Class: Condenser::TerserMinifier

Inherits:
NodeProcessor show all
Defined in:
lib/condenser/minifiers/terser_minifier.rb

Instance Attribute Summary

Attributes inherited from NodeProcessor

#npm_path

Instance Method Summary collapse

Methods inherited from NodeProcessor

#binary, call, #exec_runtime, #exec_runtime_error, #exec_syntax_error, #name, #npm_install, #npm_module_path, setup

Constructor Details

#initialize(dir, options = {}) ⇒ TerserMinifier

Returns a new instance of TerserMinifier.



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# File 'lib/condenser/minifiers/terser_minifier.rb', line 3

def initialize(dir, options = {})
  super(dir)
  npm_install('terser')
  
  @options = options.merge({
    keep_classnames: true,
    keep_fnames: true
  }).freeze
end

Instance Method Details

#call(environment, input) ⇒ Object 



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# File 'lib/condenser/minifiers/terser_minifier.rb', line 13

def call(environment, input)
  opts = {
    # 'moduleRoot' => nil,
    # 'filename' => input[:filename],
    # 'moduleId' => input[:filename].sub(/(\..+)+/, ''),
    # 'filenameRelative' => input[:filename],#split_subpath(input[:load_path], input[:filename]),
    # 'sourceFileName' => input[:filename],
    # 'sourceMapTarget' => input[:filename]
    # # 'inputSourceMap'
  }.merge(@options)
  
  result = exec_runtime(<<-JS)
    const Terser = require("#{npm_module_path('terser')}");
    const source = #{JSON.generate(input[:filename] => input[:source])}
    const options = #{JSON.generate(opts)};


    Terser.minify(source, options).then((result) => {
      console.log(JSON.stringify(result));
    }, (error) => {
      console.log(JSON.stringify({'error': error.name + ": " + error.message}));
      process.exit(1);
    });
  JS

  exec_runtime_error(result['error']) if result['error']
  
  result['warnings']&.each { |w| environment.logger.warn(w) }
  
  input[:source] = result['code']
  input[:map] = result['map']
end