gnu: didjvu: Switch to a Python 3 compatible fork.

* gnu/packages/djvu.scm (didjvu)[source]: Switch to a Python 3 compatible
fork.
[native-inputs, inputs]: Move below arguments field.  Use new style.  Replace
the Python 2 inputs by their Python 3 equivalents.

gnu/packages/djvu.scm

@@ -3,6 +3,7 @@
 ;;; Copyright © 2020 Nicolas Goaziou <mail@nicolasgoaziou.fr>
 ;;; Copyright © 2020 Tobias Geerinckx-Rice <me@tobias.gr>
 ;;; Copyright © 2020, 2021 Guillaume Le Vaillant <glv@posteo.net>
+;;; Copyright © 2022 Maxim Cournoyer <maxim.cournoyer@gmail.com>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -292,26 +293,21 @@ and white.")
     (license license:gpl2)))
 
 (define-public didjvu
+  (let ((revision "0")
+        (commit "c792d61e85fbe5b6e678bc7d686b0208717c587b"))
     (package
       (name "didjvu")
-    (version "0.9")
-    (source
-     (origin
-       (method url-fetch)
-       (uri (string-append
-             "https://github.com/jwilk/didjvu/releases/download/" version
-             "/didjvu-" version ".tar.gz"))
+      (version (git-version "0.9" revision commit))
+      (source (origin
+                (method git-fetch)
+                (uri (git-reference
+                      (url "https://github.com/FriedrichFroebel/didjvu")
+                      (commit commit)))
+                (file-name (git-file-name name version))
                 (sha256
-        (base32 "0xyrnk8d2khi7q1zr28gjkjq6frz4mkb5jdl8821yzf12k7c8pbv"))))
+                 (base32
+                  "09lwfwirmfl93062i2rvdcrgwp9fj95ny07059bxq7dl6z0z35qj"))))
       (build-system gnu-build-system)
-    (native-inputs
-     (list python2-nose))
-    (inputs
-     `(("djvulibre" ,djvulibre)
-       ("minidjvu" ,minidjvu)
-       ("python" ,python-2)
-       ("python2-gamera" ,python2-gamera)
-       ("python2-pillow" ,python2-pillow)))
       (arguments
        `(#:modules ((guix build gnu-build-system)
                     ((guix build python-build-system) #:prefix python:)
@@ -351,12 +347,19 @@ and white.")
                      (djvulibre (assoc-ref inputs "djvulibre")))
                  (wrap-program (string-append out "/bin/didjvu")
                    `("PATH" ":" prefix (,(string-append djvulibre "/bin"))))))))))
+      (native-inputs (list python-nose))
+      (inputs
+       (list djvulibre
+             minidjvu
+             python-gamera
+             python-pillow
+             python-wrapper))
       (synopsis "DjVu encoder with foreground/background separation")
       (description
        "@code{didjvu} uses the @code{Gamera} framework to separate the foreground
 and background layers of images, which can then be encoded into a DjVu file.")
       (home-page "https://jwilk.net/software/didjvu")
-    (license license:gpl2)))
+      (license license:gpl2))))
 
 (define-public ocrodjvu
   (let ((revision "0")