#!/bin/bash

# TODO: extract uid from 'From: ' header
uid='eeerich@eckner.net'
key=$(
  gpg \
    --export \
    --export-options=export-minimal \
    --export-filter "keep-uid='uid =~ ${uid}'" \
    "${uid}" \
  | base64 -w72
)

if [ -n "${key}" ]; then
  printf 'Autocrypt: addr=%s; prefer-encrypt=mutual; keydata=\n' \
    "${uid}"
  printf '%s\n' "${key}" \
  | sed 's/^/ /'
fi