igable · December 31, 2015 16:29 · Dec 17, 2013 · Dec 17, 2013
diff --git a/watch.rb b/watch.rb
@@ -18,9 +18,17 @@
 
 while true do
   files = []
-  filetypes.each {|type|
-    files += Dir.glob( File.join( watch_folder, "**", "*.#{type}" ) )
-  }
+
+  if File.directory?(watch_folder)
+    filetypes.each {|type|
+      files += Dir.glob( File.join( watch_folder, "**", "*.#{type}" ) )
+    }
+  else
+    # watch a single file only. useful in cases like Jekyll where every file is
+    # touched each time we generate the site
+    files += Dir.glob(File.absolute_path(watch_folder))
+  end
+
   new_hash = files.collect {|f| [ f, File.stat(f).mtime.to_i ] }
   hash ||= new_hash
   diff_hash = new_hash - hash

diff --git a/watch.rb b/watch.rb
@@ -0,0 +1,51 @@
+#!/usr/bin/env ruby
+# watch.rb by Brett Terpstra, 2011 <http://brettterpstra.com>
+# with credit to Carlo Zottmann <https://github.com/carlo/haml-sass-file-watcher>
+
+trap("SIGINT") { exit }
+
+if ARGV.length < 2
+  puts "Usage: #{$0} watch_folder keyword"
+  puts "Example: #{$0} . mywebproject"
+  exit
+end
+
+dev_extension = 'dev'
+filetypes = ['css','html','htm','php','rb','erb','less','js']
+watch_folder = ARGV[0]
+keyword = ARGV[1]
+puts "Watching #{watch_folder} and subfolders for changes in project files..."
+
+while true do
+  files = []
+  filetypes.each {|type|
+    files += Dir.glob( File.join( watch_folder, "**", "*.#{type}" ) )
+  }
+  new_hash = files.collect {|f| [ f, File.stat(f).mtime.to_i ] }
+  hash ||= new_hash
+  diff_hash = new_hash - hash
+
+  unless diff_hash.empty?
+    hash = new_hash
+
+    diff_hash.each do |df|
+      puts "Detected change in #{df[0]}, refreshing"
+      %x{osascript<<ENDGAME
+        	tell application "Safari"
+          	set windowList to every window
+          	repeat with aWindow in windowList
+          		set tabList to every tab of aWindow
+          		repeat with atab in tabList
+          			if (URL of atab contains "#{keyword}") then
+          			  tell atab to do javascript "window.location.reload()"
+          			end if
+          		end repeat
+          	end repeat
+        	end tell
+ENDGAME
+}
+    end
+  end
+
+  sleep 1
+end
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