gulpfile with tasks to lint itself and restart gulp process on change

gulpfile

var gulp = require('gulp');
var jshint = require('gulp-jshint');
var jshintStylish = require('jshint-stylish');

/* required for restarting gulp task */
var spawn = require('child_process').spawn;
/* used to track if a gulp process is already running */
var p;

/* task to restart gulp process */
gulp.task('restart-me', function() {
    /* if p is defined, a gulp process is already
    running, kill current process befor starting
    a new one */
    if (p) { p.kill(); }
    /* start new gulp process */
    p = spawn('gulp', ['dev'], {stdio: 'inherit'});
});

/* task to lint this file */
gulp.task('lint-me', function() {
    gulp.src('./gulpfile.js')
        .pipe(jshint())
        .pipe(jshint.reporter(jshintStylish));
});

/* watch this file, on change, lint then restart gulp */
gulp.task('watch-me', function() {
    gulp.watch('./gulpfile.js', ['lint-me', 'restart-me']);
});

/* dev tasks */
gulp.task('dev', ['watch-me']);