Disable sccache setup

Author: tstellar

.github/workflows/premerge.yaml

@@ -76,18 +76,21 @@ jobs:
           export CC=/opt/llvm/bin/clang
           export CXX=/opt/llvm/bin/clang++
 
-          # This environment variable is passes into the container through the
-          # runner pod definition. This differs between our two clusters which
-          # why we do not hardcode it.
-          export SCCACHE_GCS_BUCKET=$CACHE_GCS_BUCKET
-          export SCCACHE_GCS_RW_MODE=READ_WRITE
-
-          # Set the idle timeout to zero to ensure sccache runs for the
-          # entire duration of the job. Otherwise it might stop if we run
-          # several test suites in a row and discard statistics that we want
-          # to save in the end.
-          export SCCACHE_IDLE_TIMEOUT=0
-          sccache --start-server
+          if ! [[ "${{ matrix.runs_on }}" =~ "^depot" ]; then
+
+            # This environment variable is passes into the container through the
+            # runner pod definition. This differs between our two clusters which
+            # why we do not hardcode it.
+            export SCCACHE_GCS_BUCKET=$CACHE_GCS_BUCKET
+            export SCCACHE_GCS_RW_MODE=READ_WRITE
+
+            # Set the idle timeout to zero to ensure sccache runs for the
+            # entire duration of the job. Otherwise it might stop if we run
+            # several test suites in a row and discard statistics that we want
+            # to save in the end.
+            export SCCACHE_IDLE_TIMEOUT=0
+            sccache --start-server
+          fi
 
           ./.ci/monolithic-linux.sh "${projects_to_build}" "${project_check_targets}" "${runtimes_to_build}" "${runtimes_check_targets}" "${runtimes_check_targets_needs_reconfig}" "${enable_cir}"
       - name: Upload Artifacts