#!/bin/bash

app_name="nodejs-lts"
tmp_dir="/tmp/${app_name}_tmp"
version="20.18.0"
release="v${version}"
pkg_arch="x64"
deb_arch="amd64"

if [ "$1" == "arm" ]; then
  pkg_arch="arm64"
  deb_arch="arm64"
fi


deb_url="http://mirrors.ustc.edu.cn/node/latest-v20.x/node-${release}-linux-${pkg_arch}.tar.xz"

# 创建临时目录, 用于下载官方包
if [ -d $tmp_dir ]; then
  rm -rf $tmp_dir
fi

if [ -d "./unpack" ]; then
  sudo rm -rf ./unpack
fi

if [ -f "./${app_name}_${version}.deb" ]; then
  rm "./${app_name}_${version}.deb"
fi

mkdir $tmp_dir

# 创建临时待打包目录
echo "创建待打包目录..."
mkdir -p "./unpack/DEBIAN"
mkdir -p "./unpack/usr"

echo "下载官方原包..."
wget $deb_url -O "${tmp_dir}/${app_name}-${pkg_arch}.tar.xz"


echo "下载完成, 解包中..."
tar -xf "${tmp_dir}/${app_name}-${pkg_arch}.tar.xz" -C $tmp_dir


echo "解包完成, 复制到待打包目录..."
mv ${tmp_dir}/node-${release}-linux-${pkg_arch}/bin "./unpack/usr/"
mv ${tmp_dir}/node-${release}-linux-${pkg_arch}/include "./unpack/usr/"
mv ${tmp_dir}/node-${release}-linux-${pkg_arch}/lib "./unpack/usr/"
mv ${tmp_dir}/node-${release}-linux-${pkg_arch}/share "./unpack/usr/"

rm -rf $tmp_dir

echo "复制完成, 计算文件md5..."

cd ./unpack

find usr/ -type f | xargs md5sum > DEBIAN/md5sums

IFS=$'\t' read -ra size <<< "$(du -d 0)"

echo """
Package: ${app_name}
Version: ${version}
Section: devlop
Installed-Size: ${size[0]}
Architecture: ${deb_arch}
Maintainer: Yutent <yutent.io@gmail.com>
Priority: optional
Depends: libc6 (>= 2.28), libgcc1 (>= 1:3.4), libstdc++6 (>= 5.2), python3-minimal, ca-certificates
Breaks: nodejs, nodejs-current, npm
Replaces: nodejs, nodejs-current, npm
Provides: nodejs, npm
Homepage: https://nodejs.org
Description: Node.js event-based server-side javascript engine
 Node.js is similar in design to and influenced by systems like
 Ruby's Event Machine or Python's Twisted.
 .
 It takes the event model a bit further - it presents the event
 loop as a language construct instead of as a library.
 .
 Node.js is bundled with several useful libraries to handle server tasks :
 System, Events, Standard I/O, Modules, Timers, Child Processes, POSIX,
 HTTP, Multipart Parsing, TCP, DNS, Assert, Path, URL, Query Strings.


""" > DEBIAN/control

echo '计算文件md5完成, 打包中...'

cd ..
sudo chown -R root:root unpack

dpkg-deb -b ./unpack "./${app_name}-${deb_arch}_${version}.deb"

sudo rm -rf ./unpack
echo "打包完成 :)"