How can I obtain the nerdctl pull output with raw terminal sequences included?

[shivabohemian]

Hello,

I aim to retrieve the output logs of the nerdctl pull 'image:tag' command to transmit them to the client's terminal using WebSocket. To accomplish this, I have started a pty (for example, using https://github.com/creack/pty) to execute the pull command and capture its output.

What perplexes me is that the output obtained with pty lacks control sequences for cursor movement and screen clearing. I observe these control sequences, such as [1A�[2K], in the output.txt file generated by the command nerdctl pull nginx >output.txt 2>output.txt. However, I am unable to capture them using pty. Why is this happening? Could you provide guidance on what steps I should take? Thanks!