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Contents
module Sass
module Plugin
# Rack middleware for compiling Sass code.
#
# ## Activate
#
# require 'sass/plugin/rack'
# use Sass::Plugin::Rack
#
# ## Customize
#
# Sass::Plugin.options.merge(
# :cache_location => './tmp/sass-cache',
# :never_update => environment != :production,
# :full_exception => environment != :production)
#
# {file:SASS_REFERENCE.md#options See the Reference for more options}.
#
# ## Use
#
# Put your Sass files in `public/stylesheets/sass`.
# Your CSS will be generated in `public/stylesheets`,
# and regenerated every request if necessary.
# The locations and frequency {file:SASS_REFERENCE.md#options can be customized}.
# That's all there is to it!
class Rack
# The delay, in seconds, between update checks.
# Useful when many resources are requested for a single page.
# `nil` means no delay at all.
#
# @return [Float]
attr_accessor :dwell
# Initialize the middleware.
#
# @param app [#call] The Rack application
# @param dwell [Float] See \{#dwell}
def initialize(app, dwell = 1.0)
@app = app
@dwell = dwell
@check_after = Time.now.to_f
end
# Process a request, checking the Sass stylesheets for changes
# and updating them if necessary.
#
# @param env The Rack request environment
# @return [(#to_i, {String => String}, Object)] The Rack response
def call(env)
if @dwell.nil? || Time.now.to_f > @check_after
Sass::Plugin.check_for_updates
@check_after = Time.now.to_f + @dwell if @dwell
end
@app.call(env)
end
end
end
end
require 'sass/plugin'
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