# encoding: utf-8
#  Phusion Passenger - https://www.phusionpassenger.com/
#  Copyright (c) 2013 Phusion
#
#  "Phusion Passenger" is a trademark of Hongli Lai & Ninh Bui.
#
#  Permission is hereby granted, free of charge, to any person obtaining a copy
#  of this software and associated documentation files (the "Software"), to deal
#  in the Software without restriction, including without limitation the rights
#  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
#  copies of the Software, and to permit persons to whom the Software is
#  furnished to do so, subject to the following conditions:
#
#  The above copyright notice and this permission notice shall be included in
#  all copies or substantial portions of the Software.
#
#  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
#  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
#  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
#  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
#  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
#  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
#  THE SOFTWARE.

PhusionPassenger.require_passenger_lib 'constants'
require 'build/preprocessor'

# If you change the default distribution list, don't forget to update the configuration
# file in passenger_apt_automation too: https://github.com/phusion/passenger_apt_automation
ALL_DISTRIBUTIONS  = string_option("DEBIAN_DISTROS", "raring precise lucid").split(/[ ,]/)
DEBIAN_NAME        = "passenger"
DEBIAN_EPOCH       = 1
DEBIAN_ARCHS       = string_option("DEBIAN_ARCHS", "i386 amd64").split(/[ ,]/)
DEBIAN_ORIG_TARBALL_FILES = lambda { PhusionPassenger::Packaging.debian_orig_tarball_files }

def create_debian_package_dir(distribution, output_dir = PKG_DIR)
  require 'time'

  variables = {
    :distribution => distribution
  }

  root = "#{output_dir}/#{distribution}"
  orig_tarball = File.expand_path("#{PKG_DIR}/#{DEBIAN_NAME}_#{PACKAGE_VERSION}.orig.tar.gz")

  sh "rm -rf #{root}"
  sh "mkdir -p #{root}"
  sh "cd #{root} && tar xzf #{orig_tarball}"
  sh "bash -c 'shopt -s dotglob && mv #{root}/#{DEBIAN_NAME}_#{PACKAGE_VERSION}/* #{root}'"
  sh "rmdir #{root}/#{DEBIAN_NAME}_#{PACKAGE_VERSION}"
  recursive_copy_files(Dir["debian.template/**/*"], root,
    true, variables)
  sh "mv #{root}/debian.template #{root}/debian"
  changelog = File.read("#{root}/debian/changelog")
  changelog =
    "#{DEBIAN_NAME} (#{DEBIAN_EPOCH}:#{PACKAGE_VERSION}-1~#{distribution}1) #{distribution}; urgency=low\n" +
    "\n" +
    "  * Package built.\n" +
    "\n" +
    " -- #{MAINTAINER_NAME} <#{MAINTAINER_EMAIL}>  #{Time.now.rfc2822}\n\n" +
    changelog
  File.open("#{root}/debian/changelog", "w") do |f|
    f.write(changelog)
  end
end

task 'debian:orig_tarball' => Packaging::PREGENERATED_FILES do
  if File.exist?("#{PKG_DIR}/#{DEBIAN_NAME}_#{PACKAGE_VERSION}.orig.tar.gz")
    puts "WARNING: Debian orig tarball #{PKG_DIR}/#{DEBIAN_NAME}_#{PACKAGE_VERSION}.orig.tar.gz already exists. " +
      "It will not be regenerated. If you are sure that the orig tarball is outdated, please delete it " +
      "and rerun this task."
  else
    sh "mkdir -p #{PKG_DIR}"
    nginx_version = PhusionPassenger::PREFERRED_NGINX_VERSION
    local_nginx_tarball = File.expand_path("#{PKG_DIR}/nginx-#{nginx_version}.tar.gz")
    if File.exist?(local_nginx_tarball)
      puts "#{local_nginx_tarball} already exists"
    else
      sh "curl -L --fail -o #{local_nginx_tarball} http://nginx.org/download/nginx-#{nginx_version}.tar.gz"
    end
    sh "rm -rf #{PKG_DIR}/#{DEBIAN_NAME}_#{PACKAGE_VERSION}"
    sh "mkdir -p #{PKG_DIR}/#{DEBIAN_NAME}_#{PACKAGE_VERSION}"
    recursive_copy_files(DEBIAN_ORIG_TARBALL_FILES.call, "#{PKG_DIR}/#{DEBIAN_NAME}_#{PACKAGE_VERSION}")
    sh "cd #{PKG_DIR}/#{DEBIAN_NAME}_#{PACKAGE_VERSION} && tar xzf #{local_nginx_tarball}"
    sh "cd #{PKG_DIR} && find #{DEBIAN_NAME}_#{PACKAGE_VERSION} -print0 | xargs -0 touch -d '2013-10-27 00:00:00 UTC'"
    sh "cd #{PKG_DIR} && tar -c #{DEBIAN_NAME}_#{PACKAGE_VERSION} | gzip --no-name --best > #{DEBIAN_NAME}_#{PACKAGE_VERSION}.orig.tar.gz"
  end
end

desc "Build Debian source and binary package(s) for local testing"
task 'debian:dev' do
  sh "rm -f #{PKG_DIR}/#{DEBIAN_NAME}_#{PACKAGE_VERSION}.orig.tar.gz"
  Rake::Task["debian:clean"].invoke
  Rake::Task["debian:orig_tarball"].invoke
  if string_option('DISTRO').nil?
    distributions = [File.read("/etc/lsb-release").scan(/^DISTRIB_CODENAME=(.+)/).first.first]
  else
    distributions = ALL_DISTRIBUTIONS
  end
  distributions.each do |distribution|
    create_debian_package_dir(distribution)
    sh "cd #{PKG_DIR}/#{distribution} && dpkg-checkbuilddeps"
  end
  distributions.each do |distribution|
    sh "cd #{PKG_DIR}/#{distribution} && env DEBUILD_DPKG_BUILDPACKAGE_OPTS=-F " +
      "debuild -e CCACHE_* -us -uc"
  end
end

desc "(Re)install the Debian binary packages built for local testing"
task 'debian:dev:reinstall' do
  package_names = ["passenger", "passenger-dev",
    "passenger-doc", "libapache2-mod-passenger"]
  package_names.each do |name|
    if Dir["#{PKG_DIR}/#{name}_*.deb"].size > 1
      abort "Please ensure that #{PKG_DIR} only has 1 version of the Phusion Passenger packages."
    end
  end
  package_names.each do |name|
    if !system "sudo apt-get remove -y #{name}"
      if !$? || $?.exitstatus != 100
        abort
      end
    end
  end
  package_names.each do |name|
    filename = Dir["#{PKG_DIR}/#{name}_*.deb"].first
    sh "sudo gdebi -n #{filename}"
  end
end

desc "Build official Debian source packages"
task 'debian:source_packages' => 'debian:orig_tarball' do
  if boolean_option('USE_CCACHE', false)
    # The resulting Debian rules file must not set USE_CCACHE.
    abort "USE_CCACHE must be returned off when running the debian:source_packages task."
  end

  pkg_dir = "#{PKG_DIR}/official"
  if File.exist?(pkg_dir)
    abort "#{pkg_dir} must not already exist when running the debian:source_packages task."
  end
  sh "mkdir #{pkg_dir}"
  sh "cd #{pkg_dir} && ln -s ../#{DEBIAN_NAME}_#{PACKAGE_VERSION}.orig.tar.gz ."

  ALL_DISTRIBUTIONS.each do |distribution|
    create_debian_package_dir(distribution, pkg_dir)
  end
  ALL_DISTRIBUTIONS.each do |distribution|
    sh "cd #{pkg_dir}/#{distribution} && env DEBUILD_DPKG_BUILDPACKAGE_OPTS=-S " +
      "debuild -us -uc"
  end
end

def pbuilder_base_name(distribution, arch)
  if arch == "amd64"
    return distribution
  else
    return "#{distribution}-#{arch}"
  end
end

def create_debian_binary_package_task(distribution, arch)
  task "debian:binary_package:#{distribution}_#{arch}" => 'debian:binary_packages:check' do
    require 'shellwords'
    base_name = "#{DEBIAN_NAME}_#{PACKAGE_VERSION}-1~#{distribution}1"
    logfile = "#{PKG_DIR}/official/passenger_#{distribution}_#{arch}.log"
    command = "cd #{PKG_DIR}/official && " +
      "pbuilder-dist #{distribution} #{arch} build #{base_name}.dsc " +
      "2>&1 | awk '{ print strftime(\"%Y-%m-%d %H:%M:%S -- \"), $0; fflush(); }'" +
      " | tee #{logfile}; test ${PIPESTATUS[0]} -eq 0"
    sh "bash -c #{Shellwords.escape(command)}"
    sh "echo Done >> #{logfile}"
  end
end

DEBIAN_BINARY_PACKAGE_TASKS = []
ALL_DISTRIBUTIONS.each do |distribution|
  DEBIAN_ARCHS.each do |arch|
    task = create_debian_binary_package_task(distribution, arch)
    DEBIAN_BINARY_PACKAGE_TASKS << task
  end
end

task 'debian:binary_packages:check' do
  pkg_dir = "#{PKG_DIR}/official"
  if !File.exist?(pkg_dir)
    abort "Please run rake debian:source_packages first."
  end

  pbuilder_dir = File.expand_path("~/pbuilder")
  ALL_DISTRIBUTIONS.each do |distribution|
    DEBIAN_ARCHS.each do |arch|
      pbase_name = pbuilder_base_name(distribution, arch) + "-base.tgz"
      if !File.exist?("#{pbuilder_dir}/#{pbase_name}")
        abort "Missing pbuilder environment for #{distribution}-#{arch}. " +
          "Please run this first: pbuilder-dist #{distribution} #{arch} create"
      end
    end
  end
end

desc "Build official Debian binary packages"
task 'debian:binary_packages' => DEBIAN_BINARY_PACKAGE_TASKS

desc "Clean Debian packaging products, except for orig tarball"
task 'debian:clean' do
  files = Dir["#{PKG_DIR}/*.{changes,build,deb,dsc,upload}"]
  sh "rm -f #{files.join(' ')}"
  sh "rm -rf #{PKG_DIR}/official"
  ALL_DISTRIBUTIONS.each do |distribution|
    sh "rm -rf #{PKG_DIR}/#{distribution}"
  end
  sh "rm -rf #{PKG_DIR}/*.debian.tar.gz"
end