Fetch versions for smtk/cmb master from gitlab

CMakeLists.txt

@@ -11,8 +11,12 @@ macro (superbuild_setup_variables)
   if (cmb_SOURCE_SELECTION STREQUAL "git")
     # Assuming master; just use the latest version, but let the user set their
     # own version in case it is actually a branch from some other version.
-    set(CMB_VERSION_DEFAULT "6.0.0"
+    set(CMB_VERSION_DEFAULT "<FETCH_FROM_GIT>"
       CACHE STRING "The default version of CMB to use if it cannot be detected")
+    if (CMB_VERSION_DEFAULT STREQUAL "<FETCH_FROM_GIT>")
+      include(cmbVersion)
+      set(CMB_VERSION_DEFAULT "${cmb_version_major}.${cmb_version_minor}.${cmb_version_patch}")
+    endif ()
     mark_as_advanced(CMB_VERSION_DEFAULT)
     set(cmb_default_version "${CMB_VERSION_DEFAULT}")
   elseif (cmb_SOURCE_SELECTION STREQUAL "source")
@@ -29,8 +33,12 @@ macro (superbuild_setup_variables)
   if (smtk_SOURCE_SELECTION STREQUAL "git" OR smtk_SOURCE_SELECTION STREQUAL "from_cmb")
     # Assuming master; just use the latest version, but let the user set their
     # own version in case it is actually a branch from some other version.
-    set(SMTK_VERSION_DEFAULT "3.0.0"
+    set(SMTK_VERSION_DEFAULT "<FETCH_FROM_GIT>"
       CACHE STRING "The default version of SMTK to use if it cannot be detected")
+    if (SMTK_VERSION_DEFAULT STREQUAL "<FETCH_FROM_GIT>")
+      include(smtkVersion)
+      set(SMTK_VERSION_DEFAULT "${smtk_version_major}.${smtk_version_minor}.${smtk_version_patch}")
+    endif ()
     mark_as_advanced(SMTK_VERSION_DEFAULT)
     set(smtk_default_version "${SMTK_VERSION_DEFAULT}")
   elseif (smtk_SOURCE_SELECTION STREQUAL "source")

cmake/cmbVersion.cmake

+# Download SMTK's master branch version.txt
+file(DOWNLOAD https://gitlab.kitware.com/cmb/cmb/raw/master/version.txt
+  ${CMAKE_CURRENT_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/cmbVersion.txt STATUS status)
+list(GET status 0 error_code)
+if (error_code)
+  message(FATAL_ERROR "Could not access the version file for CMB")
+endif ()
+
+file(STRINGS ${CMAKE_CURRENT_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/cmbVersion.txt version_string )
+
+string(REGEX MATCH "([0-9]+)\\.([0-9]+)\\.([0-9]+)[-]*(.*)"
+  version_matches "${version_string}")
+
+set(cmb_version_major ${CMAKE_MATCH_1})
+set(cmb_version_minor ${CMAKE_MATCH_2})
+set(cmb_version_patch "${CMAKE_MATCH_3}")
+# Do we just have a patch version or are there extra stuff?
+if (CMAKE_MATCH_4)
+  set(cmb_version_patch "${CMAKE_MATCH_3}-${CMAKE_MATCH_4}")
+endif()
+set(cmb_version "${cmb_version_major}.${cmb_version_minor}")

cmake/smtkVersion.cmake

+# Download SMTK's master branch version.txt
+file(DOWNLOAD https://gitlab.kitware.com/cmb/smtk/raw/master/version.txt
+  ${CMAKE_CURRENT_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/smtkVersion.txt STATUS status)
+list(GET status 0 error_code)
+if (error_code)
+  message(FATAL_ERROR "Could not access the version file for SMTK")
+endif ()
+
+file(STRINGS ${CMAKE_CURRENT_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/smtkVersion.txt version_string )
+
+string(REGEX MATCH "([0-9]+)\\.([0-9]+)\\.([0-9]+)[-]*(.*)"
+  version_matches "${version_string}")
+
+set(smtk_version_major ${CMAKE_MATCH_1})
+set(smtk_version_minor ${CMAKE_MATCH_2})
+set(smtk_version "${smtk_version_major}.${smtk_version_minor}")
+if (CMAKE_MATCH_3)
+  set(smtk_version_patch ${CMAKE_MATCH_3})
+  set(smtk_version "${smtk_version}.${smtk_version_patch}")
+else()
+  set(smtk_version_patch 0)
+endif()
+# To be thorough, we should split the label into "-prerelease+metadata"
+# and, if prerelease is specified, use it in determining precedence
+# according to semantic versioning rules at http://semver.org/ .
+# For now, just make the information available as a label:
+if (CMAKE_MATCH_4)
+  set(smtk_version_label "${CMAKE_MATCH_4}")
+endif()