Rakefile

# frozen_string_literal: true

require 'rubygems'
require 'rake'
require 'date'

require 'test/unit/testsuite'

module Test
  module Unit
    class TestSuite
      def run(result, &progress_block)
        yield(STARTED, name)
        run_startup(result)
        @tests.each do |test|
          test.run(result, &progress_block)
          break unless result.passed?
        end
        run_shutdown(result)
        yield(FINISHED, name)
      end
    end
  end
end

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

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

def version
  line = File.read("lib/#{name}.rb")[/^\s*VERSION\s*=\s*.*/]
  line.match(/.*VERSION\s*=\s*['"](.*)['"]/)[1]
end

def date
  Date.today.to_s
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*= ').*'/) { "#{Regexp.last_match(1)}#{send(header_name)}'" }
end

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

require 'rake/testtask'
Rake::TestTask.new do |t|
  t.libs << 'test/' << 'lib/'
  t.test_files = FileList['test/test*.rb']
  t.verbose = true
end

task default: :test

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

begin
  require 'yard'
  YARD::Rake::YardocTask.new
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
#
#############################################################################

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

task build: %i[gemspec reference] do
  sh 'mkdir -p pkg'
  sh "gem build #{gemspec_file}"
  sh "mv #{gem_file} pkg"
end

task gemspec: :validate 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

task :validate do
  libfiles = Dir['lib/*'] - ["lib/#{name}.rb", "lib/#{name}"]
  unless libfiles.empty?
    puts "Directory `lib` should only contain a `#{name}.rb` file and `#{name}` dir."
    exit!
  end
  unless Dir['VERSION*'].empty?
    puts 'A `VERSION` file at root level violates Gem best practices.'
    exit!
  end
end

desc 'Creates REFERENCE.md'
task :reference do
  system 'ruby ./scripts/reference.rb > REFERENCE.md'
end