From a50f6505f4989b1d96449ba7cd498f8bf2880427 Mon Sep 17 00:00:00 2001
From: bergmann <info@bergmann89.de>
Date: Thu, 11 Jul 2019 00:22:06 +0200
Subject: [PATCH] * Improved FindLocalModele and Git Helper

---
 find_local_module.cmake | 21 +++++++------
 git_helper.cmake        | 66 +++++++++++++++++++++++++++++++++++++++++
 2 files changed, 78 insertions(+), 9 deletions(-)
 create mode 100644 git_helper.cmake

diff --git a/find_local_module.cmake b/find_local_module.cmake
index 9559f64..5e66064 100644
--- a/find_local_module.cmake
+++ b/find_local_module.cmake
@@ -1,10 +1,13 @@
-Function ( FindLocalModule MODULE_NAME MODULE_PATH )
-
-    Get_Property ( IS_INCLUDED GLOBAL PROPERTY __find_local_module_${MODULE_NAME} )
-    If ( NOT IS_INCLUDED )
-        Add_Subdirectory ( ${MODULE_PATH}/
-                           ${CMAKE_BINARY_DIR}/subprojects/${MODULE_NAME}/ )
-        Set_Property ( GLOBAL PROPERTY __find_local_module_${MODULE_NAME} TRUE )
+Include ( FindPackageHandleStandardArgs )
+Macro ( FindLocalModule MODULE_NAME MODULE_PATH )
+    If ( EXISTS ${MODULE_PATH} )
+        Get_Property ( IS_INCLUDED GLOBAL PROPERTY __find_local_module_${MODULE_NAME} )
+        If ( NOT IS_INCLUDED )
+            Add_Subdirectory ( ${MODULE_PATH}/
+                            ${CMAKE_BINARY_DIR}/subprojects/${MODULE_NAME}/ )
+            Set_Property ( GLOBAL PROPERTY __find_local_module_${MODULE_NAME} TRUE )
+        EndIf ( )
+        Find_Package_Handle_Standard_Args ( ${MODULE_NAME}
+                                            DEFAULT_MSG )
     EndIf ( )
-
-EndFunction ( )
+EndMacro ( )
diff --git a/git_helper.cmake b/git_helper.cmake
new file mode 100644
index 0000000..ebee675
--- /dev/null
+++ b/git_helper.cmake
@@ -0,0 +1,66 @@
+Function ( GitGetVersion GIT_ROOT OUT_MAJOR OUT_MINOR OUT_PATCH OUT_BUILD OUT_HASH )
+
+    If ( NOT EXISTS "${GIT_ROOT}/.git" )
+        Return ( )
+    EndIf ( )
+
+    Message ( "" )
+
+    # Execute process to get git revisions
+    Execute_Process ( COMMAND
+                        bash -c "git -C ${GIT_ROOT} show-ref --tags | egrep 'refs\/tags\/v?[0-9]+\.[0-9]+(\.[0-9]+(\.[0-9]+))' | head -1"
+                      RESULT_VARIABLE
+                        GIT_RET
+                      OUTPUT_VARIABLE
+                        GIT_REV
+                      ERROR_VARIABLE
+                        GIT_ERR )
+    If ( NOT ${GIT_RET} EQUAL 0 )
+        Message ( FATAL_ERROR "Unable to get git revisions! ${GIT_RET}" )
+    EndIf ( )
+    If ( "${GIT_REV}" STREQUAL "" )
+        Return ()
+    EndIf ()
+
+    # Split the git revision string
+    String ( REPLACE " " ";" SPLIT ${GIT_REV} )
+    List ( LENGTH SPLIT COUNT )
+    If ( NOT ${COUNT} EQUAL 2 )
+        Return ( )
+    EndIf ( )
+    List ( GET SPLIT 0 HASH )
+    List ( GET SPLIT 1 VERSION )
+
+    # Split the version
+    String ( STRIP "${VERSION}" SPLIT )
+    String ( REGEX REPLACE "refs?\/tags?\/v?" "" SPLIT ${SPLIT} )
+    String ( REPLACE "." ";" SPLIT ${SPLIT} )
+    List ( LENGTH SPLIT COUNT )
+    If ( ${COUNT} LESS 2 )
+        Message ( FATAL_ERROR "Unable to parse version string!" )
+    EndIf ( )
+
+    # major
+    List ( GET SPLIT 0 TMP )
+    Set ( ${OUT_MAJOR} ${TMP} PARENT_SCOPE )
+
+    # minor
+    List ( GET SPLIT 1 TMP )
+    Set ( ${OUT_MINOR} ${TMP} PARENT_SCOPE )
+
+    # patch
+    If ( ${COUNT} GREATER 2 )
+        List ( GET SPLIT 2 TMP )
+        Set ( ${OUT_PATCH} ${TMP} PARENT_SCOPE )
+    EndIf ( )
+
+    # build
+    If ( ${COUNT} GREATER 3 )
+        List ( GET SPLIT 3 TMP )
+        Set ( ${OUT_BUILD} ${TMP} PARENT_SCOPE )
+    EndIf ( )
+
+    # hash
+    Set ( ${OUT_HASH} ${HASH} PARENT_SCOPE )
+
+EndFunction ( )