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# frozen_string_literal: true
require 'listen/thread'
module Listen
module Adapter
# Adapter implementation for Mac OS X `FSEvents`.
#
class Darwin < Base
OS_REGEXP = /darwin(?<major_version>(1|2)\d+)/i.freeze
# The default delay between checking for changes.
DEFAULTS = { latency: 0.1 }.freeze
INCOMPATIBLE_GEM_VERSION = <<-EOS.gsub(/^ {8}/, '')
rb-fsevent > 0.9.4 no longer supports OS X 10.6 through 10.8.
Please add the following to your Gemfile to avoid polling for changes:
require 'rbconfig'
if RbConfig::CONFIG['target_os'] =~ /darwin(1[0-3])/i
gem 'rb-fsevent', '<= 0.9.4'
end
EOS
def self.usable?
version = RbConfig::CONFIG['target_os'][OS_REGEXP, :major_version]
return false unless version
return true if version.to_i >= 13 # darwin13 is OS X 10.9
require 'rb-fsevent'
fsevent_version = Gem::Version.new(FSEvent::VERSION)
return true if fsevent_version <= Gem::Version.new('0.9.4')
Listen.adapter_warn(INCOMPATIBLE_GEM_VERSION)
false
end
private
def _configure(dir, &callback)
@callbacks[dir] = callback
end
def _run
require 'rb-fsevent'
worker = FSEvent.new
dirs_to_watch = @callbacks.keys.map(&:to_s)
Listen.logger.info { "fsevent: watching: #{dirs_to_watch.inspect}" }
worker.watch(dirs_to_watch, { latency: options.latency }, &method(:_process_changes))
@worker_thread = Listen::Thread.new("worker_thread") { worker.run }
end
def _process_changes(dirs)
dirs.each do |dir|
dir = Pathname.new(dir.sub(%r{/$}, ''))
@callbacks.each do |watched_dir, callback|
if watched_dir.eql?(dir) || Listen::Directory.ascendant_of?(watched_dir, dir)
callback.call(dir)
end
end
end
end
def _process_event(dir, path)
Listen.logger.debug { "fsevent: processing path: #{path.inspect}" }
# TODO: does this preserve symlinks?
rel_path = path.relative_path_from(dir).to_s
_queue_change(:dir, dir, rel_path, recursive: true)
end
def _stop
@worker_thread&.kill
super
end
end
end
end
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