install sqlite3 in dokku

pre-build

#!/bin/bash
set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x

APP="$1"
IMAGE="dokku/$1"

PLUGIN_DIR=$(dirname $0)

echo "-----> Injecting sqlite3 ..."

if docker run -a stdout -i $IMAGE /usr/bin/dpkg -s libsqlite3-dev > /dev/null; then
  echo "sqlite3 is already installed (skipping apt-get update/install)"
else
  echo "sqlite3 is not installed (will install via apt-get)"
  id=$(docker run -i -a stdin $IMAGE /bin/bash -c "apt-get update && apt-get install -y libsqlite3-dev && apt-get clean")
  test $(docker wait $id) -eq 0
  docker commit $id $IMAGE > /dev/null
fi