Header script doesn't work when being piped or run with process substitution

[bryant1410]

Checklist

• [X] I added a descriptive title
• [X] I searched open reports and couldn't find a duplicate

What happened?

The script doesn't work when being piped or run with process substitution. This causes the following to fail:

curl -fsSL https://repo.anaconda.com/miniconda/Miniconda3-latest-Linux-x86_64.sh | bash

And:

bash <(curl -fsSL https://repo.anaconda.com/miniconda/Miniconda3-latest-Linux-x86_64.sh)

The following lines cause the issue:

https://github.com/conda/constructor/blob/84995c8316a5399bc3dc2b67f64c92be71e9eb51/constructor/header.sh#L19-L22

Conda Info

No response

Conda Config

No response

Conda list

No response

Additional Context

Related to https://github.com/conda/conda/issues/12477

[jaimergp]

I think the intent here was to prevent source from being used. I am not sure if piping was supposed to be prevented too. Some might say it's a bad practice and it should be discouraged...

Pinging @conda/constructor for their opinion too.

[github-actions[bot]]

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Thanks!

[bryant1410]

Hey, please don't let this issue die!