I would like to filter some posts of my website based on a metadata value. I would like to create a specific metadata called status (like title or date) which could take several values (draft, published, archive) :
---
title: The title
author: Myself
date: 2016-11-29
tags: tag1, tag2
status: draft
---
According to the value of the status metadata, the post should be published or not.
I have a look in the hackage documentation but I'm not sure of the functions to use.
Do you know how to make that with Hakyll ?
You are probably looking for matchMetadata:
matchMetadata :: Pattern -> (Metadata -> Bool) -> Rules () -> Rules ()
With it, instead of, say...
match "posts/*.md" $ do -- etc.
... you might have:
matchMetadata "posts/*.md" (\m -> lookupString "status" m == Just "published") $ do -- etc.