create version.py on the fly

This allows us to specify the actual versions used for building.

Author: lonvia

CMakeLists.txt

@@ -98,5 +98,7 @@ pybind11_add_module(filter
 install(TARGETS filter DESTINATION osmium)
 target_link_libraries(filter PRIVATE ${OSMIUM_LIBRARIES})
 
+configure_file(cmake/version.py.tmpl version.py)
+install(FILES ${PROJECT_BINARY_DIR}/version.py DESTINATION osmium)
 
 endif()

cmake/FindOsmium.cmake

@@ -281,6 +281,7 @@ find_package_handle_standard_args(Osmium
                                   REQUIRED_VARS OSMIUM_INCLUDE_DIR ${OSMIUM_EXTRA_FIND_VARS}
                                   VERSION_VAR _libosmium_version)
 unset(OSMIUM_EXTRA_FIND_VARS)
+set(OSMIUM_VERSION ${_libosmium_version})
 
 #----------------------------------------------------------------------
 #

cmake/FindProtozero.cmake

@@ -58,6 +58,6 @@ include(FindPackageHandleStandardArgs)
 find_package_handle_standard_args(Protozero
                                   REQUIRED_VARS PROTOZERO_INCLUDE_DIR
                                   VERSION_VAR _version)
-
+SET(PROTOZERO_VERSION ${_version})
 
 #----------------------------------------------------------------------

cmake/version.py.tmpl

@@ -0,0 +1,19 @@
+# SPDX-License-Identifier: BSD-2-Clause
+#
+# This file is part of pyosmium. (https://osmcode.org/pyosmium/)
+#
+# Copyright (C) 2025 Sarah Hoffmann <[email protected]> and others.
+# For a full list of authors see the git log.
+"""
+Version information.
+"""
+
+# current release (Pip version)
+pyosmium_release = '@SKBUILD_PROJECT_VERSION@'
+
+# libosmium version used to compile this package
+libosmium_version = '@OSMIUM_VERSION@'
+# protozero version used to compile this package
+protozero_version = '@PROTOZERO_VERSION@'
+# pybind11 version shipped used to compile this package
+pybind11_version = '@pybind11_VERSION@'