Script to reset the default branch

reset-default-branch

#!/bin/bash

if [ $# -ne 1 ]; then
  echo "Usage: $0 GITHUB_TOKEN" >&2
  exit 1
fi

TOKEN="$1"

ORIGIN="$(git remote get-url origin)"
if [ $? -ne 0 ]; then
  echo "Could not get origin url in $(pwd)" >&2
  exit 1
fi

if ! grep '^\(git@github.com:\|https://github.com/\)\([^/]\+/[^/]\+\)\.git$' <<< "$ORIGIN" >/dev/null 2>/dev/null; then
  echo "origin url $ORIGIN is not a recognzied GitHub repository url" >&2
  exit 1
fi

REPO="$(sed -e 's#^\(git@github.com:\|https://github.com/\)\([^/]\+/[^/]\+\)\.git$#\2#' <<< "$ORIGIN")"

DEFAULT_BRANCH="$(curl -s -L -H "Authorization: token $TOKEN" -H 'Accept: application/vnd.github.v3+json' "https://api.github.com/repos/$REPO" | grep 'default_branch' | sed -e 's/.*"default_branch"\s*:\s*"\([^"\]\+\)".*/\1/')"

git symbolic-ref refs/remotes/origin/HEAD "refs/remotes/origin/$DEFAULT_BRANCH"

You can run this in all repos in a folder using:

find . -maxdepth 2 -type d -name .git -execdir /path/to/reset-default-branch "your github token" \;