From e3235e8fda9307389bb2f9f8ff94ac1f54290a74 Mon Sep 17 00:00:00 2001
From: Eyck Jentzsch <eyck@minres.com>
Date: Wed, 4 Oct 2017 15:56:03 +0200
Subject: [PATCH] Added branch management functions into cmake

---
 CMakeLists.txt           |  8 +++-
 cmake/FindSystemC.cmake  | 91 ----------------------------------------
 cmake/GitFunctions.cmake | 22 ++++++++++
 3 files changed, 28 insertions(+), 93 deletions(-)
 delete mode 100644 cmake/FindSystemC.cmake
 create mode 100644 cmake/GitFunctions.cmake

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5b4cffc..9766c4a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,12 +1,16 @@
 cmake_minimum_required(VERSION 2.8.12)
-set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${CMAKE_CURRENT_SOURCE_DIR}/cmake)
+set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${CMAKE_CURRENT_SOURCE_DIR}/cmake ${CMAKE_CURRENT_SOURCE_DIR}/sc-components/cmake)
+
+include(cmake/GitFunctions.cmake)
+get_branch_from_git()
 
 ### set the directory names of the submodules
+set(GIT_SUBMODULES sc-components)
 set(GIT_SUBMODULE_DIR_sc-components .)
 ### set each submodules's commit or tag that is to be checked out
 ### (leave empty if you want master)
 #set(GIT_SUBMODULE_VERSION_sc-components 3af6b9836589b082c19d9131c5d0b7afa8ddd7cd)
-set(GIT_SUBMODULE_BRANCH_sc-components "develop")
+set(GIT_SUBMODULE_BRANCH_sc-components ${GIT_BRANCH})
 
 include(GNUInstallDirs)
 include(cmake/Submodules.cmake)
diff --git a/cmake/FindSystemC.cmake b/cmake/FindSystemC.cmake
deleted file mode 100644
index 81e1343..0000000
--- a/cmake/FindSystemC.cmake
+++ /dev/null
@@ -1,91 +0,0 @@
-SET(_SYSTEMC_HINTS
-  "[HKEY_LOCAL_MACHINE\\SOFTWARE\\SystemC\\2.2;SystemcHome]/include"
-  ${SYSTEMC_PREFIX}/include
-  ${SYSTEMC_PREFIX}/lib
-  ${SYSTEMC_PREFIX}/lib-linux
-  ${SYSTEMC_PREFIX}/lib-linux64
-  ${SYSTEMC_PREFIX}/lib-macos
-  $ENV{SYSTEMC_PREFIX}/include
-  $ENV{SYSTEMC_PREFIX}/lib
-  $ENV{SYSTEMC_PREFIX}/lib-linux
-  $ENV{SYSTEMC_PREFIX}/lib-linux64
-  $ENV{SYSTEMC_PREFIX}/lib-macos
-  $ENV{SYSTEMC_HOME}/include
-  $ENV{SYSTEMC_HOME}/lib
-  $ENV{SYSTEMC_HOME}/lib-linux
-  $ENV{SYSTEMC_HOME}/lib-linux64
-  $ENV{SYSTEMC_HOME}/lib-macos
-  ${CMAKE_INSTALL_PREFIX}/include
-  ${CMAKE_INSTALL_PREFIX}/lib
-  ${CMAKE_INSTALL_PREFIX}/lib-linux
-  ${CMAKE_INSTALL_PREFIX}/lib-linux64
-  ${CMAKE_INSTALL_PREFIX}/lib-macos
-  )
-SET(_SYSTEMC_PATHS
-  /usr/include/systemc
-  /usr/lib
-  /usr/lib-linux
-  /usr/lib-linux64
-  /usr/lib-macos
-  /usr/local/include/sysc
-  /usr/local/lib
-  /usr/local/lib-linux
-  /usr/local/lib-linux64
-  /usr/local/lib-macos
-  )
-FIND_FILE(_SYSTEMC_HEADER_FILE
-  NAMES systemc
-  HINTS ${_SYSTEMC_HINTS}
-  PATHS ${_SYSTEMC_PATHS}
-  PATH_SUFFIXES sysc/kernel
-)
-
-FIND_FILE(_SCV_HEADER_FILE
-  NAMES scv.h
-  HINTS ${_SYSTEMC_HINTS}
-  PATHS ${_SYSTEMC_PATHS}
-  PATH_SUFFIXES sysc/kernel
-)
-
-if(NOT _SYSTEMC_HEADER_FILE STREQUAL _SYSTEMC_HEADER_FILE-NOTFOUND)
-  set(SystemC_FOUND TRUE)
-endif(NOT _SYSTEMC_HEADER_FILE STREQUAL _SYSTEMC_HEADER_FILE-NOTFOUND)
-
-if(NOT _SCV_HEADER_FILE STREQUAL _SCV_HEADER_FILE-NOTFOUND)
-  set(SCV_FOUND TRUE)
-endif(NOT _SCV_HEADER_FILE STREQUAL _SCV_HEADER_FILE-NOTFOUND)
-
-FIND_PATH(SystemC_INCLUDE_DIRS
-  NAMES systemc.h
-  HINTS ${_SYSTEMC_HINTS}
-  PATHS ${_SYSTEMC_PATHS}
-)
-
-FIND_PATH(SystemC_LIBRARY_DIRS
-  NAMES libsystemc.a
-  HINTS ${_SYSTEMC_HINTS}
-  PATHS ${_SYSTEMC_PATHS}
-)
-
-FIND_PATH(SCV_INCLUDE_DIRS
-  NAMES scv.h
-  HINTS ${_SYSTEMC_HINTS}
-  PATHS ${_SYSTEMC_PATHS}
-)
-
-FIND_PATH(SCV_LIBRARY_DIRS
-  NAMES libscv.a
-  HINTS ${_SYSTEMC_HINTS}
-  PATHS ${_SYSTEMC_PATHS}
-)
-
-if(SystemC_FOUND)
-        set(SystemC_LIBRARIES systemc)
-        message(STATUS "SystemC header files are taken from ${SystemC_INCLUDE_DIRS}")
-        message(STATUS "SystemC library is taken from ${SystemC_LIBRARY_DIRS}")
-        if(SCV_FOUND)
-            set(SCV_LIBRARIES scv)
-            message(STATUS "SCV header files are taken from ${SCV_INCLUDE_DIRS}")
-            message(STATUS "SCV library is taken from ${SCV_LIBRARY_DIRS}")
-        endif(SCV_FOUND)
-endif(SystemC_FOUND)
diff --git a/cmake/GitFunctions.cmake b/cmake/GitFunctions.cmake
new file mode 100644
index 0000000..bbb4903
--- /dev/null
+++ b/cmake/GitFunctions.cmake
@@ -0,0 +1,22 @@
+if(__git_functions)
+    return()
+endif()
+set(__git_functions YES)
+
+function( get_branch_from_git )
+    execute_process(
+        COMMAND git rev-parse --abbrev-ref HEAD
+        WORKING_DIRECTORY   ${PROJECT_SOURCE_DIR}
+        RESULT_VARIABLE   git_result
+        OUTPUT_VARIABLE   git_branch
+        ERROR_VARIABLE    git_error
+        OUTPUT_STRIP_TRAILING_WHITESPACE
+        ERROR_STRIP_TRAILING_WHITESPACE
+    )
+    if( NOT git_result EQUAL 0 )
+        message( FATAL_ERROR "Failed to execute Git: ${git_error}" )
+    endif()
+    
+    set( GIT_BRANCH ${git_branch} PARENT_SCOPE )
+endfunction( get_branch_from_git )
+