Rakefile

SWIFTLINT_VERSION="0.27.0"
XCODE_WORKSPACE="Simplenote.xcworkspace"
XCODE_SCHEME="Simplenote"
XCODE_CONFIGURATION="Debug"

require 'fileutils'
require 'tmpdir'
require 'rake/clean'
require 'yaml'
require 'digest'
PROJECT_DIR = File.expand_path(File.dirname(__FILE__))

task default: %w[test]

desc "Install required dependencies"
task :dependencies => %w[dependencies:check]

namespace :dependencies do
  task :check => %w[bundler:check bundle:check pod:check lint:check]

  namespace :bundler do
    task :check do
      unless command?("bundler")
        Rake::Task["dependencies:bundler:install"].invoke
      end
    end

    task :install do
      puts "Bundler not found in PATH, installing to vendor"
      ENV['GEM_HOME'] = File.join(PROJECT_DIR, 'vendor', 'gems')
      ENV['PATH'] = File.join(PROJECT_DIR, 'vendor', 'gems', 'bin') + ":#{ENV['PATH']}"
      sh "gem install bundler" unless command?("bundler")
    end
    CLOBBER << "vendor/gems"
  end

  namespace :bundle do
    task :check do
      sh "bundle check --path=${BUNDLE_PATH:-vendor/bundle} > /dev/null", verbose: false do |ok, res|
        next if ok
        # bundle check exits with a non zero code if install is needed
        dependency_failed("Bundler")
        Rake::Task["dependencies:bundle:install"].invoke
      end
    end

    task :install do
      fold("install.bundler") do
        sh "bundle install --jobs=3 --retry=3 --path=${BUNDLE_PATH:-vendor/bundle}"
      end
    end
    CLOBBER << "vendor/bundle"
    CLOBBER << ".bundle"
  end

  namespace :pod do
    task :check do
      unless podfile_locked? && lockfiles_match?
        dependency_failed("CocoaPods")
        Rake::Task["dependencies:pod:install"].invoke
      end
    end

    task :install do
      fold("install.cocoapds") do
        pod %w[install]
      end
    end

    task :clean do
      fold("clean.cocoapds") do
        FileUtils.rm_rf('Pods')
      end
    end
    CLOBBER << "Pods"
  end

  namespace :lint do

    task :check do
      if swiftlint_needs_install
        dependency_failed("SwiftLint")
        Rake::Task["dependencies:lint:install"].invoke
      end
    end

    task :install do
      fold("install.swiftlint") do
        puts "Installing SwiftLint #{SWIFTLINT_VERSION} into #{swiftlint_path}"
        Dir.mktmpdir do |tmpdir|
          # Try first using a binary release
          zipfile = "#{tmpdir}/swiftlint-#{SWIFTLINT_VERSION}.zip"
          sh "curl --fail --location -o #{zipfile} https://github.com/realm/SwiftLint/releases/download/#{SWIFTLINT_VERSION}/portable_swiftlint.zip || true"
          if File.exists?(zipfile)
            extracted_dir = "#{tmpdir}/swiftlint-#{SWIFTLINT_VERSION}"
            sh "unzip #{zipfile} -d #{extracted_dir}"
            FileUtils.mkdir_p("#{swiftlint_path}/bin")
            FileUtils.cp("#{extracted_dir}/swiftlint", "#{swiftlint_path}/bin/swiftlint")
          else
            sh "git clone --quiet https://github.com/realm/SwiftLint.git #{tmpdir}"
            Dir.chdir(tmpdir) do
              sh "git checkout --quiet #{SWIFTLINT_VERSION}"
              sh "git submodule --quiet update --init --recursive"
              FileUtils.remove_entry_secure(swiftlint_path) if Dir.exist?(swiftlint_path)
              FileUtils.mkdir_p(swiftlint_path)
              sh "make prefix_install PREFIX='#{swiftlint_path}'"
            end
          end
        end
      end
    end
    CLOBBER << "vendor/swiftlint"
  end

end

CLOBBER << "vendor"

desc "Build #{XCODE_SCHEME}"
task :build => [:dependencies] do
  xcodebuild(:build)
end

desc "Profile build #{XCODE_SCHEME}"
task :buildprofile => [:dependencies] do
  ENV["verbose"] = "1"
  xcodebuild(:build, "OTHER_SWIFT_FLAGS='-Xfrontend -debug-time-compilation -Xfrontend -debug-time-expression-type-checking'")
end

task :timed_build => [:clean] do
  require 'benchmark'
  time = Benchmark.measure do
    Rake::Task["build"].invoke
  end
  puts "CPU Time: #{time.total}"
  puts "Wall Time: #{time.real}"
end

desc "Run test suite"
task :test => [:dependencies] do
  xcodebuild(:build, :test)
end

desc "Remove any temporary products"
task :clean do
  xcodebuild(:clean)
end

desc "Checks the source for style errors"
task :lint => %w[dependencies:lint:check] do
  swiftlint %w[lint --quiet]
end

namespace :lint do
  desc "Automatically corrects style errors where possible"
  task :autocorrect => %w[dependencies:lint:check] do
    swiftlint %w[autocorrect]
  end
end

namespace :git do
  hooks = %w[pre-commit post-checkout post-merge]

  desc "Install git hooks"
  task :install_hooks do
    hooks.each do |hook|
      target = hook_target(hook)
      source = hook_source(hook)
      backup = hook_backup(hook)

      next if File.symlink?(target) and File.readlink(target) == source
      next if File.file?(target) and File.identical?(target, source)
      if File.exist?(target)
        puts "Existing hook for #{hook}. Creating backup at #{target} -> #{backup}"
        FileUtils.mv(target, backup, :force => true)
      end
      FileUtils.ln_s(source, target)
      puts "Installed #{hook} hook"
    end
  end

  desc "Uninstall git hooks"
  task :uninstall_hooks do
    hooks.each do |hook|
      target = hook_target(hook)
      source = hook_source(hook)
      backup = hook_backup(hook)

      next unless File.symlink?(target) and File.readlink(target) == source
      puts "Removing hook for #{hook}"
      File.unlink(target)
      if File.exist?(backup)
        puts "Restoring hook for #{hook} from backup"
        FileUtils.mv(backup, target)
      end
    end
  end

  def hook_target(hook)
    ".git/hooks/#{hook}"
  end

  def hook_source(hook)
    "../../Scripts/hooks/#{hook}"
  end

  def hook_backup(hook)
    "#{hook_target(hook)}.bak"
  end
end

namespace :git do
  task :pre_commit => %[dependencies:lint:check] do
    begin
      swiftlint %w[lint --quiet --strict]
    rescue
      exit $?.exitstatus
    end
  end

  task :post_merge do
    check_dependencies_hook
  end

  task :post_checkout do
    check_dependencies_hook
  end
end

desc "Open the project in Xcode"
task :xcode => [:dependencies] do
  sh "open #{XCODE_WORKSPACE}"
end

def fold(label, &block)
  puts "travis_fold:start:#{label}" if is_travis?
  yield
  puts "travis_fold:end:#{label}" if is_travis?
end

def is_travis?
  return ENV["TRAVIS"] != nil
end

def pod(args)
  args = %w[bundle exec pod] + args
  sh(*args)
end

def lockfiles_match?
  File.file?('Pods/Manifest.lock') && FileUtils.compare_file('Podfile.lock', 'Pods/Manifest.lock')
end

def podfile_locked?
  podfile_checksum = Digest::SHA1.file("Podfile")
  lockfile_checksum = YAML.load(File.read("Podfile.lock"))["PODFILE CHECKSUM"]

  podfile_checksum == lockfile_checksum
end

def swiftlint_path
    "#{PROJECT_DIR}/vendor/swiftlint"
end

def swiftlint(args)
  args = [swiftlint_bin] + args
  sh(*args)
end

def swiftlint_bin
    "#{swiftlint_path}/bin/swiftlint"
end

def swiftlint_needs_install
  return true unless File.exist?(swiftlint_bin)
  installed_version = `"#{swiftlint_bin}" version`.chomp
  return (installed_version != SWIFTLINT_VERSION)
end

def xcodebuild(*build_cmds)
  cmd = "xcodebuild"
  cmd += " -destination 'platform=iOS Simulator,name=iPhone 6s'"
  cmd += " -sdk iphonesimulator"
  cmd += " -workspace #{XCODE_WORKSPACE}"
  cmd += " -scheme #{XCODE_SCHEME}"
  cmd += " -configuration #{xcode_configuration}"
  cmd += " "
  cmd += build_cmds.map(&:to_s).join(" ")
  cmd += " | bundle exec xcpretty -f `bundle exec xcpretty-travis-formatter` && exit ${PIPESTATUS[0]}" unless ENV['verbose']
  sh(cmd)
end

def xcode_configuration
  ENV['XCODE_CONFIGURATION'] || XCODE_CONFIGURATION
end

def command?(command)
  system("which #{command} > /dev/null 2>&1")
end
def dependency_failed(component)
  msg = "#{component} dependencies missing or outdated. "
  if ENV['DRY_RUN']
    msg += "Run rake dependencies to install them."
    fail msg
  else
    msg += "Installing..."
    puts msg
  end
end

def check_dependencies_hook
  ENV['DRY_RUN'] = "1"
  begin
    Rake::Task['dependencies'].invoke
  rescue Exception => e
    puts e.message
    exit 1
  end
end