add support for grunt-contrib-compress

compress.js

'use strict';

var path = require('path');

exports.name = 'compress';

//
// Output a config for the furnished block
// The context variable is used both to take the files to be treated
// (inFiles) and to output the one(s) created (outFiles).
// It also conveys whether or not the current process is the last of the pipe
//
exports.createConfig = function (context, block) {
  var cfg = {
    files: []
  };
  context.outFiles = [];

  // Depending whether or not we're the last of the step we're not going to output the same thing:
  // if we're the last one we must use the block dest file name for output
  // otherwise uglify each input file into its given outputfile
  if (context.last === true) {
    var files = {};
    var ofile = path.join(context.outDir, block.dest);
    // changing the file extension wrecks our build flow.
    // setting this will not override the destination file ready from usemin blocks
    files.ext = '.gz.' + block.type;
    files.dest = ofile;
    files.src = context.inFiles.map(function (fname) {
      return path.join(context.inDir, fname);
    });
    // cfg[ofile] = context.inFiles.map(function (fname) { return path.join(context.inDir, fname);});
    cfg.files.push(files);
    context.outFiles.push(block.dest);
  } else {
    context.inFiles.forEach(function (fname) {
      var file = path.join(context.inDir, fname);
      var outfile = path.join(context.outDir, fname);
      cfg.files.push({
        src: [file],
        dest: outfile
      });
      // cfg[outfile] = [file];
      context.outFiles.push(fname);
    });
  }
  return cfg;
};