fileSlug should include respect folders with leading ISO dates

[Brixy]

Eleventy’s flexibility is great.

So far fileSlug only works for—well, it’s a telling name—file names, but should be extended to be used with folders.

This is a common and very logical way to structure posts and associated media:

.
└─ src/
   └─ posts/
      └─ 2021-04-20-a-post-without-media.md # not a folder
      └─ 2021-04-20-another-post/
      │  ├─ index.md
      │  ├─ image.jpg
      │  └─ audio.mp3
      └─ 2021-04-21-a-third-post/
         ├─ index.md
         └─ image.png

A simple permalink redirect is not possible in posts.json because of the mixture of .md files and folders with leading ISO dates. (Yet, Eleventy seems to recognize dates from folder names.)

It is easy to accomplish something like that using a filters for permalink.

But you run into problems due to #1140.

Thank you!

[Brixy]

I just happened to find out that eleventy does get the date from a folder name. Perfect!

The file /posts/2021-07-01-my-post/index.md has the following date (without adding date in front matter):

(Thu Jul 01 2021 00:00:00 GMT+0200 (Mitteleuropäische Sommerzeit)

Should we clarify this?:

• Is it the expected behaviour that Eleventy gets the date from a folder name?
• Will this work in the future?

To get rid of the date from the path I just added a little filter:

eleventyConfig.addFilter('removeDateFromPath', (value) => {
  return value.replace(/\d{4}-\d{2}-\d{2}-/, "");
});

[zachleat]

Yeah! This is expected. We use the full input path to search for the date format. I updated the docs to clarify this a bit, thanks for the ping!