@@ -2,6 +2,7 @@
;;; Copyright © 2014 David Thompson <davet@gnu.org>
;;; Copyright © 2015, 2016 Eric Bavier <bavier@member.fsf.org>
;;; Copyright © 2018, 2019 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2020 Ricardo Wurmus <rekado@elephly.net>
;;;
;;; This file is part of GNU Guix.
;;;
@@ -22,8 +23,12 @@
#:use-module (json)
#:use-module (guix http-client)
#:use-module (guix import utils)
+ #:use-module (guix import print)
+ #:use-module (ice-9 rdelim)
+ #:use-module (srfi srfi-2)
#:use-module (srfi srfi-34)
- #:export (json-fetch))
+ #:export (json-fetch
+ json->scheme-file))
(define* (json-fetch url
;; Note: many websites returns 403 if we omit a
@@ -42,3 +47,31 @@ the query."
(result (json->scm port)))
(close-port port)
result)))
+
+(define (json->code file-name)
+ "Read FILE-NAME containing a JSON package definition and return an
+S-expression, or return #F when the JSON is invalid."
+ (catch 'json-invalid
+ (lambda ()
+ (let ((json (json-string->scm
+ (with-input-from-file file-name read-string))))
+ (package->code (alist->package json))))
+ (const #f)))
+
+(define (json->scheme-file file)
+ "Convert the FILE containing a JSON package definition to a Scheme
+representation and return the new file name (or #F on error)."
+ (and-let* ((json (json->code file))
+ (file* (let* ((tempdir (or (getenv "TMPDIR") "/tmp"))
+ (template (string-append tempdir "/guix-XXXXXX"))
+ (port (mkstemp! template)))
+ (close-port port)
+ template)))
+ (call-with-output-file file*
+ (lambda (port)
+ (write '(use-modules (gnu)
+ (guix)
+ ((guix licenses) #:prefix license:))
+ port)
+ (write json port)))
+ file*))