[Monotone-devel] A small Lua hack to know what branches were affected...

[Richard Levitte - VMS Whacker]

Hi,

there have been numerous times when I've pulled and wanted to know
what branches were affected, if it's worth it to try an updated or
not.  The new note_netsync_* Lua hooks provide exactly the kind of
framework to make it easy, so I did.

A somewhat typical (as typical as Swedish is for you :-)) output is
for example (I go this just a few moments ago):

: ; mtn pull 
mtn-0.26: ansluter till off.net
mtn-0.26: letar efter saker att synkronisera:
mtn-0.26: certifikat | nycklar | revisioner
mtn-0.26:     17 702 |      27 |      5 858
mtn-0.26:    byte in |    byte ut | cert in | rev in
mtn-0.26:    43,1 Ki |    31,6 Ki |   16/16 |    4/4
mtn-0.26: lyckat utbyte med off.net
Affected branches:
  net.venge.monotone.cvsimport-branch-reconstruction
  net.venge.monotone.guitone.qt4

Code attached, enjoy!

Cheers,
Richard

-----
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-- 
Richard Levitte                         address@hidden
                                        http://richard.levitte.org/

"When I became a man I put away childish things, including
 the fear of childishness and the desire to be very grown up."
                                                -- C.S. Lewis

-- Lua snippet to display what branches were affected by revisions and certs
-- that came into the database.  I integrate it into my ~/.monotone/monotonerc
-- /Richard Levitte
--
-- Released as public domain

netsync_branches = {}
function note_netsync_start(nonce)
   netsync_branches[nonce] = {}
end

function note_netsync_revision_received(new_id,revision,certs,nonce)
   for _, item in pairs(certs)
   do
      note_netsync_cert_received(new_id,item.key,item.name,item.value,nonce)
   end
end

function note_netsync_cert_received(rev_id,key,name,value,nonce)
   if name == "branch" then
      netsync_branches[nonce][value] = 1
   end
end

function note_netsync_end(nonce)
   local first = true
   for item, _ in pairs(netsync_branches[nonce])
   do
      if first then
         io.stderr:write("Affected branches:\n")   
         first = false
      end
      io.stderr:write("  "..item.."\n")   
   end
   netsync_branches[nonce] = nil
end