easily switch the default GIT branch from master to main

libertus.sh

#!/bin/sh -e

# Switch the default GIT branch from `master` to `main`
# for GitHub users, it can do the remote change too, but:
# 1. assumes that the name of the current directory name is the repo name
# 2. you must provide valid user and token to authenticate

user=
token=

git checkout master
git pull
git checkout -b main
git push -u origin main

# optional, github only
if [ -n "$user" ] && [ -n "$token" ]; then
curl	-s -u "$user:$token" \
	-H 'Accept: application/vnd.github.v3+json' \
	-X PATCH \
	"https://api.github.com/repos/$user/${PWD##*/}" \
	-d '{"default_branch": "main"}' | grep default_branch
fi

# optional, delete old master
git branch -d master
git push origin :master