Upgrade the Listen gem

Gemfile

@@ -122,7 +122,7 @@ end
 group :test, :development do
   gem 'rspec'
   gem 'mock_redis'
-  gem 'listen', '0.7.3', require: false
+  gem 'listen', require: false
   gem 'certified', require: false
   # later appears to break Fabricate(:topic, category: category)
   gem 'fabrication', '2.9.8', require: false

Gemfile.lock

@@ -137,7 +137,10 @@ GEM
     jwt (1.5.6)
     kgio (2.10.0)
     libv8 (5.3.332.38.5)
-    listen (0.7.3)
+    listen (3.1.5)
+      rb-fsevent (~> 0.9, >= 0.9.4)
+      rb-inotify (~> 0.9, >= 0.9.7)
+      ruby_dep (~> 1.2)
     logster (1.2.7)
     loofah (2.0.3)
       nokogiri (>= 1.5.9)
@@ -312,6 +315,7 @@ GEM
     ruby-readability (0.7.0)
       guess_html_encoding (>= 0.0.4)
       nokogiri (>= 1.6.0)
+    ruby_dep (1.5.0)
     sanitize (4.4.0)
       crass (~> 1.0.2)
       nokogiri (>= 1.4.4)
@@ -409,7 +413,7 @@ DEPENDENCIES
   htmlentities
   http_accept_language (~> 2.0.5)
   image_optim
-  listen (= 0.7.3)
+  listen
   logster
   lru_redux
   mail

lib/autospec/manager.rb

@@ -179,12 +179,14 @@ class Autospec::Manager
       puts "@@@@@@@@@ Listen to #{path}/#{watch} #{options}" if @debug
       Thread.new do
         begin
-          Listen.to("#{path}/#{watch}", options) do |modified, added, _|
+          listener = Listen.to("#{path}/#{watch}", options) do |modified, added, _|
             paths = [modified, added].flatten
             paths.compact!
             paths.map!{|long| long[(path.length+1)..-1]}
             process_change(paths)
           end
+          listener.start
+          sleep
         rescue => e
           puts "FAILED to listen on changes to #{path}/#{watch}"
           puts e

lib/stylesheet/watcher.rb

@@ -31,7 +31,7 @@ module Stylesheet
       @paths.each do |watch|
         Thread.new do
           begin
-            Listen.to("#{root}/#{watch}") do |modified, added, _|
+            listener = Listen.to("#{root}/#{watch}", ignore: /xxxx/) do |modified, added, _|
               paths = [modified, added].flatten
               paths.compact!
               paths.map!{|long| long[(root.length+1)..-1]}
@@ -40,6 +40,8 @@ module Stylesheet
           rescue => e
             STDERR.puts "Failed to listen for CSS changes at: #{watch}\n#{e}"
           end
+          listener.start
+          sleep
         end
       end
     end