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Fixed rake assets:precompile task

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assets.rake
Ruby
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desc "Compile all the assets named in config.assets.precompile"
task :precompile do
# We need to do this dance because RAILS_GROUPS is used
# too early in the boot process and changing here is already too late.
if ENV["RAILS_GROUPS"].to_s.empty? || ENV["RAILS_ENV"].to_s.empty?
ENV["RAILS_GROUPS"] ||= "assets"
ENV["RAILS_ENV"] ||= "production"
Kernel.exec $0, *ARGV
else
Rake::Task["environment"].invoke
 
# Ensure that action view is loaded and the appropriate sprockets hooks get executed
ActionView::Base
 
# Always calculate digests and compile files
Rails.application.config.assets.digest = true
Rails.application.config.assets.compile = true
 
config = Rails.application.config
env = Rails.application.assets
target = Pathname.new(File.join(Rails.public_path, config.assets.prefix))
manifest = {}
manifest_path = config.assets.manifest || target
 
config.assets.precompile.each do |path|
env.each_logical_path do |logical_path|
if path.is_a?(Regexp)
next unless path.match(logical_path)
else
next unless File.fnmatch(path.to_s, logical_path)
end
 
if asset = env.find_asset(logical_path)
manifest[logical_path] = asset.digest_path
filename = target.join(asset.digest_path)
mkdir_p filename.dirname
asset.write_to(filename)
asset.write_to("#{filename}.gz") if filename.to_s =~ /\.(css|js)$/
end
end
end
 
File.open("#{manifest_path}/manifest.yml", 'w') do |f|
YAML.dump(manifest, f)
end
end
end

Kernel.exec doesn't seem to work in Windows environments. To work around, I had to use the command like this:
bundle exec rake RAILS_ENV=production RAILS_GROUPS=assets precompile

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