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ssh-agent forward for emerge with git
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gemi
n00b
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Joined: 10 Oct 2012
Posts: 15

PostPosted: Thu Oct 17, 2013 4:02 am    Post subject: ssh-agent forward for emerge with git Reply with quote

Hi,

I wrote my own overlay with layman and use git to host the overlay as well as the packages that I try to install.

When I emerge packages out of the overlay I get asked for the git repository password. Now I want to set it up in a way so it does not ask me for a password anymore. I added ssh keys so that a git clone of the desired packages works passwordless. I use ssh-agent for that.
However if I do and emerge of the package it still asks me for a password. I assume this has to do with emerge running as user portage.

This works fine passwordless:
Code:
eval `ssh-agent`
ssh-add deploy_rsa
git clone some_package
kill $SSH_AGENT_PID


This does not work passwordless:
Code:
eval `ssh-agent`
ssh-add deploy_rsa
emerge -av some_package
kill $SSH_AGENT_PID




How can that be fixed? I don't want to remove the security of the git host.
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Hu
Watchman
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Joined: 06 Mar 2007
Posts: 8600

PostPosted: Thu Oct 17, 2013 7:34 pm    Post subject: Reply with quote

You could create a password-less key that has read-only access to the repository. Give that key to Portage and retain the read-write key for yourself.

If you serve the repository over the Git protocol, you could have emerge download via the Git protocol instead of tunnelling over ssh.
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gemi
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Joined: 10 Oct 2012
Posts: 15

PostPosted: Thu Oct 17, 2013 11:35 pm    Post subject: Reply with quote

That is what I did. I have a passwordless key read only file to access the repository. Works great if I do a normal git clone .... But if I run the ebuild through the emerge comand, that does nothing other than a git clone, it does not work.
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Hu
Watchman
Watchman


Joined: 06 Mar 2007
Posts: 8600

PostPosted: Fri Oct 18, 2013 12:00 am    Post subject: Reply with quote

You checked that the read-only key is in the Portage user's .ssh directory and has the correct permissions, and it still does not work? What happens if you pass -v to the underlying ssh? Have you tested running the git clone by hand as the Portage user?
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gemi
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Joined: 10 Oct 2012
Posts: 15

PostPosted: Fri Oct 18, 2013 12:03 am    Post subject: Reply with quote

Ok, where is the portage user .ssh directory located?

So far I used ssh-agent and hoped that the environment variables get forwarded to emerge
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