Backlinks are created by the backlink_extract() function which (among other arguments) takes a mimetype. When a ticketchange artifact is processed this mimetype is derived SOLELY from this artifact. Fossil does not take into account neither GENERATED nor DEFAULT values configured by the ticketing table schema (note PRAGMA table_info() instead of PRAGMA table_xinfo()).

This becomes a problem if ticketing is setup to use Markdown exclusively (for example, to reduce users' confusion) and omit (then redundant) "J mimetype text/x-markdown" lines from the artifacts (which reduces the clutter in the /tkthistory).

In that case ticket_insert() implies Wiki formating for the backlink_extract() calls.

Two things here seem especially annoying to me:

1. This behaviour is rather unexpected and undocumented.

2. If the absence of backlinks is noticed after some time of active ticketing then it is hard to "repair" the repository.

I suggest that Fossil should either

• respect the mimetypes from the ticketing schema

• or allow default mimetype value(s) be configured as a setting

The former seems more appealing, but also harder to implement.

What do think? Is this issue worth fixing, and if so then how?