用途
lazypipe：
var lazypipe = require('lazypipe');function something(dest) { return (lazypipe() .pipe(buffer) .pipe(rev) .pipe(gulp.dest, dest) .pipe(rev.manifest, { path: 'manifest.json', merge: true }) .pipe(gulp.dest, dest))();}gulp.src.some_stuff .pipe(anotherStuff) .pipe(something(options.dest)) .pipe(extrastuff)
