Class: Jekyll::MinifyJs::TerserGenerator

Inherits:
Generator
  • Object
show all
Defined in:
lib/jekyll-minify-js.rb

Overview

class Jekyll::MinifyJs:TerserGenerator

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.run(site) ⇒ Object

rubocop:disable Metrics/AbcSize,Metrics/CyclomaticComplexity,Metrics/MethodLength,Metrics/PerceivedComplexity



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# File 'lib/jekyll-minify-js.rb', line 23

def self.run(site) # rubocop:disable Metrics/AbcSize,Metrics/CyclomaticComplexity,Metrics/MethodLength,Metrics/PerceivedComplexity
  config = site.config['minify_js'] || {}
  # disable to skip minification
  return if config['enable'] && config['enable'] == false

  started_at = Process.clock_gettime(Process::CLOCK_MONOTONIC)
  # Build options from config
  compress_opt = config['compress'] || true
  mangle_opt = config['mangle'] || true
  source_map_enabled = config['source_map'] || true

  Jekyll.logger.info ''
  Jekyll.logger.info set_color(96, "Running Jekyll MinifyJs v#{Jekyll::MinifyJs::VERSION}", 1)

  entry_dir = config['entry_dir'] || 'js'
  out_dir = config['output_dir'] || 'js'

  if config['entry_dir']
    Jekyll.logger.info "Entry  : #{File.join(site.source, config['entry_dir'])}"
  else
    Jekyll.logger.info "Entry  : No entry_dir found, look in #{File.join(site.source, 'js')}"
  end

  if config['output_dir']
    Jekyll.logger.info "Output : #{File.join(site.dest, config['output_dir'])}"
  else
    Jekyll.logger.info "Output : No output_dir found, write to #{File.join(site.dest, 'js')}"
  end

  entry_dir_full = File.join(site.source, entry_dir)
  out_dir_full = File.join(site.dest, out_dir)
  js_files = Dir.glob(File.join(entry_dir_full, '**', '*.js'))

  Jekyll.logger.warn 'MinifyJs:', "Entry directory not found: #{entry_dir_full}" unless Dir.exist?(entry_dir_full)
  if Dir.exist?(entry_dir_full) && js_files.empty?
    Jekyll.logger.info 'MinifyJs:',
                       "No JavaScript files found in #{entry_dir_full}"
  end

  FileUtils.mkdir_p(out_dir_full)

  js_files.each do |src|
    rel = src.sub(/\A#{Regexp.escape(entry_dir_full + File::SEPARATOR)}/, '')
    out = File.join(out_dir_full, rel)
    map_name = "#{File.basename(out)}.map"

    begin
      src_content = File.open(src, 'r:BOM|UTF-8', &:read)
      options = {}
      options[:compress] = compress_opt
      options[:mangle] = mangle_opt
      if source_map_enabled
        options[:source_map] =
          { filename: File.basename(src), output_filename: File.basename(out), sources_content: true,
            url: map_name }
        compiled, map = Terser.compile_with_map(src_content, options)
      else
        compiled = Terser.compile(src_content, options)
        map = nil
      end
      compiled += "\n//# sourceMappingURL=#{map_name}\n" unless compiled.include?('sourceMappingURL')
      File.write(out, compiled)
      File.write("#{out}.map", map) if map
    rescue StandardError => e
      Jekyll.logger.warn 'Terser:', "ruby terser failed for #{rel}: #{e.message}; copying original"
      FileUtils.cp(src, out)
    end
  end

  elapsed = Process.clock_gettime(Process::CLOCK_MONOTONIC) - started_at
  Jekyll.logger.info set_color(92, format('Done in %.2fs', elapsed), 1)
end

Instance Method Details

#generate(_site) ⇒ Object 



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# File 'lib/jekyll-minify-js.rb', line 19

def generate(_site)
  # Work is done in the :post_write hook to avoid Jekyll overwriting outputs.
end