I think we need more of your program to help. In particular, I don't
know what you have in mind with `(define-namespace-anchor a)`, and I
wonder whether your program uses `load` or `dynamic-require`.
I tried completing your example with
app.rkt:
#lang racket
(require "words.rkt"
racket/serialize)
;; write serialized
(writeln (serialize (word 1 2)))
;; read something that must have been previously serialized
(deserialize (read (current-input-port)))
words.rkt:
#lang racket
(require racket/serialize)
(provide (struct-out word))
(serializable-struct word
(type
ecc.))
but that works as expected, where the serialized output has something
like "#%embedded:g2140:words" instead of a path.
At Fri, 12 Aug 2016 05:53:35 -0700 (PDT), rumpz wrote:
> app.rkt:
>
> #lang racket
> (require "words.rkt"
> web-server/servlet)
>
> ....
>
>
> words.rkt:
>
> #lang racket
> (require racket/serialize)
> (provide (struct-out word) save-words load-words decline)
>
> (serializable-struct word
> (type
> ecc.))
>
> (define-namespace-anchor a)
> (define ns (namespace-anchor->namespace a))
>
> ....
>
>
> If I compile app.rkt with "raco exe app.rkt" and "raco distribute appdir app"
> and I move the "appdir" directory to another system, when I run ./app it
> crashes with this error:
>
> default-load-handler: cannot open module file
> module path: #<path:/home/rumpz/webapp/words.rkt>
> path: /home/rumpz/webapp/words.rkt
> system error: No such file or directory; errno=2
> context...:
> standard-module-name-resolver
> /usr/share/racket/collects/racket/private/serialize.rkt:654:8: loop
> /usr/share/racket/collects/racket/private/serialize.rkt:649:2: deserialize
> #%mzc:app: [running body]
>
>
> Even if I don't move from my system but just rename words.rkt, it still
> crashes. From the examples and the documentation I assumed that raco
> automatically included required modules, but it looks like it's just looking
> for the .rkt file (and even with the exact path that it has on the original
> system). What am I doing wrong?
>
> Also, a secondary problem with modules that may be related: I've tried to
> make
> a copy of the "webapp" directory, called webapp2. When I launch app from the
> new directory, it loads a list of "word" structures from a file I saved them
> in previously, and try to access them with a "word" field (like "word-type")
> it crashes with:
>
> word-type: contract violation;
> given value instantiates a different structure type with the same name
> expected: word?
> given: #<word>
>
> It's like it marked down somewhere that those structs refer to the definition
> of "word" in webapp/words.rkt, and not the one in webapp2/words.rkt
>
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