Buildsystem/CMake: Allow building the core without the gitchecks, this is done in the GUI, or through the DISABLEGITCHECK parameter on *nix-platforms.

DO NOTE THAT WE WILL NOT GIVE SUPPORT ON ANY CORE-VERSION COMPILED WITH THIS FLAG, AS WE CAN NOT EFFECTIVELY FIND OUT WHAT REVISION YOU ARE ON

1 files changed, 69 insertions, 54 deletions

diff --git a/cmake/genrev.cmake b/cmake/genrev.cmake
index 0df1770e142..86acc6df22f 100644
--- a/cmake/genrev.cmake
+++ b/cmake/genrev.cmake
@@ -10,70 +10,85 @@
 
 include(${CMAKE_SOURCE_DIR}/cmake/macros/EnsureVersion.cmake)
 
-set(_REQUIRED_GIT_VERSION "1.7")
+# User has manually chosen to ignore the git-tests, so we create an arbitrary string for the revisionhash/date as well
+if(DISABLEGITCHECK)
+  message(STATUS "
+  By choosing the DISABLEGITCHECK option, you waive all rights for support, and accept
+  that any or all requests for assistance by you to core developers will be rejected.
 
-find_program(GIT_EXEC
-  NAMES
-    git git.cmd
-  HINTS
-    ENV PATH
-  DOC "Full path to git commandline client"
-)
-MARK_AS_ADVANCED(GIT_EXEC)
+  You, as user, take full responsibility for issues, problems etc that might arise
+  from using the core, as we we can not properly detect what codebase you're using.
 
-if(NOT GIT_EXEC)
-  message(FATAL_ERROR "
-      Git was NOT FOUND on your system - did you forget to install a recent version, or setting the path to it?
-      Observe that for revision hash/date to work you need at least version ${_REQUIRED_GIT_VERSION}
+  We remind you that you need to use the repository and a proper version of git for
+  the revision/hash to work, and thus get our support if the need arises.
   ")
+
+  # Set an arbitrary date and hash, so we can match on that
+  set(rev_date "0000-00-00 00:00:00 +0000")
+  set(rev_hash "TC-COPY-WITH-NO-GIT-SUPPORT")
 else()
-  execute_process(
-    COMMAND "${GIT_EXEC}" --version
-    WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}"
-    OUTPUT_VARIABLE _GIT_VERSION
-    ERROR_QUIET
+  set(_REQUIRED_GIT_VERSION "1.7")
+  find_program(GIT_EXEC
+    NAMES
+      git git.cmd
+    HINTS
+      ENV PATH
+    DOC "Full path to git commandline client"
   )
+  MARK_AS_ADVANCED(GIT_EXEC)
 
-  # make sure we're using minimum the required version of git, so the "dirty-testing" will work properly
-  ensure_version( "${_REQUIRED_GIT_VERSION}" "${_GIT_VERSION}" _GIT_VERSION_OK)
-
-  # throw an error if we don't have a recent enough version of git...
-  if(NOT _GIT_VERSION_OK)
+  if(NOT GIT_EXEC)
     message(FATAL_ERROR "
-      Git was found but is OUTDATED - did you forget to install a recent version, or setting the path to it?
-      Observe that for revision hash/date to work you need at least version ${_REQUIRED_GIT_VERSION}
-    ")
+  Git was NOT FOUND on your system - did you forget to install a recent version, or setting the path to it?
+  Observe that for revision hash/date to work you need at least version ${_REQUIRED_GIT_VERSION}")
+  else()
+    execute_process(
+      COMMAND "${GIT_EXEC}" --version
+      WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}"
+      OUTPUT_VARIABLE _GIT_VERSION
+      ERROR_QUIET
+    )
+
+    # make sure we're using minimum the required version of git, so the "dirty-testing" will work properly
+    ensure_version( "${_REQUIRED_GIT_VERSION}" "${_GIT_VERSION}" _GIT_VERSION_OK)
+
+    # throw an error if we don't have a recent enough version of git...
+    if(NOT _GIT_VERSION_OK)
+      message(FATAL_ERROR "
+  Git was found but is OUTDATED - did you forget to install a recent version, or setting the path to it?
+  Observe that for revision hash/date to work you need at least version ${_REQUIRED_GIT_VERSION}")
+    endif()
   endif()
-endif()
 
-if(_GIT_VERSION_OK)
-  execute_process(
-    COMMAND "${GIT_EXEC}" describe --match init --dirty=+ --abbrev=12
-    WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}"
-    OUTPUT_VARIABLE rev_info
-    OUTPUT_STRIP_TRAILING_WHITESPACE
-    ERROR_QUIET
-  )
-  execute_process(
-    COMMAND "${GIT_EXEC}" show -s --format=%ci
-    WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}"
-    OUTPUT_VARIABLE rev_date
-    OUTPUT_STRIP_TRAILING_WHITESPACE
-    ERROR_QUIET
-  )
-endif()
+  if(_GIT_VERSION_OK)
+    execute_process(
+      COMMAND "${GIT_EXEC}" describe --match init --dirty=+ --abbrev=12
+      WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}"
+      OUTPUT_VARIABLE rev_info
+      OUTPUT_STRIP_TRAILING_WHITESPACE
+      ERROR_QUIET
+    )
+    execute_process(
+      COMMAND "${GIT_EXEC}" show -s --format=%ci
+      WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}"
+      OUTPUT_VARIABLE rev_date
+      OUTPUT_STRIP_TRAILING_WHITESPACE
+      ERROR_QUIET
+    )
+  endif()
 
-# Last minute check - ensure that we have a proper revision
-# If everything above fails (means the user has erased the git revision control directory or removed the origin/HEAD tag)
-if(NOT rev_info)
-  # No valid ways available to find/set the revision/hash, so let's force some defaults
-  message(STATUS "WARNING - Missing repository tags - you may need to pull tags with git fetch -t")
-  message(STATUS "WARNING - Continuing anyway - note that the versionstring will be set to 0000-00-00 00:00:00 (Archived)")
-  set(rev_date "0000-00-00 00:00:00 +0000")
-  set(rev_hash "Archived")
-else()
-  # Extract information required to build a proper versionstring
-  string(REGEX REPLACE init-|[0-9]+-g "" rev_hash ${rev_info})
+  # Last minute check - ensure that we have a proper revision
+  # If everything above fails (means the user has erased the git revision control directory or removed the origin/HEAD tag)
+  if(NOT rev_info)
+    # No valid ways available to find/set the revision/hash, so let's force some defaults
+    message(STATUS "WARNING - Missing repository tags - you may need to pull tags with git fetch -t")
+    message(STATUS "WARNING - Continuing anyway - note that the versionstring will be set to 0000-00-00 00:00:00 (Archived)")
+    set(rev_date "0000-00-00 00:00:00 +0000")
+    set(rev_hash "Archived")
+  else()
+    # Extract information required to build a proper versionstring
+    string(REGEX REPLACE init-|[0-9]+-g "" rev_hash ${rev_info})
+  endif()
 endif()
 
 # Its not set during initial run