jj git clone doesn't support interactive authentication

[zygoloid]

Description

jj git clone (and presumably other jj git commands) don't support interactive authentication, for example if ssh is used to connect to the remote and the ssh key has a passphrase.

Steps to Reproduce the Problem

1. Set up a github ssh key with a passphrase, and specify a corresponding IdentityFile in .ssh/config
2. Attempt to jj git clone git@github:...

Expected Behavior

The passphrase for the ssh identity file is requested, and the git operation continues.

Actual Behavior

jj git clone fails with the error:

Error: Fetch failed: Failed to retrieve list of SSH authentication methods: Failed getting response; class=Ssh (23); code=Auth (-16)

Specifications

• Platform: linux
• Version:

[martinvonz]

This is a known limitation. I recommend using ssh-agent until it's fixed (and also after it's fixed).

[worldofgeese]

I think (I've since gone back to Git) that this means jj doesn't currently work with 1Password's SSH agent or at least I was unable to continue when using it. Just wanted to add this to the issue in case others wander by looking.

[dbarnett]

Even if ssh-agent is running it seems to give cryptic errors if the agent doesn't have the key added yet: Error: Failed to authenticate SSH session: Unable to extract public key from private key file: Wrong passphrase or invalid/unrecognized private key file format; class=Ssh (23)

Seems like the error message could at least be improved for that case, but that probably comes directly from libgit2, right?