Gulp: How do I read file content into a variable?

Thargor pointed me out in the right direction:

gulp.task('doSomething', function() {
  var fileContent = fs.readFileSync("path/to/file.something", "utf8");

  return gulp.src(dirs.src + '/templates/*.html')
    .pipe(myFunction(fileContent))
    .pipe(gulp.dest('destination/path'));
});