gnu: Add python-json5.

* gnu/packages/python-xyz.scm (python-json5): New variable.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

gnu/packages/python-xyz.scm

@@ -73,6 +73,7 @@
 ;;; Copyright © 2020 Alexandros Theodotou <alex@zrythm.org>
 ;;; Copyright © 2020 Josh Marshall <joshua.r.marshall.1991@gmail.com>
 ;;; Copyright © 2020 Alexandros Theodotou <alex@zrythm.org>
+;;; Copyright © 2020 Lars-Dominik Braun <ldb@leibniz-psychology.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -18704,3 +18705,27 @@ evolved from its precursor @code{overtest}.")
     (description "This package provides a pytest plugin that checks URLs for
 HTML-containing files.")
     (license license:bsd-3)))
+
+(define-public python-json5
+  (package
+    (name "python-json5")
+    (version "0.8.5")
+    (source
+     (origin
+       ;; sample.json5 is missing from PyPi source tarball
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://github.com/dpranke/pyjson5.git")
+             (commit (string-append "v" version))))
+       (file-name (git-file-name name version))
+       (sha256
+        (base32 "0nyngj18jlkgvm1177lc3cj47wm4yh3dqigygvcvw7xkyryafsqn"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/dpranke/pyjson5")
+    (synopsis
+     "Python implementation of the JSON5 data format")
+    (description
+     "JSON5 extends the JSON data interchange format to make it slightly more
+usable as a configuration language.  This Python package implements parsing and
+dumping of JSON5 data structures.")
+    (license license:asl2.0)))