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POHow to get only remote git operations to trigger a ssh-add event for ssh-agent?
 

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  1. POHow to get only remote git operations to trigger a ssh-add event for ssh-agent?
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    <p>I recently asked a <a href="https://askubuntu.com/questions/36255/why-wont-ssh-agent-save-my-unencrypted-key-for-later-use">question on AskUbuntu</a> about getting ssh-agent to automatically save my passphrase protected key for later re-use without having to re-enter the passphrase during bash login (non-GUI/Gnome). I got a nice bash script in response, but unfortunately it is triggered to ask for the passphrase no matter the git operation. I only want to be prompted if they key is not already in ssh-agent and a remote git operation is being performed.</p> <p>This is due to the fact that I use <code>$(__git_ps1 "[%s]")</code> in my bash prompt to display the git branch of the current working directory (<code>pwd</code>). So when I ssh into the machine it immediately asks me for the keys passphrase before it can render the bash prompt!</p> <p>The current script from <a href="https://askubuntu.com/questions/36255/why-wont-ssh-agent-save-my-unencrypted-key-for-later-use/36302#36302">the answer to my question on AskUbuntu</a> looks like:</p> <p>In <code>~/.bash_profile</code>:</p> <pre><code># File: ~/.bash_profile # source ~/.profile, if available if [[ -r ~/.profile ]]; then . ~/.profile fi # start agent and set environment variables, if needed agent_started=0 if ! env | grep -q SSH_AGENT_PID &gt;/dev/null; then echo "Starting ssh agent" eval $(ssh-agent -s) agent_started=1 fi # ssh become a function, adding identity to agent when needed ssh() { if ! ssh-add -l &gt;/dev/null 2&gt;-; then ssh-add ~/.ssh/id_dsa fi /usr/bin/ssh "$@" } export -f ssh # another example: git git() { if ! ssh-add -l &gt;/dev/null 2&gt;-; then ssh-add ~/.ssh/id_dsa fi /usr/bin/git "$@" } export -f git </code></pre> <p>So as you can see the git function is triggered on every git operation.</p> <p>I had thought that git would use <code>ssh</code> to make the connection, but it doesn't appear to trigger the <code>ssh()</code> function in the above script. How does git perform its ssh operations? Does it access /usr/bin/ssh directly rather than relying on the bash path?</p> <p>Have you got a better way of doing this or a nice workaround for the current script?</p>
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    1. COThe git executable /usr/bin/git is not written in bash (AFAIK) and so there is no reason for it to execute your ssh function.
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    2. CO@nhed that was my hypothesis. I wonder if I can replace `/usr/bin/ssh` with a bash `ssh` wrapper script so that it would be triggered?
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    3. COsounds dangerous, the git man-page mentions an env variable GIT_SSH - make that point to a wrapper - that may work cleaner. Give that a shot
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