#! /bin/sh
# usage: mail-current-query-find-part-by-name NAME
set -efu

name=$1

query=$(mail-current-query)
result=$(notmuch show --entire-thread=false --format=json "$query")

part_id=$(printf %s "$result" | jq --arg name "$name" '
  [
    recurse |
    select(type == "object") |
    { id, name: .filename } |
    select(.id != null and .name != null)
  ] |
  map(select(.name == $name))[0].id
')

if test "$part_id" = null; then
  printf 'error: could not find part with name %s\n' \
    "$name" \
    >&2
  exit 1
fi

exec notmuch show --part="$part_id" "$query"