import: Add 'elpa' importer.

* guix/import/elpa.scm: New file.
* guix/scripts/import.scm: Add "elpa" to 'importers'.
* guix/scripts/import/elpa.scm: New file.
* Makefile.am (MODULES): Add 'guix/import/elpa.scm' and
  'guix/scripts/import/elpa.scm'.
  (SCM_TESTS): Add 'tests/elpa.scm'.
* doc/guix.texi (Invoking guix import): Document it.
* tests/elpa.scm: New file.
* po/guix/POTFILES.in: Add 'guix/scripts/import/elpa.scm'.

1 files changed, 109 insertions, 0 deletions

diff --git a/tests/elpa.scm b/tests/elpa.scm
new file mode 100644
index 0000000000..5d2914b8df
--- /dev/null
+++ b/tests/elpa.scm
@@ -0,0 +1,109 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2015 Federico Beffa <beffa@fbengineering.ch>
+;;;
+;;; 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-elpa)
+  #:use-module (guix import elpa)
+  #:use-module (guix tests)
+  #:use-module (srfi srfi-1)
+  #:use-module (srfi srfi-64)
+  #:use-module (ice-9 match))
+
+(define elpa-mock-archive
+  '(1
+    (ace-window .
+                [(0 9 0)
+                 ((avy
+                   (0 2 0)))
+                 "Quickly switch windows." single
+                 ((:url . "https://github.com/abo-abo/ace-window")
+                  (:keywords "window" "location"))])
+    (auctex .
+            [(11 88 6)
+             nil "Integrated environment for *TeX*" tar
+             ((:url . "http://www.gnu.org/software/auctex/"))])))
+
+(define auctex-readme-mock "This is the AUCTeX description.")
+
+(define* (elpa-package-info-mock name #:optional (repo "gnu"))
+  "Simulate retrieval of 'archive-contents' file from REPO and extraction of
+information about package NAME. (Function 'elpa-package-info'.)"
+  (let* ((archive elpa-mock-archive)
+         (info (filter (lambda (p) (eq? (first p) (string->symbol name)))
+                       (cdr archive))))
+    (if (pair? info) (first info) #f)))
+
+(define elpa-version->string
+  (@@ (guix import elpa) elpa-version->string))
+
+(define package-source-url
+  (@@ (guix import elpa) package-source-url))
+
+(define nil->empty
+  (@@ (guix import elpa) nil->empty))
+
+(define package-home-page
+  (@@ (guix import elpa) package-home-page))
+
+(define make-elpa-package
+  (@@ (guix import elpa) make-elpa-package))
+
+(test-begin "elpa")
+
+(define (eval-test-with-elpa pkg)
+  (mock
+   ;; replace the two fetching functions
+   ((guix import elpa) fetch-elpa-package
+    (lambda* (name #:optional (repo "gnu"))
+      (let ((pkg (elpa-package-info-mock name repo)))
+        (match pkg
+          ((name version reqs synopsis kind . rest)
+           (let* ((name (symbol->string name))
+                  (ver (elpa-version->string version))
+                  (url (package-source-url kind name ver repo)))
+             (make-elpa-package name ver
+                                (nil->empty reqs) synopsis kind
+                                (package-home-page (first rest))
+                                auctex-readme-mock
+                                url)))
+          (_ #f)))))
+   (match (elpa->guix-package pkg)
+     (('package
+        ('name "emacs-auctex")
+        ('version "11.88.6")
+        ('source
+         ('origin
+           ('method 'url-fetch)
+           ('uri ('string-append
+                  "http://elpa.gnu.org/packages/auctex-" 'version ".tar"))
+           ('sha256 ('base32 (? string? hash)))))
+        ('build-system 'emacs-build-system)
+        ('home-page "http://www.gnu.org/software/auctex/")
+        ('synopsis "Integrated environment for *TeX*")
+        ('description (? string?))
+        ('license 'license:gpl3+))
+      #t)
+     (x
+      (pk 'fail x #f)))))
+
+(test-assert "elpa->guix-package test 1"
+  (eval-test-with-elpa "auctex"))
+
+(test-end "elpa")
+
+
+(exit (= (test-runner-fail-count (test-runner-current)) 0))