Add postinst. script for macOS to open the readme automatically after installation.

CMakeLists.txt

@@ -846,6 +846,11 @@ ELSE(WIN32 AND NOT UNIX)
 		    file(APPEND ${PROJECT_BINARY_DIR}/postinstall "${POSTINST2_LINES}")
 		    file(REMOVE ${PROJECT_BINARY_DIR}/postinstall2)
 		endif()
+		# postscript to auto open readme
+		configure_file(${PROJECT_SOURCE_DIR}/misc/binpkg_postinst_scripts/macosx/postinst_open_readme.sh ${PROJECT_BINARY_DIR}/postinstall2 @ONLY)
+		file(READ ${PROJECT_BINARY_DIR}/postinstall2 POSTINST2_LINES)
+		file(APPEND ${PROJECT_BINARY_DIR}/postinstall "${POSTINST2_LINES}")
+		file(REMOVE ${PROJECT_BINARY_DIR}/postinstall2)
 	ELSE(APPLE)
 		SET(CPACK_GENERATOR "DEB;RPM")
 		#SET(CPACK_DEBIAN_PACKAGE_DEPENDS "python, python-numpy, libfftw3-3, libsndfile1")

misc/binpkg_postinst_scripts/macosx/postinst_open_readme.sh

+#!/bin/bash
+
+[[ -r "@CMAKE_INSTALL_PREFIX@/doc/html/README.html" ]] && open @CMAKE_INSTALL_PREFIX@/doc/html/README.html