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store: Fix many guix commands failing on some locales.

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Partly fixes <https://bugs.gnu.org/39970>.

At least 'guix environment', 'guix install' and 'guix pull'
on 'az_AZ.utf8' and 'tr_TR.utf8' were affected.

* guix/store.scm (store-path-hash-part): Move base path detection to ...
(store-path-base): ... this new exported procedure.
(store-path-package-name): Use it instead of locale-dependent regexps.
(store-regexp*): Remove.
This commit is contained in:
Florian Pelz 2020-03-12 11:08:16 +01:00
parent 6794653e1b
commit 771c5e155d
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1 changed files with 15 additions and 17 deletions
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32
guix/store.scm
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@ -2,6 +2,7 @@
;;; Copyright © 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2018 Jan Nieuwenhuizen <janneke@gnu.org>
;;; Copyright © 2019, 2020 Mathieu Othacehe <m.othacehe@gmail.com>
;;; Copyright © 2020 Florian Pelz <pelzflorian@pelzflorian.de>
;;;
;;; This file is part of GNU Guix.
;;;
@ -43,7 +44,6 @@
#:use-module (srfi srfi-35)
#:use-module (srfi srfi-39)
#:use-module (ice-9 match)
#:use-module (ice-9 regex)
#:use-module (ice-9 vlist)
#:use-module (ice-9 popen)
#:use-module (ice-9 threads)
@ -173,6 +173,7 @@
store-path?
direct-store-path?
derivation-path?
store-path-base
store-path-package-name
store-path-hash-part
direct-store-path
@ -1949,29 +1950,26 @@ valid inputs."
"Return #t if PATH is a derivation path."
(and (store-path? path) (string-suffix? ".drv" path)))
(define store-regexp*
;; The substituter makes repeated calls to 'store-path-hash-part', hence
;; this optimization.
(mlambda (store)
"Return a regexp matching a file in STORE."
(make-regexp (string-append "^" (regexp-quote store)
"/([0-9a-df-np-sv-z]{32})-([^/]+)$"))))
(define (store-path-base path)
"Return the base path of a path in the store."
(and (string-prefix? (%store-prefix) path)
(let ((base (string-drop path (+ 1 (string-length (%store-prefix))))))
(and (> (string-length base) 33)
(not (string-index base #\/))
base))))
(define (store-path-package-name path)
"Return the package name part of PATH, a file name in the store."
(let ((path-rx (store-regexp* (%store-prefix))))
(and=> (regexp-exec path-rx path)
(cut match:substring <> 2))))
(let ((base (store-path-base path)))
(string-drop base (+ 32 1)))) ;32 hash part + 1 hyphen
(define (store-path-hash-part path)
"Return the hash part of PATH as a base32 string, or #f if PATH is not a
syntactically valid store path."
(and (string-prefix? (%store-prefix) path)
(let ((base (string-drop path (+ 1 (string-length (%store-prefix))))))
(and (> (string-length base) 33)
(let ((hash (string-take base 32)))
(and (string-every %nix-base32-charset hash)
hash))))))
(let* ((base (store-path-base path))
(hash (string-take base 32)))
(and (string-every %nix-base32-charset hash)
hash)))
(define (derivation-log-file drv)
"Return the build log file for DRV, a derivation file name, or #f if it