How can I use gulp to replace a string in a file?

Question

I am using gulp to uglify and make ready my javascript files for production. What I have is this code:

var concat = require(\'gulp-concat\');
var del = requi         


        

Answer 1

I think that the most correct solution is to use the gulp-preprocess module. It will perform the actions you need, depending on the variable PRODUCTION, defined or not defined during the build.

Source code:

/* @ifndef PRODUCTION */
dataServer: "http://localhost:3048",
/* @endif */
/* @ifdef PRODUCTION **
dataServer: "http://example.com",
/* @endif */

Gulpfile:

let preprocess = require('gulp-preprocess');
const preprocOpts = {
  PRODUCTION: true
};

gulp.task('scripts', ['clean-js'], function () {
  return gulp.src(js.src)
    .pipe(preprocess({ context: preprocOpts }))
    .pipe(uglify())
    .pipe(concat('js.min.js'))
    .pipe(gulp.dest('content/bundles/'));
}

This is the best solution because it allows you to control the changes that are made during the build phase.