discourse/lib/freedom_patches/sprockets_patches.rb

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# frozen_string_literal: true
# This contains two patches to make sprockets more tolerable in dev
#
# 1. Stop computing asset paths which triggers sprockets to do mountains of work
# All our assets in dev are in the /assets folder anyway
#
# 2. Stop using a concatenator that does tons of work checking for semicolons when
# when rebuilding an asset
module FreedomPatches
module SprocketsPatches
def self.concat_javascript_sources(buf, source)
if buf.bytesize > 0
# CODE REMOVED HERE
buf << ";" # unless string_end_with_semicolon?(buf)
buf << "\n" # unless buf.end_with?("\n")
end
buf << source
end
if Rails.env.development? || Rails.env.test?
Sprockets.register_bundle_metadata_reducer "application/javascript",
:data,
proc { +"" },
method(:concat_javascript_sources)
end
end
end
if Rails.env.development? || Rails.env.test?
ActiveSupport.on_load(:action_view) do
def compute_asset_path(source, _options = {})
"/assets/#{source}"
end
alias_method :public_compute_asset_path, :compute_asset_path
end
end
# By default, the Sprockets DirectiveProcessor introduces a newline between possible 'header' comments
# and the rest of the JS file. (https://github.com/rails/sprockets/blob/f4d3dae71e/lib/sprockets/directive_processor.rb#L121)
# This causes sourcemaps to be offset by 1 line, and therefore breaks browser tooling.
# We know that Ember-Cli assets do not use Sprockets directives, so we can totally bypass the DirectiveProcessor for those files.
Sprockets::DirectiveProcessor.prepend(
Module.new do
def process_source(source)
return source, [] if EmberCli.is_ember_cli_asset?(File.basename(@filename))
super
end
end,
)
# Skip digest path for workbox assets. They are already in a folder with a digest in the name.
Sprockets::Asset.prepend(
Module.new do
def digest_path
return logical_path if logical_path.match?(%r{^workbox-.*/})
super
end
end,
)