Support for a single HTML report file

[dmorgan-fa]

Previously this was supported by setting SIMPLECOV_INLINE_ASSETS:

• [feature] Add inline assets option simplecov-html#107

however support has been dropped as part of the initial v1 release.

Having a single self-contained report means that the report (index.html) can be uploaded to GitHub as a single file run artifact, and viewed on the run without having to download the artifacts:
GitHub Blog: GitHub Actions now supports uploading and downloading non-zipped artifacts

Is there any appetite to reintroduce this feature?

[sferik]

Thanks for opening this issue. This feature was inadvertently dropped in the 1.0 rewrite of the HTML formatter, which replaced the server-side ERB templates with a client-side renderer and did not carry over the SIMPLECOV_INLINE_ASSETS mode from simplecov-html.

I’ve opened PR #1245, which restores single-file reports. I’ve made them the default, since the current report is only a handful of files anyway, so there’s no need to specify any configuration or environment variable to enable this feature. The viewer's JavaScript, CSS, and favicons are inlined into the template when the gem is built and the coverage data is embedded when the report is generated, so the formatter writes one self-contained index.html (a coverage.json is still written alongside for tooling that reads raw data).

Please take a look at that PR and let me know if it will satisfy your use case.