git tag release-x.y.z-RC0 -m "Bigtop X.Y.Z release."
git push upstream release--tags x.y.z-RC0

VERSION=X.Y.Z
RC_NUMBER=n

cd /work
git clone https://gitbox.apache.org/repos/asf/bigtop.git -b release-${VERSION}-RC${RC_NUMBER} --depth 1
wget --no-parent --recursive --reject='index.html*' https://dist.apache.org/repos/dist/dev/bigtop/bigtop-${VERSION}-RC${RC_NUMBER}/

# make sure that the source code tree and the release tarball are identical except for .git/CI/site releated files
tar xf dist.apache.org/repos/dist/dev/bigtop/bigtop-${VERSION}-RC${RC_NUMBER}/bigtop-${VERSION}-project.tar.gz
diff -r bigtop bigtop-${VERSION}

# make sure that the signature and checksums are correct
cd dist.apache.org/repos/dist/dev/bigtop/bigtop-${VERSION}-RC${RC_NUMBER}
gpg --verify bigtop-${VERSION}-project.tar.gz.asc bigtop-${VERSION}-project.tar.gz
diff <(sha256sum bigtop-${VERSION}-project.tar.gz) bigtop-${VERSION}-project.tar.gz.sha256 
diff <(sha512sum bigtop-${VERSION}-project.tar.gz) bigtop-${VERSION}-project.tar.gz.sha512 

# make sure that all files exist and their signatures are correct
for i in $(find repos -not -name '*.asc' -type f); do echo ${i}; gpg --verify ${i}.asc ${i}; done