mirror of
https://github.com/discourse/discourse.git
synced 2024-12-15 17:53:45 +08:00
83 lines
2.2 KiB
Ruby
83 lines
2.2 KiB
Ruby
require_dependency 'sass/discourse_sass_importer'
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require 'pathname'
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module Sass::Script::Functions
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def _error(message)
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raise Sass::SyntaxError, mesage
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end
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end
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class DiscourseSassCompiler
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def self.compile(scss, target, opts={})
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self.new(scss, target).compile(opts)
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end
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# Takes a Sass::SyntaxError and generates css that will show the
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# error at the bottom of the page.
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def self.error_as_css(sass_error, label)
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error = sass_error.sass_backtrace_str(label)
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error.gsub!("\n", '\A ')
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error.gsub!("'", '\27 ')
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"footer { white-space: pre; }
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footer:after { content: '#{error}' }"
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end
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def initialize(scss, target)
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@scss = scss
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@target = target
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unless Sass::Script::Functions < Sprockets::SassFunctions
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Sass::Script::Functions.send :include, Sprockets::SassFunctions
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end
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end
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# Compiles the given scss and output the css as a string.
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#
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# Options:
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# safe: (boolean) if true, theme and plugin stylesheets will not be included. Default is false.
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def compile(opts={})
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env = Rails.application.assets
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# In production Rails.application.assets is a Sprockets::Index
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# instead of Sprockets::Environment, there is no cleaner way
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# to get the environment from the index.
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if env.is_a?(Sprockets::Index)
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env = env.instance_variable_get('@environment')
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end
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pathname = Pathname.new("app/assets/stylesheets/#{@target}.scss")
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context = env.context_class.new(env, "#{@target}.scss", pathname)
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debug_opts = Rails.env.production? ? {} : {
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line_numbers: true,
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# debug_info: true, # great with Firebug + FireSass, but not helpful elsewhere
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style: :expanded
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}
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css = ::Sass::Engine.new(@scss, {
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syntax: :scss,
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cache: false,
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read_cache: false,
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style: :compressed,
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filesystem_importer: opts[:safe] ? DiscourseSafeSassImporter : DiscourseSassImporter,
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sprockets: {
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context: context,
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environment: context.environment
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}
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}.merge(debug_opts)).render
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css_output = css
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if opts[:rtl]
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begin
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require 'r2'
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css_output = R2.r2(css) if defined?(R2)
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rescue; end
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end
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css_output
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end
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end
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