WIP: scripts/report-coverage.sh: codecov: pass -N

Author: blueyed

scripts/report-coverage.sh

@@ -15,4 +15,7 @@ python -m coverage xml
 python -m coverage report -m
 # Set --connect-timeout to work around https://github.com/curl/curl/issues/4461
 curl -S -L --connect-timeout 5 --retry 6 -s https://codecov.io/bash -o codecov-upload.sh
-bash codecov-upload.sh -Z -X fix -f coverage.xml "$@"
+
+base_branch="${GITHUB_BASE_REF:-${TRAVIS_BRANCH}}"
+base_commit=$(git merge-base FETCH_HEAD "$base_branch")
+bash codecov-upload.sh -Z -X fix -f coverage.xml -N "$base_commit" "$@"