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[bug#39599] [PATCH 1/4] build-system: Add copy-build-system.

From: Pierre Neidhardt
Subject: [bug#39599] [PATCH 1/4] build-system: Add copy-build-system.
Date: Thu, 20 Feb 2020 11:00:32 +0100

Ricardo Wurmus <address@hidden> writes:

> --8<---------------cut here---------------start------------->8---
> (define* (make-file-predicate suffixes matches-regexp #:optional 
> (default-value #t))
>   (if (or suffixes matches-regexp)
>       (let* ((suffixes (or suffixes '()))
>              (regexps (map make-regexp (or matches-regexp '())))
>              (predicates (append
>                           (map (lambda (str)
>                                  (cut string-suffix? str <>))
>                                suffixes)
>                           (map (lambda (regexp)
>                                  (cut regexp-exec regexp <>))
>                                regexps))))
>         (lambda (file)
>           (any (cut <> file) predicates)))
>       (const default-value)))
> --8<---------------cut here---------------end--------------->8---

Good suggestion, thanks!

The logic of this function is a bit convoluted in my opinion, but I
can't think of something simpler and just as short.  But since it's a
local function, I guess it's not a big deal.

> Also, as Mathieu wrote, please don’t use SET!.

No problem, but I don't recall seeing this message.  Where did Mathieu
write this?

Pierre Neidhardt

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