Class: FontawesomeSubsetter::FontawesomeSassImporter

Inherits:
Object
  • Object
show all
Defined in:
lib/fontawesome_subsetter/subsetter.rb

Overview

Custom Sass importer that intercepts FontAwesome SCSS file loads. Strips the populated $icons and $brand-icons maps from variables.scss in memory, replacing them with empty !default maps so the subsetter can inject only used icons. This avoids requiring users to manually edit their vendor FontAwesome files.

Instance Method Summary collapse

Constructor Details

#initialize(scss_dir) ⇒ FontawesomeSassImporter

Returns a new instance of FontawesomeSassImporter.



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# File 'lib/fontawesome_subsetter/subsetter.rb', line 16

def initialize(scss_dir)
  @scss_dir = File.expand_path(scss_dir.to_s)
end

Instance Method Details

#canonicalize(url, context) ⇒ Object 



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# File 'lib/fontawesome_subsetter/subsetter.rb', line 20

def canonicalize(url, context)
  if url.start_with?("file://")
    path = URI.parse(url).path
  elsif context.containing_url
    base = File.dirname(URI.parse(context.containing_url.to_s).path)
    path = File.expand_path(url, base)
  else
    return nil
  end

  candidates = [path, "#{path}.scss", File.join(File.dirname(path), "_#{File.basename(path)}.scss")]
  match = candidates.find { |c| File.exist?(c) && c.start_with?(@scss_dir) }
  return nil unless match

  "file://#{match}"
end

#load(url) ⇒ Object 



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# File 'lib/fontawesome_subsetter/subsetter.rb', line 37

def load(url)
  path = URI.parse(url).path
  content = File.read(path)

  if File.basename(path, ".scss").delete_prefix("_") == "variables"
    content = content.sub(/^\$icons\s*:\s*\(.*?^\)\s*;/m, "$icons: () !default;")
    content = content.sub(/^\$brand-icons\s*:\s*\(.*?^\)\s*;/m, "$brand-icons: () !default;")
  end

  { contents: content, syntax: :scss }
end