Adds a list of files in resulting concatenated file

gulpfile.js

var gulp = require('gulp');
var concat = require('gulp-concat-util');
var through = require('through');
var gutil = require('gulp-util');
var refObj = {wallOfText: ''};
function write(file) {
  refObj.wallOfText += "/* " + file.path + " */" + gutil.linefeed;
  this.emit('data', file);
}

function end() {
  this.emit('end');
}

gulp.task('scripts', function() {
  gulp.src('./src/*.js')
    .pipe(through(write, end))
    .pipe(concat('all.js'))
    .pipe(concat.header('/* Files concatenated for this file:*/\n<%= refObj.wallOfText %>\n', {refObj: refObj}))
    .pipe(gulp.dest('./dist/'))
});

gulp.task('default', ['scripts']);

Instead of full path, you can have it to be relative, just use path.relative