This plugin enables a kind of permalink which can be used to refer to a piece of content which is resistant to the file being moved or renamed.
It does this by creating additional output html in PERMALINK_PATH
(default permalinks/) which include redirect code to point user at original
page.
To work each page has to have an additional piece of metadata with the key
permalink_id (configurable with PERMALINK_ID_METADATA_KEY
which should remain static even through renames and should also
be unique on the site.
This can be generated automatically with the filetime_from_git module and
the GIT_FILETIME_GENERATE_PERMALINK option.
This should always be used with GIT_FILETIME_FOLLOW to ensure this
persists across renames.
To make this work with things like github.io I'm forced to use HTML and Javascript redirects rather than HTTP redirects which is obviously suboptimal.