Debian/oldstable docker container for packaging (#942)

This adds dockerized build stances to .gitlab-ci.yml. They will run only in scheduled builds (i.e. once per day at night) or upon special request (through secret GUI button). They shall ensure that at any time we are ready to generate binary installers.

This resolves #942 (closed).

cmake/multipython/MakePythonWheel.cmake

@@ -57,7 +57,24 @@ configure_file(${CMAKE_SOURCE_DIR}/CITATION ${PY_OUTPUT_DIR} COPYONLY)
 # dummy C extension for the Python package
 # NOTE: Dummy C extension is used merely to set the correct wheel tag according to PEP 425
 
-configure_file("${WHEEL_ROOT_DIR}/src/bornagain_c_ext_dummy.c" ${BA_PY_SOURCE_OUTPUT_DIR} COPYONLY)
+# determine the full wheel-name
+execute_process(
+    COMMAND ${Python3_EXECUTABLE} ${CMAKE_SOURCE_DIR}/cmake/multipython/wheelname.py
+    ${CMAKE_PROJECT_NAME} ${CMAKE_PROJECT_VERSION}
+    OUTPUT_VARIABLE _BA_WHEEL_NAMES
+    OUTPUT_STRIP_TRAILING_WHITESPACE
+)
+
+# name for a pure-Python wheel, eg. 'BA-3.2.1-py3-none-any'
+list(GET _BA_WHEEL_NAMES 0 BA_PURE_WHEEL_NAME)
+set(BA_PY_PURE_WHEEL_NAME "${BA_PURE_WHEEL_NAME}.whl")
+
+# name for a platform-dependent Python wheel; eg., 'BA-3.2.1-cp311-cp311-linux_x86_64'
+list(GET _BA_WHEEL_NAMES 1 BA_WHEEL_NAME)
+set(BA_PY_WHEEL_NAME "${BA_WHEEL_NAME}.whl")
+
+message(STATUS "Python pure wheel-name: '${BA_PURE_WHEEL_NAME}'")
+message(STATUS "Python platform-dependent wheel-name: '${BA_WHEEL_NAME}'")
 
 # store init files for the Python package
 
@@ -100,7 +117,7 @@ if(APPLE)
 
     add_custom_target(BAPyWheel ALL
         COMMENT "${header} Script to build the Python wheel: "
-        "'${${BUILD_VAR_DIR}/mk_pypack_macos.zsh}'"
+        "'${BUILD_VAR_DIR}/mac_py_package.py'"
         )
 elseif(LINUX)
     # On Linux, building the Python packages needs further effort
@@ -110,12 +127,14 @@ elseif(LINUX)
         ${BUILD_VAR_DIR}/mk_wheel_multilinux.sh @ONLY)
     add_custom_target(BAPyWheel ALL
         COMMENT "${header} Script to build the Python wheel: "
-        "'${${BUILD_VAR_DIR}/mk_wheel_multilinux.sh}'"
+        "'${BUILD_VAR_DIR}/mk_wheel_multilinux.sh'"
         )
 else()
     # MS-Windows
     add_custom_target(BAPyWheel ALL
-        COMMAND ${Python3_EXECUTABLE} -m pip wheel ${PY_OUTPUT_DIR} --no-deps --wheel ${WHEEL_DIR}
+        COMMAND ${Python3_EXECUTABLE} -m pip -v wheel ${PY_OUTPUT_DIR} --no-deps --wheel ${WHEEL_DIR}
+        COMMAND ${CMAKE_COMMAND} -E rename "${WHEEL_DIR}/${BA_PY_PURE_WHEEL_NAME}"
+        "${WHEEL_DIR}/${BA_PY_WHEEL_NAME}"
         COMMENT "${header} Making the Python wheel..."
         )
 endif()