Hey, is there a scheduling/cron library for recurring tasks in Racket? I can’t find anything except for “deferred” which supports one-off tasks only

okay nevermind, cron-like behaviour can be achieved by pre-scheduling deferred calls a bit… :slightly_smiling_face:

@pocmatos I think your issue with linklets is based on a confusion between the --linklets flag (create a bunch of linklets for a single file) and the -x flag (extract a file and all its dependencies into a single linklet)

@samth ah! That’s probably it. I saw --expand as well but the --linklets flag was the one which sounded more like what I wanted. Thanks, I will give that a go!

The --linklets flag is (I think) mostly for understand what the expander does; the -x flag is useful for actually running the resulting program in specialized cases (as seen with bootstrapping the expander itself)

@samth with -x, full command line: racket bootstrap-run.rkt -x -s -t /home/pmatos/Projects/redjacket/examples/factorial-input.rkt it seems to be actually running my file:

...
compile: /home/pmatos/Projects/redjacket/examples/factorial.rkt
Enter a number:

ok, [("-e" "--expand") "Expand instead of running"

maybe expand is the solution…

shame, this as expected only actually does syntax expansion instead of generating the linklets.

yes, I think it does run the file; I’m not sure why

the usual solution is the obvious one of not having top-level expressions that do things

humm, that’s not good news. :disappointed:

@pocmatos what exactly do you plan to do with the linklet after extracting it?

most of the time, you can just take the exports and call one of them

I want to parse it for analysis.

what do you mean, take the exports?

if the linklet exports things, you can get those values and then call them

the linklet in this case is just a program, it exports nothing. Still, if I change my example so that instead of having expression at top-level, I just have a submodule main like so: #lang racket/base (require "factorial.rkt") (module+ main (let loop () (printf "Enter a number: ") (define n (read)) (cond [(exact-positive-integer? n) (printf "~a! = ~a~n" n (factorial n))] [else (printf "Invalid value~n") (loop)])))

This is what I get from:

racket bootstrap-run.rkt -x -s -t /home/pmatos/Projects/redjacket/examples/factorial-input.rkt

compile: /home/pmatos/Projects/redjacket/examples/factorial.rkt
Getting #<path:/home/pmatos/Projects/redjacket/examples/factorial-input.rkt> at 0
linklet-directory->hash: contract violation
  expected: linklet-directory?
  given: #7.3.0.12expDmainconfigure-runtimeR;?lmainp�X��configure-runtime�!1#7.3.0.12expB#hasheq((0 . #s((source-linklet linklet 0) (linklet ((.get-syntax-liter...
  context...:
   /home/pmatos/Projects/LT-racket/racket/collects/racket/private/check.rkt:82:9: linklet-directory->hash
   /home/pmatos/Projects/LT-racket/racket/src/expander/extract/module.rkt:21:0: get-compiled-module8
   /home/pmatos/Projects/LT-racket/racket/src/expander/extract/get-linklet.rkt:23:2: get-linklets!
   /home/pmatos/Projects/LT-racket/racket/src/expander/extract/main.rkt:28:0: extract25
   "/home/pmatos/Projects/LT-racket/racket/src/expander/run.rkt": [running body]
   temp37_0
   for-loop
   run-module-instance!125
   for-loop
   [repeats 1 more time]
   run-module-instance!125
   perform-require!78

will probably open an issue for this one.

Looks like -x needs a cache directory specified by -c to work right. Also, you’ll need -o to get any output.

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