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authorDavid Thompson <dthompson2@worcester.edu>2014-09-27 10:16:23 -0400
committerDavid Thompson <dthompson2@worcester.edu>2014-09-29 19:30:28 -0400
commit1b3e968512ebbccf02d00c52f7e089156946f445 (patch)
treec45d203439ab9a74d01f2c76850cafb847a755e2 /guix/import/utils.scm
parent2efb3ddaa434b86a841dffbba89e21d2d9208526 (diff)
import: Add PyPI importer.
* guix/snix.scm: Delete. * guix/import/snix.scm: New file. * guix/import/pypi.scm: New file. * guix/import/utils.scm: New file. * guix/scripts/import/nix.scm: New file. * guix/scripts/import/pypi.scm: New file. * tests/pypi.scm: New file. * tests/snix.scm: Import (guix import snix) module. * guix/scripts/import.scm (%default-options, %options): Delete. (%standard-import-options, importers): New variables. (show-help): List importers. (guix-import): Factor out Nix-specific logic. Delegate to correct importer based upon first argument. * configure.ac (HAVE_GUILE_JSON): New conditional. * Makefile.am (MODULES): Add new files and remove 'guix/snix.scm'. (SCM_TESTS): Add 'tests/pypi.scm' if guile-json is installed.
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diff --git a/guix/import/utils.scm b/guix/import/utils.scm
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+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2012, 2013 Ludovic Courtès <ludo@gnu.org>
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; GNU Guix is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (guix import utils)
+ #:use-module (ice-9 match)
+ #:use-module (ice-9 regex)
+ #:use-module (srfi srfi-1)
+ #:export (factorize-uri))
+
+(define (factorize-uri uri version)
+ "Factorize URI, a package tarball URI as a string, such that any occurrences
+of the string VERSION is replaced by the symbol 'version."
+ (let ((version-rx (make-regexp (regexp-quote version))))
+ (match (regexp-exec version-rx uri)
+ (#f
+ uri)
+ (_
+ (let ((indices (fold-matches version-rx uri
+ '((0))
+ (lambda (m result)
+ (match result
+ (((start) rest ...)
+ `((,(match:end m))
+ (,start . ,(match:start m))
+ ,@rest)))))))
+ (fold (lambda (index result)
+ (match index
+ ((start)
+ (cons (substring uri start)
+ result))
+ ((start . end)
+ (cons* (substring uri start end)
+ 'version
+ result))))
+ '()
+ indices))))))