Plugin is not compatible with gulp-sourcemaps

[RadValentin]

I'm trying to prefix my selectors with this plugin and have sourcemaps generated by gulp-sourcemaps but the problem is that your plugin is changing the way my css is written by removing whitespaces. Someting like this (with splitOnCommas: true):

h1,
h2,
h3 {
 ...
}

is rendered out as

.prefix h1, .prefix h2, .prefix h3 {
   ...
}

This in turn messes things up because the sourcemap plugin doesn't account for this change. So can you please add support for gulp-sourcemaps? Info on how to do this can be found here.

[RadValentin]

I've been thinking about this and maybe you could add sourcemap support another way. Postcss supports sourcemaps maybe you could add in an extra parameter that would enable sourcemap preservation/generation. Then you'd call the plugin like this:

var transformSelectors = require("gulp-transform-selectors");

gulp.src("./src/*.css")
    .pipe(transformSelectors(function (selector) {
        return '.ie8 ' + selector;
    }, {
        splitOnCommas: true,
        postcss: {
          map: true,
          from: 'style.css',
          to: 'style.css'
        }
    }))
    .pipe(gulp.dest("./dist"));

What do you think?