From e3fbcfc085411475cb07da84308f03dbd3405e5e Mon Sep 17 00:00:00 2001
From: Aki <please@ignore.pl>
Date: Sat, 28 Jan 2023 16:54:36 +0100
Subject: Commits will now trigger version-files regeneration during build

---
 CMakeLists.txt                            |  6 +++---
 cmake/modules/AddVersionFile.cmake        | 15 +++++++++++++++
 cmake/modules/GitRevParse.cmake           | 14 --------------
 cmake/modules/generate_version_file.cmake | 12 ++++++++++++
 kurator/CMakeLists.txt                    |  2 +-
 kurator/src/version.cpp.conf              |  2 +-
 version.txt.conf                          |  2 +-
 7 files changed, 33 insertions(+), 20 deletions(-)
 create mode 100644 cmake/modules/AddVersionFile.cmake
 delete mode 100644 cmake/modules/GitRevParse.cmake
 create mode 100644 cmake/modules/generate_version_file.cmake

diff --git a/CMakeLists.txt b/CMakeLists.txt
index fe35ab7..79eae9f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -8,12 +8,12 @@ find_package(EnTT 3 REQUIRED)
 find_package(nlohmann_json 3 REQUIRED)
 find_package(raylib 4 REQUIRED)
 include(AddResources)
-include(GitRevParse)
-git_rev_parse(KURATOR_VERSION)
+include(AddVersionFile)
 add_subdirectory(campaign)
 add_subdirectory(contrib)
 add_subdirectory(kurator)
 add_subdirectory(sim)
 add_subdirectory(stats)
 add_subdirectory(universe)
-configure_file(version.txt.conf "${CMAKE_CURRENT_BINARY_DIR}/version.txt" @ONLY)
+add_version_file(version.txt version.txt.conf)
+add_custom_target(version ALL DEPENDS "${CMAKE_CURRENT_BINARY_DIR}/version.txt")
diff --git a/cmake/modules/AddVersionFile.cmake b/cmake/modules/AddVersionFile.cmake
new file mode 100644
index 0000000..1cce0b9
--- /dev/null
+++ b/cmake/modules/AddVersionFile.cmake
@@ -0,0 +1,15 @@
+set(ADD_VERSION_FILE_DIR "${CMAKE_CURRENT_LIST_DIR}")
+
+function(add_version_file OUTPUT TEMPLATE)
+	add_custom_target(
+		${OUTPUT}
+		BYPRODUCTS "${CMAKE_CURRENT_BINARY_DIR}/${OUTPUT}"
+		DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/${TEMPLATE}"
+		WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
+		COMMAND
+			cmake
+			-DOUTPUT='${CMAKE_CURRENT_BINARY_DIR}/${OUTPUT}'
+			-DTEMPLATE='${CMAKE_CURRENT_SOURCE_DIR}/${TEMPLATE}'
+			-P "${ADD_VERSION_FILE_DIR}/generate_version_file.cmake"
+	)
+endfunction()
diff --git a/cmake/modules/GitRevParse.cmake b/cmake/modules/GitRevParse.cmake
deleted file mode 100644
index 9005d65..0000000
--- a/cmake/modules/GitRevParse.cmake
+++ /dev/null
@@ -1,14 +0,0 @@
-function(git_rev_parse VAR)
-	execute_process(
-		COMMAND git rev-parse --short HEAD
-		WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
-		RESULT_VARIABLE PARSE_RESULT
-		OUTPUT_VARIABLE PARSE_OUTPUT
-		OUTPUT_STRIP_TRAILING_WHITESPACE
-	)
-	if(NOT PARSE_RESULT)
-		set(${VAR} ${PARSE_OUTPUT} PARENT_SCOPE)
-	else()
-		set(${VAR} "Unknown" PARENT_SCOPE)
-	endif()
-endfunction()
diff --git a/cmake/modules/generate_version_file.cmake b/cmake/modules/generate_version_file.cmake
new file mode 100644
index 0000000..4479855
--- /dev/null
+++ b/cmake/modules/generate_version_file.cmake
@@ -0,0 +1,12 @@
+execute_process(
+	COMMAND git rev-parse --short HEAD
+	RESULT_VARIABLE PARSE_RESULT
+	OUTPUT_VARIABLE PARSE_OUTPUT
+	OUTPUT_STRIP_TRAILING_WHITESPACE
+)
+if(NOT PARSE_RESULT)
+	set(HASH "${PARSE_OUTPUT}")
+else()
+	set(HASH "NOTFOUND")
+endif()
+configure_file("${TEMPLATE}" "${OUTPUT}" @ONLY)
diff --git a/kurator/CMakeLists.txt b/kurator/CMakeLists.txt
index 7add534..e2e4821 100644
--- a/kurator/CMakeLists.txt
+++ b/kurator/CMakeLists.txt
@@ -27,7 +27,7 @@ target_link_libraries(
 	PRIVATE stats
 	PRIVATE universe
 )
-configure_file(src/version.cpp.conf "${CMAKE_CURRENT_BINARY_DIR}/version.cpp" @ONLY)
+add_version_file(version.cpp src/version.cpp.conf)
 target_sources(
 	${PROJECT_NAME}
 	PRIVATE "${CMAKE_CURRENT_BINARY_DIR}/version.cpp"
diff --git a/kurator/src/version.cpp.conf b/kurator/src/version.cpp.conf
index a6d0aa0..a389f23 100644
--- a/kurator/src/version.cpp.conf
+++ b/kurator/src/version.cpp.conf
@@ -2,7 +2,7 @@ namespace kurator
 {
 
 
-const char* VERSION {"@KURATOR_VERSION@"};
+const char* VERSION {"@HASH@"};
 
 
 }  // namespace kurator
diff --git a/version.txt.conf b/version.txt.conf
index 926d433..cc0fa45 100644
--- a/version.txt.conf
+++ b/version.txt.conf
@@ -1 +1 @@
-@KURATOR_VERSION@
+@HASH@
-- 
cgit v1.1