Add Jekyll migration tool

[PaulAdamDavis]

No description provided.

[markstos]

@PaulAdamDavis Thanks for this. Could you clarify in the docs where the "supplied zip" comes from or the expected format? The jekyll command doesn't have a built-in zip export subcommand.

[markstos]

From reading the source code, there's a comment that the tool is only known to work on exports from Medium:

https://github.com/TryGhost/migrate/blob/main/packages/mg-jekyll-export/lib/read-zip.js#L11

[markstos]

It would helpful if the fields recognized from the front matter are documented.

From looking at the source here, it's clear that date, author and title are recognized.

It's not clear that tags from the frontmatter are carried over. Also, I don't see other frontmatter attributes being processed like permalink, basename and category.

[PaulAdamDavis]

Hi @markstos! I've just pushed the ability to handle tag, tags, category, and categories front matter.

I've also added a brief explanation of the expected folder structure.

This tool was intended to handle a very vanilla Jekyll site, and at the time didn't need to consume permalink or basename values.

If you can see value in adding support for these, please do open a new issue :)
Pull requests are always welcome, and real-world test data we can build & test against is also very welcome!

[markstos]

@PaulAdamDavis Thanks for the quick reply and update. I've opened an issue to support permalink and basename and submitted a PR that will make the category the primary tag, which seems like a better choice than the first post tag.

#505