WIP

git_extensions.sh

git::logger() {
  :
  if [ "$1" = "subtree" ]; then
    if [ "$2" = "add" ]; then
      # --: git subtree add   --prefix=<prefix> <commit>
      # or: git subtree add   --prefix=<prefix> <repository> <ref>
      # or: git subtree merge --prefix=<prefix> <commit>
      # or: git subtree pull  --prefix=<prefix> <repository> <ref>
      # or: git subtree push  --prefix=<prefix> <repository> <ref>
      # or: git subtree split --prefix=<prefix> <commit...>
    fi
  fi
}