1 files changed, 78 insertions, 0 deletions
diff --git a/sources/cmake_helpers/helpers.cmake b/sources/cmake_helpers/helpers.cmake
new file mode 100644
index 000000000..e64b8d9d3
--- /dev/null
+++ b/sources/cmake_helpers/helpers.cmake
@@ -0,0 +1,78 @@
+macro(compute_config_py_values
+      full_version_var_name
+        )
+    string(TIMESTAMP PACKAGE_BUILD_DATE "%Y-%m-%dT%H:%M:%S+00:00" UTC)
+    if (PACKAGE_BUILD_DATE)
+        set(PACKAGE_BUILD_DATE "__build_date__ = '${PACKAGE_BUILD_DATE}'")
+    endif()
+
+    if (PACKAGE_SETUP_PY_PACKAGE_VERSION)
+        set(PACKAGE_SETUP_PY_PACKAGE_VERSION_ASSIGNMENT "__setup_py_package_version__ = '${PACKAGE_SETUP_PY_PACKAGE_VERSION}'")
+        set(FINAL_PACKAGE_VERSION ${PACKAGE_SETUP_PY_PACKAGE_VERSION})
+    else()
+        set(FINAL_PACKAGE_VERSION ${${full_version_var_name}})
+    endif()
+
+    if (PACKAGE_SETUP_PY_PACKAGE_TIMESTAMP)
+        set(PACKAGE_SETUP_PY_PACKAGE_TIMESTAMP_ASSIGNMENT "__setup_py_package_timestamp__ = '${PACKAGE_SETUP_PY_PACKAGE_TIMESTAMP}'")
+    else()
+        set(PACKAGE_SETUP_PY_PACKAGE_TIMESTAMP_ASSIGNMENT "")
+    endif()
+
+    find_package(Git)
+    if(GIT_FOUND)
+        # Check if current source folder is inside a git repo, so that commit information can be
+        # queried.
+        execute_process(
+          COMMAND ${GIT_EXECUTABLE} rev-parse --git-dir
+          OUTPUT_VARIABLE PACKAGE_SOURCE_IS_INSIDE_REPO
+          ERROR_QUIET
+          OUTPUT_STRIP_TRAILING_WHITESPACE)
+
+        if(PACKAGE_SOURCE_IS_INSIDE_REPO)
+            # Force git dates to be UTC-based.
+            set(ENV{TZ} UTC)
+            execute_process(
+              COMMAND ${GIT_EXECUTABLE} --no-pager show --date=format-local:%Y-%m-%dT%H:%M:%S+00:00 -s --format=%cd HEAD
+              OUTPUT_VARIABLE PACKAGE_BUILD_COMMIT_DATE
+              OUTPUT_STRIP_TRAILING_WHITESPACE)
+            if(PACKAGE_BUILD_COMMIT_DATE)
+                set(PACKAGE_BUILD_COMMIT_DATE "__build_commit_date__ = '${PACKAGE_BUILD_COMMIT_DATE}'")
+            endif()
+            unset(ENV{TZ})
+
+            execute_process(
+              COMMAND ${GIT_EXECUTABLE} rev-parse HEAD
+              OUTPUT_VARIABLE PACKAGE_BUILD_COMMIT_HASH
+              OUTPUT_STRIP_TRAILING_WHITESPACE)
+            if(PACKAGE_BUILD_COMMIT_HASH)
+                set(PACKAGE_BUILD_COMMIT_HASH "__build_commit_hash__ = '${PACKAGE_BUILD_COMMIT_HASH}'")
+            endif()
+
+            execute_process(
+              COMMAND ${GIT_EXECUTABLE} describe HEAD
+              OUTPUT_VARIABLE PACKAGE_BUILD_COMMIT_HASH_DESCRIBED
+              OUTPUT_STRIP_TRAILING_WHITESPACE)
+            if(PACKAGE_BUILD_COMMIT_HASH_DESCRIBED)
+                set(PACKAGE_BUILD_COMMIT_HASH_DESCRIBED "__build_commit_hash_described__ = '${PACKAGE_BUILD_COMMIT_HASH_DESCRIBED}'")
+            endif()
+
+        endif()
+    endif()
+
+endmacro()
+
+# Creates a new target called "${library_name}_generator" which
+# depends on the mjb_rejected_classes.log file generated by shiboken.
+# This target is added as a dependency to ${library_name} target.
+# This file's timestamp informs cmake when the last generation was
+# done, without force-updating the timestamps of the generated class
+# cpp files.
+# In practical terms this means that changing some injection code in
+# an xml file that modifies only one specific class cpp file, will
+# not force rebuilding all the cpp files, and thus allow for better
+# incremental builds.
+macro(create_generator_target library_name)
+    add_custom_target(${library_name}_generator DEPENDS "${CMAKE_CURRENT_BINARY_DIR}/mjb_rejected_classes.log")
+    add_dependencies(${library_name} ${library_name}_generator)
+endmacro()