Non-Interactive pnpm install --no-optional hangs without --config.confirmModulesPurge=false

Hello,

I recently encountered an issue with pnpm version 8.6.6 during a Docker build process.

When running the command in a Dockerfile:

pnpm install --no-optional -r --offline --ignore-scripts --frozen-lockfile 

the command did not fail but led to an empty node_modules folder.

I found that when running the same command interactively inside the Docker container, a confirmation prompt was shown. After confirming with Y, the command executed as expected.

However, this behavior is problematic in non-interactive environments like Docker builds, where the command cannot receive any user input.

As a workaround, I used the --config.confirmModulesPurge=false option to automatically confirm the prompt, as shown below:

pnpm install --no-optional -r --offline --ignore-scripts --frozen-lockfile --config.confirmModulesPurge=false

This successfully bypassed the confirmation and the node_modules folder was correctly populated.

Although I was able to find a workaround, I believe it would be helpful to improve the handling of this situation, perhaps by making the --no-optional flag non-interactive by default, or providing clear documentation about the need for --config.confirmModulesPurge=false in non-interactive environments.

Thank you for your attention to this issue!