This function allows you to concatenate file paths together so that you can use them in a `gulp.src`. Using this method instead of `gulp-include` allows you to generate sourcemaps to make it easier to debug issues.

include.js

// @name Include
// @author Tyler Benton
// 
// @description
// This function allows you to concatenate file paths together so that you can use them in a `gulp.src`
// Using this method instead of `gulp-include` allows you to generate sourcemaps to make it easier to debug issues.
// 
// @arg {string} path - The path for the file you want to look in
// 
// @returns {array} - The array of file paths 
// 
// @markup {js} Example js file
// //= include [
// //   "helpers/*.js",
// //   "components/*.js"
// //  ];
// 
// @markup {js} Example gulp task
// gulp.task("js:build", function(){
// return gulp.src(include("app/lib/js/main.js"))
//         .pipe($.concatSourcemap("main.js", {
//          sourcesContent: true
//         }))
//         .pipe(gulp.dest(dest + paths.js));
// });
function include(path){
  var relativePath = path.slice(0, path.lastIndexOf("/") + 1),
      file = fs.readFileSync(path, "utf8", function(err, data){
       return err ? console.log(err.message) : data;
      }),
      includes = [path],
      lines = file.split("\n"),
      commentBlock = [],
      isBlock = false,
      cleanLineRegex = /(?:\/\/)|[\[\],;"'\s]/g;

  for(var i = 0, l = lines.length; i < l; i++){
   var line = lines[i],
       startIndex = line.indexOf("//= include ");
   // console.log(i);
   // console.log(line);
   if(startIndex >= 0){
    line = "// " + line.slice(startIndex + 12); // removes `//=include `

    if(!isBlock && line.indexOf(" [") >= 0){ // is array
     // console.log("is array");
     if(line.indexOf("]") >= 0){ // is array on a single line
      // console.log("on a single line");
      includes = includes.concat(line.replace(/(?:\/\/)|[\[\];"'\s]/g, "").split(","));
     }else{ // is multiline array
      // console.log("on multiple lines");
      isBlock = true;
     }
    }else{ // is single file
     // console.log("is single file");
     includes.push(line.replace(cleanLineRegex, ""));
    }
   }

   if(isBlock && line.indexOf("// ") >= 0){ // is still in the comment block
    // console.log("isBlock and has comment");
    line = line.replace(cleanLineRegex, "");
    line !== "" && commentBlock.push(line);
   }else{ // is no longer in a comment block
    isBlock = false;
    if(commentBlock.length > 0){ // checks to see if any files where added and if they where then concats them with the includes array
     includes = includes.concat(commentBlock);
     commentBlock = []; // resets the commentBlock array
    }
   }
   
   if(i === l - 1 && commentBlock.length > 0){ // ensures that the commentBlock gets added if it's the last line in the file
    includes = includes.concat(commentBlock);
   }
   // console.log("");
  }

  // this adds the relative path to each file path
  for(var i = 1, l = includes.length; i < l; i++){
   includes[i] = relativePath + includes[i];
  }

  // ensures there isn't any duplicate files being added
  return includes.filter(function(v, i, a){
   return a.indexOf(v) == i;
  });
 }