openimageio: switch to py3, use external pugixml

This switches oiio's Python bindings to Python 3, removing a dependency
on boost_python27. Also switches to system pugixml which fixes a problem
seen with Andrea Fleckenstein's update of Blender if pugixml is present
at build time. Blender 2.79 still seems happy.

While there I sorted LIB_DEPENDS and used a construct from python.port.mk
rather than handrolled regex.

OK?

Index: Makefile
===================================================================
RCS file: /cvs/ports/graphics/openimageio/Makefile,v
retrieving revision 1.45
diff -u -p -w -u -r1.45 Makefile
--- Makefile 13 Nov 2020 23:25:38 -0000 1.45
+++ Makefile 16 Nov 2020 16:34:07 -0000
@@ -7,12 +7,12 @@ COMMENT = library for reading and writi

GH_ACCOUNT = OpenImageIO
GH_PROJECT = oiio
-V = 1.8.6
GH_TAGNAME = Release-$V
+V = 1.8.6
DISTNAME = openimageio-${V}
-REVISION = 10
+REVISION = 11

-SHARED_LIBS += OpenImageIO 5.0 # 1.0
+SHARED_LIBS += OpenImageIO 6.0 # 1.0
SHARED_LIBS += OpenImageIO_Util 2.0 # 1.5

CATEGORIES = graphics devel
@@ -25,36 +25,41 @@ MAINTAINER = Pascal Stumpf <pascal@stum
PERMIT_PACKAGE = Yes

WANTLIB += ${COMPILER_LIBCXX} ${MODPY_WANTLIB}
+WANTLIB += boost_python${MODPY_MAJORMINOR}-mt
WANTLIB += GL GLEW GLU Half-2_5 Iex-2_5 IlmImf-2_5 IlmThread-2_5
WANTLIB += Imath-2_5 OpenColorIO Qt5Core Qt5Gui Qt5OpenGL Qt5Widgets
WANTLIB += avcodec avformat avutil boost_atomic-mt boost_chrono-mt
-WANTLIB += boost_date_time-mt boost_filesystem-mt boost_python${MODPY_VERSION:C/\.//g}-mt
-WANTLIB += boost_system-mt boost_thread-mt bz2 c freetype gif
-WANTLIB += jpeg m openjpeg png raw_r swscale tiff webp z
+WANTLIB += boost_date_time-mt boost_filesystem-mt boost_system-mt
+WANTLIB += boost_thread-mt bz2 c freetype gif jpeg m openjpeg
+WANTLIB += png pugixml raw_r swscale tiff webp z

MODULES = devel/cmake \
lang/python \
x11/qt5

+MODPY_VERSION = ${MODPY_DEFAULT_VERSION_3}
+
COMPILER = base-clang ports-gcc

BUILD_DEPENDS = textproc/txt2man

LIB_DEPENDS = devel/boost>=1.67.0 \
- graphics/openjpeg \
- graphics/tiff \
- graphics/libwebp \
- graphics/glew \
- graphics/openexr \
+ graphics/ffmpeg \
graphics/giflib \
+ graphics/glew \
+ graphics/libraw \
+ graphics/libwebp \
graphics/opencolorio \
- graphics/ffmpeg \
- graphics/libraw
+ graphics/openexr \
+ graphics/openjpeg \
+ graphics/tiff \
+ textproc/pugixml

-CONFIGURE_ARGS += -DUSE_OPENCV=OFF \
+CONFIGURE_ARGS += -DCMAKE_INSTALL_MANDIR="man/man1" \
+ -DSTOP_ON_WARNING=OFF \
-DUSE_DICOM=OFF \
- -DCMAKE_INSTALL_MANDIR="man/man1" \
- -DSTOP_ON_WARNING=OFF
+ -DUSE_EXTERNAL_PUGIXML=ON \
+ -DUSE_OPENCV=OFF

CXXFLAGS += -pthread

Index: pkg/PLIST
===================================================================
RCS file: /cvs/ports/graphics/openimageio/pkg/PLIST,v
retrieving revision 1.8
diff -u -p -w -u -r1.8 PLIST
--- pkg/PLIST 26 Dec 2017 19:19:04 -0000 1.8
+++ pkg/PLIST 16 Nov 2020 16:34:07 -0000
@@ -38,9 +38,6 @@ include/OpenImageIO/parallel.h
include/OpenImageIO/paramlist.h
include/OpenImageIO/platform.h
include/OpenImageIO/plugin.h
-include/OpenImageIO/pugiconfig.hpp
-include/OpenImageIO/pugixml.cpp
-include/OpenImageIO/pugixml.hpp
include/OpenImageIO/refcnt.h
include/OpenImageIO/simd.h
include/OpenImageIO/strided_ptr.h
@@ -64,6 +61,7 @@ lib/python${MODPY_VERSION}/site-packages
@man man/man1/idiff.1
@man man/man1/igrep.1
@man man/man1/iinfo.1
+@man man/man1/iv.1
@man man/man1/maketx.1
@man man/man1/oiiotool.1
share/doc/OpenImageIO/