Try to collect coverage with Bazel BWOB

Signed-off-by: Vihang Mehta <vihang@gimletlabs.ai>

Author: vihangm

.bazelrc

@@ -20,6 +20,7 @@ build --remote_download_minimal
 test --remote_download_minimal
 run --remote_download_outputs=all
 coverage --build_runfile_links
+coverage --nocache_test_results
 
 # Needed by rules_meta.
 # Follow https://github.com/fmeum/rules_meta/issues/1#issuecomment-1255828109
@@ -269,3 +270,4 @@ build:remote --build_metadata=VISIBILITY=PUBLIC
 coverage:remote --strategy=CoverageReport=local,remote
 coverage:remote --experimental_fetch_all_coverage_outputs
 coverage:remote --experimental_split_coverage_postprocessing
+coverage:remote --experimental_remote_download_regex=.*/(coverage.dat$|_coverage/_coverage_report.dat$)

ci/collect_coverage.sh

@@ -138,12 +138,13 @@ check_config
 # Print config parameters.
 print_config
 
-lcov_opts=(--rc lcov_branch_coverage=1)
+# TODO: Try to track down the negative coverage issue.
+lcov_opts=(--rc branch_coverage=1 --ignore-errors negative)
 
 cd $(bazel info workspace)
 
 # Get coverage from bazel targets.
-bazel coverage --remote_download_outputs=all --combined_report=lcov //src/...
+bazel coverage --combined_report=lcov //src/...
 
 # Copy the output file
 cp --no-preserve=mode "$(bazel info output_path)/_coverage/_coverage_report.dat" ${COVERAGE_FILE}