83 lines
3.4 KiB
Scheme
83 lines
3.4 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2016 David Craven <david@craven.ch>
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;;; Copyright © 2017 Mathieu Othacehe <m.othacehe@gmail.com>
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;;; Copyright © 2019 Ivan Petkov <ivanppetkov@gmail.com>
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;;; Copyright © 2019 Efraim Flashner <efraim@flashner.co.il>
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;;;
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;;; This file is part of GNU Guix.
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;;;
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;;; GNU Guix is free software; you can redistribute it and/or modify it
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;;; under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation; either version 3 of the License, or (at
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;;; your option) any later version.
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;;;
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;;; GNU Guix is distributed in the hope that it will be useful, but
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;;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;; GNU General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
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(define-module (guix build cargo-utils)
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#:use-module (guix build utils)
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#:use-module (ice-9 popen)
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#:use-module (ice-9 rdelim)
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#:export (generate-checksums
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generate-all-checksums))
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;; Commentary:
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;;
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;; Stand alone utilities for building Rust crates or the compiler itself,
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;; without depending on the entire cargo build-system itself.
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;;
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;; Code:
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(define (file-sha256 file-name)
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"Calculate the hexdigest of the sha256 checksum of FILE-NAME and return it."
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(let ((port (open-pipe* OPEN_READ
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"sha256sum"
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"--"
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file-name)))
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(let ((result (read-delimited " " port)))
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(close-pipe port)
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result)))
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(define (generate-checksums dir-name)
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"Given DIR-NAME, a store directory, checksum all the files in it one
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by one and put the result into the file \".cargo-checksum.json\" in
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the same directory."
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(let* ((file-names (find-files dir-name "."))
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(dir-prefix-name (string-append dir-name "/"))
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(dir-prefix-name-len (string-length dir-prefix-name))
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(checksums-file-name (string-append dir-name "/.cargo-checksum.json")))
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(call-with-output-file checksums-file-name
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(lambda (port)
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(display "{\"files\":{" port)
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(let ((sep ""))
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(for-each (lambda (file-name)
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(let ((file-relative-name (string-drop file-name dir-prefix-name-len)))
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(display sep port)
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(set! sep ",")
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(write file-relative-name port)
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(display ":" port)
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(write (file-sha256 file-name) port))) file-names))
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;; NB: cargo requires the "package" field in order to check if the Cargo.lock
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;; file needs to be regenerated when the value changes. However, it doesn't
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;; appear to care what the value is to begin with...
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(display "},\"package\":" port)
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(write (file-sha256 "/dev/null") port)
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(display "}" port)))))
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(define (generate-all-checksums dir-name)
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(for-each
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(lambda (filename)
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(let* ((dir (dirname filename))
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(checksum-file (string-append dir "/.cargo-checksum.json")))
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(when (file-exists? checksum-file) (delete-file checksum-file))
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(display (string-append
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"patch-cargo-checksums: generate-checksums for "
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dir "\n"))
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(generate-checksums dir)))
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(find-files dir-name "Cargo.toml$")))
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