At Sat, 17 Nov 2012 16:31:23 -0800, Jordan Johnson wrote: > -- 1 -- > > Starting a checker file with "#lang handin-server/checker" (as the > handin-server/checker docs suggest) does not work; the log file indicates the > server is failing to load the checker, with this error: > > standard-module-name-resolver: collection not found > collection: "handin-server/checker/lang" > > Using "#lang s-exp handin-server/checker" seems to work, but I can't tell if > there are other related problems that this fix is merely hiding.
I'm inclined to call that a documentation bug, but I will also make `#lang handin-server/checker' work. > -- 2 -- > > I can create and run checker files that define a trivial checker function > explicitly (i.e., without using the "check:" form from > handin-server/checker), > but it appears that if I do anything that creates an evaluator -- be it using > make-evaluator/submission (or the other make-evaluator* functions, whether > I'm > require'ing them from handin-server/sandbox or directly from racket/sandbox) > or > using "check:" -- when the client attempts to hand in, I get an error from > namespace-attach-module, quoted below in my original message. For example, > this > triggers the error: > > #lang racket > > (require racket/sandbox) > (provide checker) > > (define (checker users submission) > (define e (make-evaluator '(special beginner))) > "save-it-here.rkt") I finally tracked this down to an assumption that `racket/base' was reachable from `mred/private/mred' (which ceased to be true at some point in the never-ending `scheme' to `racket' conversion) along with a mismatch between `gui-require-dynamic' and its documentation. I've pushed a repair to both of those problems. I think we could work around the problem in v5.3.1, but it sounds like you're using the latest via git to get the handin server, anyway. > By the way, is it possible to write automated tests for a checker script that > uses #lang handin-server/checker -- as opposed to testing it interactively > using the client? I'm pretty sure that I've `require'd the `checker' function from a `handin-server/checker' module to call it directly, but I don't remember the details. ____________________ Racket Users list: http://lists.racket-lang.org/users
