import: elpa: Add recursive import.

* doc/guix.texi (Invoking guix import): Document elpa recursive import.
* guix/import/elpa.scm (elpa-package->sexp): Return package and
dependencies values.
(elpa-guix-name, elpa-recursive-import): New procedures.
* guix/scripts/import/elpa.scm (show-help, %options): Add recursive
option.
(guix-import-elpa): Use 'elpa-recursive-import'.

1 files changed, 22 insertions, 4 deletions

diff --git a/guix/scripts/import/elpa.scm b/guix/scripts/import/elpa.scm
index 34eb16485e..f1ed5016ba 100644
--- a/guix/scripts/import/elpa.scm
+++ b/guix/scripts/import/elpa.scm
@@ -1,5 +1,6 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2015 Federico Beffa <beffa@fbengineering.ch>
+;;; Copyright © 2018 Oleg Pykhalov <go.wigust@gmail.com>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -21,10 +22,12 @@
   #:use-module (guix utils)
   #:use-module (guix scripts)
   #:use-module (guix import elpa)
+  #:use-module (guix import utils)
   #:use-module (guix scripts import)
   #:use-module (srfi srfi-1)
   #:use-module (srfi srfi-11)
   #:use-module (srfi srfi-37)
+  #:use-module (srfi srfi-41)
   #:use-module (ice-9 match)
   #:use-module (ice-9 format)
   #:export (guix-import-elpa))
@@ -45,6 +48,8 @@ Import the latest package named PACKAGE-NAME from an ELPA repository.\n"))
   (display (G_ "
   -h, --help                     display this help and exit"))
   (display (G_ "
+  -r, --recursive                generate package expressions for all Emacs packages that are not yet in Guix"))
+  (display (G_ "
   -V, --version                  display version information and exit"))
   (newline)
   (show-bug-report-information))
@@ -62,6 +67,9 @@ Import the latest package named PACKAGE-NAME from an ELPA repository.\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))
 
 
@@ -87,10 +95,20 @@ Import the latest package named PACKAGE-NAME from an ELPA repository.\n"))
                            (reverse opts))))
     (match args
       ((package-name)
-       (let ((sexp (elpa->guix-package package-name (assoc-ref opts 'repo))))
-         (unless sexp
-           (leave (G_ "failed to download package '~a'~%") package-name))
-         sexp))
+       (if (assoc-ref opts 'recursive)
+           (map (match-lambda
+                  ((and ('package ('name name) . rest) pkg)
+                   `(define-public ,(string->symbol name)
+                      ,pkg))
+                  (_ #f))
+                (reverse
+                 (stream->list
+                  (elpa-recursive-import package-name
+                                         (or (assoc-ref opts 'repo) 'gnu)))))
+           (let ((sexp (elpa->guix-package package-name (assoc-ref opts 'repo))))
+             (unless sexp
+               (leave (G_ "failed to download package '~a'~%") package-name))
+             sexp)))
       (()
        (leave (G_ "too few arguments~%")))
       ((many ...)