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locale: Add 'glibc-supported-locales'. 

* gnu/system/locale.scm (glibc-supported-locales): New procedure.
This commit is contained in:
Ludovic Courtès 2019-05-13 23:28:32 +02:00
parent b33454ae0b
commit 1be065c478
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GPG Key ID: 090B11993D9AEBB5
1 changed files with 70 additions and 2 deletions
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72
gnu/system/locale.scm
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@ -1,5 +1,5 @@
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2014, 2015, 2016, 2017 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2014, 2015, 2016, 2017, 2019 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2018 Mark H Weaver <mhw@netris.org>
;;;
;;; This file is part of GNU Guix.
@ -20,6 +20,7 @@
(define-module (gnu system locale)
#:use-module (guix gexp)
#:use-module (guix store)
#:use-module (guix modules)
#:use-module (guix records)
#:use-module (guix packages)
#:use-module (guix utils)
@ -37,7 +38,9 @@
locale-directory
%default-locale-libcs
%default-locale-definitions))
%default-locale-definitions
glibc-supported-locales))
;;; Commentary:
;;;
@ -202,4 +205,69 @@ data format changes between libc versions."
"vi_VN"
"zh_CN"))))
;;;
;;; Locales supported by glibc.
;;;
(define* (glibc-supported-locales #:optional (glibc glibc))
"Return a file-like object that contains a list of locale name/encoding
pairs such as (\"oc_FR.UTF-8\" . \"UTF-8\"). Each pair corresponds to a
locale supported by GLIBC."
(define build
(with-imported-modules (source-module-closure
'((guix build gnu-build-system)))
#~(begin
(use-modules (guix build gnu-build-system)
(srfi srfi-1)
(ice-9 rdelim)
(ice-9 match)
(ice-9 regex)
(ice-9 pretty-print))
(define unpack
(assq-ref %standard-phases 'unpack))
(define locale-rx
;; Regexp matching a locale line in 'localedata/SUPPORTED'.
(make-regexp
"^[[:space:]]*([[:graph:]]+)/([[:graph:]]+)[[:space:]]*\\\\$"))
(define (read-supported-locales port)
;; Read the 'localedata/SUPPORTED' file from PORT. That file is
;; actually a makefile snippet, with one locale per line, and a
;; header that can be discarded.
(let loop ((locales '()))
(define line
(read-line port))
(cond ((eof-object? line)
(reverse locales))
((string-prefix? "#" (string-trim line)) ;comment
(loop locales))
((string-contains line "=") ;makefile variable assignment
(loop locales))
(else
(match (regexp-exec locale-rx line)
(#f
(loop locales))
(m
(loop (alist-cons (match:substring m 1)
(match:substring m 2)
locales))))))))
(setenv "PATH"
(string-append #+(file-append tar "/bin") ":"
#+(file-append xz "/bin") ":"
#+(file-append gzip "/bin")))
(unpack #:source #+(package-source glibc))
(let ((locales (call-with-input-file "localedata/SUPPORTED"
read-supported-locales)))
(call-with-output-file #$output
(lambda (port)
(pretty-print locales port)))))))
(computed-file "glibc-supported-locales.scm" build))
;;; locale.scm ends here