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 25

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.fetch("compress", true)
  mangle_opt = config.fetch("mangle", true)
  source_map_enabled = config.fetch("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
      if source_map_enabled && !compiled.include?("sourceMappingURL")
        compiled += "\n//# sourceMappingURL=#{map_name}\n"
      end
      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 21

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