begin
  require "rubygems/package_task"
rescue LoadError
  # rake/gempackagetask will go away some day
  require "rake/gempackagetask"
  Gem::PackageTask = Rake::GemPackageTask
end

##
# Package plugin for hoe.
#
# === Tasks Provided:
#
# install_gem::        Install the package as a gem.
# prerelease::         Hook for pre-release actions like sanity checks.
# postrelease::        Hook for post-release actions like release announcements.
# release::            Package and upload the release.

module Hoe::Package
  ##
  # Optional: Should package create a tarball? [default: true]

  attr_accessor :need_tar

  ##
  # Optional: Should package create a zipfile? [default: false]

  attr_accessor :need_zip

  ##
  # Initialize variables for plugin.

  def initialize_package
    self.need_tar ||= false
    self.need_zip ||= false
  end

  ##
  # Define tasks for plugin.

  def define_package_tasks
    prerelease_version

    Gem::PackageTask.new spec do |pkg|
      pkg.need_tar = @need_tar
      pkg.need_zip = @need_zip
    end

    desc "Install the package as a gem. (opt. NOSUDO=1)"
    task :install_gem => [:clean, :package, :check_extra_deps] do
      install_gem Dir["pkg/*.gem"].first
    end

    desc "Package and upload; Requires VERSION=x.y.z (optional PRE=a.1)"
    task :release => [:prerelease, :release_to, :postrelease]

    # no doco, invisible hook
    task :prerelease do
      abort "Fix your version before you release" if spec.version.to_s =~ /borked/
    end

    # no doco, invisible hook
    task :release_to

    # no doco, invisible hook
    task :postrelease

    desc "Sanity checks for release"
    task :release_sanity do
      v = ENV["VERSION"] or abort "Must supply VERSION=x.y.z"

      pre = ENV["PRERELEASE"] || ENV["PRE"]
      v += ".#{pre}" if pre

      c = changes[/\d\S+/]

      abort "Versions don't match: %s vs %s" % [v, version] if v != version
      abort "Versions don't match %s: %s vs %s" % [history_file, v, c] if v != c
    end
  end

  ##
  # Returns the path used for packaging. Convenience method for those
  # that need to write a package hook.

  def pkg_path
    "pkg/#{spec.full_name}"
  end

  ##
  # Install the named gem.

  def install_gem name, version = nil, rdoc = true
    should_not_sudo = Hoe::WINDOZE || ENV["NOSUDO"] || File.writable?(Gem.dir)
    null_dev = Hoe::WINDOZE ? "> NUL 2>&1" : "> /dev/null 2>&1"

    gem_cmd = Gem.default_exec_format % "gem"
    sudo    = "sudo "                  unless should_not_sudo
    local   = "--local"                unless version
    version = "--version '#{version}'" if     version

    cmd  = "#{sudo}#{gem_cmd} install #{local} #{name} #{version}"
    cmd += " --no-document" unless rdoc
    cmd += " #{null_dev}" unless Rake.application.options.trace

    result = sh cmd
    Gem::Specification.reset
    result
  end

  def prerelease_version # :nodoc:
    pre = ENV["PRERELEASE"] || ENV["PRE"]

    return unless pre

    spec.version = "#{spec.version}.#{pre}"

    abort "ERROR: You should format PRE like pre or alpha.1 or something" if
      (Gem::VERSION < "1.4"  and pre !~ /^[a-z]+(\.\d+)?$/) or
      (Gem::VERSION >= "1.4" and pre !~ /^[a-z]+(\.?\d+)?$/)
  end
end
