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Contents
require 'pathname'
module AutoprefixerRails
# Register autoprefixer postprocessor in Sprockets and fix common issues
class Sprockets
def initialize(processor)
@processor = processor
end
# Add prefixes for `css`
def process(context, css)
root = Pathname.new(context.root_path)
input = context.pathname.relative_path_from(root).to_s
output = input.chomp(File.extname(input)) + '.css'
@processor.process(css, from: input, to: output).css
end
# Add prefixes only if in `content` will be CSS.
def process_only_css(context, content)
begin
process(context, content)
rescue ExecJS::ProgramError => e
if e.message =~ /Can't parse CSS/
content
else
raise e
end
end
end
# Register postprocessor in Sprockets depend on issues with other gems
def install(assets)
if ignore_syntax_error?
register(assets) { |context, css| process_only_css(context, css) }
else
register(assets) { |context, css| process(context, css) }
end
end
private
# Add `block` as `assets` postprocessor
def register(assets, &block)
assets.register_postprocessor('text/css', :autoprefixer, &block)
end
# Return true if broken sass-rails is loaded
def ignore_syntax_error?
return false unless defined? Sass::Rails
fixed = Gem::Version.new('4.0.1')
current = Gem::Version.new(Sass::Rails::VERSION)
current < fixed
end
end
end
Version data entries
32 entries across 32 versions & 1 rubygems