git-rename-branch

#!/usr/bin/env bash
# Based on https://github.com/tj/git-extras/blob/master/bin/git-rename-branch

set -eEu -o pipefail
IFS=$'\n\t'
PS4='+\t '

error_handler() { echo "Error: Line ${1} exited with status ${2}"; }
trap 'error_handler ${LINENO} $?' ERR

[[ "${TRACE:-0}" == "1" ]] && set -x


# Assert there is at least one branch provided
test -z "$1" && echo "new branch name required." 1>&2 && exit 1

if [[ -z "$2" ]]; then
    new_branch="$1"
    old_branch="$(git symbolic-ref --short -q HEAD)"
else
    new_branch="$2"
    old_branch="$1"
fi

remote=$(git config branch."$old_branch".remote; true)

git branch -m "$old_branch" "$new_branch"
# check if the branch is tracking a remote branch
if [[ -n "$remote" && "$remote" != "." ]]; then
    git push --delete "$remote" "$old_branch"
    git push --set-upstream "$remote" "$new_branch"
fi