gnu: Add python-pyqtwebengine.

* gnu/packages/qt.scm (python-pyqtwebengine): New variable.

gnu/packages/qt.scm

@@ -38,6 +38,7 @@
   #:use-module (guix build-system cmake)
   #:use-module (guix build-system gnu)
   #:use-module (guix build-system trivial)
+  #:use-module (guix build-system python)
   #:use-module (guix packages)
   #:use-module (guix deprecation)
   #:use-module (guix utils)
@@ -1997,6 +1998,88 @@ framework.  The bindings are implemented as a set of Python modules and
 contain over 620 classes.")
     (license license:gpl3)))
 
+(define-public python-pyqtwebengine
+  (package
+    (name "python-pyqtwebengine")
+    (version "5.12.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append
+             "https://www.riverbankcomputing.com/static/Downloads/PyQtWebEngine/"
+            version "/PyQtWebEngine_gpl-" version ".tar.gz"))
+       (sha256
+        (base32
+         "0wylkd7fh2g27y3710rpxmj9wx0wpi3z7qbv6khiddm15rkh81w6"))))
+    (build-system gnu-build-system)
+    (native-inputs
+     `(("python" ,python)
+       ("python-sip" ,python-sip)
+       ;; qtbase is required for qmake
+       ("qtbase" ,qtbase)))
+    (inputs
+     `(("python" ,python-wrapper)
+       ("python-sip" ,python-sip)
+       ("python-pyqt" ,python-pyqt)
+       ("qtbase" ,qtbase)
+       ("qtsvg" ,qtsvg)
+       ("qtdeclarative" ,qtdeclarative)
+       ("qtwebchannel" ,qtwebchannel)
+       ("python-pyqt" ,python-pyqt)
+       ("qtwebengine" ,qtwebengine)))
+    (arguments
+     `(#:modules ((srfi srfi-1)
+                  ,@%gnu-build-system-modules)
+       #:phases
+       (modify-phases %standard-phases
+         (replace 'configure
+           (lambda* (#:key inputs outputs #:allow-other-keys)
+             (let* ((out (assoc-ref outputs "out"))
+                    (sipdir (string-append out "/share/sip"))
+                    (pyqt-sipdir (string-append
+                                  (assoc-ref inputs "python-pyqt") "/share/sip"))
+                    (python (assoc-ref inputs "python"))
+                    (python-version
+                     (last (string-split python #\-)))
+                    (python-major+minor
+                     (string-join
+                      (take (string-split python-version #\.) 2) "."))
+                    (lib (string-append out "/lib/python"
+                                        python-major+minor
+                                        "/site-packages/PyQt5"))
+                    (stubs (string-append lib "/PyQt5")))
+
+               (mkdir-p sipdir)
+               (invoke "python" "configure.py"
+                       "-w"
+                       "--no-dist-info"
+                       "--destdir" lib
+                       "--no-qsci-api"
+                       "--stubsdir" stubs
+                       "--sipdir" sipdir
+                       "--pyqt-sipdir" pyqt-sipdir))))
+         ;; Because this has a different prefix than python-pyqt then we need
+         ;; to make this a namespace of it's own
+         (add-after 'install 'make-namespace
+           (lambda* (#:key inputs outputs #:allow-other-keys)
+             (let* ((__init__.py (string-append
+                                  (assoc-ref outputs "out")
+                                  "/lib/python3.7/site-packages/PyQt5/__init__.py")))
+               (with-output-to-file __init__.py
+                 (lambda _ (display "
+from pkgutil import extend_path
+__path__ = extend_path(__path__, __name__)
+")))
+               #t))))))
+    (home-page "https://www.riverbankcomputing.com/software/pyqtwebengine/intro")
+    (synopsis "Python bindings for QtWebEngine")
+    (description
+     "PyQtWebEngine is a set of Python bindings for The Qt Company's Qt
+WebEngine libraries.  The bindings sit on top of PyQt5 and are implemented as a
+set of three modules.  Prior to v5.12 these bindings were part of PyQt
+itself.")
+    (license license:gpl3)))
+
 ;; XXX: This is useful because qtwebkit does not build reliably at this time.
 ;; Ultimately, it would be nicer to have a more modular set of python-pyqt-*
 ;; packages that could be used together.