GPG agent with SSH support and remote passthrough.

.bashrc

#!/bin/bash

# ... normal .bashrc stuff

# if our gpg agent environment file exists _and_ we're not over SSH
if [[ -f "$HOME/.gpg-agent-info" && -z "$SSH_CLIENT" ]]; then
    # load environment variables to use local gpg agent for gpg and SSH
    source "$HOME/.gpg-agent-info"
    export GPG_AGENT_INFO SSH_AUTH_SOCK SSH_AGENT_PID
fi

# set gpg's tty to the current tty
export GPG_TTY="$(tty)"