Load the ssh key #function #bash #ssh

load_ssh_key.sh

load_ssh_key() {
    key=~/.ssh/id_ed25519
    force=0
    if [ -n "$1" ]; then
        if [ -e "$1" ]; then
            key=$(readlink -f $1)
        elif [ "$1" == "reset-all" ]; then
            echo "resetting"
            pkill --signal 9 -f ssh-agent
            force=1
        fi
    fi

    SOCKET="$HOME/.ssh/ssh_auth_sock"
    #SOCKET="$(ls -t /run/user/$(id -ur)/keyring*/ssh | head -1)"  # this should find the most recently created ubuntu socket
    # if the socket doesn't already exists and there isn't any agent running:
    if [ $force -eq 1 ] || ! pgrep -u $USER ssh-agent > /dev/null || [ ! -e "$SOCKET" ]; then
        echo "deleting socket"
        rm -f "$SOCKET" # socket exists, pid doesn't
        eval $(ssh-agent -s -a $SOCKET)
    fi
    export SSH_AUTH_SOCK=$SOCKET

    if ! env | grep -q SSH_AGENT_PID; then
        export SSH_AGENT_PID=$(pgrep -u $USER ssh-agent | tail -1)
    fi
    # Only load the ssh keys if we need them
    fingerprint="$(ssh-keygen -lf "$key" | cut -d' ' -f2)"
    if ! ssh-add -l | grep -q "$fingerprint"; then
        ssh-add $key > /dev/null && echo "Loaded $key"
        [ $? -gt 0 ] && load_ssh_key reset-all
    fi
}