discourse/lib/tasks/assets.rake

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task 'assets:precompile:before' do
require 'uglifier'
unless %w{profile production}.include? Rails.env
raise "rake assets:precompile should only be run in RAILS_ENV=production, you are risking unminified assets"
end
# Ensure we ALWAYS do a clean build
# We use many .erbs that get out of date quickly, especially with plugins
puts "Purging temp files"
`rm -fr #{Rails.root}/tmp/cache`
if Rails.configuration.assets.js_compressor == :uglifier && !`which uglifyjs`.empty? && !ENV['SKIP_NODE_UGLIFY']
$node_uglify = true
end
puts "Bundling assets"
# in the past we applied a patch that removed asset postfixes, but it is terrible practice
# leaving very complicated build issues
# https://github.com/rails/sprockets-rails/issues/49
require 'sprockets'
require 'digest/sha1'
# Needed for proper source maps with a CDN
load "#{Rails.root}/lib/global_path.rb"
include GlobalPath
if $node_uglify
# monkey patch asset pipeline not to gzip, compress: false is broken
class ::Sprockets::Asset
# Save asset to disk.
def write_to(filename, options = {})
# Gzip contents if filename has '.gz'
return if File.extname(filename) == '.gz'
begin
FileUtils.mkdir_p File.dirname(filename)
File.open("#{filename}+", 'wb') do |f|
f.write to_s
end
# Atomic write
FileUtils.mv("#{filename}+", filename)
# Set mtime correctly
File.utime(mtime, mtime, filename)
nil
ensure
# Ensure tmp file gets cleaned up
FileUtils.rm("#{filename}+") if File.exist?("#{filename}+")
end
end
end
module ::Sprockets
class UglifierCompressor
def evaluate(context, locals, &block)
# monkey patch cause we do this later, no idea how to cleanly disable
data
end
end
end
end
end
task 'assets:precompile:css' => 'environment' do
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if ENV["DONT_PRECOMPILE_CSS"] == "1"
STDERR.puts "Skipping CSS precompilation, ensure CSS lives in a shared directory across hosts"
else
STDERR.puts "Start compiling CSS: #{Time.zone.now}"
RailsMultisite::ConnectionManagement.each_connection do |db|
# Heroku precompiles assets before db migration, so tables may not exist.
# css will get precompiled during first request instead in that case.
if ActiveRecord::Base.connection.table_exists?(ColorScheme.table_name)
STDERR.puts "Compiling css for #{db}"
[:desktop, :mobile, :desktop_rtl, :mobile_rtl].each do |target|
STDERR.puts "target: #{target} #{DiscourseStylesheets.compile(target)}"
end
end
end
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STDERR.puts "Done compiling CSS: #{Time.zone.now}"
end
end
def assets_path
"#{Rails.root}/public/assets"
end
def compress_node(from,to)
to_path = "#{assets_path}/#{to}"
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assets = cdn_relative_path("/assets")
source_map_root = assets + ((d=File.dirname(from)) == "." ? "" : "/#{d}")
source_map_url = cdn_path "/assets/#{to}.map"
cmd = "uglifyjs '#{assets_path}/#{from}' -p relative -c -m -o '#{to_path}' --source-map-root '#{source_map_root}' --source-map '#{assets_path}/#{to}.map' --source-map-url '#{source_map_url}'"
STDERR.puts cmd
result = `#{cmd} 2>&1`
unless $?.success?
STDERR.puts result
exit 1
end
result
end
def compress_ruby(from,to)
data = File.read("#{assets_path}/#{from}")
uglified, map = Uglifier.new(comments: :none,
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screw_ie8: true,
source_filename: File.basename(from),
output_filename: File.basename(to)
)
.compile_with_map(data)
dest = "#{assets_path}/#{to}"
File.write(dest, uglified << "\n//# sourceMappingURL=#{cdn_path "/assets/#{to}.map"}")
File.write(dest + ".map", map)
end
def gzip(path)
STDERR.puts "gzip #{path}"
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STDERR.puts `gzip -f -c -7 #{path} > #{path}.gz`
end
def compress(from,to)
if @has_uglifyjs ||= !`which uglifyjs`.empty?
compress_node(from,to)
else
compress_ruby(from,to)
end
end
task 'assets:precompile' => 'assets:precompile:before' do
# Run after assets:precompile
Rake::Task["assets:precompile:css"].invoke
if $node_uglify
puts "Compressing Javascript and Generating Source Maps"
manifest = Sprockets::Manifest.new(assets_path)
to_skip = Rails.configuration.assets.skip_minification || []
manifest.files
.select{|k,v| k =~ /\.js$/}
.each do |file, info|
path = "#{assets_path}/#{file}"
_file = (d = File.dirname(file)) == "." ? "_#{file}" : "#{d}/_#{File.basename(file)}"
_path = "#{assets_path}/#{_file}"
if File.exists?(_path)
STDERR.puts "Skipping: #{file} already compressed"
else
STDERR.puts "Compressing: #{file}"
# We can specify some files to never minify
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unless (ENV["DONT_MINIFY"] == "1") || to_skip.include?(info['logical_path'])
FileUtils.mv(path, _path)
compress(_file,file)
end
info["size"] = File.size(path)
info["mtime"] = File.mtime(path).iso8601
gzip(path)
end
end
# protected
manifest.send :save
end
end