cropgui: switch to python3

Closes #2020

srcpkgs/cropgui/patches/python3-support.patch

@@ -0,0 +1,11 @@
+--- install.sh
++++ install.sh
+@@ -12,7 +12,7 @@
+ }
+ 
+ site_packages () {
+-    $PYTHON -c 'import distutils.sysconfig; print distutils.sysconfig.get_python_lib()'
++    $PYTHON -c 'import distutils.sysconfig; print(distutils.sysconfig.get_python_lib())'
+ }
+ 
+ usage () {

srcpkgs/cropgui/template

@@ -1,18 +1,18 @@
 # Template file for 'cropgui'
 pkgname=cropgui
 version=0.4
-revision=2
-hostmakedepends="which"
-makedepends="python"
-depends="python python-Pillow python-gobject2
- pygtk libjpeg-turbo-tools ImageMagick exiftool"
+revision=3
+hostmakedepends="which python3"
+depends="python3 python3-Pillow python3-gobject
+ libjpeg-turbo-tools ImageMagick exiftool"
 short_desc="Gtk frontend for lossless cropping of jpeg images"
 maintainer="Orphaned <orphan@voidlinux.org>"
 license="GPL-2.0-or-later"
 homepage="https://github.com/jepler/cropgui"
 distfiles="https://github.com/jepler/cropgui/archive/v${version}.tar.gz"
 checksum=bf5a5b14032d01799f8d942790e316203f33a7c007eedf23e57c79d5a47d6fb1
+python_version=3
 
 do_install() {
-	./install.sh -f gtk -t "$PKGDESTDIR" -P python -p /usr
+	./install.sh -f gtk -t "$PKGDESTDIR" -P python3 -p /usr
 }