Script to remove dependecy injection declaration of AngularJs files

angular-remove-di.js

#!/usr/bin/nodejs

var fs = require('fs');

process.stdin.resume();
process.stdin.setEncoding('utf8');
process.stdin.on('data', function(data) {
  var fileList = data.split('\n'),
      file;

  console.log('Starting...');
  for (var index in fileList) {
    file = fileList[index];
    if (!fs.existsSync(file)) {
      return;
    }
    console.log('Removing dependeny injection declaration of ', file);
    removeDependcyInjectionDeclaration(file);
  }

  console.log('Done!')
  process.exit(0);
});

function removeDependcyInjectionDeclaration(file) {
  /**
   * Search occurrences in following pattern:
   * 
   * DeclarationName.$inject = ['dependency1', 'dependency2', 'dependency3'];
   * 
   * Too works with multiple lines:
   * 
   * DeclarationName.$inject = [
   *   'dependency1',
   *   'dependency2',
   *   'dependency3'
   * ];
   */
  var regex = /(\n)(.*)\.\$inject(.*)\[(\s*?.*?)*?\];(\n)/g;
  fs.readFile(file, 'utf-8', function(error, data) {
    if (error) return console.log(error);

    var result = data.replace(regex, '');

    fs.writeFile(file, result, 'utf8', function(error) {
      if (error) return console.log(error);
    });
  });
}

Thank for your suggestion Luis. I have added a comment explaining the pattern that the regex matches.