GuardFile

# A sample Guardfile
# More info at https://github.com/guard/guard#readme

## Uncomment and set this to only include directories you want to watch
# directories %w(app lib config test spec features) \
#  .select{|d| Dir.exists?(d) ? d : UI.warning("Directory #{d} does not exist")}

## Note: if you are using the `directories` clause above and you are not
## watching the project directory ('.'), then you will want to move
## the Guardfile to a watched dir and symlink it back, e.g.
#
#  $ mkdir config
#  $ mv Guardfile config/
#  $ ln -s config/Guardfile .
#
# and, you'll have to watch "config/Guardfile" instead of "Guardfile"

guard 'livereload' do
 extensions = {
   css: :css,
   scss: :css,
   sass: :css,
   js: :js,
   html: :html,
   png: :png,
   gif: :gif,
   jpg: :jpg,
   jpeg: :jpeg,
   # less: :less, # uncomment if you want LESS stylesheets done in browser
 }

 rails_view_exts = %w(erb haml slim)

 # file types LiveReload may optimize refresh for
 compiled_exts = extensions.values.uniq
 watch(%r{public/.+\.(#{compiled_exts * '|'})})

 extensions.each do |ext, type|
   watch(%r{
         (?:app|vendor)
         (?:/assets/\w+/(?<path>[^.]+) # path+base without extension
          (?<ext>\.#{ext})) # matching extension (must be first encountered)
         (?:\.\w+|$) # other extensions
         }x) do |m|
     path = m[1]
     "/assets/#{path}.#{type}"
   end
 end

 # file needing a full reload of the page anyway
 watch(%r{app/views/.+\.(#{rails_view_exts * '|'})$})
 watch(%r{app/helpers/.+\.rb})
 watch(%r{config/locales/.+\.yml})

 # from https://mattbrictson.com/lightning-fast-sass-reloading-in-rails
 watch(%r{app/views/.+\.(erb|haml|slim)$})
 watch(%r{app/helpers/.+\.rb})
 watch(%r{public/.+\.(css|js|html)})
 watch(%r{config/locales/.+\.yml})
 # Rails Assets Pipeline
 watch(%r{(app|vendor)(/assets/\w+/(.+\.(css|js|html|png|jpg))).*}) { |m| "/assets/#{m[3]}" }
 watch(%r{(app|vendor)(/assets/\w+/(.+)\.(scss))}) { |m| "/assets/#{m[3]}.css" }
end