#!/usr/bin/env bash

set -euo pipefail

build_and_install() {
  export MAKEFLAGS=-j`nproc`
  export CFLAGS="-fno-semantic-interposition -fpic -flto"
  cmake -DCMAKE_INSTALL_PREFIX=/usr/local -G"Unix Makefiles"
  make
  make install
}

install_build_dependencies() {
  apt-get update
  apt-get install -y cmake gcc
  ensure_libjpeg_is_fast
}

ensure_libjpeg_is_fast() {
  apt-get install -y nasm
}

prepare_libjpeg_source() {
  git clone --depth=1 https://github.com/libjpeg-turbo/libjpeg-turbo.git
  cd libjpeg-turbo
}

install_build_dependencies
prepare_libjpeg_source
build_and_install