Sourcemaps combined with Autoprefixer fails about mincer

[puzrin]

There was a long story of autoprefixer mutations - package name & signature change. Probably, feature loss happened at some point. It worth to check that atoprefixer map output is in string format, not an object https://github.com/nodeca/mincer/blob/master/lib/mincer/processors/autoprefixer.js#L88.

[jeroenvisser101]

@puzrin thanks! I'll check that out now, and if that's it, create a PR

[puzrin]

https://github.com/nodeca/mincer/blob/master/lib/mincer/compressors/csswring_compressor.js#L72

Probably csswring can have the same problem, because it uses exactly the same engine.

[jeroenvisser101]

So typeof this.map == 'string' should evaluate to true, correct?

[jeroenvisser101]

It seems to be csswring indeed, console.log'ing it's this.map gives an instance of SourceMapGenerator:

SourceMapGenerator {
  _file: 'application.css',
  _sourceRoot: null,
  _skipValidation: false,
  _sources:
   ArraySet {
     _array:
      [ 'application.css',
        ...
        'styleguide/typography.scss' ],
     _set:
      { '$application.css': 0,
        ...
        '$styleguide/typography.scss': 218 } },
  _names: ArraySet { _array: [], _set: {} },
  _mappings:
   MappingList {
     _array:
      [ [Object],
       ...
        [Object],

[puzrin]

https://github.com/mozilla/source-map#sourcemapgeneratorprototypetostring i guess .toString() should help.

[jeroenvisser101]

@puzrin got it! It was autoprefixer after all, committing now and submitting for review!