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.

2 files changed, 104 insertions, 2 deletions

diff --git a/tests/pypi.scm b/tests/pypi.scm
new file mode 100644
index 0000000000..124c512d54
--- /dev/null
+++ b/tests/pypi.scm
@@ -0,0 +1,102 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2014 David Thompson <davet@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 (test-pypi)
+  #:use-module (guix import pypi)
+  #:use-module (guix base32)
+  #:use-module (guix hash)
+  #:use-module (srfi srfi-64)
+  #:use-module (ice-9 match))
+
+(define-syntax-rule (mock (module proc replacement) body ...)
+  (let* ((m (resolve-module 'module))
+         (original (module-ref m 'proc)))
+    (dynamic-wind
+      (lambda () (module-set! m 'proc replacement))
+      (lambda () body ...)
+      (lambda () (module-set! m 'proc original)))))
+
+(define test-json
+  "{
+  \"info\": {
+    \"version\": \"1.0.0\",
+    \"name\": \"foo\",
+    \"license\": \"GNU LGPL\",
+    \"summary\": \"summary\",
+    \"home_page\": \"http://example.com\",
+  },
+  \"releases\": {
+    \"1.0.0\": [
+      {
+        \"url\": \"https://example.com/foo-1.0.0.egg\",
+        \"packagetype\": \"bdist_egg\",
+      }, {
+        \"url\": \"https://example.com/foo-1.0.0.tar.gz\",
+        \"packagetype\": \"sdist\",
+      }
+    ]
+  }
+}")
+
+(define test-source
+  "foobar")
+
+(test-begin "pypi")
+
+(test-assert "pypi->guix-package"
+  ;; Replace network resources with sample data.
+  (mock ((guix import pypi) url-fetch
+         (lambda (url file-name)
+           (with-output-to-file file-name
+             (lambda ()
+               (display
+                (match url
+                  ("https://pypi.python.org/pypi/foo/json"
+                   test-json)
+                  ("https://example.com/foo-1.0.0.tar.gz"
+                   test-source)
+                  (_ (error "Unexpected URL: " url))))))))
+    (match (pypi->guix-package "foo")
+      (('package
+         ('name "python-foo")
+         ('version "1.0.0")
+         ('source ('origin
+                    ('method 'url-fetch)
+                    ('uri ('string-append "https://example.com/foo-"
+                                          'version ".tar.gz"))
+                    ('sha256
+                     ('base32
+                      (? string? hash)))))
+         ('build-system 'python-build-system)
+         ('inputs
+          ('quasiquote
+           (("python-setuptools" ('unquote 'python-setuptools)))))
+         ('home-page "http://example.com")
+         ('synopsis "summary")
+         ('description "summary")
+         ('license 'lgpl2.0))
+       (string=? (bytevector->nix-base32-string
+                  (call-with-input-string test-source port-sha256))
+                 hash))
+      (x
+       (pk 'fail x #f)))))
+
+(test-end "pypi")
+
+
+(exit (= (test-runner-fail-count (test-runner-current)) 0))
diff --git a/tests/snix.scm b/tests/snix.scm
index 9d692e9c02..2318780d3d 100644
--- a/tests/snix.scm
+++ b/tests/snix.scm
@@ -17,14 +17,14 @@
 ;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
 
 (define-module (test-snix)
-  #:use-module (guix snix)
+  #:use-module (guix import snix)
   #:use-module ((guix utils) #:select (%nixpkgs-directory))
   #:use-module (srfi srfi-1)
   #:use-module (srfi srfi-64)
   #:use-module (ice-9 match))
 
 (define factorize-uri
-  (@@ (guix snix) factorize-uri))
+  (@@ (guix import snix) factorize-uri))
 
 (define-syntax-rule (every? proc lists ...)
   (not (not (every proc lists ...))))