Auto-version system

indra/cmake/BuildVersion.cmake

@@ -1,23 +1,41 @@
 # -*- cmake -*-
 
-function (build_version _target)
-  # Read version components from the header file.
-  file(STRINGS ${LIBS_OPEN_DIR}/llcommon/llversion${_target}.h lines
-       REGEX " LL_VERSION_")
-  foreach(line ${lines})
-    string(REGEX REPLACE ".*LL_VERSION_([A-Z]+).*" "\\1" comp "${line}")
-    string(REGEX REPLACE ".* = ([0-9]+);.*" "\\1" value "${line}")
-    set(v${comp} "${value}")
-  endforeach(line)
+# Read version components from the header file.
+file(STRINGS ${LIBS_OPEN_DIR}/llcommon/llversionviewer.h.in lines
+   REGEX " LL_VERSION_")
+foreach(line ${lines})
+  string(REGEX REPLACE ".*LL_VERSION_([A-Z]+).*" "\\1" comp "${line}")
+  string(REGEX REPLACE ".* = ([0-9]+);.*" "\\1" value "${line}")
+  set(v${comp} "${value}")
+endforeach(line)
 
-  # Compose the version.
-  set(${_target}_VERSION "${vMAJOR}.${vMINOR}.${vPATCH}.${vBUILD}")
-  if (${_target}_VERSION MATCHES "^[0-9]+\\.[0-9]+\\.[0-9]+\\.[0-9]+$")
-    message(STATUS "Version of ${_target} is ${${_target}_VERSION}")
-  else (${_target}_VERSION MATCHES "^[0-9]+\\.[0-9]+\\.[0-9]+\\.[0-9]+$")
-    message(FATAL_ERROR "Could not determine ${_target} version (${${_target}_VERSION})")
-  endif (${_target}_VERSION MATCHES "^[0-9]+\\.[0-9]+\\.[0-9]+\\.[0-9]+$")
+execute_process(
+    COMMAND git rev-list HEAD
+    OUTPUT_VARIABLE GIT_REV_LIST_STR
+    WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
+    OUTPUT_STRIP_TRAILING_WHITESPACE
+)
 
-  # Report version to caller.
-  set(${_target}_VERSION "${${_target}_VERSION}" PARENT_SCOPE)
-endfunction (build_version)
+string(REPLACE "\n" ";" GIT_REV_LIST ${GIT_REV_LIST_STR})
+
+if(GIT_REV_LIST)
+  list(LENGTH GIT_REV_LIST vBUILD)
+else()
+  set(vBUILD 99)
+endif()
+
+configure_file(
+    ${CMAKE_SOURCE_DIR}/llcommon/llversionviewer.h.in
+    ${CMAKE_SOURCE_DIR}/llcommon/llversionviewer.h
+)
+
+# Compose the version.
+set(viewer_VERSION "${vMAJOR}.${vMINOR}.${vPATCH}.${vBUILD}")
+if (viewer_VERSION MATCHES "^[0-9]+\\.[0-9]+\\.[0-9]+\\.[0-9]+$")
+  message(STATUS "Version is ${viewer_VERSION}")
+else (viewer_VERSION MATCHES "^[0-9]+\\.[0-9]+\\.[0-9]+\\.[0-9]+$")
+  message(FATAL_ERROR "Could not determine version (${viewer_VERSION})")
+endif (viewer_VERSION MATCHES "^[0-9]+\\.[0-9]+\\.[0-9]+\\.[0-9]+$")
+
+# Report version to caller.
+#set(viewer_VERSION "${viewer_VERSION}" PARENT_SCOPE)