Is it possible to create a temporary file, write to it, run a command on it,
and the possibly delete the file from within a macro? Or is it possible to run
a command (as in `system`) in a context where it pretends that some file exists?
And, how does this play with DrRacket's background expansion?
The reason I'm thinking about this is that I want to call out to an external
compiler (for a language other than racket, not implemented in racket), get
information back from that compiler, and display that information in the form
of DrRacket's mouse-over-tooltips.
I tried this, and it said "forbidden (write) access" to the temporary file name
that it generated. I get this error from DrRacket's background expansion.
Is there a way to do this in a way I can use while generating DrRacket tooltips?
#lang racket
(require (for-syntax racket/file))
(define-syntax m
(λ (stx)
(define tmp (make-temporary-file))
(display-to-file "hello there\n" tmp #:exists 'replace)
#'(begin)))
(m)
;open-output-file: forbidden (write) access to
;/var/folders/6f/5335m44s43g1zd2vqs7jmqsh0000gp/T/unsaved
editor-7-16_15411123141541112314481
Alex Knauth
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