cmake: add module version.cmake

cmake/version.cmake

@@ -0,0 +1,100 @@
+cmake_minimum_required(VERSION 3.15)
+
+
+
+function(get_commit_isdirty)
+
+    execute_process(COMMAND
+        "${GIT_EXECUTABLE}" status --short --untracked-files=no
+        WORKING_DIRECTORY "${WORK_DIR}"
+        OUTPUT_VARIABLE COMMIT_ISDIRTY_OUT
+        RESULT_VARIABLE exit_code
+        ERROR_QUIET
+        OUTPUT_STRIP_TRAILING_WHITESPACE
+    )
+
+    if(exit_code EQUAL 0 AND "${COMMIT_ISDIRTY_OUT}" STREQUAL "")
+        set(COMMIT_ISDIRTY 0 PARENT_SCOPE)
+    else()
+        set(COMMIT_ISDIRTY 1 PARENT_SCOPE)
+    endif()
+
+endfunction()
+
+
+
+function(get_commit_hash)
+
+    execute_process(COMMAND
+        "${GIT_EXECUTABLE}" rev-parse --short=12 HEAD
+        WORKING_DIRECTORY "${WORK_DIR}"
+        OUTPUT_VARIABLE COMMIT_HASH_VAR
+        RESULT_VARIABLE exit_code
+        ERROR_QUIET
+        OUTPUT_STRIP_TRAILING_WHITESPACE
+    )
+
+    if(exit_code EQUAL 0)
+        set(COMMIT_HASH ${COMMIT_HASH_VAR} PARENT_SCOPE)
+    else()
+        set(COMMIT_HASH unknown PARENT_SCOPE)
+    endif()
+
+endfunction()
+
+
+
+function(get_patch_version)
+
+
+    if(${DAEMON_PATCH_VERSION} STREQUAL patch)
+
+        execute_process(COMMAND
+            "${GIT_EXECUTABLE}" describe --tags --first-parent --abbrev=0
+            WORKING_DIRECTORY "${WORK_DIR}"
+            OUTPUT_VARIABLE LAST_TAG
+            RESULT_VARIABLE exit_code
+            ERROR_QUIET
+            OUTPUT_STRIP_TRAILING_WHITESPACE
+        )
+
+        execute_process(COMMAND
+            "${GIT_EXECUTABLE}" rev-list HEAD...${LAST_TAG} --count
+            WORKING_DIRECTORY "${WORK_DIR}"
+            OUTPUT_VARIABLE NUMBER_PATCH
+            RESULT_VARIABLE exit_code
+            ERROR_QUIET
+            OUTPUT_STRIP_TRAILING_WHITESPACE
+        )
+
+        if(exit_code EQUAL 0)
+            set(DAEMON_PATCH_VERSION ${NUMBER_PATCH} PARENT_SCOPE)
+        else()
+            set(DAEMON_PATCH_VERSION 0 PARENT_SCOPE)
+        endif()
+    endif()
+
+endfunction()
+
+
+
+find_package(Git QUIET)
+if(Git_FOUND)
+
+    get_commit_isdirty()
+    get_commit_hash()
+    get_patch_version()
+
+else()
+
+    if(${DAEMON_PATCH_VERSION} STREQUAL patch)
+        set(DAEMON_PATCH_VERSION 0)
+    endif()
+
+    set(COMMIT_ISDIRTY       1)
+    set(COMMIT_HASH    unknown)
+
+endif()
+
+
+configure_file(${IN_FILE} ${OUT_FILE} @ONLY)

cmake/version.h.in

@@ -0,0 +1,15 @@
+#ifndef VERSION_HEADER
+#define VERSION_HEADER
+
+
+
+#define DAEMON_MAJOR_VERSION  @DAEMON_MAJOR_VERSION@
+#define DAEMON_MINOR_VERSION  @DAEMON_MINOR_VERSION@
+#define DAEMON_PATCH_VERSION  @DAEMON_PATCH_VERSION@
+
+#define COMMIT_HASH    "@COMMIT_HASH@"
+#define COMMIT_ISDIRTY @COMMIT_ISDIRTY@
+
+
+
+#endif //VERSION_HEADER