externalize.sh

#!/bin/bash -e

function externalize_git {
  if [ ! -d "$git_repos_repo_full_path" ]; then
    mkdir -p "$git_repos_repo_full_path"
    mv .git "${git_repos_repo_full_path}"/.git
    git --git-dir="${git_repos_repo_full_path}/.git" --work-tree=. init && echo "gitdir: ${git_repos_repo_full_path}/.git" > .git
  else
    echo "Directory $git_repos_repo_full_path already exists!"
  fi
}

function move_and_link {
  mkdir -p `dirname "${git_repos_repo_full_path}"/"$1"`
  mv "$1" "${git_repos_repo_full_path}"/"$1"
  ln -s "${git_repos_repo_full_path}"/"$1" "$1"
}

function externalize_node {
  if [ ! -d "$git_repos_repo_full_path" ]; then
    echo "Directory $git_repos_repo_full_path doesn't exist!"
  else
    move_and_link "node_modules"
  fi
}

function externalize_ruby {
  if [ ! -d "$git_repos_repo_full_path" ]; then
    echo "Directory $git_repos_repo_full_path doesn't exist!"
  else
    move_and_link "tmp"
    move_and_link "log"
    move_and_link "public/assets"
  fi
}

if [[ "$#" == "0" ]]; then
  echo "Wrong number of arguments. Provide type of externalization: git|npm|ruby"
else
  current_dir=${PWD##*/}
  current_full_path=$PWD
  developer_full_path=$HOME/Developer
  developer_full_path_length=${#developer_full_path}
  relative_path=${current_full_path:$developer_full_path_length+1}
  git_repos_repo_full_path=$HOME/git-repos/"${relative_path}"

  if [[ "$1" == "git" ]]; then
    externalize_git
  elif [[ "$1" == "ruby" ]]; then
    externalize_ruby
  elif [[ "$1" == "npm" ]]; then
    externalize_node
  else
    echo "Wront externalization parameter. Valid options include: git|npm|ruby"
  fi
fi

I use this script to move and link directories with a lot of small files for which OneDrive chokes on.

This works for me, YMMV.

Like it! (Sad, that one need to use scripts like this to make OneDrive sync properly ...)
As far as I can see, you need to run this 'manually' if you created new folders?
Did you find any approach to handle this automatically, eg. having a file watcher for your OneDrive folder or something similar?