Rename Git master to main branch via GitHub API

rename-git-master-branch.sh

#!/bin/bash

#
# replace `GITHUBTOKEN` with custom token from https://github.com/settings/tokens, having `repo` admin access
#
for repo in $(curl -s -H "Authorization: token GITHUBTOKEN" 'https://api.github.com/orgs/TYPO3-CMS/repos?per_page=100' | jq -r '.[] | .url' | sort)
do
  echo "Renaming ${repo}..."
  
  response=$(curl -s -X POST \
    -H "Authorization: token GITHUBTOKEN" \
    -H "Accept: application/vnd.github.v3+json" \
    ${repo}/branches/master/rename \
    -d '{"new_name":"main"}')

  name=$(echo ${response} | jq -r '.name')
  if [ "${name}" == "main" ]
  then
    echo "OK: ${name}"
  else
    echo "FAILED"
    echo ${response}
  fi
  echo
done