operations/dns triggers operations-dns-tabs which does a very basic check for tabulations:
#!/bin/bash -e echo "Looking for tabulations in files matching: *" set -x (grep --recursive -P '^\t' --exclude-dir='.git' --include='*' .) && HAS_TAB=1 || HAS_TAB=0 exit $HAS_TAB
Can probably be replaced with a git grep -P.
The job uses a shallow clone.