On Sun, Oct 17, 2010 at 10:24, Hans Hagen
On 17-10-2010 4:06, Tad Ashlock wrote:
I'm trying to update a ConTeXt module of mine. It does some data
gathering during the ConTeXt run, and then processes it after the run is complete. This used to work last year:
local id, err = callback.register('stop_run', new_stop_run_function)
But now err is set to "callback 'stop_run' is frozen (actions performed at the end of a run)".
indeed
After trying various approaches for a couple of hours, I'm calling for
help. :)
Here's what I ended up with:
\startluacode print('%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% TEST1') local function after_run (head, groupcode) print('%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% TEST2') return head, true end nodes.tasks.appendaction('finalizers','after','after_run') \stopluacode \starttext \input knuth \stoptext
In the output, I see the TEST1 line, but not the TEST2 line.
because after_run is not seen,
function myprivatenamespace.after_run ...
nodes.tasks.appendaction('finalizers','after','myprivatenamespace.after_run')
I don't know what "head" and "groupcode" are, but those seem to be the
expected parameters for an action. I don't know why it returns "head, true", but that was recommended in a posting ( http://archive.contextgarden.net/message/20100410.005025.76ac9efd.en.html ).
whatever, it's not the place to hook in your finalizer as there finalizers are just a specific place in node list processing
I have no idea if 'finalizers' is the right parameter, but I didn't see
any others that looked like it could be synonymous with 'stop_run'.
You can use (preferable no messages there):
luatex.registerstopactions(yourfunction)
or for messages:
statistics.register("banner",function() return "text" end)
in this case returning false (or nil) will not show the statistic which makes sense if there's nothing useful to report.
At some point there will be a formal description for this.
Hans
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Hans, The registerstopactions() function was the solution I was looking for, but I've verified that both of the solutions work as expected. I tested them with both a single ConTeXt source file and a set of files in a Project -> Product -> Component structure. I'll wiki this soon. Thanks, Tad