Do not apply patches if repo is a not a git repo.

Also backports fb75598

Author: haonanya1

cmake/modules/CMakeFunctions.cmake

@@ -56,7 +56,6 @@ function(is_backport_patch_present patch_path repo_dir patch_in_branch)
         WORKING_DIRECTORY ${repo_dir}
         RESULT_VARIABLE patch_not_in_branches
         OUTPUT_QUIET
-        ERROR_QUIET
         )
     if(patch_not_in_branches)
         set(patch_in_branch False PARENT_SCOPE) # The patch is not present in local branch
@@ -73,7 +72,6 @@ function(is_valid_revision repo_dir revision return_val)
         COMMAND ${GIT_EXECUTABLE} log -1 ${revision}
         WORKING_DIRECTORY ${repo_dir}
         RESULT_VARIABLE output_var
-        ERROR_QUIET
         OUTPUT_QUIET
         )
     if(${output_var} EQUAL 0)
@@ -101,14 +99,13 @@ function(apply_patches repo_dir patches_dir base_revision target_branch)
         COMMAND ${GIT_EXECUTABLE} rev-parse --verify --no-revs -q ${target_branch}
         WORKING_DIRECTORY ${repo_dir}
         RESULT_VARIABLE patches_needed
-        ERROR_QUIET
         OUTPUT_QUIET
     )
-    if(patches_needed EQUAL "128")
-      message(STATUS "[OPENCL-CLANG] ${repo_dir} is not a git repository")
+    if(patches_needed EQUAL 128)
+      message(STATUS "[OPENCL-CLANG][Warning] ${repo_dir} is not a git repository, therefore, local patches are not applied")
       return()
     endif()
-    if(patches_needed EQUAL "1") # The target branch doesn't exist
+    if(patches_needed EQUAL 1) # The target branch doesn't exist
         list(SORT patches)
         is_valid_revision(${repo_dir} ${base_revision} exists_base_rev)
 
@@ -118,7 +115,6 @@ function(apply_patches repo_dir patches_dir base_revision target_branch)
                 WORKING_DIRECTORY ${repo_dir}
                 OUTPUT_VARIABLE repo_head
                 OUTPUT_STRIP_TRAILING_WHITESPACE
-                ERROR_QUIET
                 )
             message(STATUS "[OPENCL-CLANG] ref ${base_revision} not exists in repository, using current HEAD:${repo_head}")
             set(base_revision ${repo_head})
@@ -141,19 +137,20 @@ function(apply_patches repo_dir patches_dir base_revision target_branch)
                     COMMAND ${GIT_EXECUTABLE} am --3way --ignore-whitespace ${patch}
                     WORKING_DIRECTORY ${repo_dir}
                     OUTPUT_VARIABLE patching_log
-                    ERROR_QUIET
                 )
                 message(STATUS "[OPENCL-CLANG] Not present - ${patching_log}")
             endif()
         endforeach(patch)
-    elsef(patches_needed EQUAL "0") # The target branch already exists
+    elsef(patches_needed EQUAL 0) # The target branch already exists
         execute_process( # Check it out
             COMMAND ${GIT_EXECUTABLE} checkout ${target_branch}
             WORKING_DIRECTORY ${repo_dir}
-            ERROR_QUIET
             OUTPUT_QUIET
         )
     endif()
+    if (ret_check_out OR ret_apply_patch)
+      message(FATAL_ERROR "[OPENCL-CLANG] Failed to apply patch!")
+    endif()
 endfunction()
 
 # Usage