Git Bash: Could not open a connection to your authentication agent [duplicate]

Answer 1

above solution doesn't work for me for unknown reason. below is my workaround which was worked successfully.

1) DO NOT generate a new ssh key by using command ssh-keygen -t rsa -C"xxx@xx.com", you can delete existing SSH keys.

2) but use Git GUI, -> "Help" -> "Show ssh key" -> "Generate key", the key will saved to ssh automatically and no need to use ssh-add anymore.

Answer 2

I would like to improve on the accepted answer

Downsides of using .bashrc with eval ssh-agent -s:

1. Every git-bash will have it's own ssh-agent.exe process
2. SSH key should be manually added every time you open git-bash

Here is my .bashrc that will eradicate above downsides

Put this .bashrc into your home directory (Windows 10: C:\Users\[username]\.bashrc) and it will be executed every time a new git-bash is opened and ssh-add will be working as a first class citizen

Read #comments to understand how it works

# Env vars used
# SSH_AUTH_SOCK - ssh-agent socket, should be set for ssh-add or git to be able to connect
# SSH_AGENT_PID - ssh-agent process id, should be set in order to check that it is running
# SSH_AGENT_ENV - env file path to share variable between instances of git-bash
SSH_AGENT_ENV=~/ssh-agent.env
# import env file and supress error message if it does not exist
. $SSH_AGENT_ENV 2> /dev/null

# if we know that ssh-agent was launched before ($SSH_AGENT_PID is set) and process with that pid is running 
if [ -n "$SSH_AGENT_PID" ] && ps -p $SSH_AGENT_PID > /dev/null 
then
  # we don't need to do anything, ssh-add and git will properly connect since we've imported env variables required
  echo "Connected to ssh-agent"
else   
  # start ssh-agent and save required vars for sharing in $SSH_AGENT_ENV file
  eval $(ssh-agent) > /dev/null
  echo export SSH_AUTH_SOCK=\"$SSH_AUTH_SOCK\" > $SSH_AGENT_ENV
  echo export SSH_AGENT_PID=$SSH_AGENT_PID >> $SSH_AGENT_ENV
  echo "Started ssh-agent"
fi

Also this script uses a little trick to ensure that provided environment variables are shared between git-bash instances by saving them into an .env file.