Rename local and remote to

rename-default-main

#!/bin/sh -eux

# usage:
#   cd into where you keep your git repositories then run this script.
#   if you want to only update a single repository, comment out the loop
#   below and calling this script from within the project you want changed.

update() {
  git stash
  # If you use something like GitHub, you will also
  # need to do some GUI poking on the repos settings.
  # Also be sure to update relevant CI details.
  echo "  + updating remote"
  git checkout master
  git branch -m master main
  git push -u origin main
  echo "  + updating local"
  git fetch
  git branch --unset-upstream
  git branch -u origin/main
  git symbolic-ref refs/remotes/origin/HEAD refs/remotes/origin/main
}

for dir in */; do
  project="$(dirname $dir | xargs basename)"
  cd "$dir"
  echo "+ $project"
  update
  cd - >/dev/null
done