gulp-modify-file

> Gulp plugin allow modify file in .pipe

``javascript
const gulp = require('gulp')

gulp.task('js', () => {
const modifyFile = require('gulp-modify-file')

return gulp
.src('app/*/.js')
.pipe(modifyFile((content, path, file) => {
const start = '(function (){\n'
const end = '\n})()'

return ${start}${content}${end}
}))
.pipe(gulp.dest('build'))
})
``