Here's how it works:
- When Vervis starts, it writes a config file and it writes post-receive hooks
into all the repos it manages
- When a git push is accepted, git runs the post-receive hook, which is a
trivial shell script that executes the actual Haskell program implementing
the hook logic
- The Haskell hook program generates a Push JSON object and HTTP POSTs it to
Vervis running on localhost
- Vervis currently responds with an error, the next step is to implement the
actual publishing of ForgeFed Push activities
This patch doesn't just add the handler code, it also does lots of refactoring
and moves around pieces of code that are used in multiple places. There is
still lots of refactoring to make though. In this patch I tried to make minimal
changes to the existing Note handler to avoid breaking it. In later patches
I'll do some more serious refactoring, hopefully resulting with less mess in
the code.
