CI: allow configurable builds outside gitlab-runner

CI/main_ci.cmake

@@ -26,13 +26,22 @@ set (ENV{LANG} "C") # Only ascii output
 set (CTEST_BUILD_CONFIGURATION "Release")
 set (CTEST_CMAKE_GENERATOR "Ninja")
 
+# detect short sha
+if(NOT DEFINED ENV{CI_COMMIT_SHORT_SHA})
+  execute_process(COMMAND git log -1 --pretty=format:%h
+                  WORKING_DIRECTORY ${OTB_SOURCE_DIR}
+                  OUTPUT_VARIABLE ci_short_sha)
+else()
+  set(ci_short_sha "$ENV{CI_COMMIT_SHORT_SHA}")
+endif()
+
 # Find the build name and CI profile
 set(ci_profile wip)
 set(ci_mr_source "$ENV{CI_MERGE_REQUEST_SOURCE_BRANCH_NAME}")
 set(ci_mr_target "$ENV{CI_MERGE_REQUEST_TARGET_BRANCH_NAME}")
 set(ci_mr_iid "$ENV{CI_MERGE_REQUEST_IID}")
 set(ci_ref_name "$ENV{CI_COMMIT_REF_NAME}")
-set (CTEST_BUILD_NAME "$ENV{CI_COMMIT_SHORT_SHA}")
+set (CTEST_BUILD_NAME ${ci_short_sha})
 if(ci_mr_source AND ci_mr_target AND ci_mr_iid)
   set (CTEST_BUILD_NAME "${ci_mr_source} (MR ${ci_mr_iid})")
   set(ci_profile mr)
@@ -45,14 +54,26 @@ elseif(ci_ref_name)
   endif()
 endif()
 
-#Warning, this variable is used in cdash_status.py. If change from 
-# ${IMAGE_NAME} to something else do not forget to change it.
+# Detect site
+if(NOT DEFINED IMAGE_NAME)
+  if(DEFINED ENV{IMAGE_NAME})
+    set(IMAGE_NAME $ENV{IMAGE_NAME})
+  endif()
+endif()
 set (CTEST_SITE "${IMAGE_NAME}")
 
 # Directory variable
 set (CTEST_SOURCE_DIRECTORY "${OTB_SOURCE_DIR}")
-set (CTEST_BINARY_DIRECTORY "${OTB_SOURCE_DIR}/build/")
-set (CTEST_INSTALL_DIRECTORY "${OTB_SOURCE_DIR}/install/")
+if(BUILD_DIR)
+  set (CTEST_BINARY_DIRECTORY "${BUILD_DIR}")
+else()
+  set (CTEST_BINARY_DIRECTORY "${OTB_SOURCE_DIR}/build/")
+endif()
+if(INSTALL_DIR)
+  set (CTEST_INSTALL_DIRECTORY "${INSTALL_DIR}")
+else()
+  set (CTEST_INSTALL_DIRECTORY "${OTB_SOURCE_DIR}/install/")
+endif()
 set (PROJECT_SOURCE_DIR "${OTB_SOURCE_DIR}")
 
 # Ctest command value