major-or-minor.sh

git checkout \
  $(git show -s --pretty='%T' \
    $(git show-ref -d \
      $(git describe --abbrev=0) |\  # grab the most recent tag
      tail -n1 |\
      awk '{print $1}'\              # dereference the commit hash it refers to
    )\                               # ... show the tree-hash it points at
  ) -- test                          # check that version's "test/" directory out into cwd
  make test                          # if this fails, you should bump major, 
                                     # otherwise bump minor or patch.