如何在Windows子进程中的ssh上运行git fetch

Question

I've got some code which needs to grab code from github periodically (on a Windows machine).

When I do pulls manually, I use GitBash, and I've got ssh keys running for the repos I check so everything is fine. However when I try to run the same actions in a python subprocess I don't have the ssh services which GitBash provides and I'm unable to authenticate to the repo.

How should I proceed from here. I can think of a couple of different options:

1. I could revert to using https:// fetches. This is problematic because the repos I'm fetching use 2-factor authentication and are going to be running unattended. Is there a way to access an https repo that has 2fa from a command line?

2. I've tried calling sh.exe with arguments that will fire off ssh-agent and then issuing my commands so that everything is running more or less the way it does in gitBash, but that doesn't seem to work:

    "C:\\Program Files (x86)\\Git\\bin\\sh.exe" -c "C:/Program\\ Files\\ \\(x86\\)/Git/bin/ssh-agent.exe; C:/Program\\ Files\\ \\(x86\\)/Git/bin/ssh.exe -t git@github.com" 

   produces

    SSH_AUTH_SOCK=/tmp/ssh-SiVYsy3660/agent.3660; export SSH_AUTH_SOCK; SSH_AGENT_PID=8292; export SSH_AGENT_PID; echo Agent pid 8292; Could not create directory '/.ssh'. The authenticity of host 'github.com (192.30.252.129)' can't be established. RSA key fingerprint is XXXXXXXXXXX Are you sure you want to continue connecting (yes/no)? yes Failed to add the host to the list of known hosts (/.ssh/known_hosts). Permission denied (publickey). 

3. Could I use an ssh module in python like paramiko to establish a connection? It looks to me like that's only for ssh'ing into a remote terminal. Is there a way to make it provide an ssh connection that git.exe can use?

So, I'd be grateful if anybody has done this before or has a better alternative

Answer 1

The git bash set the HOME environment variable, which allows git to find the ssh keys (in %HOME%/.ssh )

You need to make sure the python process has or define HOME to the same PATH.
As explained in " Python os.environ[“HOME”] works on idle but not in a script ", you need to set HOME to %USERPROFILE% (or, in python, to os.path.expanduser("~") ).