master/lib/guard/listener.rb
Thibaud Guillaume-Gentil 4d3744ff43 Initial commit
2010-10-03 23:00:33 +02:00

64 lines
1.3 KiB
Ruby

require 'sys/uname'
module Guard
class Listener
attr_reader :last_event, :callback, :pipe
def initialize
update_last_event
end
def on_change(&block)
@callback = block
end
def start
@pipe = case Sys::Uname.sysname
when 'Darwin'
IO.popen("#{bin_path}/fsevent_watch .")
when 'Linux'
IO.popen("#{bin_path}/inotify_watch .")
end
watch_change
end
def stop
Process.kill("HUP", pipe.pid) if pipe
end
private
def watch_change
while !pipe.eof?
if line = pipe.readline
modified_dirs = line.split(" ")
files = modified_files(modified_dirs)
update_last_event
callback.call(files)
end
end
end
def modified_files(dirs)
files = potentially_modified_files(dirs).select { |file| recent_file?(file) }
files.map! { |file| file.gsub("#{Dir.pwd}/", '') }
end
def potentially_modified_files(dirs)
Dir.glob(dirs.map { |dir| "#{dir}*" })
end
def recent_file?(file)
File.mtime(file) >= last_event
end
def update_last_event
@last_event = Time.now
end
def bin_path
File.expand_path(File.join(File.dirname(__FILE__), '..', '..', 'bin'))
end
end
end