require 'rubygems'
require 'bundler'
require 'date'
require 'ruby-debug'

#############################################################################
#
# Helper functions
#
#############################################################################

def name
  @name ||= Dir['*.gemspec'].first.split('.').first
end

def version
  line = File.read("lib/sinatra/bundles.rb")[/^\s*Version\s*=\s*.*/]
  line.match(/.*Version\s*=\s*['"](.*)['"]/)[1]
end

def date
  Date.today.to_s
end

def rubyforge_project
  name
end

def gemspec_file
  "#{name}.gemspec"
end

def gem_file
  "#{name}-#{version}.gem"
end

def replace_header(head, header_name)
  head.sub!(/(\.#{header_name}\s*= ').*'/) { "#{$1}#{send(header_name)}'"}
end

#############################################################################
#
# Standard tasks
#
#############################################################################

desc "Open an irb session preloaded with this library"
task :console do
  sh "irb -rubygems -r ./lib/#{name}.rb"
end

#############################################################################
#
# Custom tasks (add your own tasks here)
#
#############################################################################

require 'rspec/core/rake_task'
RSpec::Core::RakeTask.new(:spec) do |spec|
  # spec.libs << 'lib' << 'spec'
  spec.pattern = 'spec/**/*_spec.rb'
end

RSpec::Core::RakeTask.new(:rcov) do |spec|
  # spec.libs << 'lib' << 'spec'
  spec.pattern = 'spec/**/*_spec.rb'
  spec.rcov = true
end

task :default => :spec

begin
  require 'yard'
  YARD::Rake::YardocTask.new do |t|
    t.files = ['lib/**/*.rb']
  end
rescue LoadError
  task :yardoc do
    abort 'YARD is not available. In order to run yardoc, you must: sudo gem install yard'
  end
end

#############################################################################
#
# Packaging tasks
#
#############################################################################

desc "Create tag v#{version} and build and push #{gem_file} to Rubygems"
task :release => :build do
  unless `git branch` =~ /^\* master$/
    puts "You must be on the master branch to release!"
    exit!
  end
  sh "git commit --allow-empty -a -m 'Release #{version}'"
  sh "git tag v#{version}"
  sh "git push origin master"
  sh "git push origin v#{version}"
  sh "gem push pkg/#{name}-#{version}.gem"
end

desc "Build #{gem_file} into the pkg directory"
task :build => :gemspec do
  sh "mkdir -p pkg"
  sh "gem build #{gemspec_file}"
  sh "mv #{gem_file} pkg"
end

desc "Generate #{gemspec_file}"
task :gemspec do
  # read spec file and split out manifest section
  spec = File.read(gemspec_file)
  head, manifest, tail = spec.split("  # = MANIFEST =\n")

  # replace name version and date
  replace_header(head, :name)
  replace_header(head, :version)
  replace_header(head, :date)

  # determine file list from git ls-files
  files = `git ls-files`.
    split("\n").
    sort.
    reject { |file| file =~ /^\./ }.
    reject { |file| file =~ /^(rdoc|pkg)/ }.
    map { |file| "    #{file}" }.
    join("\n")

  # piece file back together and write
  manifest = "  s.files = %w[\n#{files}\n  ]\n"
  spec = [head, manifest, tail].join("  # = MANIFEST =\n")
  File.open(gemspec_file, 'w') { |io| io.write(spec) }
  puts "Updated #{gemspec_file}"
end