#!/usr/bin/env bash
# reset environment variables that could interfere with normal usage
export GREP_OPTIONS=
# put all utility functions here

# make a temporary file
git_extra_mktemp() {
    mktemp -t "$(basename "$0")".XXXXXXX
}

git_extra_default_branch() {
    local default_branch
    default_branch=$(git config --get git-extras.default-branch)
    if [ -z "$default_branch" ]; then
        echo "master"
    else
        echo "$default_branch"
    fi
}
#
# check whether current directory is inside a git repository
#

is_git_repo() {
  git rev-parse --show-toplevel > /dev/null 2>&1
  result=$?
  if test $result != 0; then
    >&2 echo 'Not a git repo!'
    exit $result
  fi
}

is_git_repo

set -euo pipefail

old=$1
new=$2

test -z $old && echo "old remote name required." 1>&2 && exit 1
test -z $new && echo "new remote name required." 1>&2 && exit 1

if ! git config --get "remote.$old.fetch" > /dev/null; then
  echo "remote $old doesn't exist"
  exit 1
fi

if git config --get "remote.$new.fetch" > /dev/null; then
  git remote remove $new
fi
git remote rename $old $new
git remote -v
