CMake: replace GetGitCommitHash with .gitattributes and $Id$.

.gitattributes

@@ -8,3 +8,5 @@
 *.lib  binary
 *.png  binary
 *.slvs binary
+
+/CMakeLists.txt ident

CMakeLists.txt

@@ -22,17 +22,10 @@ set(CMAKE_USER_MAKE_RULES_OVERRIDE_CXX
 
 # project
 
-# NOTE TO PACKAGERS: The embedded git commit hash is critical for rapid bug triage when the builds
-# can come from a variety of sources. If you are mirroring the sources or otherwise build when
-# the .git directory is not present, please comment the following line:
-include(GetGitCommitHash)
-# and instead uncomment the following, adding the complete git hash of the checkout you are using:
-# set(GIT_COMMIT_HASH 0000000000000000000000000000000000000000)
-
 project(solvespace)
 set(solvespace_VERSION_MAJOR 3)
 set(solvespace_VERSION_MINOR 0)
-string(SUBSTRING "${GIT_COMMIT_HASH}" 0 8 solvespace_GIT_HASH)
+string(SUBSTRING "$Id$" 5 8 solvespace_GIT_HASH)
 
 set(ENABLE_GUI        ON CACHE BOOL
     "Whether the graphical interface is enabled")

cmake/GetGitCommitHash.cmake

@@ -1,35 +0,0 @@
-function(get_git_commit_hash)
-    get_filename_component(GIT_DESCRIBE_CMAKE_DIR ${CMAKE_CURRENT_LIST_FILE} PATH)
-    get_filename_component(GIT_ROOT ${GIT_DESCRIBE_CMAKE_DIR} PATH)
-    set(GIT_DIR "${GIT_ROOT}/.git")
-
-    # Add a CMake configure dependency to the currently checked out revision.
-    set(GIT_DEPENDS ${GIT_DIR}/HEAD)
-    file(READ ${GIT_DIR}/HEAD HEAD_REF)
-    if(HEAD_REF MATCHES "ref: (.+)\n")
-        set(HEAD_REF ${CMAKE_MATCH_1})
-        if(EXISTS "${GIT_DIR}/${HEAD_REF}")
-            list(APPEND GIT_DEPENDS ${GIT_DIR}/${HEAD_REF})
-            file(READ ${GIT_DIR}/${HEAD_REF} HEAD_REF)
-        elseif(EXISTS "${GIT_DIR}/packed-refs")
-            list(APPEND GIT_DEPENDS ${GIT_DIR}/packed-refs)
-            file(READ "${GIT_DIR}/packed-refs" PACKED_REFS)
-            if(${PACKED_REFS} MATCHES "([0-9a-z]*) ${HEAD_REF}")
-                set(HEAD_REF ${CMAKE_MATCH_1})
-            else()
-                set(HEAD_REF "")
-            endif()
-        else()
-            set(HEAD_REF "")
-        endif()
-    endif()
-    set_property(DIRECTORY APPEND PROPERTY CMAKE_CONFIGURE_DEPENDS ${GIT_DEPENDS})
-
-    string(STRIP ${HEAD_REF} HEAD_REF)
-    if(HEAD_REF STREQUAL "")
-        message(WARNING "Cannot determine git HEAD")
-    else()
-        set(GIT_COMMIT_HASH ${HEAD_REF} PARENT_SCOPE)
-    endif()
-endfunction()
-get_git_commit_hash()