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LICENSE

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+Copyright (c) 2011 Kristofor Selden
+
+Permission is hereby granted, free of charge, to any person obtaining a
+copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+

README.md

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+Guard::Rsync
+===========
+
+Rsync guard allows to automatically sync directories when source file
+changes.
+
+Focus of this guard task is to sync directories while excluding
+autogenerated files and their sources.
+
+Install
+-------
+
+Please be sure to have [Guard](https://github.com/guard/guard) installed before continue.
+
+Install the gem:
+
+    $ gem install guard-rsync
+
+Add it to your Gemfile (inside development group):
+
+``` ruby
+gem 'guard-rsync'
+```
+
+Usage
+-----
+
+Please read [Guard usage doc](https://github.com/guard/guard#readme)
+
+Guardfile
+---------
+
+The following example pairs the coffeescript guard with a rsync guard.
+
+``` ruby
+group(:build_my_app) do
+  guard('rsync', {
+    :input => 'apps_src/my_app',
+    :output => 'apps',
+    :excludes => {
+      /(.+)\.coffee$/ => (lambda {|m| "#{m[1]}.js"})
+    },
+    :run_group_on_start => true
+  }) do
+    watch(%r{^apps_src/my_app/(.+\.(?!coffee)(.*)|[^.]+)$})
+  end
+
+  guard 'coffeescript', :input => 'apps_src/my_app', :output => 'apps/my_app'
+end
+```
+
+Author
+------
+
+[Kristofor Selden](https://github.com/kselden)
+

guard-rsync.gemspec

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+Gem::Specification.new do |s|
+  s.name        = 'guard-rsync'
+  s.version     = '0.1.0'
+  s.platform    = Gem::Platform::RUBY
+  s.authors     = ['Kris Selden']
+  s.email       = ['kris.selden@gmail.com']
+  s.homepage    = 'http://github.com/kselden/guard-rsync'
+  s.summary     = 'Guard gem for syncing directories'
+  s.description = 'Guard::Rsync automatically syncs directories.'
+
+  s.required_rubygems_version = '>= 1.3.6'
+  s.rubyforge_project = 'guard-rsync'
+
+  s.add_dependency 'guard', '>= 0.4'
+  s.add_development_dependency 'bundler',     '~> 1.0'
+
+  s.files        = Dir.glob('{lib}/**/*') + %w[LICENSE README.md]
+  s.require_path = 'lib'
+end

lib/guard/rsync.rb

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+require 'guard'
+require 'guard/guard'
+require 'guard/watcher'
+require 'tempfile'
+
+module Guard
+
+  # The CoffeeScript guard that gets notifications about the following
+  # Guard events: `start`, `stop`, `reload`, `run_all` and `run_on_change`.
+  #
+  class Rsync < Guard
+    # Initialize Guard::Sync.
+    #
+    # @param [Array<Guard::Watcher>] watchers the watchers in the Guard block
+    # @param [Hash] options the options for the Guard
+    # @option options [String] :input the input directory
+    # @option options [String] :output the output directory
+    # @option options [Hash] :excludes the map of excludes patterns in the
+    #         input directory to exclude files in the output directory.
+    def initialize(watchers = [], options = { })
+      @input = options[:input]
+      @output = options[:output]
+      @excludes = options[:excludes]
+      @run_group_on_start = options[:run_group_on_start]
+      super
+    end
+
+    # Call once when guard starts
+    def start
+      run_all
+      if @run_group_on_start
+        ::Guard.guards.each do |guard|
+          guard.run_all if self != guard && group == guard.group
+        end
+      end
+    end
+
+    # Gets called when rsync should be run.
+    #
+    # @return [Boolean] rsync was successful
+    def run_all
+      run_on_change([])
+    end
+
+    # Gets called when watched paths and files have changes.
+    #
+    # @param [Array<String>] paths the changed paths and files
+    # @return [Boolean] rsync was successful
+    def run_on_change(paths)
+      input_excludes = []
+      output_excludes = []
+      Dir.chdir(@input) do
+        Dir.glob('**/*').each do |file|
+          @excludes.each do |pattern, transform|
+            matches = file.match(pattern)
+            if matches
+              input_excludes << file
+              output_excludes << transform.call(matches) if transform
+            end
+          end
+        end
+      end
+      exclude_file = Tempfile.new('exclude')
+      begin
+        exclude_file.puts(input_excludes)
+        exclude_file.puts(output_excludes)
+        exclude_file.puts(::Guard.listener.ignore_paths)
+        exclude_file.flush
+        UI.info `rsync -av --delete --exclude-from "#{exclude_file.path}" "#{@input}" "#{@output}"`
+        success = $?.success?
+        return success
+      ensure
+         exclude_file.close
+         exclude_file.unlink
+      end
+    end
+
+  end
+end
+