Class: VagrantReflect::Command::Reflect

Inherits:
Object
  • Object
show all
Includes:
Vagrant::Action::Builtin::MixinSyncedFolders
Defined in:
lib/vagrant-reflect/command/reflect.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.synopsis ⇒ Object 



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# File 'lib/vagrant-reflect/command/reflect.rb', line 18

def self.synopsis
  'a better rsync-auto'
end

Instance Method Details

#callback(path, opts, options, modified, added, removed) ⇒ Object

This is the callback that is called when any changes happen



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# File 'lib/vagrant-reflect/command/reflect.rb', line 162

def callback(path, opts, options, modified, added, removed)
  @logger.info("File change callback called for #{path}!")
  @logger.info("  - Modified: #{modified.inspect}")
  @logger.info("  - Added: #{added.inspect}")
  @logger.info("  - Removed: #{removed.inspect}")

  callback = options[:incremental] ? :sync_incremental : :sync_full

  # Perform the sync for each machine
  opts.each do |path_opts|
    begin
      # If disabled incremental, do a full
      send callback, path, path_opts, modified, added, removed

      path_opts[:machine].ui.info(
        I18n.t('vagrant.plugins.vagrant-reflect.rsync_auto_synced'))
    rescue Vagrant::Errors::MachineGuestNotReady
      # Error communicating to the machine, probably a reload or
      # halt is happening. Just notify the user but don't fail out.
      path_opts[:machine].ui.error(
        I18n.t('vagrant.plugins.vagrant-reflect.'\
               'rsync_communicator_not_ready_callback'))
    rescue Vagrant::Errors::VagrantError => e
      path_opts[:machine].ui.error(e.message)
    end
  end
end

#execute ⇒ Object 



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# File 'lib/vagrant-reflect/command/reflect.rb', line 22

def execute
  @logger = Log4r::Logger.new('vagrant::commands::reflect')

  options = {
    poll:        false,
    incremental: true
  }
  opts = OptionParser.new do |o|
    o.banner = 'Usage: vagrant reflect [vm-name]'
    o.separator ''
    o.separator 'Options:'
    o.separator ''

    o.on('--[no-]poll', 'Force polling filesystem (slow)') do |poll|
      options[:poll] = poll
    end
    o.on(
      '--[no-]incremental',
      'Perform incremental copies of changes where possible (fast)'
    ) do |incremental|
      options[:incremental] = incremental
    end
  end

  # Parse the options and return if we don't have any target.
  argv = parse_options(opts)
  return unless argv

  # Build up the paths that we need to listen to.
  paths = {}
  with_target_vms(argv) do |machine|
    if machine.provider.capability?(:proxy_machine)
      proxy = machine.provider.capability(:proxy_machine)
      if proxy
        machine.ui.warn(
          I18n.t(
            'vagrant.plugins.vagrant-reflect.rsync_proxy_machine',
            name: machine.name.to_s,
            provider: machine.provider_name.to_s))

        machine = proxy
      end
    end

    cached = synced_folders(machine, cached: true)
    fresh  = synced_folders(machine)
    diff   = synced_folders_diff(cached, fresh)
    unless diff[:added].empty?
      machine.ui.warn(
        I18n.t('vagrant.plugins.vagrant-reflect.rsync_auto_new_folders'))
    end

    folders = cached[:rsync]
    next if !folders || folders.empty?

    folders.each do |id, folder_opts|
      # If we marked this folder to not auto sync, then
      # don't do it.
      next if folder_opts.key?(:auto) && !folder_opts[:auto]

      # Push on .vagrant exclude
      folder_opts = folder_opts.dup
      folder_opts[:exclude] ||= []
      folder_opts[:exclude] << '.vagrant/'

      syncer = Syncer.new(machine, folder_opts)

      machine.ui.info(
        I18n.t('vagrant.plugins.vagrant-reflect.rsync_auto_initial'))
      syncer.sync_full

      hostpath = folder_opts[:hostpath]
      hostpath = File.expand_path(hostpath, machine.env.root_path)
      paths[hostpath] ||= []
      paths[hostpath] << {
        id:      id,
        machine: machine,
        opts:    folder_opts,
        syncer:  syncer
      }
    end
  end

  # Exit immediately if there is nothing to watch
  if paths.empty?
    @env.ui.info(
      I18n.t('vagrant.plugins.vagrant-reflect.rsync_auto_no_paths'))
    return 1
  end

  @logger.info(
    "Listening via: #{Driskell::Listen::Adapter.select.inspect}")

  # Create a listener for each path so the callback can easily
  # distinguish which path changed
  listeners = paths.keys.sort.collect do |path|
    opts = paths[path]
    callback = method(:callback).to_proc.curry[path][opts][options]

    ignores = []
    opts.each do |path_opts|
      ignores += path_opts[:syncer].excludes_to_regexp
      path_opts[:machine].ui.info(
        I18n.t(
          'vagrant.plugins.vagrant-reflect.rsync_auto_path',
          path: path.to_s))
    end

    @logger.info("Listening to path: #{path}")
    @logger.info("Ignoring #{ignores.length} paths:")
    ignores.each do |ignore|
      @logger.info("-- #{ignore}")
    end

    listopts = { ignore: ignores, force_polling: options[:poll] }
    Driskell::Listen.to(path, listopts, &callback)
  end

  # Create the callback that lets us know when we've been interrupted
  queue    = Queue.new
  callback = lambda do
    # This needs to execute in another thread because Thread
    # synchronization can't happen in a trap context.
    Thread.new { queue << true }
  end

  # Run the listeners in a busy block so that we can cleanly
  # exit once we receive an interrupt.
  Vagrant::Util::Busy.busy(callback) do
    listeners.each(&:start)
    queue.pop
    listeners.each do |listener|
      listener.stop if listener.state != :stopped
    end
  end

  0
end

#strip_path(path, item) ⇒ Object 



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# File 'lib/vagrant-reflect/command/reflect.rb', line 240

def strip_path(path, item)
  item[path.length..-1]
end

#strip_paths(path, items) ⇒ Object 



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# File 'lib/vagrant-reflect/command/reflect.rb', line 234

def strip_paths(path, items)
  items.map do |item|
    item[path.length..-1]
  end
end

#sync_full(path, path_opts, modified, added, removed) ⇒ Object 



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# File 'lib/vagrant-reflect/command/reflect.rb', line 190

def sync_full(path, path_opts, modified, added, removed)
  [modified, added].flatten.each do |change|
    path_opts[:machine].ui.info(
      I18n.t(
        'vagrant.plugins.vagrant-reflect.rsync_auto_full_change',
        path: strip_path(path, change)))
  end

  removed.each do |remove|
    path_opts[:machine].ui.info(
      I18n.t(
        'vagrant.plugins.vagrant-reflect.rsync_auto_full_remove',
        path: strip_path(path, remove)))
  end

  path_opts[:machine].ui.info(
    I18n.t('vagrant.plugins.vagrant-reflect.rsync_auto_full'))

  path_opts[:syncer].sync_full
end

#sync_incremental(path, path_opts, modified, added, removed) ⇒ Object 



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# File 'lib/vagrant-reflect/command/reflect.rb', line 211

def sync_incremental(path, path_opts, modified, added, removed)
  if !modified.empty? || !added.empty?
    # Pass the list of changes to rsync so we quickly synchronise only
    # the changed files instead of the whole folder
    items = strip_paths(path, modified + added)
    path_opts[:syncer].sync_incremental(items) do |item|
      path_opts[:machine].ui.info(
        I18n.t('vagrant.plugins.vagrant-reflect.rsync_auto_increment_change',
               path: item))
    end
  end

  return if removed.empty?

  # Pass list of changes to a remove command
  items = strip_paths(path, removed)
  path_opts[:syncer].sync_removals(items) do |item|
    path_opts[:machine].ui.info(
      I18n.t('vagrant.plugins.vagrant-reflect.rsync_auto_increment_remove',
             path: item))
  end
end