Merge pull request #179 from robertodr/master

Use only Git commands in `git_info`

modules/git_info/git_info.cmake

@@ -9,20 +9,72 @@
 #
 #   url_root: https://github.com/coderefinery/autocmake/raw/master/
 #   fetch:
-#     - "%(url_root)modules/git_info/git_info_sub.cmake"
 #     - "%(url_root)modules/git_info/git_info.h.in"
 
-# CMAKE_CURRENT_LIST_DIR is undefined in CMake 2.8.2
-# see https://public.kitware.com/Bug/print_bug_page.php?bug_id=11675
-# workaround: create CMAKE_CURRENT_LIST_DIR 
-get_filename_component(CMAKE_CURRENT_LIST_DIR ${CMAKE_CURRENT_LIST_FILE} PATH)
-add_custom_command(
-    OUTPUT ${PROJECT_BINARY_DIR}/git_info.h
-    COMMAND ${CMAKE_COMMAND} -D_target_dir=${PROJECT_BINARY_DIR} -P git_info_sub.cmake
-    WORKING_DIRECTORY ${CMAKE_CURRENT_LIST_DIR}
+get_filename_component(_current_dir ${CMAKE_CURRENT_LIST_FILE} PATH)
+
+function(generate_git_info_header)
+  # _header_location: where the Git info header file should be generated
+  # _header_name: the Git info header name, complete with extension (.h, .hpp, .hxx or whatever)
+  if(${ARGC} EQUAL 2)
+    set(_header_location ${ARGV0})
+    set(_header_name     ${ARGV1})
+  elseif(${ARGC} EQUAL 0)
+    set(_header_location ${PROJECT_BINARY_DIR})
+    set(_header_name git_info.h)
+  else()
+    message(FATAL_ERROR "generate_git_info_header function accepts either two or no arguments")
+  endif()
+  find_package(Git)
+
+  set(_git_last_commit_hash "unknown")
+  set(_git_last_commit_author "unknown")
+  set(_git_last_commit_date "unknown")
+  set(_git_branch "unknown")
+
+  if(GIT_FOUND)
+    execute_process(
+      COMMAND ${GIT_EXECUTABLE} --no-pager show -s --pretty=format:%h -n 1
+      OUTPUT_VARIABLE _git_last_commit_hash
+      OUTPUT_STRIP_TRAILING_WHITESPACE
+      ERROR_QUIET
+      )
+
+    execute_process(
+      COMMAND ${GIT_EXECUTABLE} --no-pager show -s --pretty=format:%aN -n 1
+      OUTPUT_VARIABLE _git_last_commit_author
+      OUTPUT_STRIP_TRAILING_WHITESPACE
+      ERROR_QUIET
+      )
+
+    execute_process(
+      COMMAND ${GIT_EXECUTABLE} --no-pager show -s --pretty=format:%ad -n 1
+      OUTPUT_VARIABLE _git_last_commit_date
+      OUTPUT_STRIP_TRAILING_WHITESPACE
+      ERROR_QUIET
+      )
+
+    execute_process(
+      COMMAND ${GIT_EXECUTABLE} rev-parse --abbrev-ref HEAD
+      OUTPUT_VARIABLE _git_branch
+      OUTPUT_STRIP_TRAILING_WHITESPACE
+      ERROR_QUIET
+      )
+  endif()
+
+  configure_file(
+    ${_current_dir}/git_info.h.in
+    ${_header_location}/${_header_name}
+    @ONLY
     )
 
-add_custom_target(
+  unset(_git_last_commit_hash)
+  unset(_git_last_commit_author)
+  unset(_git_last_commit_date)
+  unset(_git_branch)
+
+  add_custom_target(
     git_info
-    ALL DEPENDS ${PROJECT_BINARY_DIR}/git_info.h
+    ALL DEPENDS ${_header_location}/${_header_name}
     )
+endfunction()

test/fc_git_info/cmake/autocmake.yml

@@ -5,7 +5,7 @@ modules:
   - source: ../../../modules/fc.cmake
 - default_build_paths:
   - source: ../../../modules/default_build_paths.cmake
-- src:
-  - source: ../../../modules/src.cmake
 - git_info:
   - source: ../../../modules/git_info/git_info.cmake
+- src:
+  - source: ../../../modules/src.cmake

test/fc_git_info/src/CMakeLists.txt

@@ -1,3 +1,4 @@
+generate_git_info_header()
 include_directories(${PROJECT_BINARY_DIR})
 
 add_executable(example example.F90)