Python: get version from CMake and export it as __version__

CMakeLists.txt

@@ -17,6 +17,22 @@ set(CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/cmake)
 
 include(VersionSource)
 find_package(GEOS REQUIRED)
+if (GEOS_VERSION_MAJOR LESS 3 OR GEOS_VERSION_MINOR LESS 5)
+   message(FATAL_ERROR "GEOS version 3.5 or later is required.")
+endif()
+
+message(STATUS "Source version: " ${EXACTEXTRACT_VERSION_SOURCE})
+set(SRC_GENERATED ${CMAKE_CURRENT_BINARY_DIR}/generated)
+configure_file(src/version.h.in ${SRC_GENERATED}/version.h)
+
+# Define coverage build type
+set(CMAKE_CXX_FLAGS_COVERAGE "-fprofile-arcs -ftest-coverage")
+
+# Make sure we know our build type
+if(NOT CMAKE_BUILD_TYPE)
+    message(STATUS "Setting build type to '${DEFAULT_BUILD_TYPE}' as none was specified")
+    set(CMAKE_BUILD_TYPE "${DEFAULT_BUILD_TYPE}")
+endif()
 
 #Configure some options the various components this module can build
 option(BUILD_CLI "Build the exactextract cli binary" ON) #requires gdal, cli11
@@ -85,7 +101,7 @@ if(BUILD_CLI)
         subdivide
         PRIVATE
         ${GDAL_INCLUDE_DIR}
-        ${CMAKE_BINARY_DIR}/generated
+        ${SRC_GENERATED}
         )
 
     target_link_libraries(
@@ -98,7 +114,7 @@ if(BUILD_CLI)
     target_include_directories(
             ${BIN_NAME}
             PRIVATE
-            ${CMAKE_BINARY_DIR}/generated
+            ${SRC_GENERATED}
             ${CMAKE_SOURCE_DIR}/src
     )
 
@@ -178,21 +194,6 @@ if(BUILD_TEST)
 
 endif() #BUILD_TEST
 
-message(STATUS "Source version: " ${EXACTEXTRACT_VERSION_SOURCE})
-configure_file(src/version.h.in ${CMAKE_CURRENT_BINARY_DIR}/generated/version.h)
-
-if (GEOS_VERSION_MAJOR LESS 3 OR GEOS_VERSION_MINOR LESS 5)
-   message(FATAL_ERROR "GEOS version 3.5 or later is required.")
-endif()
-
-# Define coverage build type
-set(CMAKE_CXX_FLAGS_COVERAGE "-fprofile-arcs -ftest-coverage")
-
-# Make sure we know our build type
-if(NOT CMAKE_BUILD_TYPE)
-    message(STATUS "Setting build type to '${DEFAULT_BUILD_TYPE}' as none was specified")
-    set(CMAKE_BUILD_TYPE "${DEFAULT_BUILD_TYPE}")
-endif()
 
 set(PROJECT_SOURCES
         src/measures.cpp
@@ -249,7 +250,7 @@ set(PROJECT_SOURCES
         src/weighted_quantiles.h
         src/weighted_quantiles.cpp
         src/variance.h
-        ${CMAKE_CURRENT_BINARY_DIR}/generated/version.h
+        ${SRC_GENERATED}/version.h
         )
 
 add_library(${LIB_NAME} ${PROJECT_SOURCES})

cmake/VersionSource.cmake

@@ -33,5 +33,7 @@ if(EXISTS ${CMAKE_SOURCE_DIR}/.git/HEAD)
   endif()
 endif()
 
+message("exactextract version: ${EXACTEXTRACT_VERSION_SOURCE}")
+
 unset(dirty)
 unset(head)

python/CMakeLists.txt

@@ -22,14 +22,16 @@ src/pybindings/processor_bindings.h
 src/pybindings/raster_source_bindings.cpp
 src/pybindings/raster_source_bindings.h
 src/pybindings/writer_bindings.cpp
-src/pybindings/writer_bindings.h)
+src/pybindings/writer_bindings.h
+)
 
 pybind11_add_module(_exactextract MODULE ${PYBIND_SOURCES})
 target_include_directories(_exactextract PRIVATE
     ${CMAKE_SOURCE_DIR}/src
+    ${SRC_GENERATED}
     ${GEOS_INCLUDE_DIR})
-    set_property(TARGET ${LIB_NAME} PROPERTY POSITION_INDEPENDENT_CODE ON)
-    target_link_libraries(_exactextract PRIVATE ${LIB_NAME} ${GEOS_LIBRARY})
+set_property(TARGET ${LIB_NAME} PROPERTY POSITION_INDEPENDENT_CODE ON)
+target_link_libraries(_exactextract PRIVATE ${LIB_NAME} ${GEOS_LIBRARY})
 
 add_test(NAME "pybindings" 
          COMMAND ${CMAKE_COMMAND} -E env

python/project.ini

@@ -6,5 +6,4 @@ url = https://github.com/isciences/exactextract
 title = exactextract Documentation
 description = Fast and accurate raster zonal statistics
 long_description = exactextract provides a fast and accurate algorithm for summarizing values in the portion of a raster dataset that is covered by a polygon, often referred to as zonal statistics. Unlike other zonal statistics implementations, it takes into account raster cells that are partially covered by the polygon.
-version = 0.2.0
 tag = 

python/setup.py

@@ -79,6 +79,15 @@ def move_output(self, ext):
         self.copy_file(str(source_path), str(dest_path))
 
 
+def find_version():
+    version_script = os.path.abspath(
+            os.path.join(os.path.dirname(__file__), os.pardir, 'cmake', 'VersionSource.cmake'))
+    version = subprocess.run(['cmake', '-P', version_script],
+        capture_output=True,
+        text=True).stderr.split(':')[1].strip()
+    print(f"Version: {version}")
+    return version
+
 # The information here can also be placed in setup.cfg - better separation of
 # logic and declaration, and simpler if you include description/version in a file.
 
@@ -92,8 +101,8 @@ def move_output(self, ext):
 url = config['base']['url']
 title = config['base']['title']
 description = config['base']['description']
-version = config['base']['version']
 tag = config['base']['tag']
+version = find_version()
 
 setup(
     name=project,

python/src/exactextract/__init__.py

@@ -1,6 +1,7 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 """ Python bindings for exactextract """
+from _exactextract import __version__
 
 from .exact_extract import exact_extract
 from .feature import Feature, GDALFeature, JSONFeature

python/src/pybindings/bindings.cpp

@@ -18,13 +18,16 @@
 #include "operation_bindings.h"
 #include "processor_bindings.h"
 #include "raster_source_bindings.h"
+#include "version.h"
 #include "writer_bindings.h"
 
 namespace py = pybind11;
 
 namespace exactextract {
 PYBIND11_MODULE(_exactextract, m)
 {
+    m.attr("__version__") = version();
+
     bind_feature(m);
     bind_feature_source(m);
     bind_raster_source(m);

python/tests/test_version.py

@@ -0,0 +1,6 @@
+import exactextract
+import re
+
+def test_version():
+
+    assert re.match('[0-9]+[.][0-9]+[.][0-9]+', exactextract.__version__)