[PATCH 6/7] import cran: Add "recursive" option.

[Ricardo Wurmus <ricardo.wurmus@mdc-berlin.de>]

* guix/scripts/import/cran.scm: (%options): Add "recursive" option.
(guix-import-cran): Handle "recursive" option.
---
 guix/scripts/import/cran.scm | 26 ++++++++++++++++++++------
 1 file changed, 20 insertions(+), 6 deletions(-)

diff --git a/guix/scripts/import/cran.scm b/guix/scripts/import/cran.scm
index ace1123..4cae9da 100644
--- a/guix/scripts/import/cran.scm
+++ b/guix/scripts/import/cran.scm
@@ -63,6 +63,9 @@ Import and convert the CRAN package for PACKAGE-NAME.\n"))
                  (lambda (opt name arg result)
                    (alist-cons 'repo (string->symbol arg)
                                (alist-delete 'repo result))))
+         (option '(#\r "recursive") #f #f
+                 (lambda (opt name arg result)
+                   (alist-cons 'recursive #t result)))
          %standard-import-options))
 
 \f
@@ -88,12 +91,23 @@ Import and convert the CRAN package for PACKAGE-NAME.\n"))
                            (reverse opts))))
     (match args
       ((package-name)
-       (let ((sexp (cran->guix-package package-name
-                                       (or (assoc-ref opts 'repo) 'cran))))
-         (unless sexp
-           (leave (_ "failed to download description for package '~a'~%")
-                  package-name))
-         sexp))
+       (if (assoc-ref opts 'recursive)
+           ;; Recursive import
+           (map (match-lambda
+                  ((and (label . (('package ('name name) . rest)))
+                        (label . (pkg)))
+                   `(define-public ,(string->symbol name)
+                      ,pkg))
+                  (_ #f))
+                (recursive-import package-name
+                                  (or (assoc-ref opts 'repo) 'cran)))
+           ;; Single import
+           (let ((sexp (cran->guix-package package-name
+                                           (or (assoc-ref opts 'repo) 'cran))))
+             (unless sexp
+               (leave (_ "failed to download description for package '~a'~%")
+                      package-name))
+             sexp)))
       (()
        (leave (_ "too few arguments~%")))
       ((many ...)
-- 
2.7.3