import: Add 'cran' importer.

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

1 files changed, 178 insertions, 0 deletions

diff --git a/tests/cran.scm b/tests/cran.scm
new file mode 100644
index 0000000000..c9cb5f69d0
--- /dev/null
+++ b/tests/cran.scm
@@ -0,0 +1,178 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2015 Ricardo Wurmus <rekado@elephly.net>
+;;;
+;;; 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-cran)
+  #:use-module (guix import cran)
+  #:use-module (guix tests)
+  #:use-module (srfi srfi-64)
+  #:use-module (ice-9 match))
+
+(define sxml
+  '(*TOP* (xhtml:html
+           (xhtml:head
+            (xhtml:title "CRAN - Package my-example-sxml"))
+           (xhtml:body
+            (xhtml:h2 "my-example-sxml: Short description")
+            (xhtml:p "Long description")
+            (xhtml:table
+             (@ (summary "Package my-example-sxml summary"))
+             (xhtml:tr
+              (xhtml:td "Version:")
+              (xhtml:td "1.2.3"))
+             (xhtml:tr
+              (xhtml:td "Depends:")
+              (xhtml:td "R (>= 3.1.0)"))
+             (xhtml:tr
+              (xhtml:td "SystemRequirements:")
+              (xhtml:td "cairo (>= 1.2 http://www.cairographics.org/)"))
+             (xhtml:tr
+              (xhtml:td "Imports:")
+              (xhtml:td
+               (xhtml:a (@ (href "../scales/index.html"))
+                        "scales")
+               " (>= 0.2.3), "
+               (xhtml:a (@ (href "../proto/index.html"))
+                        "proto")
+               ", "
+               (xhtml:a (@ (href "../Rcpp/index.html")) "Rcpp")
+               " (>= 0.11.0)"))
+             (xhtml:tr
+              (xhtml:td "Suggests:")
+              (xhtml:td
+               (xhtml:a (@ (href "../some/index.html"))
+                        "some")
+               ", "
+               (xhtml:a (@ (href "../suggestions/index.html"))
+                        "suggestions")))
+             (xhtml:tr
+              (xhtml:td "License:")
+              (xhtml:td
+               (xhtml:a (@ (href "../../licenses/MIT")) "MIT")))
+             (xhtml:tr
+              (xhtml:td "URL:")
+              (xhtml:td
+               (xhtml:a (@ (href "http://gnu.org/s/my-example-sxml"))
+                        "http://gnu.org/s/my-example-sxml")
+               ", "
+               (xhtml:a (@ (href "http://alternative/home/page"))
+                        "http://alternative/home/page"))))
+            (xhtml:h4 "Downloads:")
+            (xhtml:table
+             (@ (summary "Package my-example-sxml downloads"))
+             (xhtml:tr
+              (xhtml:td " Reference manual: ")
+              (xhtml:td
+               (xhtml:a (@ (href "my-example-sxml.pdf"))
+                        " my-example-sxml.pdf ")))
+             (xhtml:tr
+              (xhtml:td " Package source: ")
+              (xhtml:td
+               (xhtml:a
+                (@ (href "../../../src/contrib/my-example-sxml_1.2.3.tar.gz"))
+                " my-example-sxml_1.2.3.tar.gz "))))
+            (xhtml:h4 "Reverse dependencies:")
+            (xhtml:table
+             (@ (summary "Package my-example-sxml reverse dependencies"))
+             (xhtml:tr
+              (xhtml:td "Reverse depends:")
+              (xhtml:td "Too many."))
+             (xhtml:tr
+              (xhtml:td "Reverse imports:")
+              (xhtml:td "Likewise."))
+             (xhtml:tr
+              (xhtml:td "Reverse suggests:")
+              (xhtml:td "Uncountable.")))))))
+
+(define simple-table
+  '(xhtml:table
+    (xhtml:tr
+     (xhtml:td "Numbers")
+     (xhtml:td "123"))
+    (xhtml:tr
+     (@ (class "whatever"))
+     (xhtml:td (@ (class "unimportant")) "Letters")
+     (xhtml:td "abc"))
+    (xhtml:tr
+     (xhtml:td "Letters")
+     (xhtml:td "xyz"))
+    (xhtml:tr
+     (xhtml:td "Single"))
+    (xhtml:tr
+     (xhtml:td "not a value")
+     (xhtml:td "not a label")
+     (xhtml:td "also not a label"))))
+
+(test-begin "cran")
+
+(test-equal "table-datum: return list of first table cell matching label"
+  '((xhtml:td "abc"))
+  ((@@ (guix import cran) table-datum) simple-table "Letters"))
+
+(test-equal "table-datum: return empty list if no match"
+  '()
+  ((@@ (guix import cran) table-datum) simple-table "Astronauts"))
+
+(test-equal "table-datum: only consider the first cell as a label cell"
+  '()
+  ((@@ (guix import cran) table-datum) simple-table "not a label"))
+
+
+(test-assert "cran-sxml->sexp"
+  ;; Replace network resources with sample data.
+  (mock ((guix build download) url-fetch
+         (lambda* (url file-name #:key (mirrors '()))
+           (with-output-to-file file-name
+             (lambda ()
+               (display
+                (match url
+                  ("mirror://cran/src/contrib/my-example-sxml_1.2.3.tar.gz"
+                   "source")
+                  (_ (error "Unexpected URL: " url))))))))
+    (match ((@@ (guix import cran) cran-sxml->sexp) sxml)
+      (('package
+         ('name "r-my-example-sxml")
+         ('version "1.2.3")
+         ('source ('origin
+                    ('method 'url-fetch)
+                    ('uri ('string-append "mirror://cran/src/contrib/my-example-sxml_"
+                                          'version ".tar.gz"))
+                    ('sha256
+                     ('base32
+                      (? string? hash)))))
+         ('build-system 'r-build-system)
+         ('inputs
+          ('quasiquote
+           (("cairo" ('unquote 'cairo)))))
+         ('propagated-inputs
+          ('quasiquote
+           (("r-proto" ('unquote 'r-proto))
+            ("r-rcpp" ('unquote 'r-rcpp))
+            ("r-scales" ('unquote 'r-scales)))))
+         ('home-page "http://gnu.org/s/my-example-sxml")
+         ('synopsis "Short description")
+         ('description "Long description")
+         ('license 'x11)))
+      (x
+       (begin
+         (format #t "~s\n" x)
+         (pk 'fail x #f))))))
+
+(test-end "cran")
+
+
+(exit (= (test-runner-fail-count (test-runner-current)) 0))