From dd66493d70da4b9b2edc22d7273cb407f3cf3194 Mon Sep 17 00:00:00 2001 From: Tom Prats Date: Thu, 17 Nov 2016 17:42:11 -0500 Subject: Updated Sprockets Documentation --- guides/source/asset_pipeline.md | 32 +++++++++++--------------------- 1 file changed, 11 insertions(+), 21 deletions(-) (limited to 'guides/source/asset_pipeline.md') diff --git a/guides/source/asset_pipeline.md b/guides/source/asset_pipeline.md index 41dfeea84d..25717e04e4 100644 --- a/guides/source/asset_pipeline.md +++ b/guides/source/asset_pipeline.md @@ -1227,35 +1227,25 @@ Sprockets. Making Your Library or Gem a Pre-Processor ------------------------------------------ -As Sprockets uses [Tilt](https://github.com/rtomayko/tilt) as a generic -interface to different templating engines, your gem should just implement the -Tilt template protocol. Normally, you would subclass `Tilt::Template` and -reimplement the `prepare` method, which initializes your template, and the -`evaluate` method, which returns the processed source. The original source is -stored in `data`. Have a look at -[`Tilt::Template`](https://github.com/rtomayko/tilt/blob/master/lib/tilt/template.rb) -sources to learn more. +Sprockets uses Processors, Transformers, Compressors, and Exporters to extend +Sprockets functionality. Have a look at +[Extending Sprockets](https://github.com/rails/sprockets/blob/master/guides/extending_sprockets.md) +to learn more. Here we registered a preprocessor to add a comment to the end +of text/css (.css) files. ```ruby -module BangBang - class Template < ::Tilt::Template - def prepare - # Do any initialization here - end - - # Adds a "!" to original template. - def evaluate(scope, locals, &block) - "#{data}!" - end +module AddComment + def self.call(input) + { data: input[:data] + "/* Hello From my sprockets extension */" } end end ``` -Now that you have a `Template` class, it's time to associate it with an -extension for template files: +Now that you have a module that modifies the input data, it's time to register +it as a preprocessor for your mime type. ```ruby -Sprockets.register_engine '.bang', BangBang::Template +Sprockets.register_preprocessor 'text/css', AddComment ``` Upgrading from Old Versions of Rails -- cgit v1.2.3