has some sub-packages with their own requirement files:

app/
   data_pipelines/
      requirements.txt
      ...
   pages/
      ...
   0_Übersicht.py
   requirements.txt
   ...

with app/requirements.txt looking like

-r data_pipelines/requirements.txt

streamlit
...

Outcome

The deployment fails with the following output:

Most notably is

270 | 2023/02/07 13:29:48.945320724 ERROR: Could not open requirements file: [Errno 2] No such file or directory: 'python/data_pipelines/requirements.txt'

Expected outcome

All referred requirements files are traversed and the listed requirements installed.

まず、app/requirements.txt と data_pipelines/requirements.txt の図示されたレイアウトで rsconnect deploy streamlit コマンドを再現し、次にデプロイバンドルが参照された requirements ファイルをどのように処理するかを追跡します。-r data_pipelines/requirements.txt がバンドルされたアプリ内で解決され、参照されたすべての requirements が正常にインストールされれば、修正は完了です。