Add cmake option to only create data targets

This is useful for the standalone system tests that won't necessarily
have all of the Mantid build dependencies installed.
Refs #10870

Code/Mantid/Build/CMake/CommonSetup.cmake

@@ -305,36 +305,7 @@ endif()
 # External Data for testing
 ###########################################################################
 if ( CXXTEST_FOUND OR PYUNITTEST_FOUND )
-  include ( MantidExternalData )
-
-  # None of our tests reference files directly as arguments so we have to manually
-  # call ExternalData_Expand_Arguments to register the files with the ExternalData
-  # mechanism
-  function(_create_data_target _targetname _content_link_patterns)
-    get_filename_component ( EXTERNALDATATEST_SOURCE_DIR ${PROJECT_SOURCE_DIR} ABSOLUTE )
-    foreach(_pattern ${_content_link_patterns})
-      file( GLOB_RECURSE _content_links
-        RELATIVE "${EXTERNALDATATEST_SOURCE_DIR}" ${_pattern} )
-      foreach(link ${_content_links})
-        string( REGEX REPLACE "\\.md5$" "" link ${link} )
-        ExternalData_Expand_Arguments( ${_targetname}
-          link_location
-          DATA{${link}}
-        )
-      endforeach()
-    endforeach()
-    # Create target to download data from the StandardTestData group.  This must come after
-    # all tests have been added that reference the group, so we put it last.
-    ExternalData_Add_Target(${_targetname})
-    set_target_properties(${_targetname} PROPERTIES EXCLUDE_FROM_ALL TRUE)
-  endfunction()
-
-  # We'll create two targets:
-  #  - StandardTestData: data required by the unit tests and documentation tests
-  #  - SystemTestData: data required for the system tests
-  _create_data_target(StandardTestData "Testing/Data/DocTest/*.md5;Testing/Data/UnitTest/*.md5")
-  _create_data_target(SystemTestData "Testing/Data/SystemTest/*.md5;Testing/SystemTests/tests/analysis/reference/*.md5")
-
+  include( SetupDataTargets )
 endif()
 
 ###########################################################################

Code/Mantid/Build/CMake/SetupDataTargets.cmake

+###########################################################################
+# Define targets to download the data
+###########################################################################
+include ( MantidExternalData )
+
+# None of our tests reference files directly as arguments so we have to manually
+# call ExternalData_Expand_Arguments to register the files with the ExternalData
+# mechanism
+function(_create_data_target _targetname _content_link_patterns)
+  get_filename_component ( EXTERNALDATATEST_SOURCE_DIR ${PROJECT_SOURCE_DIR} ABSOLUTE )
+  foreach(_pattern ${_content_link_patterns})
+    file( GLOB_RECURSE _content_links
+      RELATIVE "${EXTERNALDATATEST_SOURCE_DIR}" ${_pattern} )
+    foreach(link ${_content_links})
+      string( REGEX REPLACE "\\.md5$" "" link ${link} )
+      ExternalData_Expand_Arguments( ${_targetname}
+        link_location
+        DATA{${link}}
+      )
+    endforeach()
+  endforeach()
+  # Create target to download data from the StandardTestData group.  This must come after
+  # all tests have been added that reference the group, so we put it last.
+  ExternalData_Add_Target(${_targetname})
+  set_target_properties(${_targetname} PROPERTIES EXCLUDE_FROM_ALL TRUE)
+endfunction()
+
+# We'll create two targets:
+#  - StandardTestData: data required by the unit tests and documentation tests
+#  - SystemTestData: data required for the system tests
+_create_data_target(StandardTestData "Testing/Data/DocTest/*.md5;Testing/Data/UnitTest/*.md5")
+_create_data_target(SystemTestData "Testing/Data/SystemTest/*.md5;Testing/SystemTests/tests/analysis/reference/*.md5")

Code/Mantid/Build/Jenkins/systemtests

@@ -41,11 +41,11 @@ fi
 cd $WORKSPACE/build
 
 ###############################################################################
-# CMake configuration if it has not already been configured
+# CMake configuration if it has not already been configured.
 # We use the special flag that only creates the targets for the data
 ###############################################################################
 if [[ ! -e $WORKSPACE/build/CMakeCache.txt ]]; then
-  $SCL_ON_RHEL6 "cmake -DMANTID_DATA_STORE=${MANTID_DATA_STORE} -DTESTING_DATA_ONLY=ON ../Code/Mantid"
+  $SCL_ON_RHEL6 "cmake -DMANTID_DATA_STORE=${MANTID_DATA_STORE} -DDATA_TARGETS_ONLY=ON ../Code/Mantid"
 fi
 
 ###############################################################################

Code/Mantid/CMakeLists.txt

@@ -12,6 +12,17 @@ set ( CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/Build/CMake")
 
 # Define the project name.
 project ( Mantid )
+
+###########################################################################
+# Quick exit if we only want data targets
+###########################################################################
+if( DATA_TARGETS_ONLY )
+  include( SetupDataTargets )
+  # System test config files
+  add_subdirectory( Testing/SystemTests/scripts )
+  return()
+endif()
+
 set ( CPACK_PACKAGE_SUFFIX "" CACHE STRING "suffix used to determine the deployment type")
 set_property(CACHE CPACK_PACKAGE_SUFFIX PROPERTY STRINGS nightly unstable "") #empty string and release are treated as the same thing
 
@@ -147,7 +158,7 @@ add_subdirectory ( scripts )
 
 add_subdirectory ( docs )
 
-# System tests
+# System test data target
 add_subdirectory ( Testing/SystemTests/scripts )
 
 ###########################################################################