Cache Invalidation With hard-source-webpack-plugin

[dtothefp]

Problem

If using the hard-source-weback-plugin https://github.com/mzgoddard/hard-source-webpack-plugin upon 2nd build no CSS file is emitted for files processed with mini-css-extract-plugin. I have an issue on hard-source but it is not being addressed mzgoddard/hard-source-webpack-plugin#301 and I'm wondering if there is something internally that could be done to mini-css that could fix this issue? I saw past discussions for extract-text-webpack-plugin where caching issues were addressed internally to it that helped it's compatibility with hard-source.

Test Case

Created minimum use case example here https://github.com/dtothefp/hard-cache-mini-css-webpack-4

[dtothefp]

Fixed mzgoddard/hard-source-webpack-plugin#301 (comment)

[dtothefp]

actually fixed here mzgoddard/hard-source-webpack-plugin#346