portal64-still-alive/cmake/gen_version_header.cmake
Matt Penny bc2052527c Generate game version for CMake builds and fix generated level names
With CMake, the game version is stored in a generated header file so
dependencies on it are kept track of automatically.

The game now compiles when using CMake but does not link.

Generated code dependencies are not hooked up yet and corresponding
targets need to be built manually.
2024-09-25 22:24:16 -04:00

44 lines
1.1 KiB
CMake

#################################
## Get current project version ##
#################################
# First try getting the version from git
execute_process(
COMMAND
${GIT} describe --tags HEAD
RESULT_VARIABLE
GIT_DESCRIBE_RC
OUTPUT_VARIABLE
GIT_DESCRIBE_OUTPUT
)
# If not in a git repo, fall back to exported version
if (NOT GIT_DESCRIBE_RC EQUAL 0)
file(READ version.txt GIT_DESCRIBE_OUTPUT)
endif()
# Extract the version
string(STRIP "${GIT_DESCRIBE_OUTPUT}" GIT_DESCRIBE_OUTPUT)
string(REPLACE "-" ";" GIT_DESCRIBE_COMPONENTS "${GIT_DESCRIBE_OUTPUT}")
list(LENGTH GIT_DESCRIBE_COMPONENTS COMPONENT_COUNT)
if (COMPONENT_COUNT GREATER_EQUAL 3)
# Not on a git tag, use commit hash (trim the "g" prefix)
list(GET GIT_DESCRIBE_COMPONENTS 2 GAME_VERSION)
string(SUBSTRING "${GAME_VERSION}" 1 -1 GAME_VERSION)
else()
# On a git tag, use it
list(GET GIT_DESCRIBE_COMPONENTS 0 GAME_VERSION)
endif()
file(CONFIGURE
OUTPUT ${OUTPUT_FILE}
CONTENT
"#ifndef __GAME_VERSION_H__
#define __GAME_VERSION_H__
#define GAME_VERSION \"${GAME_VERSION}\"
#endif"
)