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Cloning from new host via ssh causes spurious error rather than prompting for confirmation and succeeding #1408

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jesuino
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@jesuino jesuino commented May 28, 2025

This is a possible fix for #1342

When a host is unknown then user will be prompted to add it to the know hosts file:

image

If the users clicks OK then the hostname is checked and added to the known hosts and it is proceeded by the clone operation, otherwise the clone operation will proceed and will likely fail.

Please bear in mind that I didn't check this on Windows, but I am opening the PR anyway for discussion and getting reviews because this is my first contribution for this plugin, so I may be missing some important details.

Thanks!

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Binder 👈 Launch a Binder on branch jesuino/jupyterlab-git/RHOAIENG-15324

@jiridanek
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jiridanek commented May 28, 2025

Just a suggestion in search of broader consensus, I don't insist on this change be made right away:

The message popup does not say exactly what will be added to my known_hosts. I'd much prefer if the line that will be added after I click ok was shown to me upfront.

Other than that, I like this, it will be nice to have.

"""
Check if the given git clone URL contains a known host
"""
cmd = ["ssh-keygen", "-F", hostname.replace(" ", "")]

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Is this for spaces at the beginning and end only? If so, why not .strip()?

A class to perform ssh actions
"""

def is_known_host(self, hostname):

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Can this be implemented in a "ask for forgiveness, not for permission" manner? That is, run clone, and if it fails on host not known, prompt user to add host?

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2 participants