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c29a9af656
* nonguix/utils.scm (with-transformation): New procedure. Signed-off-by: Hilton Chain <hako@ultrarare.space>
69 lines
2.4 KiB
Scheme
69 lines
2.4 KiB
Scheme
;;; SPDX-License-Identifier: GPL-3.0-or-later
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;;; Copyright © 2019 Pierre Neidhardt <mail@ambrevar.xyz>
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;;; Copyright © 2020 Jonathan Brielmaier <jonathan.brielmaier@web.de>
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(define-module (nonguix utils)
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#:use-module (srfi srfi-26)
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#:use-module (srfi srfi-43)
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#:use-module (ice-9 match)
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#:use-module (ice-9 textual-ports)
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#:use-module (ice-9 popen)
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#:use-module (guix utils)
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#:use-module (guix packages)
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#:use-module (gnu services)
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#:export (with-transformation))
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(define-public (to32 package64)
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"Build package for i686-linux.
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Only x86_64-linux and i686-linux are supported.
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- If i686-linux, return the package unchanged.
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- If x86_64-linux, return the 32-bit version of the package."
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(match (%current-system)
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("x86_64-linux"
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(package
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(inherit package64)
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(arguments `(#:system "i686-linux"
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,@(package-arguments package64)))))
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(_ package64)))
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;; For concerns and direction of improvement, see this thread:
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;; https://lists.gnu.org/archive/html/guix-devel/2024-06/msg00275.html
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(define* (with-transformation proc obj #:optional (pred package?))
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"Recursing into child elements, apply PROC to every element of OBJ that
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matches PRED."
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(match obj
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((? pred)
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(proc obj))
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((? procedure?)
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(lambda args
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(apply values
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(map (cut with-transformation proc <> pred)
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(call-with-values
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(lambda ()
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(apply obj args))
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list)))))
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((a . b)
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(cons (with-transformation proc a pred)
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(with-transformation proc b pred)))
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((_ ...)
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(map (cut with-transformation proc <> pred)
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obj))
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(#(_ ...)
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(vector-map (lambda (vec elt)
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(with-transformation proc elt pred))
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obj))
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;; `<service-type>' and `<origin>' record types are expected to not be
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;; modified. Altering them causes very difficult to debug run-time errors.
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((or (? service-type?)
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(? origin?))
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obj)
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((? record?)
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(let* ((record-type (record-type-descriptor obj))
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(record-fields (record-type-fields record-type)))
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(apply (record-constructor record-type)
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(map (lambda (field)
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(let* ((accessor (record-accessor record-type field))
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(obj (accessor obj)))
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(with-transformation proc obj pred)))
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record-fields))))
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(_ obj)))
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