Demonstrate a potential bug in file array format dest referencing.

README.md

I have been trying to find a way to get a list of the dest files from a copy task so I can use them in a later task through a template. It does not seem to work.

Reproduction:

• npm install
• ./node_modules/.bin/grunt
• See the output of the dest files for copy and concat and how copy has none

a.js

/**
* Contents of a.
*/
a = 10;

b.js

/**
* Contents of b.
*/
b = 10;

Gruntfile.js

module.exports = function(grunt) {
   // -- LOAD GRUNT PLUGINS -- //
   grunt.loadNpmTasks('grunt-contrib-clean');
   grunt.loadNpmTasks('grunt-contrib-copy');
   grunt.loadNpmTasks('grunt-contrib-concat');
   
   grunt.registerMultiTask('debug_files', 'debugs files passed in', 
      function() {
         grunt.log.writeln('Inside task: ' + this.nameArgs);
         try {
            var files = this.filesSrc;
            grunt.log.writeln('files: ' + files);
         }
         catch(ex) {
            grunt.log.writeln('no files exception');
         }
      }
   );
   
   debugger;

   var src_files = ['a.js', 'b.js'],
       build_dir = 'build';

   // --- CREATE CONFIGURATION --- //
   var config = {
      pkg: grunt.file.readJSON('package.json'),

      // Clean up the build area      
      clean: {
         options: {
            force: true
         },
         full  : [build_dir]
      },
      
      copy: {
         dev: {
            files: [
               { dest: 'build/', src: src_files }
            ]
         },
         prod: {
            src: src_files,
            dest: 'build/prod/'
         }
      },
      
      concat: {
         prod: {
            files: [
               { dest: 'build/prod.js', src: src_files }
            ]
         },
         dev: {
            src: src_files,
            dest: 'build/dev.js'
         }
      },
      
      // Write out the dest values from the items above.
      // I would expect that all of these would print out valid files,
      // but the ones that use the files array format don't seem to work.
      debug_files: {
         concat_prod_files: {
            src: ['<%= concat.prod.dest %>']
         },
         concat_dev_files: {
            src: ['<%= concat.dev.dest %>']
         },
         copy_dev_files: {
            src: ['<%= copy.dev.dest %>']
         },
         copy_prod_files: {
            src: ['<%= copy.prod.dest %>']
         }
      }            
   };

   // Register config and aliases
   grunt.initConfig(config);
   grunt.registerTask('default',  ['clean', 'copy', 'concat', 'debug_files']);               
};

package.json

{
  "name": "copy_bug",
  "version": "1.0.0",
  "devDependencies": {
    "grunt": "~0.4.0",
    "grunt-cli": "~0.1.0",
    "grunt-contrib-clean": "~0.4.0",
    "grunt-contrib-copy": "~0.4.0",
    "grunt-contrib-concat": "~0.1.3",
    "node-inspector": ">= 0.2.0beta3"
  }
}